Estabilização de solos finos utilizando cal hidratada

Abstract

Unpaved roads account for over 80% of the road network in the country. By presenting a large rural area, most roads in the city of Alegrete RS-rural roads are unpaved. In Alegrete mesh exceeds the length of the 5,000 km. As the city's economy revolves around the rice planting, stems heavy traffic at harvest time. If there is no satisfactory technological control of material selection, or execution of the roads themselves, these roads suffer accelerated deterioration affecting the normal flow of traffic. This paper aims to examine the effect of adding lime as a stabilizer in soils derived and commonly occurring in the municipality of Alegrete / RS. This is for the purpose of improving the mechanical properties of soils when used in the construction of primary coating layer and layer of asphalt paving. Thus initially were executed for natural soils geotechnical characterization, such as particle size, Atterberg limits, grain density and total volatile solids. To study the soil-lime mixtures were adopted levels of 0%, 5%, 8% and 10% hydrated lime relative to the ground dry. After that, we run the compaction tests, unconfined compressive strength, expansion tests and assays Index Support California. The study showed that the addition of lime in the soils gave a reduction in specific weight and an increase in the optimum moisture content. In addition, there was an increase in the compressive strength, increased California bearing ratio and reduced expandability.