EFFECT OF HCL CONCENTRATION ON NORMAL CONCRETE AND ADMIXTURED CONCRETE MADE WITH AND WITHOUT MANUFACTURED SAND

Concrete is considered to be the most widely used and versatile material of construction all over the world. One of the important ingredients of conventional concrete is natural sand or river sand, which is on the verge of exhausting due to abundant usage. In India, the conventional concrete is produced by using natural sand obtained from riverbeds as fine aggregate. However, due to the increased use of concrete in almost all types of construction works, the demand of natural or river sand has been increased. To meet this demand of construction industry excessive quarrying of sand from river beds is taking place causing the depletion of sand resources. Thus the scarcity of natural sand has forced to find the suitable substitute. The cheapest and the easiest way of getting substitute for natural sand is by crushing natural stone to get artificial sand of desired size and grade which would be free from all impurities. Robo sand is an alternative for the common river sand. In this project an attempt is made to provide concise information on the performance of Robo sand as a natural sand replacement material in concrete. Experimental data on compressive, tensile, flexural strengths, acid durability tests have been provided. The performance of concrete containing robo sand has been compared to those containing natural sand in concrete. Concrete modified with robo sand perform comparatively better than normal concrete with and without admixtures like GGBS & Silica fume. The performance of concrete containing robo sand in acid attack better compared to those containing natural sand in concrete