Construction of Asphalt Mixtures with Modified Binders: A Laboratory Study

This study evaluates the influence of binder viscosity, compaction temperature, and compaction pressure upon the densification of test mixtures produced using Process Modified Asphalt (PrMA) and Polymer Modified Asphalt (PMA). The effect upon densification is evaluated by comparing the effort needed to compact each mix using two compaction levels and three compaction temperatures. One type of aggregate and one type of mix gradation are used in this evaluation. The results showed that mixes vary in their sensitivity to the compaction level and the compaction temperature. It is observed that there is a high level of interaction between compaction pressure and temperature. Surprisingly, the conventional thinking of "density always increases with temperature" does not apply for all mixtures. There are clearly optimum temperature and pressure ranges within which densification can be achieved more efficiently. While some studies have reported on what are known as "Tender Zones," very few could quantify this in the laboratory and report on what makes a mixture tender and how to give guidelines to contractors to avoid tender zones. The authors suggest that these zones could be asphalt binder specific and should be defined in a 2-domain chart showing pressure and temperature sensitivity. For the covering abstract of this conference, see ITRD number E215112. (A)

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/0921317654
• Authors:
  • FAHEEM, A
  • Kamel, N
  • SZABO, V
  • BAHAI, H
• Publication Date: 2006-11

Language

• English

Media Info

• Pagination: 123-142
• Serial:
  • PROCEEDINGS OF THE FIFTY-FIRST ANNUAL CONFERENCE OF THE CANADIAN TECHNICAL ASPHALT ASSOCIATION (CTAA): CHARLOTTETOWN, PRINCE EDWARD ISLAND, NOVEMBER 2006
  • Publisher: Polyscience Publications

Subject/Index Terms

• TRT Terms: Binder content; Bitumen; Compaction; Conferences; Hot coated materials; Laboratories; Mix design; Temperature; Test procedures; Viscosity
• Geographic Terms: Canada
• ITRD Terms: 4929: Binder content; 4963: Bitumen; 8018: Canada; 3686: Compaction; 8525: Conference; 4997: Hot coated material; 6237: Laboratory (not an organization); 4714: Mix design; 6722: Temperature; 6288: Test method; 5936: Viscosity
• Subject Areas: Design; Materials; Pavements; I22: Design of Pavements, Railways and Guideways; I31: Bituminous Binders and Materials; I33: Other Materials used in Pavement Layers;

Filing Info

• Accession Number: 01079089
• Record Type: Publication
• Source Agency: Transportation Association of Canada (TAC)
• ISBN: 0-921317-65-4
• Files: ITRD
• Created Date: Oct 22 2007 9:57AM