Classificação e estabilização de solos lateríticos do Estado da Paraíba e do Rio Grande do Norte.

Abstract

Brazil is a country with considerable portions of its territory in tropical area, thus there is a constant need for studies in search of more appropriate methods for evaluating the suitability of soil types regarding their use in flooring. This study aimed to study the chemical, physical and mechanical properties of two laterite soils of the Northeast region (SW / RN), classifying them in different methodologies (HRB, USCS, Methodology MCT) and stabilize them chemically with the addition lime. The procedure chosen for pilot implementation of the research consisted of: characterization of the physical, chemical and mechanical properties of soil and soil mixture with the addition of 3.0%, 4.5%, 6.0% and 7.5% lime. Regarding the classification, the soils are lateritic nature, since they have basically elements in its composition as Si, Fe and Al. CBRs values with the addition of lime changed, suggesting high gains in strength when compared with those obtained for soil in its natural state. Related to the results of the classification methodology MCT, the soil of the JSGA deposit was classified belonging to the class of sandy laterite (LA') and soil of JSM Reservoir was classified as belonging to the class of clay soils (LG'). It was concluded that the soil of JSGA Reservoir can be used as the base and the ground floor of the quarry JSM adding lime to increase the subgrade and / or reinforcement of subgrade since they are handled properly.