Análisis de las propiedades físicas y mecánicas del residuo de caucho de neumático como reemplazo parcial del agregado fino en el hormigón

Abstract

The objective of this study is to evaluate the physical and mechanical properties of concrete with waste tire rubber (WTR) as a partial substitute for sand, considering local materials from the city of Cochabamba, Bolivia, to promote a circular economy. The sand was replaced by WTR (in volume) in four percentages: 0% (reference), 5%, 10%, and 20%, evaluating its mechanical properties (resistance to compression, traction, and bending) and physical properties (specific mass, water absorption, and void index). The results indicate that there is a tendency to decrease with a higher percentage of WTR, both for mechanical resistance and for physical properties, except for the mixture with 5% WTR, which had results comparable to concrete with natural sand. WTR can be used in the local production of concrete up to 5% without compromising its mechanical and physical properties, in addition to having a sustainable approach.

Comparative Analysis of Conventional Concrete Mixture and Concrete Incorporating Recycled Rubber and Iron Oxide

“…In a study conducted by [2], the viability of replacing fine aggregate with recycled rubber in different proportions in concrete is demonstrated without significantly affecting its compressive and flexural strength. [3] considered the possibility of replacing rubber for half of the total fine aggregate to promote the circular economy. In their tests, 5%, 10%, and 20% of the fine aggregate were replaced to evaluate the properties of the obtained samples, concluding that 5% recycled rubber does not alter the mechanical, physical, and chemical properties of the material.…”