Análisis comparativo de las propiedades mecánicas de un hormigón hidráulico (TIPO GU) de F´C = 240 kg/cm2 con diferentes dosificaciones de silicato de sodio y nanosílice utilizando agregados de la mina Santa Isabel ubicado en la via Shell – madre tierra, ciudad de Puyo – provincia de Pastaza

Abstract

This paper has been carried out in order to determine the influence of sodium silicate and nanosilica as partial substitutes for cement on the compressive strength of concrete and its performance in the mix design. Initially it was carried out the analysis of the physical-mechanical properties of the stone aggregates from the Santa Isabel Mine located on the Shell - Madre Tierra road in Puyo city, Pastaza Province, from which good results were obtained that comply with NTE INEN and ASTM standards. After an investigation of these two additions, the standard concrete dosage of compressive strength of 240 kilograms per square centimeter was carried out, and it was used as a reference for partially replacing the cement with sodium silicate in concentrations at 4 per cent, 8 per cent and 12 per cent and nanosilica at 1 per cent, 3 per cent and 5 per cent. The respective specimens were prepared with each of the additions and tested for compression at 7, 14 and 28 days. It was determined that the optimum addition of sodium silicate was 8 per cent and of nanosilica was 3 per cent with compressive strengths of 276.58 kilograms per square centimeter and 355.31 kilograms per square centimeter respectively, both measured at 28 days, denoting a considerable increase in compressive strength from the reference value. After analyzing the variables of resistance, settlement, consistency and workability, it was determined that the best performing addition and with economic savings in construction is the addition with 3 per cent of nanosilica.