Avaliação da resistência de um solo expansivo do Município de Paulista - PE melhorado com Cimento Portland.

Abstract

The following work approaches the method of soil improvement developed and made available to civil engineers. The technique in question refers to the improvement of soil characteristics through the addition of chemicals, with cement being one of the most frequently used. The use of the cement aims to increase the mechanical resistance of the soil and allow a greater durability. This is possible due to its agglutinating action, which allows cementation between soil particles. The properties acquired by cement stabilized soils are influenced by several factors, such as: soil type, amount of additive (cement content), conditions of application on site, moisture content and compaction, time and curing temperature. These aspects are mentioned and commented throughout the research. Thus, the main objective of this research is the use of the additive Portland cement type V of high initial resistance (CP V ARI) in order to make the performance of an expansive soil from the municipality of Paulista - PE more effective at mechanical and durability level. The additive was tested at three different contents (4, 6 and 8%) and at different dry unit weight (14, 15 and 16 kN / m³). The experimental stages evaluated the soil suitability and the change of its characteristics using granulometric analysis, Proctor compaction, consistency limits and simple compression. It was possible to conclude the characterization of the studied soil, it was analyzed that the soil is an inorganic clay of medium plasticity (CL) with low compressibility. The efficiency of the additive chosen was presented through the graphics, where it was shown that, for higher cement contents, the sample presents greater resistance to compression. For increased compaction, an increased on resistance is also observed. In addition, it was possible to observe that the reduction in the porosity of the compacted mixture promotes the increase of the resistance to simple compression of the soil-cement studied, independently of the amount of cement used.