Waste polymers as bitumen additive: characterization and properties

Experimental characterization of asphalt for an elasto-visco-plastic constitutive model.

This paper describes a range of uniaxial creep tests that have been undertaken for a proprietary polymer modified asphalt, the procedure used to determine the parameters required for an elasto-visco-plastic constitutive model. Uniaxial compressive creep testing and creep recovery testing have been undertaken over a range of temperatures and stress conditions. Procedures used to determine the model parameters from the test data are detailed and parametric equations are developed to describe the model parameters as functions of the test conditions. Particular attention is given to the determination of the parameters related to visco-plastic flow and damage accumulation at high strain levels. …

Laboratory investigation into the modification effect of paving bitumen with different plastomeric polymers

The use of polymer/bitumen modified blends in road paving applications has been increasingly advancing from the technological point of view. Plastomeric polymers are known to be amongst the most used in bitumen modification. Therefore, this paper presents the influence and degree of modification of several plastomeric modified bitumen in terms of rheological properties and morphology. Conventional tests such as penetration grade, Ring-and-Ball softening point and storage stability were performed. Rheological properties of the modified blends were characterized in terms of dynamic mechanical analysis via frequency sweep tests using the dynamic shear rheometer (DSR). The morphology of the sam…