Estabilização de solos lateríticos com cal: avaliação por um processo de cura acelerado.

Abstract

This dissertation presents the results of a research developed with the objective of evaluating the effect of lime on resistance to simple compression, (RCS) of several soils lateritic. For that, five lateritic soils from the state of Paraíba were selected and, the RCS determined with the soils in the natural state and after stabilized with the optimal percentage of lime, equal to 6%. The soils were subjected to a normal curing process at a temperature of 22 ° C ± 2 ° C and humidity of 100% (saturated chamber) for 3, 7 and 28 days and, also submitted to the accelerated curing process in an air-conditioned chamber, under different temperature combinations (40 ° C, 60 ° C) and humidity of (80%, 95%) for 4, 8 and 24 hours. The results obtained allowed to conclude that the equations used to define the apparent specific mass maximum drought and optimum humidity for comparison of stabilized soils, resulted in specimens with excellent reproducibility. On the other hand, soils responded favorable to the treatment with lime, strengthening the results for the analysis, including serving to define a "peak" in the stress-strain curve. Regarding the accelerated curing process, the results showed that there is an optimal condition - accelerated curing, since the results in terms of RCS were compatible with those obtained with the normal curing process. It was found that the optimum condition of accelerated curing for the studied soils corresponded to 24 hours in an air-conditioned chamber at 40 ° C and 80% humidity.