Use of Stearic Pharmaceuitcal Chemicals in the Preparation of Cemen

Prashant Sharma

This paper addresses the influence of Stearic Acid (SA) on setting time and compressive strength of cement mortar. Till now, researcher used SA as a grinding additive (powder form) with cement during manufacturing of cement. Test have been conducted using 0.25%, 0.5%, 0.75%, 1%, 1.5%, and 2% of SA by weight of cement. The little change in compressive strength under different curing condition was tested and performed. For testing compressive strength, cubes were casted at a curing age of 3, 7 and 21 days. Initial and final setting time with different proportion of SA has been tested. We have concluded that SA reflects retarding properties when used as an admixture with OPC. It caused set retardation of cement, depending upon the proportion of SA used. Reduction in setting time begins from 0.5% SA content and flash setting occurs at 2.0% SA content. So, SA can be used as an effective retarder who shows a slight change in compressive strength of cement mortar.