Effect of Poly Phosphoric Acid on Asphalt Binder Properties

The use of modified asphalt binders has grown tremendously in the United States. This is due primarily to the increased stress on the highways from higher traffic volumes and heavier loads. Many different modifiers have been used to improve the binder properties to better meet specifications. These modifiers include both organic and inorganic material such as Styrene Butadiene (SB), Styrene Butadiene Styrene (SBS), Ethylene Terpolymer and Polyphosphoric Acid (PPA). Concerns have been raised by several highway agencies about the actual performance characteristics of this last polymer PPA. These concerns include reversibility of the stiffening effect of PPA on asphalt binders and interactions with other additives such as hydrated lime in the mix. This paper will evaluate the effect of PPA on several different binders from different crude sources. The evaluations also include the use of PPA in combination with other modifiers such as SBS polymer and hydrated lime. Binder testing was done on the control neat binders and modified systems so that comparisons could be made between them.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/02702932
• Authors:
  • D’Angelo, John A
• Conference:
  • Asphalt Paving Technology 2010
  • Location: Sacramento CA, United States
  • Date: 2010-3-7 to 2010-3-10
• Publication Date: 2010

Language

• English

Media Info

• Media Type: Print
• Features: CD-ROM; Figures; References; Tables;
• Pagination: pp 679-694
• Serial:
  • Journal of the Association of Asphalt Paving Technologists
  • Volume: 79
  • Publisher: Association of Asphalt Paving Technologists (AAPT)
  • ISSN: 0270-2932
  • Serial URL: https://www.asphalttechnology.org/site_page.cfm?pk_association_webpage_menu=9169&pk_association_webpage=19109

Subject/Index Terms

• TRT Terms: Binders; Calcium hydroxide; High volume roads; Pavement performance; Polymer asphalt; Styrene butadiene styrene; Traffic loads
• Uncontrolled Terms: Polyphosphoric acid
• Subject Areas: Highways; Materials; Pavements; I33: Other Materials used in Pavement Layers;

Filing Info

• Accession Number: 01328013
• Record Type: Publication
• Files: TRIS
• Created Date: Jan 20 2011 11:22AM