Estudo da influência da energia e do reúso de amostras na compactação em solo saprolítico de filito.

Abstract

The aim of this study is to understand the behavior of the phyiiite rock's saprolite soil when compacted. In order to do this, samples of the soil from the city of Cuiaba and its surroundings in the state of Mato Grosso were used. Cuiaba is situated in a depression that is the beginning of the sedimentary basin of the Pantanal. This area is constituted by metamorphic rocks of the Cuiaba Group. This Group is formed mainly by Phyiiite and Metasandstone. The soil samples for this study were collected at the site of the construction of the Federal Justice building, at the north of Cuiaba near the top of a hill where the saprolite was in several stages due to weather conditions. The collected material had yellowish coloring. The compression tests were done with four levels of energy. In this study the soil used was in a state of dry hygroscopic humidity in air and was manually broken up in clumps. A second group of tests was done with samples used in the first series. As a preliminary result of this study it was observed that the curves of compaction can have several aspects different from the known pattern. The degraded soil with successive applications of different efforts that is tested with the same energy may not generate the same compacting curve. Studies on stability for applications in engineering are necessary. It was observed that with the increase in soil degradation, due to efforts, the specific mass that is apparently dry may diminish increasing expansion and compressibility.