Comparison of the Modulus of Elasticity Values of Mortar Specimens with Crumb Rubber Replacing Sand by 10%, 15%, and 20% Before and After Heating at 150 ℃
Received: 26 August 2025 | Revised: 24 September 2025 | Accepted: 6 October 2025 | Online: 8 December 2025
Corresponding author: Imrianti
Abstract
This study investigates the use of waste tires, specifically crumb rubber, as a substitute for sand in mortar compositions. The performance of its mechanical properties is analyzed by measuring the modulus of elasticity of normal mortar specimens and rubber crumb mortar with 10%, 15%, and 20% variations, under normal conditions and after heating to 150 °C. The research method uses a 14-sample experimental design to test the cylinder compressive strength. Data were analyzed using qualitative descriptive statistics. The results indicate that the elastic modulus of crumb rubber mortar specimens with 10%, 15%, and 20% content is lower before and after heating to 150°C, exhibiting higher elasticity at 14 days. Conversely, the elastic modulus of 10% crumb rubber mortar before heating exhibits superior elasticity, durability, and increased deformation compared to normal mortar and other mortar variations after 28 days. These findings provide new knowledge about using crumb rubber as a mortar additive in sustainable construction and promote the innovative use of recycled materials.
Keywords:
crumb rubber mortar mechanical properties, modulus of elasticity, sustainable material, recycled materialsDownloads
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Copyright (c) 2025 Marson Maizi, Hartawan, Nasruddin, Imrianti

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