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Investigation on performance of polyphosphoric acid (PPA)/SBR compound-modified asphalt mixture at high and low temperatures

机译：多磷酸（SPP）/ SBR复合改性沥青混合料在高温和低温下的性能研究

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摘要

With the aim of improving the asphalt and asphalt mixture performance at high and low temperatures, polyphosphoric acid (PPA) and styrene butadiene rubber (SBR) were added to achieve a modification in this study. The effects of PPA and SBR compound modifiers on the rheological and mechanical properties of asphalt and asphalt mixture were characterised by conventional and novelty tests. It was demonstrated that PPA can dramatically improve the anti-rutting performance of base and SBR-modified asphalt and mixture. In addition, resistance against low-temperature cracking of PPA/SBR compound-modified asphalt and mixture was also desirable. Furthermore, the performance indicators were ranked and analysed. As a consequence, 0.75%PPA/2.5%SBR is beneficial to achieve the desired properties comprehensively. The novel tests mentioned in the paper are proper and recommended. Effective indicators have been proposed for their potential to characterise the performance of asphalt and mixture.
机译：为了改善沥青和沥青混合料在高温和低温下的性能，本研究中添加了聚磷酸（PPA）和丁苯橡胶（SBR）。通过常规和新颖性试验表征了PPA和SBR复合改性剂对沥青和沥青混合料的流变和力学性能的影响。结果表明，PPA可以显着提高基础和SBR改性沥青及混合物的抗车辙性能。另外，还需要耐PPA / SBR化合物改性的沥青和混合物的低温开裂性。此外，对绩效指标进行了排名和分析。结果，0.75％PPA / 2.5％SBR有利于全面实现期望的性能。本文中提到的新颖测试是正确的并且值得推荐。已经提出了有效的指标，因为它们具有表征沥青和混合料性能的潜力。

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