Effects of <i>Colocasia esculenta</i> (taro root) crop extract on the compressive strength of compressed earth blocks

Abstract This study explores the potential of taro root crop extract ( Colocasia esculenta ) as a natural additive to improve the physical and mechanical properties of compressed earth blocks (CEBs). Recognized for their sustainability and eco-friendly characteristics, CEBs are compacted construction materials made from soil and natural additives. The research aimed to enhance density, water absorption, and compressive strength, contributing to the development of cost-effective and environmentally friendly building materials. Using a Completely Randomized Design (CRD), six treatments with varying proportions of taro root crop extract (0%, 1%, 2%, 3%, 4%, and 5%) were prepared and tested after curing periods of 7, 14, and 28 days. Results indicated that Treatment 6, containing 5% taro root crop extract, demonstrated the highest compressive strength of 4.17 MPa after 28 days, surpassing the typical range for manually pressed CEBs. The addition of taro extracts also significantly enhanced density, with Treatment 6 achieving a mean density of 2386.10 kg/m 3 . Although water absorption rates increased with higher taro extract concentrations, they remained within acceptable limits for exterior applications. These findings underscore the viability of CEBs with taro root crop extract for masonry construction and walkways, offering sustainable and economical solutions. This research highlights the effectiveness of taro root crop extract in improving CEB properties, advancing sustainable construction practices. The findings encourage further exploration of agricultural by-products as natural additives, promoting eco-friendly innovations in construction materials that align with global sustainability goals.