Análisis comparativo del peso y resistencia a compresión del hormigón convencional con un hormigón ligero de piedra pómez para una resistencia de diseño a compresión de F'C= 240 KG/CM^2 con diferentes porcentajes de aditivo superplastificante

Abstract

The purpose of the proposed experimental work is to determine the influence of pumice stone and superplasticizer additive in different percentages on the properties of density and compressive strength. To begin with, the materials to be used were gathered: the stone aggregates were obtained from different places of origin, fine aggregate (sand) from Salcedo, normal density coarse aggregate (gravel TMN=19 mm) from Ambato and low density coarse aggregate (pumice TMN=19 mm) from Latacunga, superplasticizer additive and cement type GU. After the materials were collected at the FICM Materials Testing Laboratory, they were tested according to INEN and ASTM standards. Next, the dosage was carried out according to ACI Method 211.1 and 211.2 for Conventional and Lightweight Concrete respectively for a design compressive strength of 240 kg/cm2 with the addition of percentages of 0, 0.8 and 1 percent of superplasticizer additive after investigation and recommendation of the manufacturer. Cylindrical specimens were prepared for each type of concrete with the proposed percentages of admixture and tested in compression at 7, 14 and 28 days of age. It was established that the optimum percentage of superplasticizing admixture is 1 percent for both conventional and lightweight concrete with densities and compressive strengths at 28 days of (2208.22 and 1561.42 Kg/m3) and (311.60 and 177.87 Kg/cm2) respectively.