01363316

Component

http://www.trb.org/Publications/Blurbs/166590.aspx

Different techniques have been developed for modifying asphalt cement (AC) to improve its high-temperature characteristics. Among these methods, chemical modification using polyphosphoric acid (PPA) has gained popularity in recent years, partly because it is an economical way of modifying AC. The potential problems associated with the use of such a method, however, may offset the benefits it offers. The Ontario Ministry of Transport (MTO) has developed a six-step plan to help the ministry address these concerns with the goal of balancing the benefits with the risks. The plan, which is discussed in this paper, consists of the following six steps: (1) conduct environmental scan; (2) identify issues, concerns, and benefits; (3) consult with industry; (4) develop a risk management plan; (5) specify revision and implementation; and (6) monitor and review options.

01363314

English

pp 109-114

2012-1

Transportation Research Circular

Workshop on Polyphosphoric Acid Modification of Asphalt Binders

Digital/other

References

Asphalt cement; Economic benefits; High temperature; Phosphoric acid; Properties of materials; Risk management

Ontario Ministry of Transportation

Polyphosphoric acid

Highways; Materials; Pavements; I23: Properties of Road Surfaces; I31: Bituminous Binders and Materials

TRIS, TRB

Feb 23 2012 12:42PM

• Analytical Procedures for Determining Phosphorus Content in Asphalt Binders and Impact of Aggregate on Quantitative Recovery of Phosphorus from Asphalt Binders
• Best Practices for Polyphosphoric Acid Modification of Asphalt: Phosphate Forum of the Americas
• Binder Modification with Combination of Polyphosphoric Acid and Styrene-Butadiene-Styrene: National Center for Asphalt Technology Test Track Experience
• Department of Transportation Perspective: A Survey on Polyphosphoric Acid Use and Issues
• Effect of Polyphosphoric Acid on Asphalt Binder Properties
• Establishing a Baseline of Knowledge Through 2005 by Reviewing AI IS-220: Polyphosphoric Acid Modification of Asphalt
• Field Investigation of Polyphosphoric Acid–Modified Binders at MnROAD
• Implementation of Polyphosphoric Acid Modification of Asphalt Binders and Related Experience: Case Study
• Louisiana Approach to Binder Modification
• Modified Asphalt Cement Use in Arkansas
• Polyphosphoric Acid in Combination with Styrene-Butadiene-Styrene Block Copolymer: Laboratory Mixture Evaluation
• Polyphosphoric Acid Modification of Asphalt Binders: A Workshop. Workshop Summary
• Polyphosphoric Acid–Modified Binders and Mixtures: Aggregate and Binder Interactions, Rutting, and Moisture Sensitivity of Mixtures
• Use of Phosphoric Acid as Modifier for Hot-Mix Asphalt
• Why and How of Polyphosphoric Acid Modification: An Industry Perspective
• Wisconsin Approach to Binder Modification