What will you do if the slump was not achieved?

If the test still fails, one may add cement to the concrete mix to minimize slump value. After adding water or cement to the concrete mix, remix the batch for 30 revolutions to make sure the additional material is correctly blended with the fresh concrete.

What if concrete fails slump test?

If the slump test fails, then we should reject that concrete. If the water-cement ratio is high, then the workability of concrete is increased. Still, the durability of concrete is decreased due to excessive water, which forms voids in the concrete and reduce the strength of the concrete.

How do you fix concrete slump?

Adding just 1 gallon of water per cubic yard can: Increase slump 1 inch, decrease compressive strength 150 to 200 psi, waste about 1/4 bag of cement, and increase shrinkage by 10\%. But water isn’t the only way to adjust slump. Consider adding a superplasticizer at the site to increase slump.

What are the problems that are likely to occur if the concrete has too much slump?

Increased porosity also results in more efflorescence, causing the color of the surface to be less intense or whitish. Excessive slump also can result from accidentally adding too much water-reducing admixtures or super-plasticizers to a mix. This can result in aggregate segregation and a serious loss of strength.

Is code for slump test of concrete?

Slump Test of Concrete as per IS Code 1199-1959 | Procedure, Lab Report, Apparatus List.

What is 4 inch slump concrete?

It shows the flow and overall workability of freshly mixed concrete. Simply put, the higher the slump, the wetter the mix. Four-inch (4”) slump is very common with normal weight concrete and is a good for pumping. Slumps that are above average will cause reduced strength, durability, and permeability of the concrete.

Why is concrete slump important?

A higher slumped concrete is more more fluid and will flow some distance on its own. By using water-reducing admixtures, you can change the slump without affecting the integrity of the concrete mix.

What is the normal slump of concrete?

Four-inch (4”) slump is very common with normal weight concrete and is a good for pumping. Slumps that are above average will cause reduced strength, durability, and permeability of the concrete. Admixtures should be used instead of water to achieve higher slumps so that you can maintain the quality of your concrete.