Estudo dos materiais de solo-cimento-cal e solo-cimento-cal pozolânica para uso em habitação popular.

Abstract

This work proposes a comparative study of the mixtures of soil-cement, soil-cement-lime and soil-cement-lime pozzolana with the objective to make bricks at manual press for to be used at houses of low costs. The percentage of cement is replaced by lime ande lime pozzolana cement at several proportions in order to verify the mechanical performance of these mixtures. The two soils were selected from soils commonly used at local engineering works. The results of the tests with theses mixtures show a improvement of the properties after addition of lime and lime pozzolana cement mainly the simple compression resistence of the bricks that exhibits a increase significant when are compared with those obtained at cylindrical samples. It was realized a statistical study through simple linear regression between the time (t), obtained from PUNDIT ultrasonic apparatus and simple compression resistence of the cylindrical samples and was attained high level of correlation. It was observed that the use of the lime and pozzolana lime cement in partial substitution of Portland cement improve beyond the simple compression resistence the external surface of the bricks given a better appearance. The results permit to conclude that is possible the substitution of part of the Portland cement by lime and lime pozzolana cement and to make bricks of very good quality at lower price.