Study on Properties of Concrete using Robosand as Fine Aggregate

Author(s):

Ganta Shanmukha Rao , ANDHRA UNIVERSITY COLLEGE OF ENGINEERING(A); Rahul Morampudi, ANDHRA UNIVERSITY COLLEGE OF ENGINEERING(A); Dr. Shaik Yajdani, ANDHRA UNIVERSITY COLLEGE OF ENGINEERING(A)

Keywords:

Robosand, Natural Sand, Concrete, Mortar, Replacement, Compressive Strength, Split Tensile Strength, Flexural Strength

Abstract:

Concrete is widely used 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 has become highly expensive and also scarce. Sand is basic concrete making construction material required in large quantities. Robosand is one among such materials to replace river sand, which can be used as an alternative fine aggregate in mortars and concrete. In this present research work, M20 and M30 grades of concrete are used as reference mixes. The fine aggregate (natural sand) was replaced with percentages 0% (for conventional concrete mixture ), 20%, 40%, 60%, 80% and 100% of robosand by weight and tests were conducted on the properties of fresh and hardened concrete. Slump-cone test, Compaction factor test and Vee-Bee Consistometer tests were performed to evaluate the workability characteristics of fresh Concrete. Compressive strength, Flexural strength and Split tensile strength were determined at the age of 7, 28, 56 and 91 days respectively. The results indicate that workability decreases with increase in robosand percentage which is due to the high water absorption capacity of robosand. The compressive strength is observed to be increasing up to 60% replacement of robosand and then decreased. Similar correlation was observed in both split tensile strength and flexural strength.

Other Details:

Manuscript Id	:	IJSTEV4I3015
Published in	:	Volume : 4, Issue : 3
Publication Date	:	01/10/2017
Page(s)	:	36-44

Download Article