Determinación de la resistencia a compresión del hormigón adicionado árido de arcilla expandida (arlita) en sustitución parcial del agregado grueso

Abstract

The objective of the current experimental work is to analyze the results obtained by compression tests performed on simple concrete cylinders added light expanded clay aggregate in partial replacement of the coarse aggregate. As a first step, we execute the materials test like granulometric analysis, loose unit weight, compacted unit weight, specific weight and absorption capacity of the gravel, sand and expanded clay were carried out in compliance with the standards NTE INEN 857, INEN 696 and verifying that they are in the limit states established by ASTM C33. Later we proceeded to the calculation of the adequate dosing for a concrete of f'c = 210 kg/cm2 by means of the method of the Maximum Density hereby there were elaborated samples of simple concrete, mixing the arid one of clay expanded in proportions of 5 %, 10 %, 20 % and 30 % in replace of gravel, also in a substitution to the volume, taking 3 samples for every proportion. As last stage we realized the tests compression of the samples of concrete from 7, 14 and 28 days of age, obtaining vital information about the performance of the concrete and its different resistances, hereby there were established ideal percentages in which it was kept and increased the needed resistance, diminishing the specific weight of the concrete, due to the fact that the expanded clay possesses properties of lightness, besides of being a natural and ecological alternative in benefit of the environment.