Estudo da viabilidade de fabricação de tijolos de solo-cimento com a adição de cinza de casca de arroz

Abstract

This work has the objective to realize an study of the technical viability of stabilizing a sandy soil of Alegrete/RS with addition of parts of rice husk ash (CCA) and Portland cement for the construction of bricks. Rice husk ash originates from the burning of the rice husk and is found great volume in the wild where it is often discarded in an inadequate manner, causing severe damage to the environment. In the state of Rio Grande do Sul this can be found in abundance due to the fact that it is one of the largest rice producers in the country. The aim of this study was to study and develop an experimental program for the production of soil-cement bricks using sandy soil from a reservoir located in the city of Alegrete, RS, with the use of different percentages of CCA as stabilizing agent. For the comparisons, soil moldings were carried out without the inclusion of stabilizing agent and moldings with different materials with different contents and, thus, compared and proved the performance of each trait studied. Physical and chemical characterization tests were carried out in different levels of the ash and cement, Mini Proctor (MCT) tests to determine the optimum soil mix, tests of resistance to simple compression (RCS) of the bricks in all the traits studied and absorption of water from bricks. The absorption results were satisfactory, while those of simple compressive strength were not adequate for the requirement of the standard.