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Enhancement of rheological and mechanical properties of bitumen using styrene acrylonitrile copolymer

机译：使用苯乙烯-丙烯腈共聚物增强沥青的流变和力学性能

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In this research, styrene acrylonitrile copolymer as a novel additive is used to modify rheological, mechanical and thermal properties of the base bitumen 70 penetration grade. Styrene acrylonitrile copolymer combines the rigidity of polystyrene with the hardness and thermal resistance of polyacrylonitrile to enhance viscoelastic property of the bitumen. To investigate the performance of the proposed mixture, shear complex module, phase angle, penetration, softening point, and reversibility of prepared samples are measured at different additive content and compared with the base bitumen. The results show that softening point of the base and modified samples are 49-86 degrees C, respectively. The rheological properties of the base bitumen and modified samples are measured by a dynamic shear rheometer (DSR). The phase angle as elasticity measure decreases from 55 degrees to 35 degrees in the modified bitumen compared to the base bitumen. Generally, the experimental results showed that styrene acrylonitrile copolymer makes bitumen to be more stable at high temperatures and more flexible at low temperatures. (c) 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015, 132, 41875.
机译：在这项研究中，苯乙烯-丙烯腈共聚物作为一种新型添加剂被用于改变基础沥青70渗透等级的流变，机械和热性能。苯乙烯-丙烯腈共聚物将聚苯乙烯的刚性与聚丙烯腈的硬度和耐热性结合在一起，以增强沥青的粘弹性。为了研究建议的混合物的性能，在不同的添加剂含量下测量了复合物的剪切模量，相角，渗透度，软化点和可逆性，并与基础沥青进行了比较。结果表明，基础样品和改性样品的软化点分别为49-86℃。基本沥青和改性样品的流变特性通过动态剪切流变仪（DSR）进行测量。与基础沥青相比，改性沥青中作为弹性度量的相角从55度减小到35度。通常，实验结果表明，苯乙烯-丙烯腈共聚物使沥青在高温下更稳定，在低温下更柔韧。 （c）2015 Wiley Periodicals，Inc. J. Appl。 Polym。科学2015，132，41875。

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