LOSS IN SERVICEABILITY OF PAVEMENTS DUE TO EXPANSIVE CLAY SUBGRADES

In Irbid City, Jordan, soil tests and pavement evaluations have shown that expansion of clay subgrade is a predominant problem, especially in the absence of effective drainage systems. Forty-one pavement sections from different parts of Irbid City were examined and tested. The Pavement Condition Index (PCI), as described by the US Army Corps of Engineers in the pavement evaluation system PAVER, was utilized in this study. This objective evaluation procedure depends on measuring the severity and density of every single distress observed. Physical and engineering properties were obtained from laboratory testing for the subgrade soil at each pavement section, including: Atterberg Limits, compaction characteristics, field density, natural water content, free swell, and unconfined compressive strength. The effect of soil properties on pavement conditions were investigated and the soil parameters that affect pavement deterioration were identified. Empirical regression models that correlate the loss in Pavement Condition Index (PCI) to soil properties were developed. (A)

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/10787275
• Corporate Authors:

  ASSOCIATION OF ENGINEERING GEOLOGISTS AND THE GEOLOGICAL SOCIETY OF AMERICA

  DEPARTMENT OF GEOLOGY & GEOPHYSICS, TEXAS A&M UNIVERSITY
  COLLEGE STATION, TEXAS  United States  77843-3115
• Authors:
  • AL-HOMOUD, A S
• Publication Date: 1997

Language

• English

Media Info

• Features: References;
• Pagination: p. 277-94
• Serial:
  • ENVIRONMENTAL & ENGINEERING GEOSCIENCE
  • Volume: 3
  • Issue Number: 1
  • Publisher: Texas A&M University, College Station
  • ISSN: 1078-7275

Subject/Index Terms

• TRT Terms: Clay; Deterioration; Mathematical analysis; Pavements; Soil mechanics; Subgrade (Pavements); Swelling soils
• ITRD Terms: 6471: Analysis (math); 4177: Clay; 5255: Deterioration; 2955: Pavement; 5755: Soil mechanics; 2950: Subgrade; 5203: Swelling (soil)
• Subject Areas: Geotechnology; Highways; Pavements;

Filing Info

• Accession Number: 00757375
• Record Type: Publication
• Source Agency: Transport Research Laboratory
• Files: ITRD
• Created Date: Dec 17 1998 12:00AM