Análisis de la influencia de la velocidad de carga, curado y tamaño del espécimen en la resistencia cilíndrica a compresión del hormigón

Abstract

This experimental work analyzes the influence of the application of different loading rates, types of curing and specimen size on the values of cylindrical compressive strength at ages 7, 14 and 28 days. For this purpose, aggregates were acquired from the Salvador Quarry located in the city of Ambato - Aguaján sector and Type GU Cement for subsequent characterization tests according to INEN and ASTM standards, then the dosage was carried out applying the Optimum Density Method for a concrete with a design strength of 210 kilograms over square centimeters. With the final dosage, 63 specimens were prepared to determine their properties in fresh and hardened state depending on the variables to be applied in each one of them. Regarding the results obtained for compressive strength at 28 days, at a speed of 0.475 MPa/s an increase of 7.07 percent was obtained, while for a speed of 0.025 MPa/s there was a decrease of 5.22 percent of the strength obtained at the standard speed. On the other hand, specimens not subjected to a curing process reach 86.15 percent of the compressive strength acquired by the specimens that were cured. Finally, with respect to specimen size, it was determined that 100x200 mm specimens acquired 8.88 percent more strength than 150x300 mm specimens.