Experimental investigation on rice husk ash and coconut shell used in building materials

Abstract

It is found that there are so many wastes which can be used in traditional concrete like E- wastes. Coconut shell and rice husk ash are also the main waste that can be used in traditional concrete. The coconut shells were taken on 10 % with replacement of coarse aggregate and rice husk ash were taken on 5 %, 10 %, 15 %, 20 % & 25 % with partial replacement of cement. It is found that compressive strength and tensile strength of concrete is increased. The volume of concrete also increased as replacement increased total cost of concrete is reduced by replacement coarse aggregate by coconut shells. Total cost of cement is reduced by replacing cement by rice husk ash. This coconut shell can be crushed and used as a coarse aggregate in production of concrete. Coconut shell concrete (CSC) could be used in rural areas and places where coconut is abundant and may also be used where the conventional aggregate is costly. The high cost of conventional construction material affects the economy of structure. It is becoming more difficult to find natural resources. Use of waste material not only helps in getting them utilized in cement, concrete and construction materials but also has numerous indirect benefits such as reduction in landfill cost savings in energy and protecting the environment from possible pollution effects. The characteristics properties of concrete such as compressive strength, split tensile strength and flexural strength using the mix made by replacing coarse aggregate with crushed coconut shell aggregate were reviewed in the present work. The compressive strength of the replacement concrete is 30.45 N/mm2. The compressive strength is increased by 9.3 % when compared to the conventional concrete. The Split Tensile Strength of the replacement concrete is 2.55 N/mm2. The Split Tensile strength is increased by 11.8 % when compared to the conventional concrete and the flexural strength of the replacement concrete is 8.45 N/mm2. The flexural strength strength is increased by 3 % when compared to the conventional concrete. Its utilization is cost effective and eco-friendly.