EFFECTS OF COARSE AGGREGATE ON CONCRETE PAVEMENT PERFORMANCE

The current AASHTO Guide for Design of Pavement Structures ignores the effect of concrete material properties on pavement performance except for the strength and modulus of elasticity. Actual field performance of, and academic research on, concrete pavement shows that major distresses in continuously reinforced concrete pavement are not only related to the two properties included in the Guide. Rather, they are also related to other concrete material properties which are significantly influenced by the coarse aggregates used in concrete. To improve concrete pavement performance it is necessary to include the effect of coarse aggregates on concrete properties and pavement performance in the pavement design and construction specifications. Strong evidence suggests that the proper selection of coarse aggregate will enhance concrete pavement performance considerably, reducing costs to tax payers. If state highway agencies (SHAs) determine that the increased pavement repair costs resulting from the improper selection of coarse aggregate type exceeds the costs associated with implementing proper aggregate selection procedures, SHAs may decide to develop and implement aggregate selection procedures. Or, SHAs might move towards warranty specifications. In preparation for those possibilities, the aggregate industry needs to continue research in this area.

• Supplemental Notes:
  • Full conference proceedings available on CD-ROM.
• Corporate Authors:

  University of Texas, Austin

  International Center for Aggregates Research, 3208 Red River
  Austin, TX  United States  78705-2650

  Texas A&M University, College Station

  Faculty Exchange Box H
  College Station, TX  United States  77843
• Authors:
  • Won, M
• Conference:
  • International Center for Aggregates Research 9th Annual Symposium: Aggregates - Concrete, Bases and Fines
  • Location: Austin, Texas
  • Date: 2001-4-22 to 2001-4-25
• Publication Date: 2001

Language

• English

Media Info

• Features: Figures; References;
• Pagination: 20p

Subject/Index Terms

• TRT Terms: Coarse aggregates; Concrete pavements; Continuously reinforced concrete pavements; Modulus of elasticity; Pavement distress; Pavement performance; Properties of materials; Strength of materials
• Subject Areas: Design; Geotechnology; Highways; Materials; Pavements; I22: Design of Pavements, Railways and Guideways; I23: Properties of Road Surfaces; I32: Concrete; I36: Aggregates;

Filing Info

• Accession Number: 00983583
• Record Type: Publication
• Report/Paper Numbers: Final Draft
• Files: TRIS
• Created Date: Dec 27 2004 12:00AM