Generally, Ready Mix Concrete is designed by an engineer which is generally known as concrete mix design of a specific grade viz M25, M30 etc... The design reports show the proportions of the various ingredients (coarse and fine aggregates, cement, water, often fly ash, admixture) of concrete based on the laboratory test mix for a particular grade.
The slump test and compression test are two of the most common types of tests used for checking the quality of ready mix concrete. While a slump test is performed on-site, a compression test is performed in a lab. A supervisor performs the slump test before the concrete is about to be inserted into the formwork. However, if during the concrete laying process if the supervisor finds that the green concrete is getting dry or if the concrete placement is interrupted, the remaining concrete is tested again.
The compression test is conducted for determining the characteristic strength of concrete. The result of this test is important for accepting in-site concrete work as it determines the concrete's strength. Historical slump and strength data are also taken into consideration. Moreover, for large projects trial mixes are often required.
Hindustan RMC ensure after exhaustive laboratory and plant trials are conducted, and honestly reported the ready mixed concrete mixes are supplied to ensure good quality.