FACTORS INFLUENCING MOISTURE CHANGES IN PAVEMENTS CONSTRUCTED ON EXPANSIVE CLAY SUBGRADES

Pavements constructed on expansive subgrades present special problems since moisture changes in the clay subgrade result in significant changes in the volume and engineering properties of the soil. Field and laboratory investigations have been undertaken in an attempt to determine firstly factors affecting moisture changes in a clay subgrade and secondly the effect moisture changes have on the performance of a pavement. The laboratory investigations included a study of the effect of initial moisture content on the infiltration and swelling properties of a clay soil. The paper considers the prediction of equilibrium moisture conditions from a site investigation of experimental pavements in Central Western Queensland and relates this to the optimum compaction moisture contents of pavement subgrades. The performance of several experimental pavements constructed on expansive clay subgrades in the Darling Downs is discussed.

• Record URL:
  http://arrbknowledge.com
• Corporate Authors:

  ARRB

  Melbourne, Victoria  Australia 
• Authors:
  • WATERS, T J
  • GRAY, W J
• Conference:
  • Australian Road Research Board Conference Proc
• Publication Date: 1976-8

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 24-38
• Serial:
  • Volume: 8
  • Issue Number: 8

Subject/Index Terms

• TRT Terms: Expansive clays; Experimental roads; Moisture content; Pavement performance; Properties of materials; Subgrade (Pavements); Swelling soils; Telephone influence factors
• Old TRIS Terms: Influence factors
• Subject Areas: Geotechnology; Highways; Materials;

Filing Info

• Accession Number: 00149487
• Record Type: Publication
• Files: TRIS
• Created Date: Apr 13 1977 12:00AM