In this Technical paper the experimented results obtained on the Compressive Strength of M50 grade of concrete with the addition of chemical admixtures is discussed. It is a known fact that we need high strength for concrete as we build structures to withstand heavy loads. Various chemical admixtures are available and their property to advance the compressive strength of concrete is not much known. In this direction ten water reducing Chemical admixtures were selected (four plasticizers and six super plasticizers) and they were added to M50 grade of concrete. As per ACI Method of mix design M50 grade of concrete was designed using OPC 43 grade of cement. To this M50 grade of concrete water reducing chemical admixtures are added in three different dosages. Cubes of standard size of 150mm x 150mm x 150mm were cast with three different water cement ratio and with three different dosage of the concerned chemical admixture. The cast cubes were tested for their 3days, 7days and 28 days strength and conclusions were drawn. It is found in the study that addition of chemical admixtures do considerably improve the compressive strength of concrete in cubes. Necessary tabulations and graphs are drawn and the performances of these chemical admixtures are studied and conclusion arrived.

Keywords: Compressive strength, concrete, Plasticizers, Super Plasticizers