Department of Transportation Perspective: A Survey on Polyphosphoric Acid Use and Issues

To establish a reference point in time, Dean Maurer of the Pennsylvania Department of Transportation (DOT) conducted a survey of the state DOTs to determine their current specification requirements with respect to the use of polyphosphoric acid (PPA). This survey was conducted in the winter of 2008–2009. The survey had 37 responses from the state DOTs. The Ontario Ministry of Transport (MTO) had also conducted a survey in 2007 on the use of PPA to modify asphalt binder. Pennsylvania combined the data from the two surveys to achieve a combination of 48 responses. The survey overall provided a snapshot in time on the use of PPA and the general policies of the highway agencies on its use. The general conclusions from the survey were the following: There is a wide spectrum in the use of PPA from outright bans to unrestricted use; No specific documentation of poor performance was brought forward; A potential exists to significantly expand the currently limited performance database and available documentation on PPA as a binder modifier; Due to fluctuating binder–modifier supply, agencies will need to be more flexible and knowledgeable concerning modifiers; and The workshop agenda should go a long way toward filling critical gaps in knowledge on PPA modification.

• Record URL:
  • https://nap.nationalacademies.org/catalog/22828
• 
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/00978515
• Authors:
  • Maurer, Dean
  • D'Angelo, John A
• Conference:
  • Workshop on Polyphosphoric Acid Modification of Asphalt Binders
  • Location: Minneapolis Minnesota, United States
  • Date: 2009-4-7 to 2009-4-8
• Publication Date: 2012-1

Language

• English

Media Info

• Media Type: Digital/other
• Features: Figures; Tables;
• Pagination: pp 8-11
• Monograph Title: Polyphosphoric Acid Modification of Asphalt Binders: A Workshop, April 7-8, 2009, Minneapolis, Minnesota
• Serial:
  • Transportation Research Circular
  • Issue Number: E-C160
  • Publisher: Transportation Research Board
  • ISSN: 0097-8515

Subject/Index Terms

• TRT Terms: Bituminous binders; Pavement performance; Phosphoric acid; State departments of transportation; Surveys
• Uncontrolled Terms: Polyphosphoric acid
• Subject Areas: Highways; Materials; Pavements; I23: Properties of Road Surfaces; I31: Bituminous Binders and Materials;

Filing Info

• Accession Number: 01363330
• Record Type: Publication
• Files: TRIS, TRB
• Created Date: Feb 23 2012 2:21PM