Durability and mechanical properties of cement partially replaced by seashells (#2241)

Authors

Melendez Espinoza, Joseph

Huamancusi Rupay, Jhon Elvis

Eyzaguirre Acosta, Carlos Augusto

Abstract

Concrete is a fundamental material in construction, but its high cement consumption contributes significantly to global CO₂ emissions. To promote sustainability, this study explores the use of seashell powder as a partial cement replacement in ecological concrete. The research assesses its impact on compressive strength, focusing on 28-day performance. Cement was substituted with seashell powder at 4%, 8%, and 12%, and concrete specimens were tested at 7, 14, 21, and 28 days. The results showed that 4% and 8% replacement enhanced compressive strength at 28 days, while 12% led to a reduction compared to the control mix. The study confirms the viability of seashell powder as an alternative material, recommending an optimal replacement rate of 8% to improve strength while promoting environmental sustainability.