Compressive Strength of Concrete f’c = 210 kg/cm² with Coarse Aggregate Substitution at 20%, 25%, and 30% Using Recycled Concrete (#960)
Read ArticleDate of Conference
July 16-18, 2025
Published In
"Engineering, Artificial Intelligence, and Sustainable Technologies in service of society"
Location of Conference
Mexico
Authors
Alva Pajares, Luis Diego
Salazar Idrogo, Lily Elizabeth
Aguilar Aliaga, Orlando
Abstract
The present research project evaluates the compressive strength of concrete f’c = 210 kg/cm², using recycled concrete coarse aggregate (RCCA) sourced from demolition waste at substitution rates of 20%, 25%, and 30%. The physical-mechanical properties of both RCCA and natural aggregate were determined, followed by mix design using the ACI method. The experimental design included a control group (base concrete) and three experimental groups tested at 7, 14, 21, and 28 days. A total of 96 cylindrical specimens were analyzed. Results showed that RCCA concrete surpassed the design strength f’c = 210 kg/cm², achieving an average compressive strength of f’cr = 340.58 kg/cm² at 28 days, with increases of 9.48%, 17.81%, 15.29%, and 16.63% compared to the base concrete. These findings demonstrate that RCCA is viable for structural applications in construction.