Laboratory Investigation of Warm Asphalt Binder Properties - A Preliminary Analysis

With increasing concerns of global warming and increasing emissions, the asphalt industry is making a constant effort to lowering its emissions by reducing the mixing and compaction temperatures of the asphalt mixture without affecting the properties of the mix. Several proprietary chemicals are available in the industry that can help reduce the mixing and compaction temperatures. These chemicals work in different ways to either reduce the viscosity of the binder or to allow better workability of the mix at lower temperatures due to some modifications in the binder. A significant reduction of required heat can be achieved in most cases. Several studies have been conducted evaluating the properties of the warm mix asphalt; however, properties of the binders containing these chemicals have not been studied in great detail. This paper presents the tests conducted on 3 different binders from different sources and performance grades. Warm asphalt binder was produced using two of the available processes, and tests were conducted on the binders using the viscometer and the Dynamic Shear Rheometer. The binders were then stored at 120 oC for 3 days to simulate plant shutdowns, and the tests were repeated. It was observed that one of the processes significantly increases the viscosity, whereas another significantly lowers the viscosity of the binder.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/9780874141597
• Corporate Authors:

  University of Iowa, Iowa City

  Department of Civil and Environmental Engineering
  Iowa City, IA  United States  52242
• Authors:
  • Gandhi, Tejash S
  • Amirkhanian, Serji N
• Conference:
  • Fifth International Conference on Maintenance and Rehabilitation of Pavements and Technological Control (MAIREPAV5)
  • Location: Park City UT
  • Date: 2007-8-8 to 2007-8-10
• Publication Date: 2007

Language

• English

Media Info

• Media Type: Print
• Features: Figures; References;
• Pagination: pp 475-480
• Monograph Title: International Conference on Maintenance and Rehabilitation of Pavements and Technological Control (MAIREPAV5), Fifth Proceedings

Subject/Index Terms

• TRT Terms: Asphalt mixtures; Bituminous binders; Laboratory studies; Properties of materials; Viscosity; Warm mix paving mixtures; Workability
• Subject Areas: Highways; Materials; I31: Bituminous Binders and Materials;

Filing Info

• Accession Number: 01130072
• Record Type: Publication
• ISBN: 9780874141597
• Files: TRIS
• Created Date: Jun 17 2009 12:07PM