Experimental Research on Crumb Rubber and Polyphosphoric Acid Composite Modified Asphalt Binders

Wei Dong Cao

doi:10.4028/www.scientific.net/AMM.174-177.1579

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 174-177Experimental Research on Crumb Rubber and...

Experimental Research on Crumb Rubber and Polyphosphoric Acid Composite Modified Asphalt Binders

Abstract:

In order to research the properties of crumb rubber (CR) and polyphosphoric acid (PPA) composite modified asphalt binders, an orthogonal test design is employed to arrange the experimental program. Three particle sizes of CR, three contents of CR and PPA were representatively selected as three influencing factors and levels. A total of nine composite modified asphalt binders were produced in laboratory and the conventional penetration grading indexes including penetration, softening point and ductility were conduced. The results indicate that the properties of composite modified asphalt binders are improved not only at high temperatures but also at low temperatures compared to the base asphalt binder. Based on variance analysis, the optimal proportion of CR and PPA composite modified asphalt is recommended.

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Periodical:

Applied Mechanics and Materials (Volumes 174-177)

Pages:

1579-1583

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.174-177.1579

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Online since:

May 2012

Authors:

Wei Dong Cao

Keywords:

Composite Modified Asphalt, Crumb Rubber (CR), Orthogonal Test, Polyphosphoric Acid (PPA), Variance Analysis (ANOVA)

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