Analysis of geotechnical properties in soil, reclaimed asphalt pavement (RAP) and Portland cement mixtures for use as pavement layers
Análise de propriedades geotécnicas em misturas de solo, material asfáltico fresado e cimento Portland para utilização como camadas do pavimento
DOI:
https://doi.org/10.5016/geociencias.v43i2.18256Resumen
A study is presented of mixes of fine soil and reclaimed asphalt pavement in the contents of 20, 30 and 50% with and without the addition of 5% Portland cement. The experimental program involved a battery of tests which found that the addition of up to 50% RAP alters the granulometry, increases the maximum dry density, bearing capacity and permeability, reduces plasticity, optimum moisture and expansion. The addition of 5% cement caused strong granulometric changes with an increase in the bearing capacity, reduced expansion and permeability. The compressive strength was below the required, but with considerable tensile strength and durability. Plasticity was presented as the greatest impediment to the use of mixes in view of the requirements of technical standards. However, it was found that the RAP is promising in improving soil properties and as a material to be applied in paving.