Impact of Specimen Geometry on Dynamic Modulus Measurement Test Setup

A new mechanistic-empirical pavement design guide to better predict the service life of pavement systems is in its final stages of validation. One of the new input parameters recommended for the design is the dynamic modulus of the asphalt concrete mixes. The developers of the design guide have developed a laboratory test setup that can provide this parameter. To verify the accuracy and precision of the proposed test setup, several synthetic specimens with known material properties and different length-to-diameter ratios were procured and tested. Since the new design guide advocates the use of specimens with length-to-diameter ratios of less than two, the utility of using end friction reducing layers between the specimen and the end platens were also evaluated. In the end, the hot mix asphalt concrete specimens were also prepared and tested. Overall, the test setup is precise and can be used for dynamic modulus measurement of asphalt concrete mixes. The results also suggest that the specimen geometry and the end friction reducing layers affect the accuracy and precision of estimated dynamic modulus.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/08991561
• Authors:
  • Tandon, Vivek
  • Bai, Xuequn
  • Nazarian, Soheil
• Publication Date: 2006-7

Language

• English

Media Info

• Media Type: Print
• Features: Figures; References; Tables;
• Pagination: pp 477-484
• Serial:
  • Journal of Materials in Civil Engineering
  • Volume: 18
  • Issue Number: 4
  • Publisher: American Society of Civil Engineers
  • ISSN: 0899-1561
  • EISSN: 1943-5533
  • Serial URL: http://ascelibrary.org/journal/jmcee7

Subject/Index Terms

• TRT Terms: Admixtures; Asphalt concrete pavements; Dynamic modulus of elasticity; Dynamic tests; Friction; Geometry; Hot mix asphalt; Laboratory tests; Measurement; Pavement design; Platens; Specimens; Statistical analysis
• Uncontrolled Terms: Design guide; Dynamic modulus test
• Subject Areas: Data and Information Technology; Highways; Materials; Pavements; I31: Bituminous Binders and Materials;

Filing Info

• Accession Number: 01031245
• Record Type: Publication
• Files: TRIS
• Created Date: Aug 23 2006 7:58AM