Evaluación del efecto de la matriz cementante en el módulo de elasticidad del hormigón, empleando agregados obtenidos de las minas: San Antonio, Guayllabamba, Pintag y Pifo

Abstract

For several years, NEC has used equations based on the modulus of elasticity obtained from ACI. These equations have been investigated and adjusted to meet the requirements of each study area. However, due to the lack of information on the relationship between the concrete elasticity module and the cement matrix, this article compared the elasticity modules of four mines and four different cement types for a strength of 24MPa. The mine aggregates were characterized and 16 concrete mixtures with water/cement ratios of 0.488 and 0.502 were made. Several a/c ratios for cement pulp were also taken into account. The result was a maximum single compression strength of 57.36 MPa. Using strain gauges, the elasticity modules of the pastes were obtained with the different types of cement. When comparing the theoretical and experimental values of the modulus of elasticity, it was observed that they do not differ much from each other. In addition, it was verified that the lower a/c ratio, the higher the modulus of elasticity of the cement paste, regardless of the type of cement. It was also observed that the behavior of cement paste is linear and that GU type cement has a better behavior. However, in conjunction with concrete, HE type cement provides greater strength.