Avaliação do uso de emulsão asfáltica na estabilização química de três solos de Sergipe.

Abstract

In the States of North and Northeast from Brazil, already exist a great scarcity of materials of the good quality for the construction road pavements, mainly in the respect to soils in accordance with to road traditions specifications for layers of base and under base, wich raise the costs and sometimes make economically unfeasible the execution of works this type, fundamentals like terrestrial transportation. This way, the search for technologic solutions that reduce the constructive costs of road works, principally those with low traffic volume, it’s very important for flowing of the agricultural products, from origin to the big cities, is fundamental for to promote the regional developing and to facilitate the transportation of products and peoples with comfort and security. The use of asphalt emulsion as agglutinant and modifier agent of soils properties, can be a technical solution for it became same soils, out of process, able to be used in pavements. In this work, was to evaluate the technical viability of the soil stabilization with asphalt emulsion applied in some common soils in region, one sandy , one clayey and one intermediate. The three selected soils, wich are typically founded in the area at Sergipe State, was submitted to mixtures with asphalt emulsion of type RL-1C, in rates of emulsion between 2% and 8%. After the curing condition established, the pure soils and mixtures soil-emulsion properties were evaluated and compared through the Unconfined Compression Test, Tensile Strength by Diametral Compression, California Bearing Ratio and the Resilient Modulus Test. The results indicate that the asphalt emulsion promoted improvements in properties of soils, however it was found that the rate of emulsion for to stabilize soils is dependent of soil type and of the cure conditions mixtures. Finally, the satisfactory quantities emulsion for to stabilize the sandy soil was situated between 4% and 6%, larger than rates emulsion wich promoted to stabilization of the clayey soils, in this case, between 2% and 4%.