Resistencia a la compresión del hormigón simple fabricado con agregado fino proveniente de hormigones reciclados

Abstract

The integration of recycled materials in the manufacture of concrete is presented as a viable alternative to mitigate the environmental impact of the construction industry. In this study, we seek to determine the optimal percentage of substitution of recycled fine aggregate in concrete in place of natural fine aggregate, focus ing on evaluating its impact on compressive strength. The recycled material was obtained from a crushing process of laboratory specimens, sidewalk debris and curbs; both recycled aggregate and natural aggregates were subjected to analysis according to INEN standards, then the design of concrete dosages of 210 kg/cm2 and 240 kg/cm2 was carried out using the Optimal Density Method developed by the Central University of Ecuador. Subsequently, reference specimens were prepared using natural materials to compare their resistance with specimens in which the natural fine aggregate was replaced by recycled fine aggregate in percentages of 10, 15, 30, 30, 60 and 100 percent. The results show that there is a decrease in the compressive strength as the percentage of recycled fine aggregate increases. However, it is observed that replacement percentages of 10 to 30 percent can provide acceptable compressive strengths. This highli ghts the potential of recycled materials for concrete manufacturing as a promising solution to reduce environmental impact, provided that their limitations are considered.