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Effect of waste polymer addition on the rheology of modified bitumen

机译：废聚合物的添加对改性沥青流变学的影响

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This paper deals with the modification of petroleum bitumen with four different types of waste polymers. EVA, EVA/LDPE blend, crumb tire rubber and ABS, ail of them coming from recycling plants of waste plastic materials, were used as modifying agents of the bitumen employed in the pavement building. Optical microscopy, modulated calorimetry and a set of different rheological tests were developed in order to characterise the modified bitumens. The results obtained reveal that tire rubber as well as its blends with other polymers can be considered as an interesting modifier of the bitumen in a wide range of temperatures. As an elastomer, it endows the pavement a higher flexibility, which makes it more resistant to the traffic loading. The blend composed of EVA and LDPE displays quite promising results at high in-service temperatures, due to the development of a polymer network throughout the modified bitumen. Furthermore, the calorimetry tests carried out demonstrate different degrees of compatibility between the bitumen and the polymers used.
机译：本文涉及用四种不同类型的废聚合物改性石油沥青。 EVA，EVA / LDPE共混物，碎屑轮胎橡胶和ABS（它们全部来自废旧塑料回收工厂）被用作路面建筑中使用的沥青的改性剂。为了表征改性沥青，开发了光学显微镜，调制量热法和一组不同的流变学测试。所获得的结果表明，轮胎橡胶及其与其他聚合物的共混物可在广泛的温度范围内被视为沥青的有趣改性剂。作为弹性体，它使路面具有更高的柔韧性，使其更能抵抗交通负荷。由于在整个改性沥青中均形成了聚合物网络，因此由EVA和LDPE组成的共混物在高使用温度下显示出非常可观的结果。此外，进行的量热测试表明沥青和所用聚合物之间的相容性程度不同。

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