Table of Contents
- 1 What do u mean by workability?
- 2 What is the workability of concrete and why is it important?
- 3 What is workability of concrete types and effect on concrete strength?
- 4 What is high workability concrete?
- 5 What is workability of concrete and factors affecting workability?
- 6 What is meant by workability of concrete how it is tested?
- 7 What is value of workability of concrete?
- 8 What do you mean by workability of concrete and on what factor it depends?
- 9 What are the factors affecting workability of concrete?
- 10 What is the workability of concrete, and why is it important?
- 11 How can the workability of concrete be increased?
What do u mean by workability?
Workability is also defined as the amount of useful internal work necessary to produce full compaction of concrete. Workability is the property that determines the effort required to manipulate a freshly mixed quantity of concrete with minimum loss of homogeneity.
What is the workability of concrete and why is it important?
Why is the workability of concrete important? A. Any concrete mixture needs to be sufficiently workable to be properly placed and consolidated with the available procedures to fill the forms completely and surround the reinforcement and other embedded items.
What is workability of concrete and how is it measured?
When measuring the workability and consistency of a batch of concrete, a concrete slump test must be performed for each batch of fresh concrete. The cone is filled with concrete, and then removed. The shape of the concrete after the cone removal is then assessed to determine the workability.
What is workability of concrete types and effect on concrete strength?
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). Water cement ratio has much effect in the workability.
What is high workability concrete?
High workability concrete has applications where limited vibration is possible (particularly useful in void filling). Concrete having high workability can be achieved without significant impact on mechanical properties (eg compressive strengths and shrinkage) through appropriate mix design.
What is meant by workability of concrete How is it tested?
Workability of concrete is defined as the ease and homogeneity with which a freshly mixed concrete or mortar can be mixed, placed, compacted and finished. Strictly, it is the amount of useful internal work necessary to produce 100% compaction.
What is workability of concrete and factors affecting workability?
Factors affecting the workability of concrete are materials such as water content, cement concrete, sand and aggregate properties such as size, shape, grading, mix design ratio and use of admixtures. Strength of concrete decreases with increase in workability of normal concrete affecting the durability of concrete.
What is meant by workability of concrete how it is tested?
How is the workability of concrete measured?
The concrete slump test or slump cone test is the most common test for workability of freshly mixed concrete which can be performed either at the working site/field or in the laboratory. To maintain the workability and quality of fresh concrete, it is necessary to check batch by batch inspection of the concrete slump.
What is value of workability of concrete?
Concrete
| Degree of workability | Compacting factor | |
|---|---|---|
| Low | 0.85 | 0.87 |
| Medium | 0.92 | 0.935 |
| High | 0.95 | 0.96 |
| Very high | – | – |
What do you mean by workability of concrete and on what factor it depends?
Workability of concrete is measured in terms of the ease of mixing and placing of concrete. Highly workable concrete can easily be mixed, placed and transported. All the materials and processes involved in producing concrete affect the workability of concrete.
How do u measure the workability of concrete?
- Slump Test. The concrete slump test or slump cone test is the most common test for workability of freshly mixed concrete which can be performed either at the working site/field or in the laboratory.
- Compaction Factor Test.
- Flow Test.
- Vee Bee Consistometer Test.
- Kelly Ball Test (Ball Penetration Test)
What are the factors affecting workability of concrete?
Factors affecting the workability of concrete are materials such as water content, cement concrete, sand and aggregate properties such as size, shape, grading, mix design ratio and use of admixtures. Each and every process and materials involved in concrete mixing affects the workability of concrete.
What is the workability of concrete, and why is it important?
Workability of Concrete is a broad and subjective term describing how easily freshly mixed concrete can be mixed, placed, consolidated, and finished with minimal loss of homogeneity. Workability is a property that directly impacts strength, quality, appearance, and even the cost of labor for placement and finishing operations.
How can we increase workability of concrete?
How To improve the workability of concrete Increase water/cement ratio. Increase size of aggregate. Use well-rounded and smooth aggregate instead of irregular shape. Increase the mixing time. Increase the mixing temperature. Use non-porous and saturated aggregate. With addition of air-entraining mixtures.
How can the workability of concrete be increased?
The workability of concrete can be enhanced by use of rounded aggregates and by the use of workability enhancing admixtures. With the use of admixture such as air-entraining admixtures, the workability in increased without increase in water-cement ratio. This helps in attaining required strength and workability for concrete work.