Correlación entre el cambio de resistencia a compresión simple y módulo de elasticidad de núcleos de hormigón extraídos de diámetros 4’’, 3’’, 2’’y 1 1/4’’ con diferentes tamaños de agregado grueso máximo

Abstract

The compressive strength of cores varies by factors such as the size of the coarse aggregate that constitutes the concrete with respect to the diameter of the core. This study shows the influence of the maximum size of the coarse aggregate of concrete on the resistance to simple compression and modulus of elasticity in cores of diameters: 1-1 / 4 '', 2 '', 3 '' and 4 '', it was compared the results of these parameters with cylinders established by standards. For which the casting of 4 samples composed of coarse aggregate of 3/8 '', 3/4 '', 1-1 / 2 '' and 2 '' and the same type of fine aggregate was carried out; These materials were characterized through laboratory tests to carry out the dosage of each sample, in order to achieve a compressive strength of 20.6 MPa at 28 days. A total of 220 samples were obtained for tests of compressive strength and modulus of elasticity. Once the tests had been carried out, it was found that the resistance results of the cores differed with the results of the cylinders for each size of coarse aggregate at different ages and that the larger the size of coarse aggregate and the larger the diameter of the core, the lower the percentage of variation of the modulus of elasticity.