Avaliação ambiental da utilização de solo contaminado por derivados de petróleo (SCDP) em misturas asfálticas

Abstract

With the need for a proper final disposal for different wastes, its use as a pavement material comes about as a potential alternative. This study investigates the feasibility of the use of soil contaminated by petroleum products (SCPP) in sand asphalt mixtures prepared with 30% of SCPP by weight. Environmental aspects of the mixtures were assessed using the following tests: (i) X-ray fluorescence, (ii) leaching (NBR –10,005), and (iii) solubilization (NBR –10,006). The hazardous substances encapsulation was verified by adding lime to the investigatedmixtures. The residues samples were evaluated in two ways: pure and using asphalt mixtures designed with this waste material. The mixtures were also investigated with respect to its mechanical properties using tests such as resilient modulus, indirect tensile strength and fatigue life. According to the mechanical and environmental tests results, the use of SCPP in sand asphalt mixtures can be a reasonable option, since, besides the fact that these mixtures presented satisfactory mechanical properties, thisSCPP destination is environmentally feasible and less expensive.