ABSTRACT
The significant reliance on conventional aggregates like gravel and coarse aggregate for concrete construction has led to a depletion of natural stone resources and consequent environmental damage, resulting in an ecological imbalance. It is essential to investigate alternative materials that can effectively replace natural stone. In Nigeria, the utilization of non-conventional aggregates in concrete construction is currently not widespread. Notably, Lagos state holds the distinction of being the country's largest producer of coconuts. Other large producing coconut states in Nigeria are Akwa Ibom, Cross Rivers and Bayelsa states. Nigeria produces about 300 tons of coconuts annually. Coconut is produced in about 22 states in Nigeria. The major producers of coconut include states like Delta, Edo, Ondo, Ekiti, Oyo, Osun, Ogun, Imo, Anambra, Enugu, Ebonyi, Abia, Kogi and Kwara etc. Hence this project tends to look at the possibility of making use of this product for construction processes. `This study aimed to investigate the impact of incorporating coconut shells on the compressive strength of concrete. A comparative analysis was conducted between traditional concrete and concrete mixes containing coconut shell. Various proportions of coconut shell by weight were used in the concrete mix, ranging from 0% to 30%, namely 5%, 10%, 15%, 20%, 25%, and 30%. The coconut shells were initially crushed and then sieved to obtain an optimal size that retained particles on the 14mm sieve, passed through the 19mm sieve, and retained particles on the 10mm sieve. Experimental tests, including slump tests, sieve analysis, and compressive tests, were carried out.
