This document reports on an experimental study that investigated the effect of nano silica on the split tensile strength of concrete. Concrete samples were produced by replacing 0-3% of cement with nano silica. Testing found that split tensile strength increased up to 3% nano silica replacement, with the highest strength achieved with 3% replacement. Workability also increased up to 2.5% replacement before decreasing. The study concluded that nano silica improves split tensile strength by altering the microstructure of concrete and that maximum strength is achieved with 3% cement replacement by nano silica.
EFFECT OF NANO-SILICA ON CONCRETE CONTAINING METAKAOLINIAEME Publication
In this paper the results of an experimental investigation on the use of Metakaolin (MK) and Nano-Silica (NS) on various properties of concrete are presented. Metakaolin and Nano-Silica are used as partial replacement of cement for the preparation of concrete. In the present investigation initially cement is partially replaced by Metakaolin 5% and 10% by weight. Further investigation is carried out by combined replacement of Metakaolin at 5% and 10% with Nano-Silica at 1%, 2% and 3% by weight of cement. For structural applications the various properties, such as compressive strength, split tensile strength, modulus of elasticity and flexural strength of M25 grade concrete containing MK and NS are evaluated and the results are compared with the controlled concrete. Based on the test results, it can be observed that concrete prepared with a combination of 5% MK and 2% NS indicated increased strength compared to the controlled concrete.
STUDY AND PERFORMANCE OF HIGH STRENGTH CONCRETE USING WITH NANO SILICA AND SI...IAEME Publication
Concrete is the most com monly used material in various types of construction, from the flooring of a hut to a multi storied high rise structure from pathway to an airport runway, from an underground tunnel and deep sea platform to high-rise chimneys and TV Towers. In the last millennium concrete
has demanding requirements both in terms of technical performance and economy while greatly varying from architectural masterpieces to the simplest of utilities. It is difficult to point out another material of construction which is
as versatile as concrete. Concrete is one of the versatile heterogeneous materials, civil engineering has ever known. With the advent of concrete civil engineering has touched highest peak of technology.
The Coupled Effect of Nano Silica and Superplasticizer on Concrete Fresh and ...IJMER
The The effect of individual and combined additions of both nano silica (NS) and
polycarboxylate-ether superplasticizer (SP) admixtures on concrete mixes were studied. Twenty concrete
mixes were prepared, keeping the water/cement ratio constant at w/c = 0.40, with different amounts of
SP admixture, and NS. the superplasticizer was studied in the range of (0 – 0.88)% (over cement weight),
nano silica additions were tested at (0 – 3.00)% range (over cement weight). Early, and late
compressive strengths, as well as results of fresh concrete (slump) test of formulations were evaluated by
means of design of experiments, in order to identify the primary factors and their interactions on the
measured properties. The most desirable NS and SP % were determined. The results showed that
regardless of the used NS percentage, the higher compressive strength results were reached at, or
around SP observed saturation dosage (0.66% by weight cement). The statistical approach applied here
enabled to develop relations, which could adequately describe the dependency of both the compressive
strength, and slump on the composition of NS, and SP concretes. These relations were presented as
contour plots, which from a practical point of view could serve as a basis for mix design
Hence, it can be concluded concrete prepared with 3% NS and 6%
SF combination can be recommended for the structural applications. The increase in the strength
properties of concrete is due to the availability of additional binder in the presence of NS and SF.
The improved durability property of concrete is due to proper packing of NS and SF particles results
in reduction in voids and leading to dense concrete.
EFFECT OF NANO-SILICA ON CONCRETE CONTAINING METAKAOLINIAEME Publication
In this paper the results of an experimental investigation on the use of Metakaolin (MK) and Nano-Silica (NS) on various properties of concrete are presented. Metakaolin and Nano-Silica are used as partial replacement of cement for the preparation of concrete. In the present investigation initially cement is partially replaced by Metakaolin 5% and 10% by weight. Further investigation is carried out by combined replacement of Metakaolin at 5% and 10% with Nano-Silica at 1%, 2% and 3% by weight of cement. For structural applications the various properties, such as compressive strength, split tensile strength, modulus of elasticity and flexural strength of M25 grade concrete containing MK and NS are evaluated and the results are compared with the controlled concrete. Based on the test results, it can be observed that concrete prepared with a combination of 5% MK and 2% NS indicated increased strength compared to the controlled concrete.
STUDY AND PERFORMANCE OF HIGH STRENGTH CONCRETE USING WITH NANO SILICA AND SI...IAEME Publication
Concrete is the most com monly used material in various types of construction, from the flooring of a hut to a multi storied high rise structure from pathway to an airport runway, from an underground tunnel and deep sea platform to high-rise chimneys and TV Towers. In the last millennium concrete
has demanding requirements both in terms of technical performance and economy while greatly varying from architectural masterpieces to the simplest of utilities. It is difficult to point out another material of construction which is
as versatile as concrete. Concrete is one of the versatile heterogeneous materials, civil engineering has ever known. With the advent of concrete civil engineering has touched highest peak of technology.
The Coupled Effect of Nano Silica and Superplasticizer on Concrete Fresh and ...IJMER
The The effect of individual and combined additions of both nano silica (NS) and
polycarboxylate-ether superplasticizer (SP) admixtures on concrete mixes were studied. Twenty concrete
mixes were prepared, keeping the water/cement ratio constant at w/c = 0.40, with different amounts of
SP admixture, and NS. the superplasticizer was studied in the range of (0 – 0.88)% (over cement weight),
nano silica additions were tested at (0 – 3.00)% range (over cement weight). Early, and late
compressive strengths, as well as results of fresh concrete (slump) test of formulations were evaluated by
means of design of experiments, in order to identify the primary factors and their interactions on the
measured properties. The most desirable NS and SP % were determined. The results showed that
regardless of the used NS percentage, the higher compressive strength results were reached at, or
around SP observed saturation dosage (0.66% by weight cement). The statistical approach applied here
enabled to develop relations, which could adequately describe the dependency of both the compressive
strength, and slump on the composition of NS, and SP concretes. These relations were presented as
contour plots, which from a practical point of view could serve as a basis for mix design
Hence, it can be concluded concrete prepared with 3% NS and 6%
SF combination can be recommended for the structural applications. The increase in the strength
properties of concrete is due to the availability of additional binder in the presence of NS and SF.
The improved durability property of concrete is due to proper packing of NS and SF particles results
in reduction in voids and leading to dense concrete.
Effect of Nano Silica on the Compressive Strength of Concreteijtsrd
Concrete is one of the most important materials in the construction world. In the present scenario, due to the various industrialization, especially in the urban areas, the demand of construction work increases progressively. Due to which there is very high demand of concrete. So, it is very important to improve the durability and properties of concrete. For this there are various admixtures which are partially replaced with the cement like fly ash, slag, silica fumes, rice husk etc. However, in the present situation, Nano technology comes as a very faithful approach for improving the strength and durability of the concrete. In this project, M30 concrete is used and we use Nano silica of size 236nm as a partial replacement in concrete. Nano silica enters into the pores of the concrete and sets early due to which the permeability and strength of concrete are improved. An experimental analysis has been done by replacing the cement with Nano silica by increasing its percentage as 0.5 , 1 , 2 and 3 b.w.c. The results show that with increase in amount of Nano silica, the compressive strength increases up to 3 , however, if amount of Nano silica goes beyond 3 , the compressive strength of concrete starts decreasing. In these experimental tests, there are 10 cubes prepared with the sample and tested at 7 and 28 days. Bhupender | Sunil Kumar | Vikram "Effect of Nano Silica on the Compressive Strength of Concrete" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-3 | Issue-6 , October 2019, URL: https://www.ijtsrd.com/papers/ijtsrd28090.pdf Paper URL: https://www.ijtsrd.com/engineering/civil-engineering/28090/effect-of-nano-silica-on-the-compressive-strength-of-concrete/bhupender
EFFECT OF STEEL AND POLYPROPYLENE FIBER ON MECHANICAL PROPERTIES OF CONCRETEIAEME Publication
This experimental work describes the mechanical properties of Hybrid Fibre Reinforced concrete(HFRC).HFRC is prepared by adding any two fibres to the conventional concrete to make it a composite mixture and that derives benefits from each of the added fibre and exhibits significant response. The fibres which are used in the present experimental work is steel fibres and polypropylene fibres. Here the polypropylene fibres helps in resists initial cracks and shrinkage ,steel fibres helps in increase the strength of concrete. In present work M30 grade of concrete can be prepared according to the IS 10262:2009 reference code. these steel and polypropylene fibres are added by 50% each with different hybridization from 0% to 1.5%.For calculating strength parameters specimens are casted and cured for 28 days and tested in the lab for Compressive Test, Tensile Test, Flexural test. From the present investigation the strength parameter increases with the percentage of increase in fibre. Therefore here the hybrid ratio of 1.5% gives the more result when compared to other hybrid ratio.
Comparatives study of M20 grade conventional concrete pavement with M20 grade...IJSRD
This project work involves an experimental and laboratory study of the Polypropylene fibers with two types of admixtures those are Quarry dust and Fly ash on the mechanical properties of the concrete used in the rigid pavement. In this experimental study involves two types of concrete mixes were prepared individually. Polypropylene fiber of 1% to 3% with Quarry dust of 0.1% to 0.3% and Polypropylene fiber of 1% to 4% with Fly ash of 0.1% to 0.4% by weight of cement were added to the mixes. After that a comparative analysis has been carried out for conventional concrete to that of the fiber reinforced in relation to their compressive, split tensile and flexural properties. By the experimental work the compressive, split tensile and flexural strengths are proportionally increased both Polypropylene + Quarry dust and Polypropylene +Fly ash usage. It is observed that the optimum dosages of Polypropylene + Quarry dust is 3% + 0.3% Polypropylene +Fly ash is 4%+ 0.4% by weight of cement. In this project cost analysis is also determined for conventional concrete and fiber reinforced with admixtures individually using experimental test reports. By analyzing the cost it was found that Polypropylene reinforced concrete with quarry dust pavement is economical than Polypropylene reinforced concrete with Fly ash pavement.
Effect of Nano Silica on the Compressive Strength of Concreteijtsrd
Concrete is one of the most important materials in the construction world. In the present scenario, due to the various industrialization, especially in the urban areas, the demand of construction work increases progressively. Due to which there is very high demand of concrete. So, it is very important to improve the durability and properties of concrete. For this there are various admixtures which are partially replaced with the cement like fly ash, slag, silica fumes, rice husk etc. However, in the present situation, Nano technology comes as a very faithful approach for improving the strength and durability of the concrete. In this project, M30 concrete is used and we use Nano silica of size 236nm as a partial replacement in concrete. Nano silica enters into the pores of the concrete and sets early due to which the permeability and strength of concrete are improved. An experimental analysis has been done by replacing the cement with Nano silica by increasing its percentage as 0.5 , 1 , 2 and 3 b.w.c. The results show that with increase in amount of Nano silica, the compressive strength increases up to 3 , however, if amount of Nano silica goes beyond 3 , the compressive strength of concrete starts decreasing. In these experimental tests, there are 10 cubes prepared with the sample and tested at 7 and 28 days. Bhupender | Sunil Kumar | Vikram "Effect of Nano Silica on the Compressive Strength of Concrete" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-3 | Issue-6 , October 2019, URL: https://www.ijtsrd.com/papers/ijtsrd28090.pdf Paper URL: https://www.ijtsrd.com/engineering/civil-engineering/28090/effect-of-nano-silica-on-the-compressive-strength-of-concrete/bhupender
EFFECT OF STEEL AND POLYPROPYLENE FIBER ON MECHANICAL PROPERTIES OF CONCRETEIAEME Publication
This experimental work describes the mechanical properties of Hybrid Fibre Reinforced concrete(HFRC).HFRC is prepared by adding any two fibres to the conventional concrete to make it a composite mixture and that derives benefits from each of the added fibre and exhibits significant response. The fibres which are used in the present experimental work is steel fibres and polypropylene fibres. Here the polypropylene fibres helps in resists initial cracks and shrinkage ,steel fibres helps in increase the strength of concrete. In present work M30 grade of concrete can be prepared according to the IS 10262:2009 reference code. these steel and polypropylene fibres are added by 50% each with different hybridization from 0% to 1.5%.For calculating strength parameters specimens are casted and cured for 28 days and tested in the lab for Compressive Test, Tensile Test, Flexural test. From the present investigation the strength parameter increases with the percentage of increase in fibre. Therefore here the hybrid ratio of 1.5% gives the more result when compared to other hybrid ratio.
Comparatives study of M20 grade conventional concrete pavement with M20 grade...IJSRD
This project work involves an experimental and laboratory study of the Polypropylene fibers with two types of admixtures those are Quarry dust and Fly ash on the mechanical properties of the concrete used in the rigid pavement. In this experimental study involves two types of concrete mixes were prepared individually. Polypropylene fiber of 1% to 3% with Quarry dust of 0.1% to 0.3% and Polypropylene fiber of 1% to 4% with Fly ash of 0.1% to 0.4% by weight of cement were added to the mixes. After that a comparative analysis has been carried out for conventional concrete to that of the fiber reinforced in relation to their compressive, split tensile and flexural properties. By the experimental work the compressive, split tensile and flexural strengths are proportionally increased both Polypropylene + Quarry dust and Polypropylene +Fly ash usage. It is observed that the optimum dosages of Polypropylene + Quarry dust is 3% + 0.3% Polypropylene +Fly ash is 4%+ 0.4% by weight of cement. In this project cost analysis is also determined for conventional concrete and fiber reinforced with admixtures individually using experimental test reports. By analyzing the cost it was found that Polypropylene reinforced concrete with quarry dust pavement is economical than Polypropylene reinforced concrete with Fly ash pavement.
EXPERIMENTAL INVESTIGATION ON BEHAVIOUR OF NANO CONCRETEIAEME Publication
The influence of Nano-Silica on various properties of concrete is obtained by replacing the cement with various percentages of Nano-Silica. Nano-Silica is used as a partial replacement for cement in the range of 2.5%, 3%, and 3.5% for M25 mix. Specimens are casted using Nano-Silica concrete. Laboratory tests were conducted to determine the compressive strength, split tensile and flexural strength of Nano-Silica concrete at the age of 7 and 28 days. Results indicate that the concrete, by using Nano-Silica powder, was able to increase its compressive strength. However, the density is reduced compared to standard mix of concrete. The replacement of cement with 3% Nano-Silica results in higher strength and reduction in the permeability than the controlled concrete. The replacement of cement with Nano-Silica more than 3% results in the reduction of various properties of Nano-Silica concrete.
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.
Studies on quarry dust as partial replacement of fine aggregates in concreteIJLT EMAS
Natural sand is most commonly used fine aggregates
in the production of concrete possess the problem of acute
shortage in many areas. Quarry dust can be used as an economic
alternative to the natural sand. In this investigation an attempt is
made to utilize quarry dust as a partial substitute for natural
sand in producing concrete. Natural sand is replaced by Quarry
dust at an interval of 5%, 10%, 15%, 20% and 25%. Mix
proportions for M20 concrete is prepared with reference to IS:
10262-2009 and IS: 456-2000 for the study of workability.
Compressive strength and Flexural strength test results are
compared with the conventional concrete. The strengths were
obtained at the ages of 3, 7 and 28 days. Compressive and
Flexural strength increased marginally from 5% to 15%
replacement. There is a slight decrease in the corresponding
compressive and flexural strength at 20% replacement. Good
correlation was observed between compressive strength and
flexural strength. It was observed that the addition of quarry
dust that would replace the fine material at particular
proportion has displayed an enhancing effect on properties of
concrete. This investigation proves that quarry dust can be used
as a partial substitute for natural sand in preparing concrete.
Applications and Effects of Silica Fume and Nano Silica on the Compressive St...ijtsrd
The application of nanotechnology in concrete adds new content to efforts to improve its performance. Due to the very small size of nanomaterials, the properties of concrete can be influenced by changing the microstructure. The study involved the use of 215 nm nano silica to increase the compressive strength of concrete. Experimental studies were performed at 0.4 , 0.7 and 1 of BC. These tests have greatly improved the strength of the early pressure and the overall pressure strength of the concrete. As the percentage of nano silica increases, an increase in strength is observed. Concrete is the material of present and future. Its widespread use in structures, from buildings to factories, bridges and airports, makes it one of the most searched materials in the 21st century. Due to rapid population explosion and the rise of technology to meet these needs, there is an urgent need to improve the strength and durability of concrete. Among the various materials used in concrete production, cement plays an important role due to its size and adhesive properties. Therefore, for the production of improved concrete, the cement humidification mechanism should be studied properly and better alternatives should be proposed. Current research is the design of M40 M30 quality of concrete. The mixtures developed to obtain more rheological properties and solid properties were studied. In this study, the cement is replaced by silica smoke and nano silica materials. In addition, it is planned to determine the number of predictions of cubes in the program. The current design of the probe is the strength of M40 and M30 quality of concrete. This thesis explore the standard optimization ratio for silica and fume to get the best compressive strength. Further this has to check for Indian standard uses for developing the demand of quality users in India. Finally this research lead us to create the console for evaluating the strength of concrete. Syed Basharat Andrabi | Er. Jagdeep Singh ""Applications and Effects of Silica Fume and Nano Silica on the Compressive Strength of Concrete"" 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/ijtsrd25069.pdf
Paper URL: https://www.ijtsrd.com/engineering/civil-engineering/25069/applications-and-effects-of-silica-fume-and-nano-silica-on-the-compressive-strength-of-concrete/syed-basharat-andrabi
Student information management system project report ii.pdfKamal Acharya
Our project explains about the student management. This project mainly explains the various actions related to student details. This project shows some ease in adding, editing and deleting the student details. It also provides a less time consuming process for viewing, adding, editing and deleting the marks of the students.
Water scarcity is the lack of fresh water resources to meet the standard water demand. There are two type of water scarcity. One is physical. The other is economic water scarcity.
Overview of the fundamental roles in Hydropower generation and the components involved in wider Electrical Engineering.
This paper presents the design and construction of hydroelectric dams from the hydrologist’s survey of the valley before construction, all aspects and involved disciplines, fluid dynamics, structural engineering, generation and mains frequency regulation to the very transmission of power through the network in the United Kingdom.
Author: Robbie Edward Sayers
Collaborators and co editors: Charlie Sims and Connor Healey.
(C) 2024 Robbie E. Sayers
Quality defects in TMT Bars, Possible causes and Potential Solutions.PrashantGoswami42
Maintaining high-quality standards in the production of TMT bars is crucial for ensuring structural integrity in construction. Addressing common defects through careful monitoring, standardized processes, and advanced technology can significantly improve the quality of TMT bars. Continuous training and adherence to quality control measures will also play a pivotal role in minimizing these defects.
Final project report on grocery store management system..pdfKamal Acharya
In today’s fast-changing business environment, it’s extremely important to be able to respond to client needs in the most effective and timely manner. If your customers wish to see your business online and have instant access to your products or services.
Online Grocery Store is an e-commerce website, which retails various grocery products. This project allows viewing various products available enables registered users to purchase desired products instantly using Paytm, UPI payment processor (Instant Pay) and also can place order by using Cash on Delivery (Pay Later) option. This project provides an easy access to Administrators and Managers to view orders placed using Pay Later and Instant Pay options.
In order to develop an e-commerce website, a number of Technologies must be studied and understood. These include multi-tiered architecture, server and client-side scripting techniques, implementation technologies, programming language (such as PHP, HTML, CSS, JavaScript) and MySQL relational databases. This is a project with the objective to develop a basic website where a consumer is provided with a shopping cart website and also to know about the technologies used to develop such a website.
This document will discuss each of the underlying technologies to create and implement an e- commerce website.
CFD Simulation of By-pass Flow in a HRSG module by R&R Consult.pptxR&R Consult
CFD analysis is incredibly effective at solving mysteries and improving the performance of complex systems!
Here's a great example: At a large natural gas-fired power plant, where they use waste heat to generate steam and energy, they were puzzled that their boiler wasn't producing as much steam as expected.
R&R and Tetra Engineering Group Inc. were asked to solve the issue with reduced steam production.
An inspection had shown that a significant amount of hot flue gas was bypassing the boiler tubes, where the heat was supposed to be transferred.
R&R Consult conducted a CFD analysis, which revealed that 6.3% of the flue gas was bypassing the boiler tubes without transferring heat. The analysis also showed that the flue gas was instead being directed along the sides of the boiler and between the modules that were supposed to capture the heat. This was the cause of the reduced performance.
Based on our results, Tetra Engineering installed covering plates to reduce the bypass flow. This improved the boiler's performance and increased electricity production.
It is always satisfying when we can help solve complex challenges like this. Do your systems also need a check-up or optimization? Give us a call!
Work done in cooperation with James Malloy and David Moelling from Tetra Engineering.
More examples of our work https://www.r-r-consult.dk/en/cases-en/
Automobile Management System Project Report.pdfKamal Acharya
The proposed project is developed to manage the automobile in the automobile dealer company. The main module in this project is login, automobile management, customer management, sales, complaints and reports. The first module is the login. The automobile showroom owner should login to the project for usage. The username and password are verified and if it is correct, next form opens. If the username and password are not correct, it shows the error message.
When a customer search for a automobile, if the automobile is available, they will be taken to a page that shows the details of the automobile including automobile name, automobile ID, quantity, price etc. “Automobile Management System” is useful for maintaining automobiles, customers effectively and hence helps for establishing good relation between customer and automobile organization. It contains various customized modules for effectively maintaining automobiles and stock information accurately and safely.
When the automobile is sold to the customer, stock will be reduced automatically. When a new purchase is made, stock will be increased automatically. While selecting automobiles for sale, the proposed software will automatically check for total number of available stock of that particular item, if the total stock of that particular item is less than 5, software will notify the user to purchase the particular item.
Also when the user tries to sale items which are not in stock, the system will prompt the user that the stock is not enough. Customers of this system can search for a automobile; can purchase a automobile easily by selecting fast. On the other hand the stock of automobiles can be maintained perfectly by the automobile shop manager overcoming the drawbacks of existing system.
Democratizing Fuzzing at Scale by Abhishek Aryaabh.arya
Presented at NUS: Fuzzing and Software Security Summer School 2024
This keynote talks about the democratization of fuzzing at scale, highlighting the collaboration between open source communities, academia, and industry to advance the field of fuzzing. It delves into the history of fuzzing, the development of scalable fuzzing platforms, and the empowerment of community-driven research. The talk will further discuss recent advancements leveraging AI/ML and offer insights into the future evolution of the fuzzing landscape.