Estudo da adição de resíduos da construção civil (rcc) para estabilização granulométrica de um solo da região do Vale do Araguaia, para fins de pavimentação

Abstract

Due to the increasing of the workaday activities of brazilian Civil Construction Industry (ICC) in the last years, there was an increase of exploitation of non-renewable energy resources as well as in the waste generation, bringing about basic sanitation problems, disease vectors proliferation, and waste management and disposal difficulties. In view of shortage of paving materials with suitable properties in some regions, a lot of researches are being developed to evaluate recycled materials behavior for paving purposes. The materials with the best functional performance are the recycled concrete aggregates (RCA), which composition is materials based on concretes, mortars and stone materials, presenting good homogeneity. This research aimed to evaluate the granulometric stabilization of an Araguaia valley region soil, adding RCA and verifying its capability for paving purposes. Were developed mixtures of soil-RCA with contents of 25, 50 and 75% of recycled material. Laboratorial tests were performed for mixtures characterization: granulometric analysis, consistency limits, compaction and California Bearing Ratio (CBR). Based on obtained results was verified soil stabilization efficiency with RCA add, resulting in mixtures with well graded particlesize distribution, low expansions value and increase of up 1375% of soil CBR value, which enable the material's use in subgrade reinforcement layers.