A Study on The Partial Replacement of Coarse and Fine aggregate By Coconut Shell and Quarry Dust Mix

Abstract

In developing countries where concrete is widely used, the high and steadily increasing cost of concrete has made construction very expensive. The production of concrete requires various materials like Cement, Fine aggregate and Coarse Aggregate. Due to extensively use of concrete which lead to an increase in cost of materials. Therefore, an alternate material is used for partial replacement of Fine aggregate and coarse aggregate in concrete. This project is experimented to reduce the cost of concrete. In this research work experiments have been conducted with collection of materials required and the data required for mix design are obtained by sieve analysis and specific gravity test. Sieve analysis is carried out from various fine aggregates (FA) and coarse aggregates (CA) samples and the sample which suits the requirement is selected. Specific gravity tests are carried out for fine and coarse aggregate. In this project Fine aggregate is replaced by Quarry dust of 30 % along with the partial replacement of coarse aggregate with coconut shell. The coarse aggregate is replaced with 10 %, 20%, 30% and 40 % by coconut shell. The design Mix used for the project is M20 grade (1:1.5:3) with W/C Ratio 0.5. The Conventional concrete and Coconut shell with quarry dust concrete specimens were casted and tested for compressive strength and split tensile strength for 7 and 28 days. The compressive strength of the CS 10 % + QD 30% and CS 20% + QD 30% was 24.35 N/mm2 and 24.98 N/mm2, Split tensile strength is 3.454N/mm2 and 3.499N/mm2 .