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Investigation of road performances of reaction-rejuvenated SBS modified bitumen mixture

机译：再生SBS改性沥青混合料路用性能研究。

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As time goes on, more and more waste SBS modified bitumen mixture (SMBM) located at the top-layer of high-grade roadway requires to be recycled for repaving with high-quality performance. To solve the problem, the reactive rejuvenating systems (BUDGEs and BUDGE-MDIs) containing 1,4-butanediol diglycidyl ether (BUDGE) and/or diphenyl methane diisocyanate (MDI) and fluid catalytic cracking slurry (FCC slurry) are applied to the rejuvenation of aged SMBM. In this paper, the effects of BUDGEs and BUDGE-MDIs on the moisture damage, rutting performance, low-temperature flexural characteritics and the macroscopic fracture morphology of aged SMBM are systematically investigated. The results of the moisture damage suggest that the reactive rejuvenating systems, particularly BUDGE-MDIs, can obviously contribute for improving the water stability approaching to the level of the fresh SMBM and effectively retain the higher water resistance after secondary immersion. The results of the rutting performance demonstrate that BUDGE-MDIs can inhibit the significant reduction of the elastic components of the aged binder and preferably remains the dynamical stability at high temperature when compared with BUDGEs. The low-temperature performance indicates that BUDGE-MDIs has remaining positive effects on the low-temperature crack behavior depression of aged SMBM in comparison with BUDGEs, and the anti-crack ability somewhat deteriorates after long-term loads, while from the fracture morphology, it finds the reactive rejuvenating systems can recover the combining force of aged binder to some extent for the marked reduction in the brittle fracture of aged SMBM at low temperature. (C) 2018 Elsevier Ltd. All rights reserved.
机译：随着时间的流逝，位于高等级巷道顶层的越来越多的废SBS改性沥青混合料（SMBM）需要进行回收，以实现高质量的修补。为了解决该问题，将包含1，4-丁二醇二缩水甘油醚（BUDGE）和/或二苯基甲烷二异氰酸酯（MDI）和流化催化裂化浆料（FCC浆料）的反应性复兴体系（BUDGE和BUDGE-MDI）应用于该复兴。 SMBM的年龄。本文系统地研究了BUDGE和BUDGE-MDI对老化SMBM的水分破坏，车辙性能，低温挠曲特性和宏观断裂形态的影响。水分破坏的结果表明，活性再生系统，特别是BUDGE-MDI，可以明显改善水稳定性，达到新鲜SMBM的水平，并在二次浸泡后有效保持较高的耐水性。车辙性能的结果表明，与BUDGE相比，BUDGE-MDI可以抑制老化粘合剂的弹性组分的显着降低，并且优选在高温下保持动态稳定性。低温性能表明，与BUDGE相比，BUDGE-MDI对老化的SMBM的低温裂纹行为抑制仍具有积极作用，并且在长期载荷后抗裂性能有所降低，而从断裂形态来看，研究发现，在低温下，活性再生系统可以在一定程度上恢复老化粘结剂的结合力，从而显着降低老化SMBM的脆性断裂。 （C）2018 Elsevier Ltd.保留所有权利。

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