Experimental Studies on Properties of Concrete and Cement Plaster using Robo Sand as Fine Aggregate

Concrete and Cement mortar is widely used construction material in the world. Based on global usage it is placed at second position after water. Natural river sand which is one of the constituents used in the production of conventional concrete and cement mortar become highly expensive and also scarce. Need of the hour is to find the most suitable substitute for sand, easy to produce and has all the required qualities for use in concrete. Sand is basic concrete making construction material required in large quantities. Robo sand is one of the most used among such materials to replace river sand, which can be used as an alternative to fine aggregate in cement mortar and concrete. In the present investigation workability and strength of concrete was evaluated by replacement of natural sand by Robo sand in proportions of 0%, 50%, 75%, and 100% is studied for M25 and M35grade concrete cubes, cylinders and prisms. Slump cone method is taken for finding workability. For strength parameters for each grade of concrete Cubes, Cylinders and Prisms were casted and tested at the age of 7 and 28 days. In this present experimental study cement plaster having mix proportions of 1:3 and 1:6 are prepared by replacing natural sand by Robo sand. Cement mortar specimens were tested for evaluation of compressive strength and water absorption.