Test On Concrete- Slump Test

 2.Slump Test :

This test is conducted to determine the workability of concrete. It needs a slump cone for test (See fig). 

✓ Slump cone is a vessel in the shape of a frustum of a cone with diameter at bottom 200 mm and 50 mm at top and 300 mm high. 

✓This cone is kept over a impervious platform and is filled with concrete in four layers. Each layer is tamped with a 16 mm pointed rod for 25 times. 

✓After filling completely the cone is gently pulled up. The decrease in the height of the concrete is called slump. Higher the slump, more workable is the concrete. The desired values of slumps for various 

works have been shown in fig.