• AVINASH KUMAR UPADHYAY

Concrete is made by mixing Cement, sand aggregate a certain amount of water. River Sand is most commonly and locally available and it plays a considerable role in mix design for the preparation of mix. Now a day’s when erosion occurs, it effect on the environment. The reduced quantity of natural sand also affects the construction sites and the infrastructural development of any country; hence we have to find best alternative which replace the river sand (fine aggregate), crushed stone (Robo sand or Manufactured sand) is being used in lieu of river sand. With the use of crushed rock, the excess river erosion can be control, which plays an influential character in protection of our environment. Before the use of this alternative in mix mortar, we have to investigate and compare their properties like Specific gravity, Fineness Modulus and Compressive strength with commonly available natural sand. The primary scope of this paper is to thoroughly investigate ,all the important characteristics such as specific gravity, Percentage finer, and then juxtapose it with natural river sand, and studied the micro structural analysis with SEM and XRD and determine the compressive strength by the using the crushed stone in place of natural river sand with percentage 0%, 25%, 50%, 75% and 100%.The investigation was carried out on the specimens of selected grade such as M20, M25 and M30 at the 0.45, 0.50 and 0.55water cement ratios respectively.

cement mortar, crushed stone, XRD, SEM

"STRENGTH AND MICRO STRUCTURAL BEHAVIOR OF MANUFACTURING SAND BY REPLACING NATURAL SAND", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 6, page no.4-8, June 2019, Available :http://www.jetir.org/papers/JETIR1907V02.pdf

"STRENGTH AND MICRO STRUCTURAL BEHAVIOR OF MANUFACTURING SAND BY REPLACING NATURAL SAND", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 6, page no. pp4-8, June 2019, Available at : http://www.jetir.org/papers/JETIR1907V02.pdf