Workability concrete technology

Concrete technology - SlideShare

Apr 17, 2016· Concrete technology Workability, Factors influencing workability, Measurement of workability, Effect of time and temp. on workability A.Pavan Kumar B.tech, Civil Engineering, SVEC,TPT,AP 2. What is workability ????? • The property of fresh concrete which is indicated by the amount of useful internal work required to fully compact the concrete ...

Workability of Concrete - Types and Effects on Concrete ...

Jun 05, 2016· Workability of Concrete Workability of concrete is the property of freshly mixed concrete which determines the ease and homogeneity with which it can be mixed, placed, consolidated and finished' as defined by ACI Standard 116R-90 (ACI 1990b). ASTM defines it ...

Concrete Technology Manual Chapter 3, Review of Concrete ...

A properly designed concrete mixture will possess the desired workability for the fresh concrete and the required durability and strength for the hardened concrete. Typically, the volume of a mix is about 10 to 15% cementitious material, 60 to 75% aggregate, and 15 to 20% water. Entrained air in concrete mixes may also take up to 8%.

civil engineering mcqs with answers - concrete technology

The practical utility of concrete technology for civil engineers is to: A. ... The workability of concrete is defined as the: A. ease with which it can be mixed, transported and placed in position in a homogeneous state: B. breaking up of cohesion in a mass of concrete: C.

Top 9 Experiments on Concrete Technology

Concrete is a construction material composed of cement, fine aggregates (sand) and coarse aggregates mixed with water which hardens with time. Portland cement is the commonly used type of cement for production of concrete. Concrete technology deals with study of properties of concrete …

civil engineering mcqs with answers - concrete technology

View Answer Workspace Report Discuss in Forum. 182. Workability of concrete mix having very low water-cement ratio should be obtained by. A. flexural strength test. B. …

Enhancing Concrete Workability - North America

Mixing Concrete. To ensure homogenous distribution of a concrete mixture, the workability and mixing time must be optimized. This is especially true with lower water content mixtures. The following technology can improve the efficiency of the mixing process at the concrete plant:

CEMENT and CONCRETE TECHNOLOGY

CEMENT and CONCRETE TECHNOLOGY Prepared by: Eng. A.Al Kourd Eng. Adel Hammad 2009/2010. Cement and Concrete Technology (ECIV 3341) ... xHigh-Strength Concrete xHigh Workability or Flowing Concrete xShrinkage Compensating Concrete xFiber-Reinforced Concrete xConcrete Containing polymers xHeavyweight Concrete

Concrete Technology Manual Chapter 1, Structure Concrete ...

concrete of standard consistency, meeting uidity requirements may require use of chemical admixtures that enhance uidity. • Minimizes the water-cement ratio, concrete strength will increase as the quantity of concrete increases and as the water-cement ratio decreases. In general, consistency testing is an indication of workability.

Workability of Concrete - Types and Effects on Concrete ...

Aug 04, 2019· The use of synthetic fibers in concrete, it reduces workability of concrete as it makes the movement of aggregates harder by reducing the lubricating effects of cement paste in concrete. The Silica fume is used in concrete to reduce and increase the workability of concrete based on its quantity.

Methods for Measuring Workability of Concrete | Slump ...

Nov 25, 2017· Methods for Measuring Workability of Concrete. By: Haseeb Jamal / On: Nov 25, 2017. Following are the methods for measuring the workability of concrete: Slump test. Compacting factor test. Vebe test. Flow table test.

What is Workability of Concrete? Types, Mechanism - Civil ...

Desirable Workability for Construction. Desirable workability depends on two factors which are: Section size, amount and spacing of reinforcement: When a section is narrow, complicated, several narrow corners, inaccessible parts; a highly workable concrete is desirable to obtain full compaction through a reasonable amount of effort. When the section is crowded with steel reinforcement and ...

Concrete Workability | Fibo Intercon Batching Plant

Concrete workability is measured by the slump. The slump is the measurement to concrete falls when placed in a slump cone, and the slump cone is lifted. Just like building a sand castle in a bucket. Images and the process of the slump test is below. This is the reason why concrete should be designed with the correct workability or slump.

Workability of Concrete - Types and Effects on Concrete ...

Workability of Concrete Workability of concrete is the property of freshly mixed concrete which determines the ease and homogeneity with which it can be mixed, placed, consolidated and finished' as defined by ACI Standard 116R-90 (ACI 1990b). ASTM defines it ...

CE8404 CT Notes, CONCRETE TECHNOLOGY Notes – CIVIL 4th …

Aug 28, 2019· CE8404 CT Notes. Anna University Regulation 2017 CIVIL CE8404 CT Notes, CONCRETE TECHNOLOGY Lecture Handwritten Notes for all 5 units are provided below. Download link for CIVIL 4th Sem CONCRETE TECHNOLOGY Notes are listed down for students to make perfect utilization and score maximum marks with our study materials.. CE8404 CONCRETE TECHNOLOGY …

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Jul 18, 2018· Plasticising and superplasticising admixtures have taken an indispensable role in advancing the concrete technology and development of SCC. Before the 1960s, workability improving admixtures based on hydroxycarboxylic acids or lignosulphonates had been developed.

Air Entrainment and the Properties of Concrete | Concrete ...

The air entrained concrete is more plastic and can be handled more easily than ordinary concrete. Air entrainment also increases the pump-ability of the concrete to a great extent. For better workability of concrete, the aggregate particles should be spaced in such a way that they can move one over the other with ease during mixing and placing.

Concrete Technology MCQ Practice Questions (Civil Eng) Set 4

Pick up the correct statement from the following: Options are : All the above. Large size aggregates increase the workability due to lesser surface area. An increase in water content must be accompanied by an increase in cement content. The slump of the concrete mix …

What are the Factors Affecting Workability of Concrete?

Many times admixtures are used in concrete to enhance its properties. Therefore, properties of these materials and their content affect the workability of concrete. Following are the general factors affecting concrete workability: Cement Content of Concrete Cement content affects the workability of concrete in good measure.

NPTEL :: Civil Engineering - Concrete Technology

Mix Design of concrete: ACI 211 Method: Download To be verified; 18: Mix Design of concrete:Packing Density, Rheology: Download To be verified; 19: Batching and Mixing of concrete: General Principles: Download To be verified; 20: RMC and Transporting Concrete: Download To be verified; 21: Workability and Pumping of Concrete: Download To be ...

Concrete technology Archives | Civil Engineering Courses

Concrete technology : The branch of Civil Engineering which deals with the fundamental principles of concrete, is known as Concrete Technology. Properties of concrete in plastic state, Properties of concrete in hardedned state, Advantage of concrete, Disadvantage of concrete, Ingredients of concrete,cement aggregate and water,Types of cement ...

WORKABILITY RETAINING ADMIXTURES FOR CONCRETE …

EXTENDED SLUMP TECHNOLOGY WORKABILITY RETAINING ADMIXTURES FOR CONCRETE SS99© 2017 WHEN SHOULD YOU USE IT? Workability retaining admixtures should be used when a decrease in workability is expected and consistent placement can be considered a challenge. Such cases include, but are not limited to: hot

3 METHODS OF DETERMINING WORKABILITY OF CONCRETE ...

Oct 29, 2015· Different Test Methods for Workability Measurement Depending upon the water cement ratio in the concrete mix, the workability may be determined by the following three methods. Slump Test Compaction Factor Test Vee-bee Consistometer Test 1. Slump Test Suitability This method is suitable only for the concrete of high workability. This test is carried out with […]

250+ TOP MCQs on Workability of Fresh Concrete and Answers

Concrete Technology Questions and Answers for Aptitude test on "Workability of Fresh Concrete". 1. What do you mean by workability? a) ASTM C 125 defines workability as the property determining the effort required to manipulate a freshly mixed quantity of concrete with a maximum loss of homogeneity

CONCRETE TECHNOLOGY | Civil Engineering | Harshness ...

CONCRETE TECHNOLOGY | Civil Engineering | Harshness | Bleeding | Workability | Segregation |JEE 2021Subir Bharti Mittal is a student who studying in Industri...

Concrete Technology MCQ - Aggregate MCQ | Page 11 of 27 ...

111. Admixtures which cause early setting and hardening of concrete are called as workability admixture super plasticizers accelerators retarders 112. When the cement content and workability are kept constant, the greater proportion of fine aggregate will be required if maximum size of aggregate is larger maximum size of aggregate is small all in aggregate is ...

Sep 07, 2011· Workability is the ability of a fresh (plastic) concrete mix to fill the form/mold properly with the desired work (vibration) and without reducing the concrete's quality. Workability depends on water content, aggregate (shape and size distribution), cementitious content and age (level of hydration) and can be modified by adding chemical admixtures, like superplasticizer.

Concrete Technology - Course

The course on "Concrete Technology" focuses on concrete making materials including supplementary cementitious materials. Concrete production process also forms a part of the discussion. Going through the course one would develop first-hand knowledge on concrete production process and properties and uses of concrete as a modern material of ...

CIVIL ENGINEERING: CONCRETE TECHNOLOGY (WORKABILITY …

Sep 07, 2011· Workability is the ability of a fresh (plastic) concrete mix to fill the form/mold properly with the desired work (vibration) and without reducing the concrete's quality. Workability depends on water content, aggregate (shape and size distribution), cementitious content and age (level of hydration) and can be modified by adding chemical admixtures, like superplasticizer.

New Concrete Technology • Aggregate Research International

Jan 06, 2010· BSI is a new concrete technology that has a much higher tensile and flexural (bending) strength than standard concrete. It is a fiber-reinforced concrete that is combined with premixed dry components. It is much denser than standard concrete and structures built with it will need far less new concrete, perhaps as much as 80% less.

How to Determine the Workability of Concrete ? | Concrete ...

Introduction to Workability of Fresh Concrete: The strength of concrete of a given proportion is affected very much by the degree of its compaction. Therefore it is desirable that the fresh concrete can be transported and placed without segregation and bleeding, compacted and finished easily. This property of concrete is known as workability.

What Is Workability Of Concrete? Types And Effects On ...

The word "workability" or workable concrete signifies much wider and deeper meaning than the other terminology "consistency" often used loosely for workability. Consistency is the agility of Concrete. Factors Affecting the Workability of Concrete. The workability requirements for a concrete construction depends on: 1- Water cement ratio

Workability of Concrete: 7 Factors | Concrete Technology

FACTORS AFFECTING WORKABILITY OF CONCRETE

Concrete Technology | What is workability | what is ...

Nov 23, 2017· workability of concrete, workability, workability test of concrete, workability of concrete in hindi, workability of concrete by compaction factor test, work...

Concrete Technology - M L Gambhir - Google Books

Concrete Technology. M L Gambhir. Tata McGraw-Hill Education, 2004 - Cement - 658 pages. 10 Reviews . ... stress structure suitable surface Table temperature tensile termed vibration voids volume water content water-cement ratio weight workability ...

Types of Admixtures of Concrete & Cement | Chemical, Mineral

Mar 18, 2017· 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. Admixtures of concrete are generally used to alter the properties of concrete (such as increased workability or reduced water content, acceleration or retardation of setting time, …

MCQ on Concrete Technology| Most important Civil ...

Feb 29, 2020· Concrete technology is a core subject for MCQ on building materials and construction. MCQ on concrete technology and its constituent is also very important for competitive exam. This mcqs will help you to attend many civil engineering competitive exams. ... Workability of concrete is directly proportional to. a) time of transit b) water cement ...

Concrete Technology - Civil Engineering Questions and Answers

This is the civii engineering questions and answers section on 'Concrete Technology' with the option for disscussion in forum, usefull for competitive examination and entrance test like GATE ESE PSU. Solved examples with detailed answer description, disscussion in forum helps in easy to understand concepts.

Concrete Technology Archives - CivilBlog.Org

Feb 15, 2019· Concrete Technology. 6 FOCAL PROPERTIES OF CONCRETE IN FRESH AND HARDENED STATE. Suryakanta | February 21, 2019. ... cohesiveness and workability of the concrete in plastic stage, while they influence Read More. Concrete Technology. AN INTRODUCTION TO CEMENT CONCRETE FOR BEGINNERS.