Beneficios físico-mecánicos y análisis de sostenibilidad de hormigones porosos elaborados con materiales locales

Abstract

Internationally, the use and study of porous concretes have been widely developed due to the sustainable benefits they have shown to bring. However, there are very few local studies dedicated to this subject. This paper investigates the contrasts of producing permeable concrete using two types of aggregates from the province of Azuay: rounded river aggregate, crushed aggregate, and a combination of both. The study characterizes the aggregates and highlights the benefits of each mixture by analyzing slump, indirect tensile strength, percentage of interconnected voids, permeability, and CO2 emissions. In addition, standard mixtures of conventional concrete were prepared using each type of aggregate to compare the advantages and disadvantages of the permeable samples. In order to thoroughly analyze the impact of the aggregate in each mixture, we maintained the same water-cement ratio and percentage of admixture. For the permeable mixes, only the percentage of cement paste (cement, water, and admixture) was varied, while the inclusion of fine aggregate was excluded. After the study, it was determined that the concrete with the best performance was the one made with coarse crushed aggregate. However, it was also found that incorporating a portion of coarse rounded river aggregate can enhance strength without significantly reducing permeability or slump, or impacting emissions.