Influência da umidade e energia de compactação na resistência à compressão de um solo laterítico com adição de cimento (solo-cimento)

Abstract

The work presented aims to study the soil improvement with the use of chemical stabilization making use of Portland cement as a primary agent for the modification of your properties. The residual soil come from the town of Cândido Godoi, Rio Grande do Sul. It also, proposes the methodology, analysis and discussion of the results and conclusions based on tests using soil-cement. The soil-cement, which is the result of compaction of soil, cement and water, is a technique widely used a round the world for stabilization of layers that have alow support level.The analysis of their behavior presents acertain complexity because it's affects by several factors, such as moisture and compaction energy. The samples were prepared as set for thin NBR12253/92 for the use of soil-cement paving, that delimit the necessary cement contente for that stabilized mixtures have, after 7 days of curing, compressive strength equal to or higher than the 2.1 Mpa and classified according to the MCT system for tropical soils which is based on a systematic of tests with the use of samples test with reduced dimensions.The soil used was characterized and classified and 10% cement contente adopted for the mixtures,it was established using ASTM suggestion. There were 5 variations soil-cement mixtures without addition of na additive used as are ference.The specimens, small size as established by MCT methodology, were cast for healing ages 7,28 and 56 days and subsequently underwent simple compression test. Research has indicated positive results as resistance to simple compression to the compacted soil-cement mixture in optimal conditions (optimum moisture content and maximum dry density). This reached values higher than 2.1 Mpa after 7days and cure.The moisture variations and compaction energy indicated decreases in resistance developed by the samples, proving to be inadequate and denoting the inefficiency of the process.