Impact of Mix Design on Asphalt Pavement Durability

Asphalt mixture durability is defined as the ability of compacted asphalt concrete to maintain its structural integrity throughout its expected service life when exposed to the damaging effects of the environment and traffic loading. This paper discusses the impact of mix design on the durability of asphalt pavements. Environment, drainage, construction and mixture composition are described as the major factors affecting asphalt mixture durability. The durability of asphalt concrete mixtures is affected by the properties of the aggregates and binder used in the mixture as well as the gradation and volumetric properties of the mixture; all of which are addressed during mixture design. A number of changes to mixture design have been recommended in an effort to improve asphalt mixture durability. The most common include: 1) increase the effective binder content; 2) use a smaller nominal maximum size mixture or fine gradation mixture; 3) use polymer-modified binders; and 4) use a softer grade of binder or warm mix for mixtures with recycled binders. In addition to the approaches listed above, there is growing interest in the concept of balanced mixture design. Balanced mixture design uses performance tests for rutting resistance and load associated cracking resistance to select volumetric and binder properties that will provide adequate resistance to both rutting and load-associated cracking.

• Record URL:
  http://www.trb.org/Publications/Blurbs/171408.aspx
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/00978515
• Authors:
  • Bonaquist, Ramon
• Conference:
  • Enhancing the Durability of Asphalt Pavements Workshop
  • Location: Washington DC, United States
  • Date: 2013-1-13 to 2013-1-13
• Publication Date: 2014-9

Language

• English

Media Info

• Media Type: Digital/other
• Features: References; Tables;
• Pagination: pp 1-17
• Monograph Title: Enhancing the Durability of Asphalt Pavements: Papers from a Workshop
• Serial:
  • Transportation Research Circular
  • Issue Number: E-C186
  • Publisher: Transportation Research Board
  • ISSN: 0097-8515

Subject/Index Terms

• TRT Terms: Asphalt mixtures; Asphalt pavements; Durability; Mix design; Pavement performance; Performance tests; Properties of materials
• Subject Areas: Highways; Materials; Pavements; I31: Bituminous Binders and Materials; I52: Construction of Pavements and Surfacings;

Filing Info

• Accession Number: 01539922
• Record Type: Publication
• Files: TRIS, TRB, ATRI
• Created Date: Oct 7 2014 9:53AM