Cement-Modified Soil for Long Lasting Pavements

Cement-modified soil (CMS) is a term used to describe native soils and/or manufactured aggregates that have been treated with a relatively small proportion of portland cement. Cement application rates for CMS typically vary from two to six percent by dry weight of the soil/aggregate being modified with the majority of cases being between three and five percent. The objective of the treatment is to permanently amend the undesirable properties of problem soils/aggregates so that they are suitable for use in construction. Laboratory and field work on CMS indicate that the relatively small quantities of cement bind some of the soil/aggregate particles together to form small conglomerate masses of new soil/aggregate. In addition to this slight cementing reaction, the surface chemistry of clay particles, either in clay soils or the clay fraction of granular soils, is improved by cation exchange phenomenon. As a result, the modified soils/aggregates have lower plasticity (cohesiveness), lower volume change characteristics, and greater strength than untreated soils/aggregates. Field and laboratory tests show that changes in the physical characteristics of a soil/aggregate by cement modification are permanent. The soil/aggregate does not revert back to its original state (even after many cycles or years of weathering and service), making CMS a very sustainable pavement material. This paper will look at the types of CMS available, their modification mechanisms, material properties, proper construction techniques, and longevity. For the covering abstract of this conference see record control number 201111RT334E.

• Record URL:
  • https://www.tac-atc.ca/en/knowledge-centre/technical-resources-search/conference-papers/cement-modified-soil-for-long-lasting-pavements/
• Corporate Authors:

  Transportation Association of Canada (TAC)

  401-1111 Prince of Wales Drive
  Ottawa, Ontario  Canada 
• Authors:
  • HALSTED, GE
• Conference:
  • 2011 CONFERENCE AND EXHIBITION OF THE TRANSPORTATION ASSOCIATION OF CANADA. TRANSPORTATION SUCCESSES: LET'S BUILD ON THEM. 2011 Congress et Exhibition de l'Association des Transports du Canada. Les Succes en Transports: Une Tremplin vers l'Avenir
  • Location: Edmonton , Canada
  • Date: 2011-9-11 to 2011-9-14
• Publication Date: 2011

Language

• English

Media Info

• Media Type: Web
• Pagination: 13 p.
• Monograph Title: 2011 Conference and Exhibition of the Transportation Association of Canada - Transportation Successes: Let's Build on Them

Subject/Index Terms

• TRT Terms: Base course (Pavements); Cement; Conferences; Construction management; Durability; Properties of materials; Soil stabilization
• Geographic Terms: Canada
• ITRD Terms: 8018: Canada; 4758: Cement; 8525: Conference; 3666: Construction method; 5910: Durability; 5925: Properties; 2961: Roadbase; 3689: Soil stabilization
• Subject Areas: Geotechnology; Highways; I33: Other Materials used in Pavement Layers; I42: Soil Mechanics;

Filing Info

• Accession Number: 01360438
• Record Type: Publication
• Source Agency: Transportation Association of Canada (TAC)
• Files: ITRD, TAC
• Created Date: Jan 9 2012 11:39AM