Experimental Investigation on Concrete in Which Cement is Replaced with Coffee Husk Ash

Abstract

Industrialization and urbanization are driving up the need for concrete, the most common construction material in the world. At this time, most studies are devoted to finding better ways to put agricultural waste by-products to use. There is hope that home builders would be incentivized to utilize coffee husk ash (CHA) instead of regular cement. This research is being conducted with the intention of examining the outcomes that occur when CHA is used as a partial replacement for cement. There has been an increase in the amount of CHA, which is a by-product of agriculture, which has led to concerns over its disposal as a potential risk to the environment. Hence, the purpose of this study is to determine if it is acceptable to use CHA in place of some Portland Pozzolana Cement (PPC) in the production of conventional concrete. Ash from coffee grounds contains many of the same chemical elements as like cement, including SiO₂, Al₂O₃, Fe₂O₃, and Cao, among others. It is thought that these components have Pozzolanic characteristics and function as very reactive binding materials. Constructing concrete mixes with varying amounts of CHA (0%, 4%, 8%, 12%, and 16%) is the focus of this experimental study. The goal of this study is to examine the mechanical properties of concrete. Therefore, cement production techniques must be changed to reduce CO₂ emissions and natural resource depletion, while construction prices may be reduced by the use of proportionate partial cement substitutes. According to the results of this experiment, CHA might be used to reduce the environmental effect of concrete by partially replacing cement in its production.