Slump Test

The slump test is essentially a measure of consistency or the wetness of the concrete mix. This test is carried out with a steel mould in the form of a frustrum of cone whose top diameter is 100 mm, bottom diameter is 200 mm and the height is 300 mm. According to Indian standard specifications, the maximum size of the aggregate should not exceed 38 mm in the slump test. This method is suitable only for the concretes of medium to high workability. The slump value for high degree of workability should vary between 80 to 100 mm. It may be noted that as the slump value increases, the workability also increases.