Small-scale recycling of plastic soils for trench fills using lime and/or cement treatment

In Belgium, we used to fill trenches for sewers and collectors with sand and/or cement-stabilized sand. Technically speaking, this is a very convenient solution. Sand is easy to compact and guarantees a stable fill for years, even in the presence of groundwater. However, it has become impossible nowadays to simply remove poor quality materials and replace them with sand, because of the environmental choices made by the politicians. Moreover, some of the removed soils are polluted and we do not wish to move them to another place because of contamination risks. We therefore have to reuse plastic soils like silt, clay and all intermediate families in filling trenches. These soils are inadequate from the technical point of view: they are very sensitive to water and more difficult to compact. Their natural moisture content ranges between 20 and more than 30 %. Fortunately, we can use treatment techniques with lime and cement that work very well with these types of soil. We now try to use lime-treated soils to replace sand and lime/cement-stabilized soils as substitutes for sand-cement mixtures, but some difficulties still remain for the moment.

Language

  • English

Media Info

  • Pagination: 13p
  • Monograph Title: First International Symposium on Subgrade Stabilisation and In Situ Pavement Recycling Using Cement, Salamanca, Spain, 1-4 October 2001

Subject/Index Terms

Filing Info

  • Accession Number: 01392473
  • Record Type: Publication
  • Source Agency: ARRB
  • ISBN: 8489875278
  • Files: ATRI
  • Created Date: Aug 23 2012 7:09AM