Resilient Modulus Characteristics of Varying Percent of Reclaimed Asphalt Pavement

Utilization of reclaimed asphalt pavement (RAP) aggregate in highway projects has become common practice in the United States because it has considerable environmental and economical advantages. This study evaluates the resilient modulus (Mr) of a crushed RAP on its own, a basaltic virgin aggregate (VA) on its own as well as when the two are bended for use in pavement base and subbase courses. A series of laboratory tests were conducted to assess their fundamental properties including Mr. Test results show that under the same stress conditions, the resilient modulus of pure RAP is higher than that of VA. The factors influencing Mr are discussed and a model that captures the variation of Mr with stress level, water content and density is proposed. This model is capable of incorporating the effect of percent RAP on Mr. This Mr model will help engineers design roads using recycled materials more expediently, thereby aiding the profession’s march towards greener highways.

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• Corporate Authors:

  American Society of Civil Engineers

  Geo-Institute
  Reston, VA  United States  20191-4400
• Authors:
  • Song, Yonghui
  • Ooi, Phillip S K
• Conference:
  • GeoShanghai 2010 International Conference
  • Location: Shanghai , China
  • Date: 2010-6-3 to 2010-6-5
• Publication Date: 2010

Language

• English

Media Info

• Media Type: Print
• Features: Figures; References; Tables;
• Pagination: pp 43-50
• Monograph Title: Paving Materials and Pavement Analysis

Subject/Index Terms

• TRT Terms: Aggregates; Asphalt pavements; Laboratory tests; Modulus of resilience; Moisture content; Reclaimed asphalt pavements; Subbase (Pavements)
• Subject Areas: Highways; Materials; Pavements; I22: Design of Pavements, Railways and Guideways;

Filing Info

• Accession Number: 01207113
• Record Type: Publication
• ISBN: 9780784411049
• Files: TRIS
• Created Date: Oct 13 2010 2:53PM