Admixtures are added in concrete to improve the quality of concrete.
Fly ash (FA), silica fume (SF), ground granulated blast furnace slag (GGBS), Metakaolin (MK), and rice husk ash (RHA)
Possess certain characteristics through which they influence the properties of concrete differently.
Effect of mineral admixtures on the properties of fresh concrete is very important as these properties may affect the durability and mechanical properties of concrete.
Admixtures are added in concrete to improve the quality of concrete.
Fly ash (FA), silica fume (SF), ground granulated blast furnace slag (GGBS), Metakaolin (MK), and rice husk ash (RHA)
Possess certain characteristics through which they influence the properties of concrete differently.
Effect of mineral admixtures on the properties of fresh concrete is very important as these properties may affect the durability and mechanical properties of concrete.
what is polymer concrete, types, properties, material used in manufacturing process , manufacturing process, applications and their advantages. case study on polymer composite concrete.
Quality Control in Concrete and Durability factors : An overviewbybyRAJESH PRASAD,IRSE, CPM/M, RVNL. KOLKATA. An interesting and informative presentation....
Strength and durability of concrete - Repair and rehabilitation of structures...Shanmugasundaram N
Quality assurance for concrete – Strength, Durability and Thermal properties, of concrete - Cracks, different types, causes – Effects due to climate, temperature, Sustained elevated temperature, Corrosion - Effects of cover thickness.
Concrete is the most widely used construction material in India with annual consumption exceeding 100 million cubic meters.
High performance concrete is a concrete in which certain characteristics are developed for a particular application and environment, so that it will give excellent performance in the structure in which it will be placed.
A high-strength concrete is always a high performance concrete, but a high-performance concrete is not always a high-strength concrete.
Concrete Maturity | Estimating the Real-Time Concrete StrengthAali R. Alizadeh
The strength monitoring of concrete in the job site is a critical step in the optimization of important operations such as formwork removal, opening traffic on the concrete pavement, post-tensioning, concrete curing, and application of load of concrete elements during construction.
Currently, field-cured cylindrical specimens or CIPPOC samples are cast on most of the job site and are tested in laboratory at various times to monitor strength. This is a relatively inefficient method as it provides delayed results and could be prone to errors as usually one field-cured specimen is tested.
To obtain real-time concrete strength results, a standardized alternative based on the maturity concept has been widely used in the concrete industry. According to the ASTM C1074, the temperature history of concrete is recorded after pouring and using a calibration curve, this information is used to estimate the strength of concrete on the job site.
In this presentation, the concept and measurement techniques of concrete maturity are discussed. You can also watch the video version of this presentation in the following link: http://www.giatecscientific.com/knowledge-center/concrete-news/video-what-is-concrete-maturity/
what is polymer concrete, types, properties, material used in manufacturing process , manufacturing process, applications and their advantages. case study on polymer composite concrete.
Quality Control in Concrete and Durability factors : An overviewbybyRAJESH PRASAD,IRSE, CPM/M, RVNL. KOLKATA. An interesting and informative presentation....
Strength and durability of concrete - Repair and rehabilitation of structures...Shanmugasundaram N
Quality assurance for concrete – Strength, Durability and Thermal properties, of concrete - Cracks, different types, causes – Effects due to climate, temperature, Sustained elevated temperature, Corrosion - Effects of cover thickness.
Concrete is the most widely used construction material in India with annual consumption exceeding 100 million cubic meters.
High performance concrete is a concrete in which certain characteristics are developed for a particular application and environment, so that it will give excellent performance in the structure in which it will be placed.
A high-strength concrete is always a high performance concrete, but a high-performance concrete is not always a high-strength concrete.
Concrete Maturity | Estimating the Real-Time Concrete StrengthAali R. Alizadeh
The strength monitoring of concrete in the job site is a critical step in the optimization of important operations such as formwork removal, opening traffic on the concrete pavement, post-tensioning, concrete curing, and application of load of concrete elements during construction.
Currently, field-cured cylindrical specimens or CIPPOC samples are cast on most of the job site and are tested in laboratory at various times to monitor strength. This is a relatively inefficient method as it provides delayed results and could be prone to errors as usually one field-cured specimen is tested.
To obtain real-time concrete strength results, a standardized alternative based on the maturity concept has been widely used in the concrete industry. According to the ASTM C1074, the temperature history of concrete is recorded after pouring and using a calibration curve, this information is used to estimate the strength of concrete on the job site.
In this presentation, the concept and measurement techniques of concrete maturity are discussed. You can also watch the video version of this presentation in the following link: http://www.giatecscientific.com/knowledge-center/concrete-news/video-what-is-concrete-maturity/
Use of chemical admixtures and mineral additives in various kinds of high performance and high strength concrete is essential. I have explained how it works.
Properties of Fresh and Hardened ConcreteRishabh Lala
Properties of Fresh (Workability)
Hardened Concrete (Workability,Permiablitiy,Durablility)
Thermal properties
Micro-cracking of concrete
Mix Design
Rheology
Causes of Damage of Concrete
At Kshitij Financial Services we have introduced a product My Investment Bank.
It's an investment product to accumulate savings for child’s future while teaching them to save & manage money.
This power point presentation gives you information about the various chemicals, admixtures used to repair members and improve the properties of concrete. it gives you information about the various types of concrete. it gives you information about the various methods of repair.
This presentation has been prepared by civil engineering students of Tolani Foundation Gandhidham Polytechnic:
DHAWANI LAVISH
GAYAKWAD TEJAS
GORASIYA MAYUR
HIRANI YATIN
KATARMAL DARSHAN
LALWANI PIYUSH
MALI VISHNU
PATEL PARTH
PRAJAPATI JAYESH
PRAJAPATI KALPESH
Thank You!!
admixture
TYPES OF ADMIXTURE
CHEMICAL ADMIXTURE
AIR ENTERINERS
WATER REDUCERS
SET RETARDERS
SET ACCELERATORS
SUPERPLASTICIZER
MINERAL ADMIXTURE
FLY ASH
SILICA FLUMES
SLAG
FUNCTION OF ADMIXTURE
ADVANTAGES OF ADMIXTURE
vedio link
https://youtu.be/HJzgwpquo7w
Introduction to admixtures. Standard code definition of admixtures and additives. Various types of admixtures and additives along with their properties. Mechanism for working of admixtures and additives. Effect of admixtures of properties of concrete.
Admixtures in concrete/Types of admixtureskavithamegha
This PPT explores the material other than cement, water and aggregates added to batches before mixing or during mixing to modify the properties of ordinary concrete & to make it more suitable for the essential condition. Organic or inorganic materials are added in small quantifies to modify the properties of the concrete which is fresh/hardened state.
Understand the different types of admixtures, advantages and disadvantages. Mechanism of admixtures and different applications.
Design a suitable splice and bolted connection for extending a column of rolled steel cross section ISHB200@40 kg/m. The column is to support service axial compressive load, bending moment and shear force of 1000 KN, 50 KN and 90 KN respectively. The column ends are smooth finished. Ordinary bolts of M20 grade 4.6 are available for splicing.
Explore the innovative world of trenchless pipe repair with our comprehensive guide, "The Benefits and Techniques of Trenchless Pipe Repair." This document delves into the modern methods of repairing underground pipes without the need for extensive excavation, highlighting the numerous advantages and the latest techniques used in the industry.
Learn about the cost savings, reduced environmental impact, and minimal disruption associated with trenchless technology. Discover detailed explanations of popular techniques such as pipe bursting, cured-in-place pipe (CIPP) lining, and directional drilling. Understand how these methods can be applied to various types of infrastructure, from residential plumbing to large-scale municipal systems.
Ideal for homeowners, contractors, engineers, and anyone interested in modern plumbing solutions, this guide provides valuable insights into why trenchless pipe repair is becoming the preferred choice for pipe rehabilitation. Stay informed about the latest advancements and best practices in the field.
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.
Event Management System Vb Net Project Report.pdfKamal Acharya
In present era, the scopes of information technology growing with a very fast .We do not see any are untouched from this industry. The scope of information technology has become wider includes: Business and industry. Household Business, Communication, Education, Entertainment, Science, Medicine, Engineering, Distance Learning, Weather Forecasting. Carrier Searching and so on.
My project named “Event Management System” is software that store and maintained all events coordinated in college. It also helpful to print related reports. My project will help to record the events coordinated by faculties with their Name, Event subject, date & details in an efficient & effective ways.
In my system we have to make a system by which a user can record all events coordinated by a particular faculty. In our proposed system some more featured are added which differs it from the existing system such as security.
Welcome to WIPAC Monthly the magazine brought to you by the LinkedIn Group Water Industry Process Automation & Control.
In this month's edition, along with this month's industry news to celebrate the 13 years since the group was created we have articles including
A case study of the used of Advanced Process Control at the Wastewater Treatment works at Lleida in Spain
A look back on an article on smart wastewater networks in order to see how the industry has measured up in the interim around the adoption of Digital Transformation in the Water Industry.
TECHNICAL TRAINING MANUAL GENERAL FAMILIARIZATION COURSEDuvanRamosGarzon1
AIRCRAFT GENERAL
The Single Aisle is the most advanced family aircraft in service today, with fly-by-wire flight controls.
The A318, A319, A320 and A321 are twin-engine subsonic medium range aircraft.
The family offers a choice of engines
Saudi Arabia stands as a titan in the global energy landscape, renowned for its abundant oil and gas resources. It's the largest exporter of petroleum and holds some of the world's most significant reserves. Let's delve into the top 10 oil and gas projects shaping Saudi Arabia's energy future in 2024.
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/
Industrial Training at Shahjalal Fertilizer Company Limited (SFCL)MdTanvirMahtab2
This presentation is about the working procedure of Shahjalal Fertilizer Company Limited (SFCL). A Govt. owned Company of Bangladesh Chemical Industries Corporation under Ministry of Industries.
Sachpazis:Terzaghi Bearing Capacity Estimation in simple terms with Calculati...Dr.Costas Sachpazis
Terzaghi's soil bearing capacity theory, developed by Karl Terzaghi, is a fundamental principle in geotechnical engineering used to determine the bearing capacity of shallow foundations. This theory provides a method to calculate the ultimate bearing capacity of soil, which is the maximum load per unit area that the soil can support without undergoing shear failure. The Calculation HTML Code included.
COLLEGE BUS MANAGEMENT SYSTEM PROJECT REPORT.pdfKamal Acharya
The College Bus Management system is completely developed by Visual Basic .NET Version. The application is connect with most secured database language MS SQL Server. The application is develop by using best combination of front-end and back-end languages. The application is totally design like flat user interface. This flat user interface is more attractive user interface in 2017. The application is gives more important to the system functionality. The application is to manage the student’s details, driver’s details, bus details, bus route details, bus fees details and more. The application has only one unit for admin. The admin can manage the entire application. The admin can login into the application by using username and password of the admin. The application is develop for big and small colleges. It is more user friendly for non-computer person. Even they can easily learn how to manage the application within hours. The application is more secure by the admin. The system will give an effective output for the VB.Net and SQL Server given as input to the system. The compiled java program given as input to the system, after scanning the program will generate different reports. The application generates the report for users. The admin can view and download the report of the data. The application deliver the excel format reports. Because, excel formatted reports is very easy to understand the income and expense of the college bus. This application is mainly develop for windows operating system users. In 2017, 73% of people enterprises are using windows operating system. So the application will easily install for all the windows operating system users. The application-developed size is very low. The application consumes very low space in disk. Therefore, the user can allocate very minimum local disk space for this application.
Courier management system project report.pdfKamal Acharya
It is now-a-days very important for the people to send or receive articles like imported furniture, electronic items, gifts, business goods and the like. People depend vastly on different transport systems which mostly use the manual way of receiving and delivering the articles. There is no way to track the articles till they are received and there is no way to let the customer know what happened in transit, once he booked some articles. In such a situation, we need a system which completely computerizes the cargo activities including time to time tracking of the articles sent. This need is fulfilled by Courier Management System software which is online software for the cargo management people that enables them to receive the goods from a source and send them to a required destination and track their status from time to time.
1. USE OF CHEMICALAND MINERAL
ADMIXTURE IN CONCRETE
Presenting by
U13CE030 Hardik Visapara
U13CE003 Chirag Mandaviya
INTER COLLEGE POWER POINT PRESENTATION CONTEST
ULTRATECH – SPARKLING STARS
2. Content:
Basic of Admixture
Need of Admixture
Types of admixture
Various chemical admixtures
Various mineral admixtures
Conclusion
3. What is ADMIXTURE and Why it is used ?
A material other than water, aggregates, or cement that is used as an ingredient of
concrete or mortar to control setting and early hardening, workability, or to
provide additional cementing properties is called as Admixture.
Admixtures are added in small quantity either in powder or liquid form
Combination of various admixtures are to be used where more than one property
is to be altered
4. Need of Admixture:
Purpose:
To modify the fresh property;
Increase the workability without increasing the water cement ratio or decrease the water
content at the same workability.
Retard or accelerate the time of initial setting.
Reduce or prevent the settlement or create slight expansion.
Modify the rate or capacity of bleeding.
5. Need of Admixture:
Purpose:
To modify harden property;
Reduce the heat of evolution.
Accelerate the rate of strength development at early stages.
Increase the durability.
Decrease the permeability of concrete.
6. Types of Admixtures
Chemical admixtures :
Accelerators,
Retarders,
Water-reducing agents,
Super plasticizers,
Air entraining agents etc.
Mineral admixtures :
Fly-ash
Blast-furnace slag,
Silica fume etc.
7. Chemical Admixtures
Accelerator:
An admixture which, when added to concrete, increases the rate of hydration of hydraulic
cement, shortens the time of set in concrete, or increases the rate of hardening or
strength development.
Set Accelerating Admixtures:
Reduce the time for the mix to change from the plastic to the hardened state. Set accelerators
have relatively limited use, mainly to produce an early set.
Calcium chloride in 1 to 2 % w/w used as accelerators
9. Chemical Admixtures
Retarders:
The function of retarder is to delay or extend the setting time of cement paste in
concrete.
Retarding admixtures delay the end of the dormant period and the start of setting and
hardening.
The mechanism of set retards is based on absorption. The large admixture anions and
molecules are absorbed on the surface of cement particles, which hinders further
reactions between cement and water i.e. retards setting.
The commonly known retards are Soluble Zinc salts, Soluble
Borates and Carbohydrates derivatives used in fraction of percent by weight of
cement.
10. Chemical Admixtures
Retarders:
Applications:
For concreting in hot weather.
For preventing formation of cold joints.
Ready mixed concrete (RMC).
11. Chemical Admixtures
Water Reducing Admixtures (Plasticizers):
Purpose:
To achieve a higher strength by decreasing the water cement ratio at the same
workability as an admixture free mix.
To achieve the same workability by decreasing the cement content so as to reduce the
heat of hydration in mass concrete.
To increase the workability so as to ease placing in accessible locations.
Water reduction is more than 5% but less than 12%
The commonly used admixtures are Lignosulphonic acid and hydrocarbolic acids
etc.
12. Chemical Admixtures
Water Reducing Admixtures:
Applications:
For Improving workability without altering w/c ratio.
High strength and high performance concrete.
Good finishing of concrete surface.
13. Chemical Admixtures
Super plasticizers:
It is also called as High range water reducing admixtures.
They are improved version of plasticizer.
They permits water reduction up to 30% without loss of workability.
Commonly used super plasticizers are Modified lignosulphonates, Acrylic polymer,
Polycarboxylate ethers, Multicarboxylate ethers, etc.
14. Chemical Admixtures
Super plasticizers:
Applications:
Very high workability.
Self compacting concrete.
Self leveling concrete.
High strength and High performance concrete.
15. Chemical Admixtures
Air Entraining Admixtures:
Air is intentionally in corporated in form of minute spherical bubbles of 5 micron to
80 micron distributed evenly in entire mass of concrete.
Various admixtures used as air entertainer:
Natural wood resins.
Animal and vegetable fats.
Olive oil and fatty acid.
Wetting agents such as sulphonated organic compounds.
Water soluble soaps.
16. Chemical Admixtures
Air Entraining Admixtures:
Functions:
Improves workability.
Reduce segregation and bleeding.
Better finishing due to plasticity.
Improves resistance to frost action.
17. Chemical Admixtures
Corrosion inhibitors:
Corrosion-inhibiting admixtures can significantly reduce maintenance costs of reinforced
concrete structures throughout a typical service life of 30 to 40 years. Although
corrosion-inhibitors can raise the corrosion threshold, they are not an alternative to
impermeable durable concrete.
Colouring admixtures:
To give shade to the concrete.
Bonding admixtures:
Increases Bonding Strength between concrete and reinforcement
18. Mineral Admixtures
Admixtures like fly ash, silicate fume, slag comes in the category of mineral
admixtures.
To enhance the workability
Improve resistance to thermal cracking and alkali–aggregate reaction
To enable reduction in cement content
Reduces segregation, bleeding and heat of hydration
19. Mineral Admixtures
Fly ash:
Fly ash is fine residue left after combustion of ground or powdered coal.
They are all generally finer than cement.
Consist mainly of glassy–spherical particles as well as residues of hematite and
magnetite.
The use of fly ash in concrete makes the mix economical, improves the workability,
reduces segregation, bleeding and heat of hydration.
20. Mineral Admixtures
Silica fume (Micro silica):
It is obtained as a byproduct during the production of silicon and ferrosilicon alloys
The particle size of silica fume is 100 times smaller than cement particles i.e. its fine
as cigarette smoke
Improves compressive strength, bond strength, abrasion resistance
It makes the concrete dense that results in protection of reinforcement against
corrosion
21. Conclusion
Admixture are essential to obtain concrete with certain desired characteristics such
as high compressive strength, high workability, and high performance and
durability parameters to meet the requirement of complexity of modern structures.
They reduce cost of concrete construction and helps in achieving specific concrete
properties more effectively.
Admixtures ensure quality of concrete during mixing, transporting, placing, and
curing in adverse weather condition.