AN EVALUATION OF DENSE GRADED ASPHALT-RUBBER CONCRETE IN MINNESOTA. FINAL REPORT

The Minnesota Department of Transportation is continually investigating ways to improve the cold temperature performance of its asphalt concrete pavements. One reported method is to modify the asphalt binder with ground reclaimed automobile and truck tire rubber. In 1984, a project on TH 7 (State Project 4703-17) was selected for the field trial of an asphalt-rubber cement dense graded concrete utilizing a product produced by Arizona Refining of Phoenix, Arizona. Construction of the asphalt-rubber cement dense graded asphalt concrete required some special effort and specialized equipment to maintain adequate mixing and placing temperatures. Evaluations included crack counting, resilient modulus, in place air voids, rutting, roughness, recovered penetration and cost considerations. Interesting results regarding the resilient modulus of the asphalt rubber samples were found. However, the formulation used provided little or no perceived benefits to the roadway at much higher costs. The high costs were due in part to the nature of the project. However, this appears to be a cumbersome and expensive procedure with the primary benefit being waste tire utilization.

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• Record URL:
  https://rosap.ntl.bts.gov/view/dot/14725
• Corporate Authors:

  Minnesota Department of Transportation

  Materials and Research Laboratory, 1400 Gervais Avenue
  Mapplewood, MN  United States  55109
• Authors:
  • Turgeon, C M
• Publication Date: 1991-11

Media Info

• Features: Appendices; Figures; Tables;
• Pagination: 23 p.

Subject/Index Terms

• TRT Terms: Air voids; Asphalt concrete; Asphalt rubber; Benefits; Construction equipment; Costs; Crumb rubber; Dense graded aggregates; Mixtures; Modulus of resilience; Pavement cracking; Roughness; Ruts (Pavements)
• Uncontrolled Terms: Dense graded mixes; Rut
• Old TRIS Terms: Air voids content
• Subject Areas: Design; Finance; Highways; Materials; Pavements; I22: Design of Pavements, Railways and Guideways; I23: Properties of Road Surfaces; I31: Bituminous Binders and Materials;

Filing Info

• Accession Number: 00622314
• Record Type: Publication
• Report/Paper Numbers: MN/RD-92/01, 9PR6002
• Files: NTL, TRIS, STATEDOT
• Created Date: May 31 1992 12:00AM