Estabilização de um solo típico do município de Erechim/RS com cal e resíduo agrícola para utilização no subleito de pavimentos

Abstract

The presente study analyzes the addition of hydrated lime and agricultural residue in a typical soil in the municipality of Erechim/RS, aiming its stabilization for use in pavement subgrade. This tecnique of soil improvement, promises to imply the physical and mecanical properties of soil, such as excessive plasticity, expansion and resistance. In addition, it provides the utilization of local soil and agricultural waste. For this purpose, the contents of 2 and 4% of lime and of soybean husk were added to the soil, resulting in two compounds that were subjected to the compaction and resistance to simple compression tests. The contentes, respectively, resulted in an increase of 57,89 % and 13,56 % in soil resistance, however it was the 2 % contente that showed a significant increase of 57,89 % in the initial soil resistance. This is due to the molding of the specimens in optimun humidity, the non-variation of the application energy during compaction, the hydration reactions of lime and the concentration os lignina and hemicelulose presente in the cell wall of the soybean hull. Therefore, based on the result obtained, it can be said that the addition of lime and soybean husk to the soil has significant effects for soil stabilization, and can be used in paving works as a method of physical-chemical stabilization of the subgrade. [resumo fornecido pelo autor]