Use of Polyphosphoric Acid in Asphalt Binders, Applications for Asphalt Paving -- Table Of Contents

Executive Summary

1.0 Introduction

2.0 The Effect of PPA in Asphalt

3.0 Performance History

3.1 PPA Catalytic Asphalt Binding

3.2 PPA Asphalt Modification

3.3 PPA/Polymer Modification

3.4 PPA Crumb Rubber Modification

4.0 PPA Modified Binder Improvement and Mixture Performance

4.1 Moisture Resistance

4.1.1 Texas Boil Test

4.1.2 Lottman Test

4.1.3 Hamburg Loaded Wheel Test

4.2 Aging of PPA Modified Asphalt Cement

5.0 Chemistry

6.0 Storage and Handling

References

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This paper was prepared by the Purified Polyphosphoric Acid (PPPA) Subcommittee, a subcommittee of the Phosphate Forum of the Americas (PFA). PFA provides a forum for information exchange on scientific and technical matters relating to inorganic phosphate products. Members of the PPPA Subcommittee are ICL Performance Products, LP and Innophos, Inc., companies that make purified polyphosphoric acid, which is used as an asphalt binder modifier for asphalt roads.