A STUDY ON STRENGTH & DURABILITY PROPERTIES OF HIGH STRENGTH CONCRETE WITH HYBRID FIBRES
Keywords:
Robo sand, Natural Sand, chemical admixture, fibres, compressive strength, durability test.Abstract
Increase in construction activities have led to an increase in demand for the various raw materials in concrete, specifically river sand which is the widely used fine aggregate. Due to increase in mining activities, the availability of this natural sand is becoming scarce. So it is necessary to think about alternatives for natural sand. Robo sand was one of the alternate materials proposed. Robo sand has many advantages, one of the major areas of concern is the fine material of size 150 micron and down removed during the manufacturing process and accumulated as a waste material. The purpose of this research is to experimentally investigate the effect of Robo sand in structural concrete by replacing river sand and develop a high strength concrete. It is proposed to determine and compare the differences in properties of concrete containing river sand and Robo-sand. It is also proposed to use different fibres and chemical admixtures to increase the strength and workability of concrete respectively. The investigations are to be carried out using several tests which include compressive test and durability test.
