Pavement distress occurs through a variety of mechanisms, but it is always controlled by the adhesive and cohesive performance of the asphalt binder. Although the causes of pavement failures are known, the precise mechanisms by which they occur remain to be understood. Observation of the fracture morphology of asphalt concrete can provide some information in this respect. The fracture morphology of asphalt concrete is dependent on the morphology of the binder. A network structure was observed in thin asphalt binder films and the fracture morphology and engineering properties of asphalt concrete were found to be dependent on the network morphology of the asphalt binder. Addition of polymers to asphalt binders causes changes in the nature of the network structure, and its effect can be qualitatively determined by characterizing the fracture morphology. Styrene butadiene styrene (SBS), styrene ethylene butylene styrene (SEBS), styrene butadiene rubber (SBR) latex and an epoxy-terminated reacting polyolefin (Elvaloy AM) were used in this study. A quantitative method to determine the effect of polymer modification on the fracture properties of asphalt concrete is the J-contour integral fracture toughness measurement. An experimental protocol to measure the critical J-integral fracture toughness ( J1 c) was developed and the low temperature (-10°C) J1 c values were determined for SEBS and Elvaloy AM-modified asphalt concrete at three different concentrations.


    Access

    Download

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Fracture Morphology and Fracture Toughness Measurement of Polymer-Modified Asphalt Concrete


    Additional title:

    Transportation Research Record: Journal of the Transportation Research Board


    Contributors:


    Publication date :

    1997-01-01




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English



    Fracture Morphology and Fracture Toughness Measurement of Polymer-Modified Asphalt Concrete

    Bhurke, A. S. / Shin, E. E. / Drzal, L. T. et al. | British Library Conference Proceedings | 1997




    Low Temperature Fracture of Polyethylene-Modified Asphalt Binders and Asphalt Concrete Mixes

    Lee, N. K. / Morrison, G. R. / Hesp, S. A. M. | British Library Online Contents | 1995