Melhoramento de solos com pó de vidro e cal: comparação entre o comportamento mecânico do solo vermelho e do solo rosa da formação Guabirotuba

Abstract

The urbanization process in Brazil intensifies every year. Thus, there is a need to carry out new constructions and roads, but not all soils are suitable for such needs. Therefore, soil improvement aids in new construction só that the problematic soil does not become a deterrent to the project. Cement and lime are already used to carry out this procedure, but given the high costs of Portland cement and the environmental impacts, the use of residues for mechanical soil improvement has been considered. Glass dust is a waste from the industry and from the glass recycling process that has pozzolanic properties that are interesting for soil stabilization. The objective of this work is to evaluate the mechanical behavior of two soils with different physical characteristics and materials in face of the addition of glass powder and lime. Red soil is more clayey than pink soil, só pink soil has greater mechanical strength than red soil. The red soil was 140% more resistant as final mixtures than the pink soil in the simple compression tests and 200% more resistant to the tensile test by diametrical compression. Therefore, the two soils improved with lime and glass powder obtained a gain in mechanical strength, but each behaved in a unique way when faced with the additives.