Incorporação de resíduos da construção civil em solo-cimento autoadensável aplicado em alvenaria de vedação

Abstract

The construction department, in the last years has been encouraging the research of new techniques that bring less impact in the enviroment and also are economically viable. This thesis looks for the understanding of the incorporation of construction sediments in self-compacting soil-cement bricks (ecological bricks) to use in sealing walls. For such purpose, has been done four different recipes, that the soil was replaced for construction sediments in measures of 0%, 20%, 30% and 40% and has been done the study of the fresh self-compacted soil-cement, verifying its workability, self-compacting and presence of exudation and segregation from the tests of spreading, j-ring test and V funnel test. Also was studied the behavior of the blend in a hardened way, from the tests of analisys of water absortion and compression resistence of the bricks. The resulsts showed that the blends has properly behaved in their fresh way, endowing a well workability and facilitating the bricks' production. In the hardened way, the results showed that the insertion of construction sediments in the bricks, has increased the percentual of water absortion, where all the recipes has exceeded the established limit of 20%. To the compression resistence results, only the TJ-04 recipe (with 60% of soil and 40% of Construction Sediments) has reached a resistence over 2 MPa like has been determinated by the Standard. Therefore, based in those results and trhough the parameters arranged in the NBR 8491 (ABNT, 2012), none of the recipes of this research could be used as sealing bricks, since they are disapproved in the parameters of water absortion and minimal compression resistence after their 7 (seven) days of curing process.