Estudo da estabilização de um solo da formação botucatu com adição de cal e cinza volante

Abstract

The aim of this study was to evaluate, through laboratory tests, the stabilization of a Botucatu formation soil by verifying the feasibility of using lime (CH-II Dolomítica) and fly ash from the city of Candiota - RS by Presidente Médici Thermoelectric Power Plant. The residual soil has its origin a localized reservoir inAlegrete-RS. Soil characterization tests were conducted; according to the Unified classification the soil belongs to ML group, according to the Road classification fits as A - 4, already in the MCT experiment entered the NA' group, Physical-chemical tests being determined the content of 92% of soil + 8% of Cal or CV, or using 92% of soil + 4% of CV + 4% of Cal; Mini-Proctor assay was found to optimum moisture and specific mass of each mixture. For the Simple Compression Test were molded 5x10 cylindrical specimens where they were placed to cure for 28 days, has been resistance of 2.1 MPa. Diametral Compression tensile tests were carried out in which the specimens were molded by the Marshall compactor with a diameter of 10 cm and a height of 5.6 cm (± 0.2 cm). It was verified the behavior of the mixtures, when found in an environment of total saturation, mixtures containing lime were the only ones that presented resistance characteristic for this medium. The research did not reach the goal of 2.1 MPa according to NBR 12253/2012 of soil-cement. However, the use of lime and fly ash showed increase in the modulus of Elasticity, thus reducing its deformations, besides possibilite its use in saturation.