TESTING AND EVALUATION OF IMPROVED TYPE A ASPHALTIC CONCRETE

A total of eight improved type A asphaltic concrete mixes were characterized using Marshall test specimens. Tests determined resilient modulus and incremental creep compliance. Temperature dependent behavior was considered by conducting laboratory tests at 50, 70 amd 100 deg F. Incremental creep compliance data were used to compute Alpha and Gnu. These parameters control rutting performance in the VESYS-3-A computer model used in evaluating asphaltic concrete pavement performance in this study. The computer model pavement section was the 5-in. asphaltic concrete pavement located north of Elmwood, Nebraska. Based on VESYS-3-A estimates of service life having a 50% reliability, mix AX was superior with a modelled service life in excess of 20.0 years and a final rut depth of 0.40 in. However, mix AX developed extensive fatigue cracking after only eight years. Mixes A3, A1 and A5 were practically equivalent with modelled lives of 9.4, 9.0 and 8.9 years, respectively. Estimated rut depths were 0.76, 0.79 and 0.80 in. after 10 years. Mixes A4 and A2 had lives of 8.6 and 6.0 years, respectively.

• Corporate Authors:

  University of Nebraska, Omaha

  Department of Civil Engineering, 6001 Dodge Street
  Omaha, NE  United States  68182-0178

  Nebraska Department of Roads

  1500 Highway 2, P.O. Box 94759
  Lincoln, NE  United States  68509
• Authors:
  • Sneddon, R V
• Publication Date: 1991-7

Media Info

• Features: Appendices; Figures; References; Tables;
• Pagination: 28 p.

Subject/Index Terms

• TRT Terms: Asphalt concrete; Creep; Fatigue (Mechanics); Laboratory tests; Mix design; Modulus of resilience; Pavement cracking; Pavement performance; Ruts (Pavements); Rutting; Service life; Simulation; Temperature
• Uncontrolled Terms: Rut; Rut depth
• Old TRIS Terms: Marshall specimens
• Subject Areas: Design; Highways; Materials; Pavements; I22: Design of Pavements, Railways and Guideways; I23: Properties of Road Surfaces; I31: Bituminous Binders and Materials;

Filing Info

• Accession Number: 00616562
• Record Type: Publication
• Report/Paper Numbers: RES1(0099) P422
• Files: TRIS, STATEDOT
• Created Date: Nov 30 1991 12:00AM