Análisis comparativo de la resistencia del hormigón con agregados de las minas ubicadas en Santa Isabel y Paute de la Provincia del Azuay

Abstract

One of the challenges in road construction is related to the quantity of materials needed for pavements, the quality of the products, and the arrangement of construction processes. This research aims to analyze the impact on the strength of concrete using aggregates from mines located in Santa Isabel and Paute in the province of Azuay, based on the properties and test of the materials. The research focuses on evaluating the impact of aggregates from the Santa Isabel and Paute mines on the strength of concrete. A literature review was conducted on the aggregates testing, the Fuller-Thompson design method, and compression and bending tests. The results showed that the aggregates from the Paute River exhibit higher porosity (5.48%) than those from the Jubones River (4.025%). The Fuller-Thompson method was used to optimize the distribution of aggregates in the mix. Eighteen concrete specimens (nine of each type of aggregate) were manufactured using two different water/cement ratios. The compression tests revealed that the optimal water/cement ratio for the aggregates from the Paute River was 0.36, achieving 35 MPa, while for the Jubones River aggregates, it was 0.33, reaching 30.23 MPa. This can be attributed to an inadequate grain size distribution. In the bending tests, the aggregates from the Paute River met the standards, in contrast to those from the Jubones River, which did not meet the required specifications.