Agriculture Waste Used as Partial Replacement in Green Concrete Manufacturing

Abstract

Abstract: Nowadays the total requirement of concrete increased in the whole world. This paper is about green concrete based on agricultural waste, research is using agricultural waste as a substitute for cement. Concrete mix proportion used is 1:1:2 (concrete of grade M25), from that quantities of different materials find out for Rice Husk Ash and Coconut Shell as a partial replacement of cement and coarse aggregates respectively. Like this three mix design done, one mix for Rice husk, one for coconut shell and one for combination of both. Agricultural waste contains chemical compounds which have pozzolanic properties. The rice husk ash is finely ground material which can give the pozzolanic reaction. The silica contents in the agricultural waste material reacted with calcium oxide to produce calcium silicate gel helps in binding the concrete. Some researches has been done for the use of agricultural waste in concrete. Collection of materials, mix design and quantities required to produce concrete blocks is find out then actual preparation of concrete blocks and different test on concrete done in this experiment. From the experimentation result is that 9% utilization of these materials in the replacement of cement gives rise to 15% increase in strength of concrete. Rice husk ash powder has a large amount of silica with which gives pozzolanic action and increases the strength. Use of coconut shell pieces of proper size (i.e. 20 mm nominal size) as a partial substitute of coarse aggregates in different percentage ranging from 0% to 50%. From the experiment results, if coconut shells used greater than 12.5% by weight of coarse fraction gives lightweight concrete without much reduction in strength. Use of both Rice husk ash and coconut shell improves test results than concrete with only coconut shell replacement. Its use reduces the environmental burden of decomposition of organic waste and also reduces pollution generated by it. Keywords: Pozzolanic, Rice Husk Ash, Coconut Shell, Partial replacement, Agro-waste.