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Various polymer modified bitumens (PmBs) were prepared and characterized using a dynamic shear rheometer and a bending beam rheometer. PmBs differ considerably in viscoelastic properties depending on base bitumen, and polymer type and content. The rheology of PmBs is strongly related to the morphology, and is also affected by sample preparation.
Bitumen is a semi-solid hydrocarbon material produced from certain crude oils. The majority of bitumen has been used as a binder in asphalt road pavements. During the time of service, and due to high traffic density and increases in axle loading and tyre pressure, plus insufficient maintenance, asphalt pavements can deteriorate and the distress signs often take the form of rutting, cracking and stone loss. In practice, the performance of an asphalt pavement is significantly affected by the rheological properties of the bitumen. To minimize the deterioration and thereby to increase the life-time of asphalt roads, polymer modified bitumens (or polymer modified binders, PmBs) may be used.
Xiaohu Lu, Hilde Soenen, Per Redelius
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