This study examined the non-destructive strength parameters of high strength concrete containing silica fume. Sixteen concrete mixes were tested at 28 days for rebound hammer value and ultrasonic pulse velocity. Regression analysis found exponential relationships between compressive strength and rebound number, and reciprocal relationships between strength and pulse velocity. Both rebound value and pulse velocity increased with higher silica fume content up to 10%, indicating strength also increased. The relationships developed can be used to predict concrete strength non-destructively using rebound hammer or pulse velocity tests.
Destructive and Non- Destructive Testing for Concrete in Sudan - A Comparativ...iosrjce
IOSR Journal of Mechanical and Civil Engineering (IOSR-JMCE) is a double blind peer reviewed International Journal that provides rapid publication (within a month) of articles in all areas of mechanical and civil engineering and its applications. The journal welcomes publications of high quality papers on theoretical developments and practical applications in mechanical and civil engineering. Original research papers, state-of-the-art reviews, and high quality technical notes are invited for publications.
Municipal Solid Waste Incinerated(MSWI) Bottom AshGauravKumar2456
Reduction of Municipal Solid Waste and utilize it in making aggregate of required compressive strength till M20 grade. Also it is economic and eco-friendly.
International Journal of Engineering and Science Invention (IJESI) is an international journal intended for professionals and researchers in all fields of computer science and electronics. IJESI publishes research articles and reviews within the whole field Engineering Science and Technology, new teaching methods, assessment, validation and the impact of new technologies and it will continue to provide information on the latest trends and developments in this ever-expanding subject. The publications of papers are selected through double peer reviewed to ensure originality, relevance, and readability. The articles published in our journal can be accessed online.
Experimental studies in Ultrasonic Pulse Velocity of rollerJoel 'almeida
This paper presents the experimental investigation results of Ultrasonic Pulse Velocity (UPV) tests conducted on roller compacted
concrete pavement (RCCP) material containing Class F fly ash of as mineral admixture. River sand, M-sand and combination of Msand
and River sand are used as fine aggregate in this experimental work. Three types of fly ash roller compacted concrete mixes are
prepared using above three types of fine aggregates and they are designated as Series A (River sand), Series B (manufactured sand)
and Series C (combination of River sand and M-sand). In each series the fly ash content in place of cement is varied from 0% to
60%. In each series and for different ages of curing (i.e 3, 7, 28 and 90 days) forty two cube specimens are cast and tested for compressive
strength and UPV. The UPV results of fly ash containing roller compacted concrete pavement (FRCCP) show lower values at all ages
from 3 days to 90 days in comparison with control mix concrete (0% fly ash) in all mixes. However, it is also observed that Series B and C
mixes containing fly ash show better results in UPV values, compressive strength and Dynamic Elastic Modulus in comparison to Series
A mixes with fly ash. Relationships between compressive strength of FRCCP and UPV and Dynamic Elastic Modulus are proposed for
all series mixes. A new empirical equation is proposed to determine the Dynamic Elastic Modulus of FRCCP.
Destructive and Non- Destructive Testing for Concrete in Sudan - A Comparativ...iosrjce
IOSR Journal of Mechanical and Civil Engineering (IOSR-JMCE) is a double blind peer reviewed International Journal that provides rapid publication (within a month) of articles in all areas of mechanical and civil engineering and its applications. The journal welcomes publications of high quality papers on theoretical developments and practical applications in mechanical and civil engineering. Original research papers, state-of-the-art reviews, and high quality technical notes are invited for publications.
Municipal Solid Waste Incinerated(MSWI) Bottom AshGauravKumar2456
Reduction of Municipal Solid Waste and utilize it in making aggregate of required compressive strength till M20 grade. Also it is economic and eco-friendly.
International Journal of Engineering and Science Invention (IJESI) is an international journal intended for professionals and researchers in all fields of computer science and electronics. IJESI publishes research articles and reviews within the whole field Engineering Science and Technology, new teaching methods, assessment, validation and the impact of new technologies and it will continue to provide information on the latest trends and developments in this ever-expanding subject. The publications of papers are selected through double peer reviewed to ensure originality, relevance, and readability. The articles published in our journal can be accessed online.
Experimental studies in Ultrasonic Pulse Velocity of rollerJoel 'almeida
This paper presents the experimental investigation results of Ultrasonic Pulse Velocity (UPV) tests conducted on roller compacted
concrete pavement (RCCP) material containing Class F fly ash of as mineral admixture. River sand, M-sand and combination of Msand
and River sand are used as fine aggregate in this experimental work. Three types of fly ash roller compacted concrete mixes are
prepared using above three types of fine aggregates and they are designated as Series A (River sand), Series B (manufactured sand)
and Series C (combination of River sand and M-sand). In each series the fly ash content in place of cement is varied from 0% to
60%. In each series and for different ages of curing (i.e 3, 7, 28 and 90 days) forty two cube specimens are cast and tested for compressive
strength and UPV. The UPV results of fly ash containing roller compacted concrete pavement (FRCCP) show lower values at all ages
from 3 days to 90 days in comparison with control mix concrete (0% fly ash) in all mixes. However, it is also observed that Series B and C
mixes containing fly ash show better results in UPV values, compressive strength and Dynamic Elastic Modulus in comparison to Series
A mixes with fly ash. Relationships between compressive strength of FRCCP and UPV and Dynamic Elastic Modulus are proposed for
all series mixes. A new empirical equation is proposed to determine the Dynamic Elastic Modulus of FRCCP.
Investigation on fine aggregate by broken tiles in concreteIJARIIT
This examination manages the effect on the concrete by the partial replacement of fine aggregate by ceramic
aggregate. Studies were done on a concrete, with various replacement. The impacts of various replacements 0, 10, 20, 30&40
percent of the waste ceramic tile by weight of concrete with M-30 review. At last, it was reasoned that all the strength qualities
(compressive strength, flexural strength & split tensile strength) of concrete increases with the various replacements.
Effect of robo sand on strength characteristic of recycled aggregate concreteeSAT Journals
Abstract
With increased depletion of natural construction materials, alternative means must be sought for substitution of the same. Excessive energy consumption in the production of construction materials, environmental setbacks and debris disposal are some of the other burning issues fuelling the need for reuse of the raw materials. With the need of natural sand, there is an urgent need for a product that matches the properties of natural sand in concrete. Construction- Demolition waste and ROBO Sand are some of the upcoming resources which enables effective replacement of the materials of mineral origin. In the present work, natural coarse aggregate was replaced with recycled coarse aggregate and river sand was replaced with ROBO Sand in different percentages in plain cement concrete. Different strength test were conducted with combination of ROBO Sand and recycled aggregate to study the effect of these two materials on strength Concrete with a characteristic compressive strength of 30 N/mm2 (M30 grade), was used for our study. In total, 16 sets of 6 cubes each were cast and tested.
Keywords: ROBO Sand, recycled aggregate
Rebound hammer test - Maintenance and Rehabilitation of StructuresAshishVivekSukh
Rebound Hammer test is a Non-destructive testing method of concrete.
Rapid indication of the compressive strength of the concrete.
The rebound hammer is also called as Schmidt hammer.
Consist of a spring controlled mass that slides on a plunger within a tubular housing.
PRIDICTION OF COMPRESSIVE STRENGTH OF CEMENT BY USING REGRESSION TECHNIQUE WI...civej
This paper presents the comparison of results i.e., (compressive strength of cement) by the experimental
study and Regression model to evaluate the possibility of utilizing the hylam powder as a partial
replacement in cement mortar. The remarkable increase in the production of hylam and its disposal in an
ecofriendly manner is increasingly becoming a matter of global concern. Hylam powder is a waste
produced from hylam sheets at the time of fabrication (Cutting, Making holes and polishing process) is
used as a partial replacement in cement. A total 63cement cube were casted and tested for 3,7& 28days of
seven mortar mix (i.e. 0%, 3%, 5%, 7%, 10%, 13% & 15% of Hylam powder was replaced by weight of
cement). The results show that incorporation of the hylam powder yields to the increase of strength at the
age (28 days) in comparison with that of a control mortar.
it is the method which used for to check the concrete stability and to check the strength by without damage and partially damage to the concrete.
it has no. of advantages and method use in it.
it is the advance technology in concrete.
Presentation on using industrial waste water in making of plain concrete @ in...Raghavendra Rachamadugu
Improving ‘waste reduction’ and ‘recycling techniques’ is currently being advocated worldwide. For transforming our words into action, finding a remedy became imperative. Our intentions drifted our attention towards efficiency of water treatment, dissipation of wealth for partially recovering its potability and conserving the precious water resource for sustainable development. With the world advancing in concrete technology and growing scarcity of usable water, we are compelled to start with replacing the use of potable water in construction by ‘industrial waste water’. The feasibility of using industrial effluents as mixing water and the effect of its constituents on cement mortar properties were experimentally evaluated. Cement mortar specimens were cast using crude waste water and deionised water for comparison. This paper examines the effect of industrial waste water (from electroplating industry) on cement mortar properties like setting time, density and compressive strength. Using fairly conservative assumptions regarding the life of concrete prepared using water tainted with metallic ions, the rate of chemical deterioration and with a greater emphasis on cost effectiveness, it can be shown that this breakthrough most likely achieves overall positive social benefits.
Analytical Study of Steel Fibre Reinforced Rigid Pavements under Static Loadijsrd.com
Nowadays, the application of steel fibers in concrete has increased gradually as an engineering material. The knowledge is not only necessary to provide safe, efficient and economic design for the present, but it also to serve as a rational basis for extended future applications. In this study, steel fibre reinforced rigid pavements are analyzed for stresses developed due to Static loads & temperature differentials. All the models are generated and analysis is carried out using the ANSYS software. Comparison of curling stresses in SFRC with conventional concrete is carried out. Parametric study for the effect of change in slab length & slab thickness of pavements on curling stresses is also done. Curling stresses due to Linear & Nonlinear temperature distribution in top & bottom layer of SFRC pavement slabs are also calculated. Frictional stresses in SFRC due to uniform temperature differential are almost same as conventional concrete. Analysis results shows, SFRC develops more stresses as compared to conventional concrete & nonlinear temperature distribution develops more stresses than linear temperature distribution. SFRC pavements are analyzed for Single axle static load for varied thickness and subgrade. Results reveal that the loading stresses are higher, when the load is at the edge region.
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.
Investigation on fine aggregate by broken tiles in concreteIJARIIT
This examination manages the effect on the concrete by the partial replacement of fine aggregate by ceramic
aggregate. Studies were done on a concrete, with various replacement. The impacts of various replacements 0, 10, 20, 30&40
percent of the waste ceramic tile by weight of concrete with M-30 review. At last, it was reasoned that all the strength qualities
(compressive strength, flexural strength & split tensile strength) of concrete increases with the various replacements.
Effect of robo sand on strength characteristic of recycled aggregate concreteeSAT Journals
Abstract
With increased depletion of natural construction materials, alternative means must be sought for substitution of the same. Excessive energy consumption in the production of construction materials, environmental setbacks and debris disposal are some of the other burning issues fuelling the need for reuse of the raw materials. With the need of natural sand, there is an urgent need for a product that matches the properties of natural sand in concrete. Construction- Demolition waste and ROBO Sand are some of the upcoming resources which enables effective replacement of the materials of mineral origin. In the present work, natural coarse aggregate was replaced with recycled coarse aggregate and river sand was replaced with ROBO Sand in different percentages in plain cement concrete. Different strength test were conducted with combination of ROBO Sand and recycled aggregate to study the effect of these two materials on strength Concrete with a characteristic compressive strength of 30 N/mm2 (M30 grade), was used for our study. In total, 16 sets of 6 cubes each were cast and tested.
Keywords: ROBO Sand, recycled aggregate
Rebound hammer test - Maintenance and Rehabilitation of StructuresAshishVivekSukh
Rebound Hammer test is a Non-destructive testing method of concrete.
Rapid indication of the compressive strength of the concrete.
The rebound hammer is also called as Schmidt hammer.
Consist of a spring controlled mass that slides on a plunger within a tubular housing.
PRIDICTION OF COMPRESSIVE STRENGTH OF CEMENT BY USING REGRESSION TECHNIQUE WI...civej
This paper presents the comparison of results i.e., (compressive strength of cement) by the experimental
study and Regression model to evaluate the possibility of utilizing the hylam powder as a partial
replacement in cement mortar. The remarkable increase in the production of hylam and its disposal in an
ecofriendly manner is increasingly becoming a matter of global concern. Hylam powder is a waste
produced from hylam sheets at the time of fabrication (Cutting, Making holes and polishing process) is
used as a partial replacement in cement. A total 63cement cube were casted and tested for 3,7& 28days of
seven mortar mix (i.e. 0%, 3%, 5%, 7%, 10%, 13% & 15% of Hylam powder was replaced by weight of
cement). The results show that incorporation of the hylam powder yields to the increase of strength at the
age (28 days) in comparison with that of a control mortar.
it is the method which used for to check the concrete stability and to check the strength by without damage and partially damage to the concrete.
it has no. of advantages and method use in it.
it is the advance technology in concrete.
Presentation on using industrial waste water in making of plain concrete @ in...Raghavendra Rachamadugu
Improving ‘waste reduction’ and ‘recycling techniques’ is currently being advocated worldwide. For transforming our words into action, finding a remedy became imperative. Our intentions drifted our attention towards efficiency of water treatment, dissipation of wealth for partially recovering its potability and conserving the precious water resource for sustainable development. With the world advancing in concrete technology and growing scarcity of usable water, we are compelled to start with replacing the use of potable water in construction by ‘industrial waste water’. The feasibility of using industrial effluents as mixing water and the effect of its constituents on cement mortar properties were experimentally evaluated. Cement mortar specimens were cast using crude waste water and deionised water for comparison. This paper examines the effect of industrial waste water (from electroplating industry) on cement mortar properties like setting time, density and compressive strength. Using fairly conservative assumptions regarding the life of concrete prepared using water tainted with metallic ions, the rate of chemical deterioration and with a greater emphasis on cost effectiveness, it can be shown that this breakthrough most likely achieves overall positive social benefits.
Analytical Study of Steel Fibre Reinforced Rigid Pavements under Static Loadijsrd.com
Nowadays, the application of steel fibers in concrete has increased gradually as an engineering material. The knowledge is not only necessary to provide safe, efficient and economic design for the present, but it also to serve as a rational basis for extended future applications. In this study, steel fibre reinforced rigid pavements are analyzed for stresses developed due to Static loads & temperature differentials. All the models are generated and analysis is carried out using the ANSYS software. Comparison of curling stresses in SFRC with conventional concrete is carried out. Parametric study for the effect of change in slab length & slab thickness of pavements on curling stresses is also done. Curling stresses due to Linear & Nonlinear temperature distribution in top & bottom layer of SFRC pavement slabs are also calculated. Frictional stresses in SFRC due to uniform temperature differential are almost same as conventional concrete. Analysis results shows, SFRC develops more stresses as compared to conventional concrete & nonlinear temperature distribution develops more stresses than linear temperature distribution. SFRC pavements are analyzed for Single axle static load for varied thickness and subgrade. Results reveal that the loading stresses are higher, when the load is at the edge region.
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.
IOSR Journal of Pharmacy and Biological Sciences(IOSR-JPBS) is an open access international journal that provides rapid publication (within a month) of articles in all areas of Pharmacy and Biological Science. The journal welcomes publications of high quality papers on theoretical developments and practical applications in Pharmacy and Biological Science. Original research papers, state-of-the-art reviews, and high quality technical notes are invited for publications.
Concept of Regression Analysis in Concrete Mix Designijtsrd
In civil engineering, on site concrete mixing is very important .To determine compressive strength of concrete mix, statistical method is very useful. Regression analysis is an effective statistical technique. By analysing the laboratory concrete block/ cylinder tests , we can determine not only the correlation between compressive strength at different curing ages of concrete but also variation in material properties, ratios and variation in % of fly ash as a partial replacement of concrete. Manisha S. Kukade | Trupti S. Joshi | Sumit D. Sanghani"Concept of Regression Analysis in Concrete Mix Design" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-2 | Issue-2 , February 2018, URL: http://www.ijtsrd.com/papers/ijtsrd10708.pdf http://www.ijtsrd.com/engineering/civil-engineering/10708/concept-of-regression-analysis-in-concrete-mix-design/manisha-s-kukade
Size Anddosageof Micro Silica Fume Behaviour for Partial Replacement of Cemen...iosrjce
IOSR Journal of Mechanical and Civil Engineering (IOSR-JMCE) is a double blind peer reviewed International Journal that provides rapid publication (within a month) of articles in all areas of mechanical and civil engineering and its applications. The journal welcomes publications of high quality papers on theoretical developments and practical applications in mechanical and civil engineering. Original research papers, state-of-the-art reviews, and high quality technical notes are invited for publications.
Modified Behaviour of Concrete by Replacing Fine Aggregates with Coal Fly Ashijtsrd
The prime objective of the study was to evaluate the structural properties and potential of concrete containing coal fly ash that of concrete containing no coal fly ash of corresponding mix proportions and strength. The cubes were tested for the compressive strength and beams specimens were tested for flexural strength. Splitting tensile strength tests were conducted on cylinder specimens. The total numbers of 60 cubes, 40 beams specimens and 40 numbers of cylinders were tested for compressive strength, flexural strength and splitting tensile strength respectively at different ages to study the following aspect. The effect on unit weight of concrete after incorporating varying proportions of bottom ash. The effect of coal fly ash on workability C.F of fresh concrete. The effect on compressive, flexural and splitting tensile strength using bottom ash in varying percentages as a partial replacement of fine aggregates. Mix containing 30 and 40 bottom ash, at 90 days, attains the compressive strength equivalent to 109.13 and 105.17 of compressive strength of normal concrete at 28 days and attains flexural strength in the range of 112 116.3 at 90 days of flexural strength of normal concrete at 28 days. Dev Karan | Er. Sunil Kumar | Er. Vikram ""Modified Behaviour of Concrete by Replacing Fine Aggregates with Coal Fly Ash"" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-3 | Issue-4 , June 2019, URL: https://www.ijtsrd.com/papers/ijtsrd25191.pdf
Paper URL: https://www.ijtsrd.com/engineering/civil-engineering/25191/modified-behaviour-of-concrete-by-replacing-fine-aggregates-with-coal-fly-ash/dev-karan
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
International Journal of Engineering and Science Invention (IJESI)inventionjournals
International Journal of Engineering and Science Invention (IJESI) is an international journal intended for professionals and researchers in all fields of computer science and electronics. IJESI publishes research articles and reviews within the whole field Engineering Science and Technology, new teaching methods, assessment, validation and the impact of new technologies and it will continue to provide information on the latest trends and developments in this ever-expanding subject. The publications of papers are selected through double peer reviewed to ensure originality, relevance, and readability. The articles published in our journal can be accessed online.
Accelerate your Kubernetes clusters with Varnish CachingThijs Feryn
A presentation about the usage and availability of Varnish on Kubernetes. This talk explores the capabilities of Varnish caching and shows how to use the Varnish Helm chart to deploy it to Kubernetes.
This presentation was delivered at K8SUG Singapore. See https://feryn.eu/presentations/accelerate-your-kubernetes-clusters-with-varnish-caching-k8sug-singapore-28-2024 for more details.
Slack (or Teams) Automation for Bonterra Impact Management (fka Social Soluti...Jeffrey Haguewood
Sidekick Solutions uses Bonterra Impact Management (fka Social Solutions Apricot) and automation solutions to integrate data for business workflows.
We believe integration and automation are essential to user experience and the promise of efficient work through technology. Automation is the critical ingredient to realizing that full vision. We develop integration products and services for Bonterra Case Management software to support the deployment of automations for a variety of use cases.
This video focuses on the notifications, alerts, and approval requests using Slack for Bonterra Impact Management. The solutions covered in this webinar can also be deployed for Microsoft Teams.
Interested in deploying notification automations for Bonterra Impact Management? Contact us at sales@sidekicksolutionsllc.com to discuss next steps.
PHP Frameworks: I want to break free (IPC Berlin 2024)Ralf Eggert
In this presentation, we examine the challenges and limitations of relying too heavily on PHP frameworks in web development. We discuss the history of PHP and its frameworks to understand how this dependence has evolved. The focus will be on providing concrete tips and strategies to reduce reliance on these frameworks, based on real-world examples and practical considerations. The goal is to equip developers with the skills and knowledge to create more flexible and future-proof web applications. We'll explore the importance of maintaining autonomy in a rapidly changing tech landscape and how to make informed decisions in PHP development.
This talk is aimed at encouraging a more independent approach to using PHP frameworks, moving towards a more flexible and future-proof approach to PHP development.
Connector Corner: Automate dynamic content and events by pushing a buttonDianaGray10
Here is something new! In our next Connector Corner webinar, we will demonstrate how you can use a single workflow to:
Create a campaign using Mailchimp with merge tags/fields
Send an interactive Slack channel message (using buttons)
Have the message received by managers and peers along with a test email for review
But there’s more:
In a second workflow supporting the same use case, you’ll see:
Your campaign sent to target colleagues for approval
If the “Approve” button is clicked, a Jira/Zendesk ticket is created for the marketing design team
But—if the “Reject” button is pushed, colleagues will be alerted via Slack message
Join us to learn more about this new, human-in-the-loop capability, brought to you by Integration Service connectors.
And...
Speakers:
Akshay Agnihotri, Product Manager
Charlie Greenberg, Host
Essentials of Automations: Optimizing FME Workflows with ParametersSafe Software
Are you looking to streamline your workflows and boost your projects’ efficiency? Do you find yourself searching for ways to add flexibility and control over your FME workflows? If so, you’re in the right place.
Join us for an insightful dive into the world of FME parameters, a critical element in optimizing workflow efficiency. This webinar marks the beginning of our three-part “Essentials of Automation” series. This first webinar is designed to equip you with the knowledge and skills to utilize parameters effectively: enhancing the flexibility, maintainability, and user control of your FME projects.
Here’s what you’ll gain:
- Essentials of FME Parameters: Understand the pivotal role of parameters, including Reader/Writer, Transformer, User, and FME Flow categories. Discover how they are the key to unlocking automation and optimization within your workflows.
- Practical Applications in FME Form: Delve into key user parameter types including choice, connections, and file URLs. Allow users to control how a workflow runs, making your workflows more reusable. Learn to import values and deliver the best user experience for your workflows while enhancing accuracy.
- Optimization Strategies in FME Flow: Explore the creation and strategic deployment of parameters in FME Flow, including the use of deployment and geometry parameters, to maximize workflow efficiency.
- Pro Tips for Success: Gain insights on parameterizing connections and leveraging new features like Conditional Visibility for clarity and simplicity.
We’ll wrap up with a glimpse into future webinars, followed by a Q&A session to address your specific questions surrounding this topic.
Don’t miss this opportunity to elevate your FME expertise and drive your projects to new heights of efficiency.
Let's dive deeper into the world of ODC! Ricardo Alves (OutSystems) will join us to tell all about the new Data Fabric. After that, Sezen de Bruijn (OutSystems) will get into the details on how to best design a sturdy architecture within ODC.
DevOps and Testing slides at DASA ConnectKari Kakkonen
My and Rik Marselis slides at 30.5.2024 DASA Connect conference. We discuss about what is testing, then what is agile testing and finally what is Testing in DevOps. Finally we had lovely workshop with the participants trying to find out different ways to think about quality and testing in different parts of the DevOps infinity loop.
Software Delivery At the Speed of AI: Inflectra Invests In AI-Powered QualityInflectra
In this insightful webinar, Inflectra explores how artificial intelligence (AI) is transforming software development and testing. Discover how AI-powered tools are revolutionizing every stage of the software development lifecycle (SDLC), from design and prototyping to testing, deployment, and monitoring.
Learn about:
• The Future of Testing: How AI is shifting testing towards verification, analysis, and higher-level skills, while reducing repetitive tasks.
• Test Automation: How AI-powered test case generation, optimization, and self-healing tests are making testing more efficient and effective.
• Visual Testing: Explore the emerging capabilities of AI in visual testing and how it's set to revolutionize UI verification.
• Inflectra's AI Solutions: See demonstrations of Inflectra's cutting-edge AI tools like the ChatGPT plugin and Azure Open AI platform, designed to streamline your testing process.
Whether you're a developer, tester, or QA professional, this webinar will give you valuable insights into how AI is shaping the future of software delivery.
"Impact of front-end architecture on development cost", Viktor TurskyiFwdays
I have heard many times that architecture is not important for the front-end. Also, many times I have seen how developers implement features on the front-end just following the standard rules for a framework and think that this is enough to successfully launch the project, and then the project fails. How to prevent this and what approach to choose? I have launched dozens of complex projects and during the talk we will analyze which approaches have worked for me and which have not.
Builder.ai Founder Sachin Dev Duggal's Strategic Approach to Create an Innova...Ramesh Iyer
In today's fast-changing business world, Companies that adapt and embrace new ideas often need help to keep up with the competition. However, fostering a culture of innovation takes much work. It takes vision, leadership and willingness to take risks in the right proportion. Sachin Dev Duggal, co-founder of Builder.ai, has perfected the art of this balance, creating a company culture where creativity and growth are nurtured at each stage.
Key Trends Shaping the Future of Infrastructure.pdfCheryl Hung
Keynote at DIGIT West Expo, Glasgow on 29 May 2024.
Cheryl Hung, ochery.com
Sr Director, Infrastructure Ecosystem, Arm.
The key trends across hardware, cloud and open-source; exploring how these areas are likely to mature and develop over the short and long-term, and then considering how organisations can position themselves to adapt and thrive.
Kubernetes & AI - Beauty and the Beast !?! @KCD Istanbul 2024Tobias Schneck
As AI technology is pushing into IT I was wondering myself, as an “infrastructure container kubernetes guy”, how get this fancy AI technology get managed from an infrastructure operational view? Is it possible to apply our lovely cloud native principals as well? What benefit’s both technologies could bring to each other?
Let me take this questions and provide you a short journey through existing deployment models and use cases for AI software. On practical examples, we discuss what cloud/on-premise strategy we may need for applying it to our own infrastructure to get it to work from an enterprise perspective. I want to give an overview about infrastructure requirements and technologies, what could be beneficial or limiting your AI use cases in an enterprise environment. An interactive Demo will give you some insides, what approaches I got already working for real.
Kubernetes & AI - Beauty and the Beast !?! @KCD Istanbul 2024
J012315560
1. IOSR Journal of Mechanical and Civil Engineering (IOSR-JMCE)
e-ISSN: 2278-1684,p-ISSN: 2320-334X, Volume 12, Issue 3 Ver. I (May. - Jun. 2015), PP 55-60
www.iosrjournals.org
DOI: 10.9790/1684-12315560 www.iosrjournals.org 55 | Page
A study on the Non Destructive Strength parameters of High
Strength Concrete and subsequently formulating an equation
Subhro Chakraborty1
, Dr. Samaresh Pan2
, Pallab Mukherjee3
, Soumen
Pradhan4
Sohan Pradhan5
1
(Assistant Professor, University Of Engineering And Management, Jaipur, India)
2
(Asst. Professor,Narula Institute Of Technology,West Bengal University Of Technology, India)
3
(3rd
Year BTech, Civil Engineering Undergraduate Student, University Of Engineering And Management)
4
(3rd
Year BTech, Civil Engineering Undergraduate Student, University Of Engineering And Management)
5
(3rd
Year BTech, Civil Engineering Undergraduate Student, University Of Engineering And Management)
Abstract: Concrete production exists around the globe and is one of the leading construction material,
essentially man made stone that has become a most versatile and universally recognised tool to build with.
Concrete is a widely used structural material which essentially consists of a binder and a mineral filler. It has
the unique distinction of being the only construction material which is manufactured actually on the site,
whereas other materials are merely shaped and fabricated and eventually assembled at site. Ever since the time
of Romans, there has been a continuous effort by the research workers in the field of cement and concrete
technology to produce better quality cement resulting in concretes of overall improved quality. The introduction
of reinforced concrete as an alternative to steel construction, in the beginning of 20th century, necessitated the
developement and use of low and medium strength concretes. In keeping with the demands of the nuclear age,
high density concrete has been successfully used for the radiation shielding of highly active nuclear reactors.
Considerable progress has been achieved in the design and use of structural light weight concretes, which have
the dual advantage of reduced density coupled with increased thermal insulation. With the present state of
knowledge in the field of concrete mix design, it is possible to select and design concrete capable of resisting
heat, sea water, frost and chemical attack arising out of industrial effluents.
High strength and high performance concrete are being widely used throughout the globe and in the production
of these concretes it is necessary to reduce the water/binder ratio with the subsequent increase in the binder
content. High strength concrete refers to good abrasion, impact and cavitation resistance. The deterioration and
premature failure of concrete structures such as marine structures, concrete bridge deck etc. has lead to the
developement of high performance concrete. The high performance concrete is defined as the high-tech concrete
whose properties have been altered to satisfy specific engineering properties such as high workability, very high
strength, high toughness and high durability to severe exposure condition.
Nowadays silica fume is almost invariably used in the production of High Performance Concretes. In future,
high range water reducing admixtures (Superplasticizers) will open up new possibilities for the use of such
material as partial replacement of cement to produce and develop high strength concrete, as some of them are
much finer than cement. The existing literature is rich in information on silica fume concrete and after
performing a detail review of the research papers published over the last two decades, the objective of the
present study was framed.
Keywords: High strength concrete, silica fume, water binder ratio, compressive strength, mix proportions etc.
I. Introduction
Non-destructive testing is often used to determine/ assess the uniformity and quality of concrete cast
both in laboratory and site. Rebound hammer test and ultrasonic pulse velocity measurement are the basic tools
adopted by researchers to relate different concrete properties with the said test parameters. In the investigation
16 concrete mixes have been tested for USPV and Rebound hammer values at 28 days age as per IS 13311 (Part
I and II). For measuring those values five samples (IS 150 mm cubes) were used for each mixes. The concrete
cube specimens are held in a compression testing machine under a fixed load, measurements of rebound
number taken and then the compressive strength determined as per IS 516 : 1959. The fixed load required
is of the order of 7 N/mm2
when the impact energy of the hammer is about 2.2 Nm. It is also pertinent to
note that samples were dried prior to testing. Average values of those measured parameters are shown in Table.
II. Effect Of Silica Fume Replacement On Rebound Indices:
Figure 01shows the variation in rebound indices value with respect to silica fume replacement
percentages @ 0, 5, 10 and 15%. Maximum and minimum values of rebound indices for control concrete have
2. A study on the Non Destructive Strength parameters of High Strength Concrete and ….
DOI: 10.9790/1684-12315560 www.iosrjournals.org 56 | Page
been obtained as 47 and 33 respectively at 0.30 and 0.42 w/cm values. For silica fume mixes maximum and
minimum values are 61 and 37 respectively. In general it is observed that as the silica fume percentage increases
rebound values also increases. This trend is similar to that of compressive strength. All the values are exceeding
30 which signify that all concrete mixes conform to good quality as per IS 13311 part II.
Table: Rebound Indices and Ultrasonic Pulse Velocity Results at 28 days:
Mix ID: Rebound Value: USPV (Km/sec)
AE 0 47 5.21
AE 05 55 5.34
AE 10 61 5.39
AE 15 54 5.28
AF 0 40 5.19
AF 05 51 5.21
AF 10 56 5.24
AF 15 52 5.14
AG 0 36 4.95
AG 05 41 4.99
AG 10 47 5.04
AG 15 45 5.01
AH 0 33 4.88
AH 05 35 4.91
AH 10 39 4.97
AH 15 37 4.89
Fig 01: The relationship between rebound number and silica fume replacement percentages
III. Strength Relationship For Silica Fume Concrete Using Rebound Indices:
In order to derive relationship between strength and rebound numbers, regression analysis has been performed
using the present data base. After analysis, an exponential expression has been found to be the highly efficient
which is as follows:
For control mixes, S28=18.341 x e0.025N
For silica fume mixes, S28=25.969 x e0.017N
These expressions have been shown in figures 02 and 03.
In the present investigation the value of co relation coefficient (r) is quite high indicating the efficacy
of the said models. The value of r for control mixes and silica fume mixes are 0.984 and 0.987 respectively. The
accuracy of prediction using the above equations lies ±15% of the actual values. As such, the estimation of
strength of concrete by rebound hammer method cannot be held to be very accurate and probable
accuracy of prediction of concrete strength in a structure is ± 25 percent (IS 13311 part II).
0 5 10 15
Silica Fume Replacement Percentage
30
40
50
60
ReboundNumberat28days
w/cm=0.30, Binder=525 Kg/cum
w/cm=0.34, Binder=525 Kg/cum
w/cm=0.38, Binder=525 Kg/cum
w/cm=0.42, Binder=525 Kg/cum
3. A study on the Non Destructive Strength parameters of High Strength Concrete and ….
DOI: 10.9790/1684-12315560 www.iosrjournals.org 57 | Page
The expressions for control as well as fly ash mixes are almost identical with some variation. This means that
silica fume mixes follows the same trend as that of control while strength needs to be predicted using rebound
values.
From the figure it is noticed that beyond rebound value of approximately 30-35 strength increases
significantly with increase in rebound values. This indicates that strength prediction of high strength concrete is
highly sensitive to change in rebound indices.
Fig 02: The Relationship between rebound number and compressive strength for control mixes.
Fig 03: The Relationship between rebound number and compressive strength for silica fume mixes.
IV. Effect Of Silica Fume Replacement On Uspv Values:
Relationship between uspv and fly ash replacement percentages is presented in figure 04. From the
figure it is seen that with increasing silica fume replacement percentages uspv values have increased. Maximum
and minimum values of uspv values for control concrete have been obtained as 5.21 and 4.88 km/sec
respectively at 0.30 and 0.42 w/cm values. For silica fume mixes maximum and minimum values are 5.39 and
S = 1.78525014
r = 0.98377177
Rebound Number (N)
CompressiveStrengthat28days(MPa)
30.0 35.0 40.0 45.0 50.040.00
45.00
50.00
55.00
60.00
65.00
S = 1.43741121
r = 0.98730036
Rebound Number (N)
CompressiveStrengthat28days(Mpa)
30.0 35.0 40.0 45.0 50.0 55.0 60.0 65.040.00
45.00
50.00
55.00
60.00
65.00
70.00
75.00
80.00
4. A study on the Non Destructive Strength parameters of High Strength Concrete and ….
DOI: 10.9790/1684-12315560 www.iosrjournals.org 58 | Page
4.89 km/sec respectively. In the present investigation all the values are exceeding 4.5 km/sec satisfying
excellent quality grading as per IS 13311 Part I.
Fig 04: The relationship between uspv and silica fume replacement percentage
V. Strength Relationship For Silica Fume Concrete Using Uspv Values:
Figure 05 and 06 shows the variation in 28 days compressive strength with respect to USPV values at
different silica fume replacement percentages @ 0, 5, 10 and 15%. In general it is observed that as USPV
increases, Strength increases.
In order to derive relationship between strength and uspv values, regression analysis has been
performed using the present data base after analysis, a reciprocal model expression has been found to be the
highly efficient which is as follows and the value of co relation coefficient (r) of control and silica fume mixes
are 0.956 and 0.935 respectively.
For control mixes: 28
1
0.0192 0.1173
S
x
For silica fume mixes: 28
1
0.0127 0.0822
S
x
The values of co relation coefficient (r) are quite high indicating the efficacy of the said models. The
expressions for control as well as fly ash mixes are almost identical with some variations. This means that silica
fume concrete mix follows the same trend as that of control while strength needs to be predicted using uspv
values.
0 5 10 15
Silica Fume Replacement Percentage
4.80
5.00
5.20
5.40
5.60
5.80
USPV(Km/sec)
w/cm=0.30,Binder=525 Kg/cum
w/cm=0.34,Binder=525 Kg/cum
w/cm=0.38,Binder=525 Kg/cum
w/cm=0.42,Binder=525 Kg/cum
5. A study on the Non Destructive Strength parameters of High Strength Concrete and ….
DOI: 10.9790/1684-12315560 www.iosrjournals.org 59 | Page
Fig 05: The relationship between compressive strength and uspv for control mixes.
Fig 06: The relationship between compressive strength and uspv for silica fume mixes:
VI. Conclusion:
From the results of the present investigation, the following conclusions may be drawn –
As the strength increases, rebound value also increases.
For silica fume mixes, rebound hammer number varied from 37 to 61 at 28 days for strength varying
between 49 and 76 Mpa.
As the silica fume percentage increases rebound values increases. However at 15% replacement level, the
rebound value decreases marginally due to reduction in strength.
An exponential equation between compressive strength and rebound number has been obtained for silica
fume mixes.
The USPV values varied from 4.89 to 5.39 km/sec at 28 day for silica fume concretes.
S = 2.90614777
r = 0.95639424
USPV (Km/sec)
CompressiveStrengthat28days(MPa)
4.8 4.9 5.0 5.0 5.1 5.2 5.240.00
45.00
50.00
55.00
60.00
65.00
S = 3.18898848
r = 0.93583007
USPV (Km/sec)
CompressiveStrengthat28Days(MPa)
4.7 4.8 4.9 5.0 5.1 5.2 5.3 5.4 5.540.00
45.00
50.00
55.00
60.00
65.00
70.00
75.00
80.00
6. A study on the Non Destructive Strength parameters of High Strength Concrete and ….
DOI: 10.9790/1684-12315560 www.iosrjournals.org 60 | Page
As silica fume content increases, uspv values increases up to 10% silica fume replacement percentage.
However at 15% level, the corrresponding uspv value decreases marginally.
It is observed that as USPV increases, strength increases.
For silica fume mixes a reciprocal equation between strength and uspv values has been achieved.
Acknowledgement:
The authors are thankful to the Mani Group for the supply of high quality Micro Silica from Elkem
India Pvt Limited. Also our sincere gratitude to Fosroc Chemicals for providing us high performance
superplasticizers named conplast sp-430.
References:
[1]. N.K.Amudhavalli et.al; "Effect of silica fume on strength and durability parameters of concrete", International Journal Of
Engineering Science And Emerging Technologies, August 2012.
[2]. V. Bhikshma et al.,"Investigations on mechanical properties of high strength silica fume concrete", Asian Journal Of Civil
Engineering, 2009).
[3]. P. Ratish Kumar; "High performance silica fume mortars"; Architecture and civil engineering Vol-8,2010.
[4]. K.C.Biswal et al.;"Effect of superplasticizer and silica fume on the properties of concrete", Conference Trivandrum Kerala, March
16th 2011.
[5]. Mohammad Panjehpour et al.; "A Review for characterization of silica fume and its effect on concrete properties"; Sadhana;
International journal of Sustainable Construction Engineering And Technology,Dec 2011.