ANÁLISE DA VARIAÇÃO DA RESISTÊNCIA A COMPRESSÃO SIMPLES DE UM SOLO PLÁSTICO ESTABILIZADO COM RESÍDUO DE GESSO ACARTONADO E CAL

Abstract

RESUMO: Diante do crescimento do consumo e da produção de chapas de gesso acartonado para uso em sistemas de drywall na construção civil, tem surgido a problemática da geração de resíduo do sistema produtivo, assim como o descarte inadequado. Além disso, surge a necessidade de melhoria dos solos usados para obras de pavimentação, que cada vez mais não se enquadram nas especificações técnicas brasileiras para uso em engenharia. O objetivo deste trabalho foi avaliar a viabilidade da estabilização de um solo plástico da Região Metropolitana do Cariri com o uso do resíduo das placas de gesso acartonado e cal hidratada para o emprego em camadas de base e sub-base de rodovias. A metodologia consistiu na realização de ensaios de caracterização do solo e do resíduo de gesso e caracterização mecânica das misturas de solo-gesso, solo-cal e ABSTRACT: In view of the growth in consumption and the production of cartoned sheets for use in drywall systems in civil construction, there was a problem with the generation of waste from the production system, as well as the used waste. In addition, the need to improve the soils used for paving works, which is increasingly falling outside Brazilian technical specifications for use in engineering. The objective of this work was to evaluate the feasibility of stabilizing a plastic soil in the Metropolitan Region of Cariri with the use of plasterboard and hydrated lime residues for use in base and sub-base strategies for highways. A methodology consisted of conducting soil characterization tests and plaster residue and mechanical characterization of mixtures of soil, plaster soil and soil of varying content or content of plaster residue (5%, 10% and 15%) and time curing time (0 and 14 days), the lime content remains constant (5%). It was observed that stabilization with plaster does not promote an increase in resistance, nor does it maintain the characteristics of the soil, on the contrary, or cause a reduction in resistance in the soil. However, when adding lime as soil mixtures, there was a significant strength gain. It was concluded, through tests carried out, that the stabilization of soil with plaster was not satisfactory from the point of view of mechanical resistance, although with the addition of lime as mixtures they present good mechanical behavior.