Experimental Investigation on Partial Replacement of Natural Fine Aggregate by HD-Pet Thermoplastics and Cement by Glass Fibbers in Cement Concrete

Cement concrete is a highly consumed building material around the globe in almost all the construction projects and applications. A matrix containing the composition of binding material cement, well graded inert materials like fine and coarse aggregates, along with water and admixtures is known as the cement concrete. Around the globe, the infrastructure development is increasing day by day, which resulted into the heavy extraction and consumption of naturally available materials like sand, stones, lime, water and soil etc. Because of the modernization around the globe, the problem faced by the excess consumption of cement concrete includes high demand of cement concrete production, higher cost of cement and concrete making materials, excessive wastage, pollution, extraction and consumption of the naturally available materials. The above problem made us to think for an alternative construction material like HD-PET (High Density Polyethylene Terephthalate) Thermoplastics and Chopped Strand Mat Glass Fibers obtained from the industries of waste plastic and glass recycling units in the production of cement concrete. This dissertation work deals with the study of partial replacement of fine aggregates by HD-PET Thermoplastics and Cement by Chopped Strand Mat Glass Fibers in M20 grade of cement concrete. HD-PET and Glass fibers are the waste obtained from the waste plastic and glass recycling units. In this project work, we have made an attempt to study the compressive, split tensile and flexural strength of M20 grade cement concrete by using HD-PET Thermoplastics and Glass fibers as partial replacement to the fine aggregates and cement. Compressive strength test was conducted to study the strength of concrete for 7 and 28 days of curing period and the split tensile strength and flexural strength are conducted to study the strength for 28 days of curing period. The compressive strength of cement concrete showed the highest test results at 15% HD-PET and 0.5% chopped strand mat glass fibers with a value of 8.959 N/mm2 at 7 days and 25.281 N/mm2 at 28 days, split tensile strength of cement concrete showed higher strength at 15% HD-PET and 0.5% chopped strand glass fibers with a value of 2.916 N/mm2 at 28 days, the highest flexural strength of concrete was obtained at 15% HD-PET and 0.5% chopped strand glass fibers with a value of 3.944 N/mm2 at 28 days of curing period, which is higher than the normal conventional cement concrete. From this experimental study, it is concluded that the fine aggregates can be partially replaced by HD-PET upto 15% and cement by constant 0.5% of chopped strand mat glass fibers.