Estudo da utilização da mistura solo e lodo das estações de tratamento de água e esgoto para aplicação em base e sub-base na pavimentação.

Abstract

The sludge that is generated due to the operation of the Water and Sewage Treatment Stations is noted for being a semi-solid material that has in its composition constituents that are dangerous to the environment, such as heavy metals and pathogenic pollutants. The most common solutions for the disposal of this waste in Brazil are to send it to landfills and, in some cases, are applied to rivers, which stands out for being highly harmful to the environment. In view of the above, the application of these residues for paving is emphasized as an alternative for using the residue. The present work had as objective to study the feasibility of application of the residues of the stations in base and sub-base layers of the paving with the use of the stabilization technique. The methodology adopted for the research took place through tests for the physical characterization of materials based on technical standards and subsequently, compaction tests and the California Support Index were performed for the contents of 5% and 10% of the residues, for qualitative analysis of the use of additives to apply the mixture in base and sub-base layers of floors a bibliographic review was carried out. This work is known that the soil stabilized with the sludge from the water treatment plant presents better results in terms of resistance compared to the stabilization with the sludge from the sewage treatment plant. From the review of academic papers, it was verified that both residues showed potential for chemical stabilization and are characterized as an alternative to the use of the residue for use in paving.