Measurement Of Workability

-Many different methods to measure workability

-Most common are Slump Cone Test & Compacting Factor Test

-Ball Penetration

-Flow Table Test

-Vebe Test

7.Use Of Admixture

-Most Important Factor which affects the workability

-Plasticizers, Super-Plasticizers

6.Grading Of Aggregates

-Maximum influence on workability

-Well graded aggregate has least amount of voids

-Better grading>Less Void Content>Higher Workability

5.Surface Texture Of Aggregate

-Surface area of rough texture is more

-Smooth aggregates will have higher workability

4.Shape Of Aggregate

-Angular, elongated or flaky aggregates makes the concrete very harsh

-Rounded or cubical shape aggregates contributes to better workability

3.Size Of Aggregate

-Bigger the size of aggregate the less is the surface area

-Less amount of water is required

-Bigger size of aggregate will give higher workability

2.Mix Proportion

-Higher the aggregate cement ratio the lower will be workability

-If rich concrete with lower aggregate cement ratio then workability of concrete will be more

1.Water Content

-Significant influence on the workability

-Higher the water content higher will be workable concrete

-Usually at site supervisors add more water

-Higher quantity of cement should also be added if water is being added

Factors Affecting Workability

-Water Content

-Mix Proportion

-Size Of Aggregate

-Shape Of Aggregate

-Surface Texture Of Aggregate

-Grading Of Aggregate

-Use Of Admixture

Workability of Concrete

-Flow of concrete

-Its placement without segregation, without loss of homogeneity

-Can be compacted & finished easily