Análisis comparativos de métodos de diseño de mezclas de un hormigón de alta resistencia conformado por agregados procedentes de la cantera de Pintag

Abstract

The following article reveals the design of a 60 MPa high strength concrete consisting of aggregates from the Pintag quarry under the application of different design methods for dosing (ACI Method, Fuller and Thompson Method and Optical Density Method). The investigation began with the characterization of the aggregates, results that were used in the designs for concrete dosing from different methods. During the experimental process, test mixtures prepared from the addition of water in the mixture and from the incorporation of a superplasticizer additive are mixed, in order to define the conformation of the mixture and reducing the water-cement ratio to obtain the resistance required respectively. In general, definitive mixtures are defined by varying the proportions of materials (coarse aggregate and fine aggregate) with the addition of Viscomix-Setmix superplasticizer additive to improve homogeneity conditions and decrease the amount of water in the mixture. In each mixture, representative samples of fresh concrete were obtained, in which settlement, temperature, density, air content, manufacturing and curing of cylindrical specimens were performed, and finally compression tests at ages 1, 3, 7 and 28 days, reaching at 28 days of required compressive strength of 72MPa.