Evaluación de la resistencia a compresión y módulo elástico del hormigón simple con adición de granito triturado como reemplazo parcial del agregado fino

Abstract

The purpose of this experimental investigation was to evaluate the influence of the partial replacement of fine aggregate by crushed granite on the mechanical properties of plain concrete, focusing on compressive strength and static modulus of elasticity. For this purpose, mixtures with replacement percentages of ten, fifteen and twenty percent were prepared and compared with a standard mixture without granite addition, using a dosage designed to achieve a characteristic strength of two hundred and forty kilograms per square centimeter. Throughout the study, laboratory tests were carried out to characterize the materials used, such as granulometry, real density, absorption and moisture content of the fine aggregate. Tests were also carried out in the fresh state, including workability, slump and density, as well as tests in the hardened state, such as compressive strength and modulus of elasticity. The results obtained showed that the use of crushed granite as a partial replacement of the fine aggregate, in controlled proportions, did not generate negative effects on the workability of the concrete in its fresh state. Likewise, the mix with a fifteen percent replacement evidenced a superior mechanical performance, reaching higher levels of compressive strength and modulus of elasticity compared to the standard mix. This behavior suggests that this replacement ratio optimizes the stiffness and strength of plain concrete, positioning it as a technically effective alternative within the parameters established for structural design.