Rodrigues, Roger Augustode Lollo, Jose Augusto2014-05-202014-05-202007-05-01Bulletin of Engineering Geology and the Environment. Heidelberg: Springer Heidelberg, v. 66, n. 2, p. 215-223, 2007.1435-9529http://hdl.handle.net/11449/39435In the studied region, 35% of the soil collapses are related to leakage from sewage ducts. The paper describes the soils from this part of Brazil and a series of laboratory tests undertaken using water and domestic sewage fluid as the wetting agents. It is considered that the presence of soaps and detergents as recorded by the sodium concentration facilitates the densification of the soils and hence has a major effect on the surface settlement/collapse.215-223engtropical soilscollapsible soilsdomestic sewagescanning electric microscopyconsolidation testArtigo10.1007/s10064-006-0065-yWOS:000246094600010Acesso restrito898767764404124786563030550404960000-0001-7534-9619