Physical and Mechanical Properties of Sustainable Bricks with Recycled Rubber for Load-Bearing Walls in Confined Masonry (#1872)

Authors

Quispe Turpo, Alexandra

Chuctaya Kana, Judith

Abstract

This study evaluates the feasibility of bricks with recycled rubber for use in load-bearing walls of confined masonry in Arequipa, Peru. Proportions of 3%, 8%, and 13% rubber powder and 5%, 15%, and 25% rubber granules were incorporated into a clay mixture. The bricks were manufactured following current regulations and subjected to tests for dimensional variation, warping, water absorption, and compressive strength, in accordance with NTP 339.613 and NTP 339.604 standards. The results indicate that recycled rubber increases porosity, enhancing thermal and acoustic insulation but reducing compressive strength. Only bricks with 3% rubber powder and 5% granules met the minimum requirement of 130 kg/cm². All bricks complied with the regulatory limits for dimensional variation, warping, and water absorption (≤ 22%). It is concluded that bricks with low proportions of recycled rubber offer adequate structural performance and promote sustainability by reusing discarded tires. However, higher rubber content compromises structural capacity. The economic analysis supports their feasibility as a promising alternative for more sustainable construction.