Effect of coconut coir pith as partial substitute for river sand in eco-friendly concrete

Abstract

Abstract India is one of the largest producers of coconut crop in the world. Coconut coir pith is an organic tiny particle obtained from coconut based industry and is of lignocellulosic nature. Disposal of coir pith by land filling poses severe environmental issues. On the other hand, limited availability of natural resources, namely, river sand and potable water is a major problem that cannot cater the increasing demands of construction industry. The present investigation explores the possible utilization of an agro waste, namely, raw and untreated coconut coir pith as partial substitute for natural sand in concrete under normal curing and self curing conditions. Tests were performed to determine the compressive strength, split tensile strength and flexural strength at various ages. SEM images were used to study the morphology of formed hydrates. High water absorption and retention capacity of coconut coir pith limits their use in concrete. Usage of coconut coir pith as sand replacement material can be a solution to maintain sustainable environment by the way of reduction in energy and non renewable resources.