The document describes a study that evaluated the compressive strength of concrete using nondestructive testing methods. Specifically, it used the rebound hammer test, ultrasonic pulse velocity test, and a combined method that uses both. Statistical analysis, including simple and multiple linear regression, was used to develop correlations between the nondestructive test results and actual compressive strengths from cylinder and core samples. The combined method was found to improve the accuracy of estimating compressive strength by taking into account factors that influence each test method differently. Equations derived from the statistical analysis can be used to predict compressive strength on site based on rebound hammer and ultrasonic pulse velocity measurements.
Predicting a mathematical models of some mechanical properties of concrete ...Alexander Decker
This document summarizes a study that aimed to develop mathematical models to predict mechanical properties
of concrete from non-destructive testing methods. Specifically, the study examined properties of normal strength
concrete and high-strength concrete with compressive strengths ranging from 20-100 MPa using Schmidt
hammer and ultrasonic pulse velocity tests at ages of 7, 28, 56, and 90 days. The results showed good
correlations between compressive strength and both test methods. Relationships were also found between
modulus of elasticity, rebound number, and age of concrete. The document provides background on types of
concrete and non-destructive testing methods.
Laboratory experimental study and elastic wave velocity on physical propertie...HoangTienTrung1
Pressure grouting has gained popularity as a soil reinforcement method. However, the behavior of the interface between rock and grout is not well known. This study investigates the interaction of pressure grouting and rock, through a series of laboratory tests performed on specially designed and fabricated equipment and using standard testing methods. The test measures the density, compressional strength, and frictional resistance of grout relative to the applied pressure and curing time. Simultaneously, the velocities of the elastic wave traveling through the grout are obtained to develop correlations between the physical properties of the grout and the test conditions. The results of the tests show that the density, compressional strength, and frictional resistance of the grout increase with applied pressure and curing time. The strengths of the influencing factors are seen to be correlated within the range of the test conditions. Using the results of these tests, the potential development of a new method that requires less cement was discussed.
1) Several non-destructive testing methods have been developed to evaluate the quality and strength of concrete without damaging it, including penetration tests, rebound tests, pull-out techniques, dynamic tests, and radioactive tests.
2) Penetration tests measure the depth that a probe penetrates the concrete, rebound tests measure the rebound distance of a hammer striking the concrete, and pull-out tests measure the force required to remove a steel rod cast into the concrete.
3) Dynamic tests like ultrasonic pulse velocity tests measure the speed of ultrasonic pulses through the concrete, which can indicate quality and strength. Radioactive tests use gamma rays to detect reinforcement location and density variations.
International Journal of Computational Engineering Research (IJCER) is dedicated to protecting personal information and will make every reasonable effort to handle collected information appropriately. All information collected, as well as related requests, will be handled as carefully and efficiently as possible in accordance with IJCER standards for integrity and objectivity
Experimental Study, Simulation and Model Predictions of Recycled PET Strip-Re...IJERA Editor
This study presents results from a theoretical-experimental program of beams partially pre-stressed made with continuous recycled PET strip-reinforced concrete (plain concrete strength of 20 MPa). These studies mainly attempted to determine the stripinfluence in altering the flexural strength at first and final crack. Also the load-deflection, ductility, energy absorption capacity of the beams are observed and the studies can be used in predicting the flexural behavior of longitudinally reinforced concrete. The model theory assumes that concrete has a tensile load capacity different from zero, characterized by a uniaxial tensile stress-strain diagram. The need for non-linear geometric and the material models imply the use of numerical methods such as the finite element method; so that, a finite element analysis of reinforced concrete beam with strips-reinforced plastic is performed. The obtained results were compared with computer analysis and experimental data to corroborate the validity of the suggested method, showing that the theory also predicts correctly the post-cracking creep deformation.
This document discusses various non-destructive evaluation tests for assessing concrete structures. It describes tests for evaluating in-situ concrete strength, including rebound hammer tests, ultrasonic pulse velocity tests, pullout tests, and core sampling and testing. It also discusses tests for assessing chemical attack, corrosion activity, fire damage, and structural integrity, such as carbonation testing, half-cell potential testing, and radiography. Rebound hammer testing involves using a spring-loaded hammer to measure surface hardness as an indicator of strength, while ultrasonic pulse velocity measures the speed of ultrasonic pulses through concrete.
Constructing a mathematical models to predict compressive strength of concIAEME Publication
The document presents a study that constructed mathematical models to predict the compressive strength of concrete from non-destructive testing methods. The study used normal strength concrete and high strength concrete mixes with cement, fine and coarse aggregates, and silica fume. Non-destructive tests including the Schmidt hammer test and ultrasonic pulse velocity test were performed on samples at various ages, along with destructive compressive strength tests. Relationships between compressive strength and test results were established. The results showed correlations between strength and test values, and that combined non-destructive test methods increased strength prediction reliability.
Techniques for repair and protection methods - Repair and rehabilitation of s...Shanmugasundaram N
This document discusses various techniques for repair and protection of structures, including non-destructive testing techniques, epoxy injection, shoring, underpinning, and corrosion protection techniques. It focuses on non-destructive testing techniques like rebound hammer testing, ultrasonic pulse velocity testing, radiographic testing, and magnetic particle testing. It also covers repair methods like epoxy injection, shotcrete, and corrosion protection methods using corrosion inhibitors and corrosion resistant steels. The document is authored by R. Satish Kumar and provides information on these structural assessment and repair techniques.
Predicting a mathematical models of some mechanical properties of concrete ...Alexander Decker
This document summarizes a study that aimed to develop mathematical models to predict mechanical properties
of concrete from non-destructive testing methods. Specifically, the study examined properties of normal strength
concrete and high-strength concrete with compressive strengths ranging from 20-100 MPa using Schmidt
hammer and ultrasonic pulse velocity tests at ages of 7, 28, 56, and 90 days. The results showed good
correlations between compressive strength and both test methods. Relationships were also found between
modulus of elasticity, rebound number, and age of concrete. The document provides background on types of
concrete and non-destructive testing methods.
Laboratory experimental study and elastic wave velocity on physical propertie...HoangTienTrung1
Pressure grouting has gained popularity as a soil reinforcement method. However, the behavior of the interface between rock and grout is not well known. This study investigates the interaction of pressure grouting and rock, through a series of laboratory tests performed on specially designed and fabricated equipment and using standard testing methods. The test measures the density, compressional strength, and frictional resistance of grout relative to the applied pressure and curing time. Simultaneously, the velocities of the elastic wave traveling through the grout are obtained to develop correlations between the physical properties of the grout and the test conditions. The results of the tests show that the density, compressional strength, and frictional resistance of the grout increase with applied pressure and curing time. The strengths of the influencing factors are seen to be correlated within the range of the test conditions. Using the results of these tests, the potential development of a new method that requires less cement was discussed.
1) Several non-destructive testing methods have been developed to evaluate the quality and strength of concrete without damaging it, including penetration tests, rebound tests, pull-out techniques, dynamic tests, and radioactive tests.
2) Penetration tests measure the depth that a probe penetrates the concrete, rebound tests measure the rebound distance of a hammer striking the concrete, and pull-out tests measure the force required to remove a steel rod cast into the concrete.
3) Dynamic tests like ultrasonic pulse velocity tests measure the speed of ultrasonic pulses through the concrete, which can indicate quality and strength. Radioactive tests use gamma rays to detect reinforcement location and density variations.
International Journal of Computational Engineering Research (IJCER) is dedicated to protecting personal information and will make every reasonable effort to handle collected information appropriately. All information collected, as well as related requests, will be handled as carefully and efficiently as possible in accordance with IJCER standards for integrity and objectivity
Experimental Study, Simulation and Model Predictions of Recycled PET Strip-Re...IJERA Editor
This study presents results from a theoretical-experimental program of beams partially pre-stressed made with continuous recycled PET strip-reinforced concrete (plain concrete strength of 20 MPa). These studies mainly attempted to determine the stripinfluence in altering the flexural strength at first and final crack. Also the load-deflection, ductility, energy absorption capacity of the beams are observed and the studies can be used in predicting the flexural behavior of longitudinally reinforced concrete. The model theory assumes that concrete has a tensile load capacity different from zero, characterized by a uniaxial tensile stress-strain diagram. The need for non-linear geometric and the material models imply the use of numerical methods such as the finite element method; so that, a finite element analysis of reinforced concrete beam with strips-reinforced plastic is performed. The obtained results were compared with computer analysis and experimental data to corroborate the validity of the suggested method, showing that the theory also predicts correctly the post-cracking creep deformation.
This document discusses various non-destructive evaluation tests for assessing concrete structures. It describes tests for evaluating in-situ concrete strength, including rebound hammer tests, ultrasonic pulse velocity tests, pullout tests, and core sampling and testing. It also discusses tests for assessing chemical attack, corrosion activity, fire damage, and structural integrity, such as carbonation testing, half-cell potential testing, and radiography. Rebound hammer testing involves using a spring-loaded hammer to measure surface hardness as an indicator of strength, while ultrasonic pulse velocity measures the speed of ultrasonic pulses through concrete.
Constructing a mathematical models to predict compressive strength of concIAEME Publication
The document presents a study that constructed mathematical models to predict the compressive strength of concrete from non-destructive testing methods. The study used normal strength concrete and high strength concrete mixes with cement, fine and coarse aggregates, and silica fume. Non-destructive tests including the Schmidt hammer test and ultrasonic pulse velocity test were performed on samples at various ages, along with destructive compressive strength tests. Relationships between compressive strength and test results were established. The results showed correlations between strength and test values, and that combined non-destructive test methods increased strength prediction reliability.
Techniques for repair and protection methods - Repair and rehabilitation of s...Shanmugasundaram N
This document discusses various techniques for repair and protection of structures, including non-destructive testing techniques, epoxy injection, shoring, underpinning, and corrosion protection techniques. It focuses on non-destructive testing techniques like rebound hammer testing, ultrasonic pulse velocity testing, radiographic testing, and magnetic particle testing. It also covers repair methods like epoxy injection, shotcrete, and corrosion protection methods using corrosion inhibitors and corrosion resistant steels. The document is authored by R. Satish Kumar and provides information on these structural assessment and repair techniques.
214 77 recommended practice for evaluation of strength tesMOHAMMED SABBAR
This document provides guidelines for analyzing the results of concrete strength tests using statistical methods. It discusses sources of variation in concrete strength, including materials properties, testing methods, and construction practices. Statistical analysis can help evaluate whether the concrete meets strength requirements while accounting for natural variability. The document recommends maintaining strict quality control, using random sampling, and following statistical procedures to properly interpret concrete strength test results.
A New Concept of using Transverse Loading to Characterize Environmental Stres...CrimsonPublishersRDMS
A New Concept of using Transverse Loading to Characterize Environmental Stress Cracking Resistance (ESCR) of Polyethylene (PE) by PY Ben Jar* in Crimson Publishers: Peer Reviewed Material Science Journals
A review on different destructive methods to determine the compressive streng...IJERD Editor
Determination of the compressive strength of an existing masonry attracted the attention of many scientists and researchers around the world. Most of these researchers, scientists and engineers want to find the best way to obtain the compressive strength of masonry in situ with high accuracy, and less cost. There are many methods to determine the compressive strength of masonry. Some of these methods are destructive methods and others are non-destructive methods and others are partially destructive. Each one of these testing methods has advantages and disadvantages .this paper presents different destructive testing Methodsfor obtaining the compressive strength of an existing masonry. Testing procedure, the main advantages and the problems of each method are explored.
This document reviews existing recommendations for defining the effective flexural, shear, and axial stiffness of concrete walls in design codes, standards, and past research. It then presents a process used by the authors to derive effective stiffness values from experimental wall test data. Sections 4-6 present the authors' analysis of test data from C-shaped walls, planar walls, and other non-planar wall specimens. Section 7 uses the recommended stiffness values in numerical models of coupled-wall tests. The document concludes by summarizing the results of the investigation.
This document discusses using acoustic emission (AE) techniques to non-destructively evaluate the properties of concrete and mortar, including compressive strength, flexural strength, and moisture content. Tests were conducted on concrete cubes and mortar cubes and beams with varying water-to-cement ratios. Results showed that the AE amplitude attenuated with increasing distance from the source, and that the attenuation factor correlated strongly with compressive strength, flexural strength, and moisture content - providing a way to predict these properties using a non-destructive AE method.
Evaluation of shear strength of model rock joints by experimental studyeSAT Publishing House
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology
Characterization of Differential Concrete Mix Designs by Ultrasonic Pulse Vel...IRJET Journal
This document summarizes a study that characterized different concrete mix designs using ultrasonic pulse velocity testing. Six mix designs were tested with varying water-cement ratios, slump, and compressive strengths. Concrete cubes were cast and tested for ultrasonic pulse velocity and compressive strength at various ages. The objectives were to examine how drying conditions and mix properties influence ultrasonic pulse velocity results, determine the relationship between velocity and compressive strength, and develop charts relating non-destructive test results to mix designs. Results aimed to improve accuracy of using non-destructive methods to evaluate concrete strength.
Experimental Determination of Fracture Energy by RILEM Methodtheijes
This paper deals with investigation of fracture energy (GF) of concrete. The study involves experimental determination of fracture energy (GF) by testing three point bend concrete beams of same size but varying notch to depth ratios. RILEM fracture energy (GF) and Stress Intensity factor values is determined
This document presents a simplified method for estimating the entire load profile of a fully grouted anchor bolt based on strain measurement data from two points near the loaded end. Pullout tests were conducted on anchor bolts grouted in concrete with two different grout types. Strain gauges attached to the bolts recorded data during loading. Interpolation of data from two gauges was able to estimate the full load profile along the bolt, matching the profile obtained from multiple gauges. This method provides a simplified way to determine an anchor bolt's load profile without needing data from along its entire length.
Nondestructive material testing with ultrasonicsFatma Abdalla
Ultrasonic pulse velocity (UPV) testing is a non-destructive testing method used to evaluate the quality and strength of concrete structures. UPV works by measuring the speed that ultrasonic pulses travel through the concrete, with higher velocities indicating higher quality concrete of greater density, homogeneity, and strength. The document describes experiments conducted to determine the relationship between UPV test results and compressive concrete strength for samples with varying water-cement ratios. UPV and compressive strength tests were performed on concrete samples at different ages. The results showed that UPV and strength increase with age and samples with lower water-cement ratios have higher UPV and strength. Correlation curves were developed to allow predicting concrete strength from
This document examines deflection criteria for masonry beams and lintels. It discusses previous research that showed masonry walls and beams act compositely, with the masonry in compression and beam in tension. Deflection limits of l/600 are suggested to prevent serviceability issues during construction. Methods for determining deflection of reinforced masonry beams are examined, with recommending using an effective moment of inertia approach. A span limit of l/d=8 is proposed where deflections do not need to be checked.
Modeling and finite element analysis for a casting defect in thin wall struct...Dr.Vikas Deulgaonkar
This document summarizes a study that used finite element analysis to model and simulate casting defects in thin-walled aluminum pump impeller structures. Various simulations were run to analyze factors like metal flow, heat transfer, solidification temperatures, and defect formation under different conditions. Actual castings were also produced and tested. The results showed that increasing the number of risers from one to three reduced blow holes and other defects, indicating the importance of proper gating and feeding systems to minimize defects in thin-walled castings. Comparisons between simulation temperatures and experimental temperatures also showed good agreement.
The document discusses how the level of predeformation affects the variability of forming properties in low carbon steel. It conducted experiments on low carbon steel specimens with four levels of predeformation (0%, 2%, 4%, 6%, and 8% engineering strain) plus an unstrained control group. The results showed that the common assumption that forming properties remain constant during multi-stage forming is only valid within a limited strain rate range of 0.05 to 0.1. Outside this range, different behaviors were observed. Mathematical modeling of the experimental data established empirical relationships to determine correction factors for forming property predictions.
1. The study evaluated the shear bond strength of a multilayer concrete system through experimental and analytical methods.
2. The experimental program tested the influence of surface preparation techniques and relative concrete strength on shear bond strength. It identified mechanical bonding with steel connectors as providing the highest bond strength.
3. The analytical model, based on equations from Eurocode 2, provided higher predicted bond strengths than measured experimentally. However, the model accurately estimated the relative bond strengths between different surface conditions.
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology
This document summarizes a study that investigated the compressive behavior of rigid polyvinyl chloride (PVC) foam at strain rates up to 200 s-1. Tests were conducted on PVC foam samples with densities ranging from 45 to 200 kg/m3 in directions parallel and perpendicular to the foam's rise direction. Both quasi-static and dynamic compression tests were performed using a customized drop tower device. The results showed that strain rate effects were observed at higher densities when loading in the foam rise direction, with increased compressive strength and plateau stress at higher strain rates. However, no significant strain rate effect was observed when loading perpendicular to the foam rise direction. Scanning electron microscopy analysis indicated that plastic hinges were the primary deformation
Effect of Coarse Aggregate Size on the Compressive Strength and the Flexural ...IJERA Editor
Concrete structures deflect, crack, and loose stiffness when subjected to external load. Loss of flexural strength of concrete is largely responsible for cracks in structure. In reinforced concrete structures, the mix proportions of the materials of the concrete and aggregate type determine the compressive strength while the composite action of concrete and steel reinforcement supplies the flexural strength. In occasion of loss of stiffness, steel reinforcement no longer supports flexural stresses; concrete in turn is subjected to flexure. The compressive strength and flexural strength therefore play a crucial role. Effect of varying coarse aggregate size on the flexural and compressive strengths of concrete beam was investigated. Concrete cubes and beams were produced in accordance with BS 1881-108 (1983) and ASTM C293 with varying aggregate sizes 9.0mm, 13.2mm, 19mm, 25.0mm and 37.5mm, using a standard mould of internal dimension 150x150x150 for the concrete cubes and a mould of internal dimension of 150 x 150 x 750mm for the reinforced concrete beam. The water cement ratio was kept at 0.65 with a mix proportion of 1:2:4. The specimen produced were all subjected to curing in water for 28days and were all tested to determine the compressive strength and flexural strength using Universal Testing Machine. Compressive strength of cubes is 21.26N/mm2, 23.41N/mm2, 23.66N/mm2, and 24.31N/mm2 for coarse aggregate sizes 13.2mm, 19mm, 25.0mm and 37.5mm respectively. That of flexural strength of test beams is 4.93N/mm2, 4.78N/mm2, 4.53N/mm2, 4.49N/mm2, 4.40N/mm2 respectively. In conclusion, concrete to be used mostly to resist flexural stresses should be made of finer coarse aggregates.
This document presents a non-polynomial framework for analyzing the bending behavior of multi-scale hybrid laminated nanocomposite (MHLNC) reinforced circular and annular plates under different boundary conditions and external pressures. The key points are:
- A state-space based differential quadrature method is used to examine the bending of MHLNC reinforced circular/annular plates considering various boundary conditions.
- Halpin-Tsai equations and fiber micromechanics are used to predict the effective material properties of the multi-scale composite at different hierarchical levels.
- A parametric study is conducted to analyze the effects of laminate stacking, plate type, and pressure type on the bending characteristics and stress-strain response
The document discusses Newton's three laws of motion:
1) An object at rest stays at rest and an object in motion stays in motion unless acted upon by an unbalanced force.
2) The acceleration of an object as produced by a net force is directly proportional to the magnitude of the net force.
3) For every action, there is an equal and opposite reaction.
1. The document discusses various methods for measuring linear and angular velocity, including electromagnetic, seismic, and digital transducers as well as using the Doppler effect.
2. Electromagnetic transducers are the most commonly used for linear velocity and work by inducing a voltage in a coil from the motion of a magnet. Moving magnet and moving coil types are described.
3. Angular velocity can be measured with a tachometer, which can be mechanical and count revolutions or electrical and generate a voltage proportional to speed.
This document provides instructions for using a ticker timer to measure acceleration due to gravity (g). The ticker timer makes marks on a paper tape as a counterweight falls, allowing measurement of distance and calculation of velocity and acceleration over time. Key steps include setting up the ticker timer horizontally, attaching a counterweight, releasing it to fall, measuring distances between marks, and using the velocities to calculate g based on the change in velocity over time intervals.
214 77 recommended practice for evaluation of strength tesMOHAMMED SABBAR
This document provides guidelines for analyzing the results of concrete strength tests using statistical methods. It discusses sources of variation in concrete strength, including materials properties, testing methods, and construction practices. Statistical analysis can help evaluate whether the concrete meets strength requirements while accounting for natural variability. The document recommends maintaining strict quality control, using random sampling, and following statistical procedures to properly interpret concrete strength test results.
A New Concept of using Transverse Loading to Characterize Environmental Stres...CrimsonPublishersRDMS
A New Concept of using Transverse Loading to Characterize Environmental Stress Cracking Resistance (ESCR) of Polyethylene (PE) by PY Ben Jar* in Crimson Publishers: Peer Reviewed Material Science Journals
A review on different destructive methods to determine the compressive streng...IJERD Editor
Determination of the compressive strength of an existing masonry attracted the attention of many scientists and researchers around the world. Most of these researchers, scientists and engineers want to find the best way to obtain the compressive strength of masonry in situ with high accuracy, and less cost. There are many methods to determine the compressive strength of masonry. Some of these methods are destructive methods and others are non-destructive methods and others are partially destructive. Each one of these testing methods has advantages and disadvantages .this paper presents different destructive testing Methodsfor obtaining the compressive strength of an existing masonry. Testing procedure, the main advantages and the problems of each method are explored.
This document reviews existing recommendations for defining the effective flexural, shear, and axial stiffness of concrete walls in design codes, standards, and past research. It then presents a process used by the authors to derive effective stiffness values from experimental wall test data. Sections 4-6 present the authors' analysis of test data from C-shaped walls, planar walls, and other non-planar wall specimens. Section 7 uses the recommended stiffness values in numerical models of coupled-wall tests. The document concludes by summarizing the results of the investigation.
This document discusses using acoustic emission (AE) techniques to non-destructively evaluate the properties of concrete and mortar, including compressive strength, flexural strength, and moisture content. Tests were conducted on concrete cubes and mortar cubes and beams with varying water-to-cement ratios. Results showed that the AE amplitude attenuated with increasing distance from the source, and that the attenuation factor correlated strongly with compressive strength, flexural strength, and moisture content - providing a way to predict these properties using a non-destructive AE method.
Evaluation of shear strength of model rock joints by experimental studyeSAT Publishing House
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology
Characterization of Differential Concrete Mix Designs by Ultrasonic Pulse Vel...IRJET Journal
This document summarizes a study that characterized different concrete mix designs using ultrasonic pulse velocity testing. Six mix designs were tested with varying water-cement ratios, slump, and compressive strengths. Concrete cubes were cast and tested for ultrasonic pulse velocity and compressive strength at various ages. The objectives were to examine how drying conditions and mix properties influence ultrasonic pulse velocity results, determine the relationship between velocity and compressive strength, and develop charts relating non-destructive test results to mix designs. Results aimed to improve accuracy of using non-destructive methods to evaluate concrete strength.
Experimental Determination of Fracture Energy by RILEM Methodtheijes
This paper deals with investigation of fracture energy (GF) of concrete. The study involves experimental determination of fracture energy (GF) by testing three point bend concrete beams of same size but varying notch to depth ratios. RILEM fracture energy (GF) and Stress Intensity factor values is determined
This document presents a simplified method for estimating the entire load profile of a fully grouted anchor bolt based on strain measurement data from two points near the loaded end. Pullout tests were conducted on anchor bolts grouted in concrete with two different grout types. Strain gauges attached to the bolts recorded data during loading. Interpolation of data from two gauges was able to estimate the full load profile along the bolt, matching the profile obtained from multiple gauges. This method provides a simplified way to determine an anchor bolt's load profile without needing data from along its entire length.
Nondestructive material testing with ultrasonicsFatma Abdalla
Ultrasonic pulse velocity (UPV) testing is a non-destructive testing method used to evaluate the quality and strength of concrete structures. UPV works by measuring the speed that ultrasonic pulses travel through the concrete, with higher velocities indicating higher quality concrete of greater density, homogeneity, and strength. The document describes experiments conducted to determine the relationship between UPV test results and compressive concrete strength for samples with varying water-cement ratios. UPV and compressive strength tests were performed on concrete samples at different ages. The results showed that UPV and strength increase with age and samples with lower water-cement ratios have higher UPV and strength. Correlation curves were developed to allow predicting concrete strength from
This document examines deflection criteria for masonry beams and lintels. It discusses previous research that showed masonry walls and beams act compositely, with the masonry in compression and beam in tension. Deflection limits of l/600 are suggested to prevent serviceability issues during construction. Methods for determining deflection of reinforced masonry beams are examined, with recommending using an effective moment of inertia approach. A span limit of l/d=8 is proposed where deflections do not need to be checked.
Modeling and finite element analysis for a casting defect in thin wall struct...Dr.Vikas Deulgaonkar
This document summarizes a study that used finite element analysis to model and simulate casting defects in thin-walled aluminum pump impeller structures. Various simulations were run to analyze factors like metal flow, heat transfer, solidification temperatures, and defect formation under different conditions. Actual castings were also produced and tested. The results showed that increasing the number of risers from one to three reduced blow holes and other defects, indicating the importance of proper gating and feeding systems to minimize defects in thin-walled castings. Comparisons between simulation temperatures and experimental temperatures also showed good agreement.
The document discusses how the level of predeformation affects the variability of forming properties in low carbon steel. It conducted experiments on low carbon steel specimens with four levels of predeformation (0%, 2%, 4%, 6%, and 8% engineering strain) plus an unstrained control group. The results showed that the common assumption that forming properties remain constant during multi-stage forming is only valid within a limited strain rate range of 0.05 to 0.1. Outside this range, different behaviors were observed. Mathematical modeling of the experimental data established empirical relationships to determine correction factors for forming property predictions.
1. The study evaluated the shear bond strength of a multilayer concrete system through experimental and analytical methods.
2. The experimental program tested the influence of surface preparation techniques and relative concrete strength on shear bond strength. It identified mechanical bonding with steel connectors as providing the highest bond strength.
3. The analytical model, based on equations from Eurocode 2, provided higher predicted bond strengths than measured experimentally. However, the model accurately estimated the relative bond strengths between different surface conditions.
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology
This document summarizes a study that investigated the compressive behavior of rigid polyvinyl chloride (PVC) foam at strain rates up to 200 s-1. Tests were conducted on PVC foam samples with densities ranging from 45 to 200 kg/m3 in directions parallel and perpendicular to the foam's rise direction. Both quasi-static and dynamic compression tests were performed using a customized drop tower device. The results showed that strain rate effects were observed at higher densities when loading in the foam rise direction, with increased compressive strength and plateau stress at higher strain rates. However, no significant strain rate effect was observed when loading perpendicular to the foam rise direction. Scanning electron microscopy analysis indicated that plastic hinges were the primary deformation
Effect of Coarse Aggregate Size on the Compressive Strength and the Flexural ...IJERA Editor
Concrete structures deflect, crack, and loose stiffness when subjected to external load. Loss of flexural strength of concrete is largely responsible for cracks in structure. In reinforced concrete structures, the mix proportions of the materials of the concrete and aggregate type determine the compressive strength while the composite action of concrete and steel reinforcement supplies the flexural strength. In occasion of loss of stiffness, steel reinforcement no longer supports flexural stresses; concrete in turn is subjected to flexure. The compressive strength and flexural strength therefore play a crucial role. Effect of varying coarse aggregate size on the flexural and compressive strengths of concrete beam was investigated. Concrete cubes and beams were produced in accordance with BS 1881-108 (1983) and ASTM C293 with varying aggregate sizes 9.0mm, 13.2mm, 19mm, 25.0mm and 37.5mm, using a standard mould of internal dimension 150x150x150 for the concrete cubes and a mould of internal dimension of 150 x 150 x 750mm for the reinforced concrete beam. The water cement ratio was kept at 0.65 with a mix proportion of 1:2:4. The specimen produced were all subjected to curing in water for 28days and were all tested to determine the compressive strength and flexural strength using Universal Testing Machine. Compressive strength of cubes is 21.26N/mm2, 23.41N/mm2, 23.66N/mm2, and 24.31N/mm2 for coarse aggregate sizes 13.2mm, 19mm, 25.0mm and 37.5mm respectively. That of flexural strength of test beams is 4.93N/mm2, 4.78N/mm2, 4.53N/mm2, 4.49N/mm2, 4.40N/mm2 respectively. In conclusion, concrete to be used mostly to resist flexural stresses should be made of finer coarse aggregates.
This document presents a non-polynomial framework for analyzing the bending behavior of multi-scale hybrid laminated nanocomposite (MHLNC) reinforced circular and annular plates under different boundary conditions and external pressures. The key points are:
- A state-space based differential quadrature method is used to examine the bending of MHLNC reinforced circular/annular plates considering various boundary conditions.
- Halpin-Tsai equations and fiber micromechanics are used to predict the effective material properties of the multi-scale composite at different hierarchical levels.
- A parametric study is conducted to analyze the effects of laminate stacking, plate type, and pressure type on the bending characteristics and stress-strain response
The document discusses Newton's three laws of motion:
1) An object at rest stays at rest and an object in motion stays in motion unless acted upon by an unbalanced force.
2) The acceleration of an object as produced by a net force is directly proportional to the magnitude of the net force.
3) For every action, there is an equal and opposite reaction.
1. The document discusses various methods for measuring linear and angular velocity, including electromagnetic, seismic, and digital transducers as well as using the Doppler effect.
2. Electromagnetic transducers are the most commonly used for linear velocity and work by inducing a voltage in a coil from the motion of a magnet. Moving magnet and moving coil types are described.
3. Angular velocity can be measured with a tachometer, which can be mechanical and count revolutions or electrical and generate a voltage proportional to speed.
This document provides instructions for using a ticker timer to measure acceleration due to gravity (g). The ticker timer makes marks on a paper tape as a counterweight falls, allowing measurement of distance and calculation of velocity and acceleration over time. Key steps include setting up the ticker timer horizontally, attaching a counterweight, releasing it to fall, measuring distances between marks, and using the velocities to calculate g based on the change in velocity over time intervals.
Evolution and exploration of the transcriptional landscape in two filamentous...Jason Stajich
The document summarizes comparative genomic analyses of the human pathogenic fungi Coccidioides immitis and Coccidioides posadasii. Genomes from 13 strains of the two Coccidioides species were sequenced and analyzed to reconstruct their evolutionary history and population structure. Phylogenetic analysis of the strains supported the distinction of the two species and identified potential introgression between species. Comparative genomics was also used to search for genetic differences underlying variations in virulence and distribution between strains that may provide insight into the molecular basis of Coccidioides pathogenesis.
This document provides information about force, motion, and graphs of motion. It defines force and motion, lists examples of each, and identifies different types of each including friction, gravity, magnetism, momentum, acceleration, speed, and velocity. It describes Newton's three laws of motion. It defines linear and nonlinear graphs and provides examples of acceleration-time graphs representing different motions. The graphs can be used to interpret whether an object is speeding up, slowing down, or moving at constant speed.
This document discusses units and measurement techniques. It defines scalars and vectors, and provides examples of each. It also describes various tools used to measure length, including rulers, vernier calipers, and micrometer screws. Rulers are used to measure to the nearest 0.1 cm, vernier calipers to 0.01 cm, and micrometer screws to 0.001 cm. The document also discusses techniques for adding vectors graphically using the parallelogram method.
Vectors and scalars for IB 11th gradersMESUT MIZRAK
This document discusses vectors and scalars in physics. It defines vectors as quantities that have both magnitude and direction, while scalars only have magnitude. Examples of each are provided. The document then discusses how to calculate the sum or difference of vectors graphically by adding or subtracting their magnitudes and directions. It also covers resolving vectors into perpendicular components, multiplying vectors by scalars, and finding the angle between adjacent vectors graphically or using trigonometry. Diagrams are provided to illustrate these vector concepts and calculations.
Newton's three laws of motion are summarized as follows:
1) An object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force.
2) The acceleration of an object as produced by a force is directly proportional to the force magnitude and inversely proportional to the mass of the object.
3) For every action, there is an equal and opposite reaction.
Sir Isaac Newton discovered the three laws of motion in the late 1600s. Newton's First Law states that an object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force. Newton's Second Law states that the force on an object equals its mass times its acceleration. Newton's Third Law states that for every action, there is an equal and opposite reaction.
A Novel Strong-Motion Seismic Network for Community Participation in Earthqua...Ali Osman Öncel
1) The Quake-Catcher Network (QCN) uses MEMS accelerometers and volunteer computers to create a low-cost seismic network that records earthquake ground motions.
2) Volunteer computers run software that monitors MEMS sensors and detects earthquake triggers, sending only metadata to central servers to rapidly identify quakes.
3) QCN aims to increase seismic station density worldwide to better detect, locate and characterize earthquakes through distributed computing and low-cost sensors.
Relationships 11 gen 26 1 6 slides 052911Alan Shelby
1. We should learn from past generations but not assume they were always right. We need to objectively evaluate their conduct and choices.
2. Challenges that were temptations for our parents can become tests for us. We should not run from challenges or distrust God, but face them with faith.
3. Our response to God's grace determines our future, not others' choices. We can choose our response even if we can't change the past.
2011apresentacao ps epesquisassaudeespiritualidadeMario Peres
O documento apresenta um curso de pós-graduação sobre pesquisas em saúde e espiritualidade. O curso tem como objetivo capacitar pesquisadores e profissionais de saúde na metodologia de pesquisa sobre espiritualidade e saúde. Ele é composto por três partes abordando espiritualidade e religião, metodologia de pesquisa, e espiritualidade na prática clínica.
This special bumper issue was a 24page, colour extravaganza. The theme was 'So this is Christmas, what've you done?'.
A big thanks to the contributors in this final issue:
Andy Goodridge
Camilla Grey
Chris Baréz-Brown
Dave Bedwood
Emma Sexton
Flo Heiss
Helen Walters
Jamie Coomber
Max Fraser
Michael Litman
Mike Reed
Nick Farnhill
Nicolas Roope
Nille Svensson
Rhiannon James
Simon Gill
Simon Manchipp
Yates Buckley
The document contains a chapter exam for a solid earth geophysics course. It asks 11 multiple choice or short answer questions about topics relating to oceanic lithosphere formation at mid-ocean ridges, transforms faults, trenches, and oceanic islands, including the deepest parts of the oceans, why the oldest ocean floor is only 200 million years old, typical water depths above seafloor of different ages, the relationships between various mid-ocean ridge systems, differences between continental margins on the east and west coasts of North and South America, locations of ophiolite belts, why earthquakes occur at mid-ocean ridges but not below 700km depth, calculating ages and spreading rates at the Mid-Atlantic Ridge, and estimating maximum se
Empreendedorismo no mundo plano, entenda porque a evolução do conhecimento humano se dará de forma exponencial e em que momento isso impactará o mundo no qual você vive, saiba se você está preparado e o que deve fazer para diminuir o impacto dessa evolução na sua vida.
Nessa palestra de 45 minutos você será transportado para um mundo que respira inovação e que está prestes a impactar tudo o que conhecemos como realidade, o conhecimento que possuímos e nossas expectativas para o futuro.
Conheça modelos de negócio inovadores, ideias e startups que estão fazendo uma verdadeira revolução mundial. Participe com a sua opinião e nos ajude a evoluir o conteúdo ministrado.
The African buffalo is a large herbivore that inhabits grasslands, savannahs, and wetlands in Africa. It can reach over 5 feet tall and weigh over a ton, making it one of the strongest land animals. African buffalos live in large herds and graze on grasses, herbs, and leaves. Their only natural predator is the lion, though buffalos often defeat lions in fights due to their size and strength. African buffalos are currently endangered due to habitat loss and poaching.
The document provides an introduction to seismology. It discusses magnitude occurrence based on the Gutenberg-Richter law which states that the number of earthquakes decreases exponentially with magnitude. It also discusses the expected largest earthquake in a year based on this relationship. Finally, it notes that the magnitude distribution considers all earthquakes in a data set or catalog, not just aftershocks.
Predicting a mathematical models of some mechanical properties of concrete ...Alexander Decker
This document summarizes a study that aimed to develop mathematical models to predict mechanical properties
of concrete from non-destructive testing methods. The study evaluated properties of normal strength concrete
(NSC) and high strength concrete (HSC) using Schmidt hammer and ultrasonic pulse velocity tests at ages of 7,
28, 56, and 90 days. Good correlations were found between compressive strength and both test methods. The
ultrasonic pulse velocity in HSC increased 8% from 28 to 90 days. Relationships were developed between
modulus of elasticity, rebound number, and age. The percentage increase in ultrasonic pulse velocity from 7 to
90 days was 3.5-
This document provides an overview of in-situ testing methods for concrete. It discusses the objectives of in-situ testing which include assessing quality, durability, and compliance with specifications. The document describes several common in-situ test methods like rebound hammer testing, ultrasonic pulse velocity testing, pull-out testing, and core testing. It explains how each test is performed and outlines factors that influence the results. The goal of in-situ testing is to evaluate concrete properties within existing structures in a non or minimally destructive manner.
Non-destructive testing methods can provide information about the properties of existing concrete structures without damaging them. Various methods are described in the document, including rebound hammer testing, ultrasonic pulse velocity testing, and radioactive methods. These methods measure physical properties like hardness, ultrasonic pulse transmission, and density that can help indicate characteristics like strength and uniformity or detect issues like cracking and honeycombing. Interpretation requires calibration and accounting for factors like materials and curing conditions. The goal of non-destructive testing is to evaluate concrete quality, strength, integrity, reinforcement, and signs of deterioration.
International Journal of Computational Engineering Research (IJCER) is dedicated to protecting personal information and will make every reasonable effort to handle collected information appropriately. All information collected, as well as related requests, will be handled as carefully and efficiently as possible in accordance with IJCER standards for integrity and objectivity
Comparative Analysis of Destructive and Non-Destructive Testing Method of Con...ijtsrd
This work presents a study on the comparison between Destructive Compressive test and Non destructive testing techniques Schmidt Rebound Hammer . Tests moisture content, Sieve analysis, particle density for aggregate and cement paste, bulk density, standard consistency of cement, slump test were performed on both the aggregate and cement to compare their accuracy of both methods and test the quality of the material to be used for concrete casting and estimating the strength of concrete. Seventy samples cubes of 150 x 150 x 150mm were prepared using mix designs of 1 2 4 with a constant w c ratio of 0.45 and were tested at 7, 14, 21 and 28 days respectively. From the results, the rebound number increased from an average of 12 for 7days to an average rebound number of 17.7 for 28days which is similar to the increment in compressive strength from an average of 24.3 for 7days to an average of 32 for 28days which show that the increment in the strength is uniform but 5 difference in value obtained. The slump test was between 62 78mm. From the results of the analysis, it was observed that the strength obtained from destructive process conformed to targeted mix value, whereas that of the Rebound hammer was below these values. Statistical analysis of the results obtained showed that 5 difference exists between the results obtained from the two methods. Hence, there was no significant difference between the means of the two methods for both mixes at a 0.05 level of significance. Non destructive Testing is observed to be more economical as it required no electricity and can also be used directly in the field. Onyeka, F. C | Mama, B. O "Comparative Analysis of Destructive and Non-Destructive Testing Method of Concrete Strength using Compressive and Rebound Harmmer Testing Method" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-4 | Issue-1 , December 2019, URL: https://www.ijtsrd.com/papers/ijtsrd29389.pdfPaper URL: https://www.ijtsrd.com/engineering/civil-engineering/29389/comparative-analysis-of-destructive-and-non-destructive-testing-method-of-concrete-strength-using-compressive-and-rebound-harmmer-testing-method/onyeka-f-c
Finite Element Modeling of a Multi-Storeyed Retrofitted Reinforced Concrete F...IOSR Journals
In the present study, the non-linear response of RC frame using FE modeling under the incremental
loading has been carried out in the first phase of analysis to study the response and load-carrying capacity of a
four storeyed RC frame using non-linear finite element analysis. In the second phase of study an analysis model
for retrofitted RC frame using finite element method using software ATENA is presented. The results obtained
from FE analysis in both cases are compared with the experimental data for four storeyed RC frame tested by
BARC at CPRI. The results from finite element analysis were calculated at the same location as used in
experimental test. The accuracy of the finite element model is assessed by the comparison with experimental
results which are to be in good agreement. The base shear/ displacement curves from finite element analysis
agree well with the experimental results in linear range. The maximum difference in base shear is observed to
be 7.9%
The document discusses non-destructive testing methods for concrete structures. It describes various NDT techniques like ultrasonic pulse velocity testing, rebound hammer testing, and half-cell potential testing. Three case studies on different structures are presented where these tests were used to evaluate concrete quality and integrity. The case studies found the concrete quality to vary from good to excellent. Non-destructive testing can check concrete structures without damage and help assess strength, cracks, reinforcement condition, and more.
IRJET- In-Situ Testing of Concrete Structures – A ReviewIRJET Journal
This document reviews various in-situ testing methods for concrete structures. It discusses common non-destructive testing (NDT) methods like rebound hammer testing and ultrasonic pulse velocity testing that can evaluate concrete strength and homogeneity. The document summarizes several studies that have investigated using these NDT methods to predict compressive concrete strength by correlating NDT results with destructive testing data. It concludes that while NDT methods are useful for assessing concrete properties, interpretation of test results can be difficult due to various factors affecting measurements.
Non destructive test in CIVIL ENGINEERING Construction SAURABH GUPTA
NON DESTRUCTIVE TEST (NDT)
SAURABH GUPTA
BLOG - http://notescivil.blogspot.in/
After this seminar you will able to answer the following
Non- destructive testing
Rebound hammer testing
Ultrasonic pulse velocity test
Cover test
methods including principle, advantages and point of action
NDT
Technique to test new or old concrete structure with respect to its strength and durability ,without or partial damage to a small part of concrete.
It doesn’t estimate ultimate or yield strength of concrete.
It is easy mechanized method, and is very cost effective , many test can be performed at the same cost of single destructive test.
No sample is required to collect for the laboratory testing as compare to some methods destructive testing
TEST
Rebound Hammer Test
Windsore Probe Testing
Ultrasonic Pulse Velocity Test
Acoustic Emission Method
Pulse Echo Method
Initial Surface Absorption Test
Radar Technique
Infrared Thermography
Quantab Test
Carbonation test
Profometer / Rebar locator
REBOUND HAMMER TEST (IS 13311 II)
Determination of strength and hardness of concrete.
ULTRASONIC PULSE VELOCITY TEST (IS 13311 I)
To determine the homogeneity, compatibility and cracks or void if present .
PROFOMETER / REBAR LOCATOR
Location of bar and diameter of bar
CARBONATION TEST
To estimate the amount of carbon and corrosion estimation.
To assess the likely compressive strength of concrete with help of with suitable co-relations between rebound index and compressive strength.
To assess the uniformity of concrete.
To assess the quality of concrete in relation to standard requirements.
To assess the quality of one element of concrete in relation to another
This method can be used with greater confidence for differentiating between the questionable and acceptable part of a structure or for relative comparison between two different structure.
When the plunger of rebound hammer is pressed against the surface of concrete, the spring control mass rebounds and the extent of such rebound depend upon the surface hardness of concrete, the rebound is thus related with compressive strength of concrete and the graduated scale is designated as rebound number
It Consists of spring controlled mass that slides on a plunger within a tubular housing.
The impact energy required for rebound hammer for different application is different (shown in table in next slide)
Rebound hammer is used to check –
1 Compressive strength of concrete
2 Uniformity of concrete
3 Quality of element of concrete
Ultrasonic pulse velocity test
To assess the uniformity and homogeneity of concrete.
To assess the quality of concrete in relation of standard requirement.
Detection of presence of voids, cracks & imperfection of concrete.
Measurement of changes occurring with time in the properties of concrete.
To overcome all these problems, the methods have been developed for investigation and evaluation of concrete st
Combination Of The Non-Destructive Methods For Evaluating The Quality Of Conc...IJERA Editor
The study is aboutthe use and comparison of three non-destructive methods (dynamic auscultation, sclerometric auscultation and auscultation by RADAR (Radio Detecting and Ranging) to monitor and assess the quality of concrete. Samples of reinforced concrete panels, dimensions 200x100x30 cm of concrete dosed at 350 kg/m3 with diverse E/C ratio were achieved, conserved in the laboratory and subjected to various non-destructive test. The synthesis of the results obtained by auscultation RADAR shows a decrease in the propagation speed of the electromagnetic wave with an increase of the E/C ratio and a decrease in resistance of concrete values measured and confirmed by other non-destructive techniques (sclerometric and dynamic auscultations). This shows that more the dielectric constant is high, morethe concrete resistance is reduced, and conversely the opposite.
Non Destructive Test's on Concrete BuildingAbiramiP6
This document discusses non-destructive testing methods for concrete structures. It begins with an introduction to non-destructive testing and its advantages over destructive testing. Then it describes several common non-destructive testing methods for concrete like rebound hammer testing, half-cell electrical potential testing, ultrasonic pulse velocity testing, and radiography testing. It explains how each method works and how to interpret the results. Finally, it provides references that were cited in the literature review section.
This document summarizes research on using ultrasonic pulse velocity (UPV) testing to estimate the condition of concrete structures. UPV is a non-destructive testing method that can evaluate properties like strength and durability without damaging the material. The document discusses how UPV works and how the test results are influenced by factors like water-cement ratio, curing time, and aggregate type. It also reviews prior studies that have investigated correlations between UPV measurements and compressive concrete strength to determine if UPV can reliably estimate load-bearing capacity. The goal of the research is to better understand how UPV can assess concrete quality and identify changes over time to help with maintenance and repair of structures.
This study establishes correlations between destructive and non-destructive testing of concrete compressive strength. Concrete cubes were cured for 7, 14, and 28 days and tested destructively via compression and non-destructively using a rebound hammer. Regression analysis found strong linear correlations (R2 91.6-97.9%) between rebound number and compressive strength. Models were able to predict compressive strength to within 1.3-1.8% of actual values on average, indicating rebound hammer can be used to accurately estimate compressive strength non-destructively.
IRJET - To Determine the Strength of Existing Structure through NDT Testi...IRJET Journal
This document discusses using non-destructive testing (NDT) methods like rebound hammer testing and ultrasonic pulse velocity testing to determine the strength of existing concrete structures. The researchers performed these NDT tests on columns, beams, and slabs of an existing building. Test results showed the concrete quality was medium to doubtful based on ultrasonic pulse velocity tests, and likely 18-22 MPa compressive strength based on rebound hammer tests. The study concluded NDT is an effective way to evaluate existing structures without damaging them.
Application of non destructive test for structural health monitoring - state ...eSAT Journals
Abstract
The concept of non-destructive testing (NDT) is to obtain material properties “in place” specimens without the destruction of the specimens and to do the structural health monitoring. NDT using Rebound hammer, Ultra pulse velocity, Half-cell potential, core cutter, carbonation depth, rebar locator, Rapid chloride penetration test, electric resistivity meter test and vibration base analysis by data analoger are very popular and highly effective in conducting structural health monitoring. The structure can be investigated by using a visual inspection, NDT, laboratory and field test performance. In this article a review of these tests have been provided to conduct effective structural health monitoring of a RCC structure
Keywords: Non-destructive test, visual inspection, corrosion, compressive strength
Non destructive evaluation of in-situ strength of high strength concreteIAEME Publication
This document summarizes a study on evaluating the in-situ strength of high-strength concrete (HSC) structures using non-destructive testing (NDT) techniques. Tests were conducted on HSC mixes with compressive strengths ranging from 50-130 MPa. Ultrasonic pulse velocity (UPV) and rebound hammer tests were performed on cubes before destructive compression testing. Correlation curves were developed between destructive and non-destructive parameters. Equations were formulated to correlate compressive strength with UPV, rebound number, and a combined method. Field tests on various structures found about a 10% variation between predicted strength from equations and experimental strength from cores. The study concluded that NDT techniques can reliably
Non destructive evaluation of in-situ strength of high strength concreteIAEME Publication
This document summarizes a study on evaluating the in-situ strength of high-strength concrete (HSC) structures using non-destructive testing (NDT) techniques. Tests were conducted on HSC mixes with compressive strengths ranging from 50-130 MPa. Ultrasonic pulse velocity (UPV) and rebound hammer tests were performed on cubes before destructive compression testing. Correlation curves were developed between destructive and non-destructive parameters. Equations were formulated to correlate compressive strength with UPV, rebound number, and a combined method. Field tests on various structures found about a 10% variation between predicted strength from equations and experimental strength from cores. The study concluded that NDT techniques can reliably
Non-destructive testing of concrete uses various methods to assess the strength and durability of concrete structures without damaging them. Common non-destructive testing methods described in the document include rebound hammer testing, pull-out testing, ultrasonic pulse velocity testing, and radioactive testing. Each method has benefits and limitations for providing information on properties like compressive strength, uniformity, presence of cracks, and condition of reinforcement. The results of non-destructive testing can be used to evaluate existing structures and monitor concrete quality during construction.
non destructive concrete testing equipment
non destructive concrete testing methods
non destructive test Penetration method
Rebound hammer method
Pull out test method
Ultrasonic pulse velocity method
Radioactive methods
methods of testing concrete
concrete strength testing methods
types of non destructive testing
non destructive concrete testing equipment
concrete tests pdf
destructive and non destructive testing
concrete testing procedures
non destructive test for concrete
destructive and non destructive testing
non destructive testing pdf
types of non destructive testing
non destructive testing methods
non destructive testing methods ppt
Reinforced concrete (RC) has become one of the most important building materials and is widely used in
many types of engineering structures. For the efficient use of RCC it is necessary to know the properties and the
behavior of RCC elements under various constrains. Within the framework of developing advanced design and
analysis methods for modern structures the need for experimental research continues
Similar to Measurements of Geophysical Velocity for Building Inspection (20)
Gravimetri Dersi için aşağıda ki videoları izleyebilirsiniz.
Link 01: https://www.youtube.com/watch?v=HTyjVaVGx0k
Link 02: https://www.youtube.com/watch?v=fUkfgI8XaOE
The document discusses gravity anomalies and density variations in different regions based on gravity data. It shows how gravity maps reveal details about crustal thickness, tectonic features like faults and volcanic zones, and plate boundaries. Specific examples discussed include the Tibetan Plateau, Central America subduction zone, an area in Chugoku, Japan, and the state of Florida in the US. Regional gravity data can be used to model density changes associated with plate tectonics, crustal evolution, and volcanic and tectonic activity.
The USF team reviewed a geophysical investigation of the Kar Kar region conducted by WesternGeco in 2011. They found that WesternGeco's magnetotelluric (MT) data and models were of high quality. Both the WesternGeco and USF MT models identified a low resistivity zone at 300m depth that correlates with a water-bearing zone found in Borehole 4. USF performed gravity modeling which identified a north-south trending basin reaching 1500m depth, consistent with mapped faults. A preliminary hydrothermal model suggested observed temperatures could result from deep circulation of meteoric waters in the basin without needing a localized heat source. Additional geophysical data is recommended around the Jermaghbyur hot springs to
This document summarizes a study that used gravity data to delineate underground structure in the Beppu geothermal field in Japan. Analysis of Bouguer anomaly maps revealed high anomalies in the southern and northern parts of the study area that correspond to known geological formations. Edge detection filtering of the gravity data helped identify subsurface faults, including the northern edge of the high southern anomaly corresponding to the Asamigawa Fault. Depth modeling of the gravity basement showed differences between the southern and northern hot spring areas, with steep basement slopes along faults in the south and uplifted basement in the north.
This document summarizes the development of a new ultra-high resolution model of Earth's gravity field called GGMplus. Key points:
- GGMplus combines satellite gravity data from GOCE and GRACE with terrestrial gravity data and topography to achieve unprecedented 200m spatial resolution globally.
- It provides gridded estimates of gravity, horizontal and radial field components, and quasi-geoid heights at over 3 billion points covering 80% of the Earth's land.
- GGMplus reveals new details of small-scale gravity variations and identifies locations of minimum and maximum gravity, suggesting peak-to-peak variations are 40% larger than previous estimates. The model will benefit scientific and engineering applications.
Gravity measurements were taken in a region of China covering the south-north earthquake belt in 1998, 2000, 2002, and 2005. Researchers noticed significant gravity changes in the region surrounding Wenchuan and suggested in 2006 that a major earthquake could occur there in 2007 or 2008. While gravity changes were significant at some locations, more research is needed to determine if they could be considered a precursor. Uncertainties exist from measurement errors, hydrologic effects, and crustal movements. Improved data collection and analysis could enhance using gravity monitoring for earthquake research.
The document provides guidelines for implementing the H/V spectral ratio technique using ambient vibration measurements to evaluate site effects. It recommends procedures for experimental design, data processing, and interpretation. The key recommendations include measuring for sufficient duration depending on expected frequency, using multiple measurement points, avoiding disturbances, and interpreting H/V peaks in context with geological and geophysical data. Reliable H/V peaks are defined as having a clear maximum within expected frequency ranges and uncertainties. The guidelines aim to help apply the technique while accounting for its limitations.
Geopsy yaygın olarak kullanılan profesyonel bir program. Özellikle, profesyonel program deneyimi yeni mezunlarda çok aranan bir özellik. Bir öğrencim çalışmasında kullanmayı planlıyor.
Creative Restart 2024: Mike Martin - Finding a way around “no”Taste
Ideas that are good for business and good for the world that we live in, are what I’m passionate about.
Some ideas take a year to make, some take 8 years. I want to share two projects that best illustrate this and why it is never good to stop at “no”.
How to Setup Default Value for a Field in Odoo 17Celine George
In Odoo, we can set a default value for a field during the creation of a record for a model. We have many methods in odoo for setting a default value to the field.
🔥🔥🔥🔥🔥🔥🔥🔥🔥
إضغ بين إيديكم من أقوى الملازم التي صممتها
ملزمة تشريح الجهاز الهيكلي (نظري 3)
💀💀💀💀💀💀💀💀💀💀
تتميز هذهِ الملزمة بعِدة مُميزات :
1- مُترجمة ترجمة تُناسب جميع المستويات
2- تحتوي على 78 رسم توضيحي لكل كلمة موجودة بالملزمة (لكل كلمة !!!!)
#فهم_ماكو_درخ
3- دقة الكتابة والصور عالية جداً جداً جداً
4- هُنالك بعض المعلومات تم توضيحها بشكل تفصيلي جداً (تُعتبر لدى الطالب أو الطالبة بإنها معلومات مُبهمة ومع ذلك تم توضيح هذهِ المعلومات المُبهمة بشكل تفصيلي جداً
5- الملزمة تشرح نفسها ب نفسها بس تكلك تعال اقراني
6- تحتوي الملزمة في اول سلايد على خارطة تتضمن جميع تفرُعات معلومات الجهاز الهيكلي المذكورة في هذهِ الملزمة
واخيراً هذهِ الملزمة حلالٌ عليكم وإتمنى منكم إن تدعولي بالخير والصحة والعافية فقط
كل التوفيق زملائي وزميلاتي ، زميلكم محمد الذهبي 💊💊
🔥🔥🔥🔥🔥🔥🔥🔥🔥
How to Download & Install Module From the Odoo App Store in Odoo 17Celine George
Custom modules offer the flexibility to extend Odoo's capabilities, address unique requirements, and optimize workflows to align seamlessly with your organization's processes. By leveraging custom modules, businesses can unlock greater efficiency, productivity, and innovation, empowering them to stay competitive in today's dynamic market landscape. In this tutorial, we'll guide you step by step on how to easily download and install modules from the Odoo App Store.
Brand Guideline of Bashundhara A4 Paper - 2024khabri85
It outlines the basic identity elements such as symbol, logotype, colors, and typefaces. It provides examples of applying the identity to materials like letterhead, business cards, reports, folders, and websites.
Level 3 NCEA - NZ: A Nation In the Making 1872 - 1900 SML.pptHenry Hollis
The History of NZ 1870-1900.
Making of a Nation.
From the NZ Wars to Liberals,
Richard Seddon, George Grey,
Social Laboratory, New Zealand,
Confiscations, Kotahitanga, Kingitanga, Parliament, Suffrage, Repudiation, Economic Change, Agriculture, Gold Mining, Timber, Flax, Sheep, Dairying,
Andreas Schleicher presents PISA 2022 Volume III - Creative Thinking - 18 Jun...EduSkills OECD
Andreas Schleicher, Director of Education and Skills at the OECD presents at the launch of PISA 2022 Volume III - Creative Minds, Creative Schools on 18 June 2024.
Elevate Your Nonprofit's Online Presence_ A Guide to Effective SEO Strategies...TechSoup
Whether you're new to SEO or looking to refine your existing strategies, this webinar will provide you with actionable insights and practical tips to elevate your nonprofit's online presence.