Estudo da estabilização de solo argiloso com cal

Abstract

In the context of civil engineering, soil is a widely used construction and support material. However, in nature, it does not always reach the resistance values required to execute different types of projects. In these cases, it is essential to consider the possibility of seeking alternative solutions. These solutions consist of exploring new areas, as well as improving existing soil, through the insertion of chemical agents, such as cement and lime. Therefore, the present study aims to evaluate chemical stabilization through the insertion of 8% lime into the clayey soil of Campo Mourão. To this end, tests of particle size analysis, real grain mass, x-ray fluorescence, dosing pH method, compaction and unconfined compressive strength test (UCS) were carried out, evaluating curing times of 3, 7 and 28 days, considering the experimental conditions with and without immersion of the specimens in water. From the results, it was observed that the pH method was not efficient in obtaining the amount of lime necessary to stabilize the soil, due to the significant presence of iron and aluminum in the material. In relation to compaction, the inclusion of lime caused the maximum apparent dry mass to decrease and the optimum moisture content to increase, due to the low density of the lime and its high specific surface. In relation to RCS, it can be observed that the resistance increased with the inclusion of lime and the curing periods did not influence the response, with constant values after 3 days.