Chemical, thermal and rheological characteristics of composite polymerized asphalts
Chemical, thermal and rheological characteristics of composite polymerized asphalts
复制标题
复合聚合沥青的化学、热学和流变特性
DOI：
10.1016/j.fuel.2018.04.100
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发表时间：
2018-09
期刊：
影响因子：
7.4
通讯作者：
Xiao Feipeng
中科院分区：
文献类型：
--
作者：
Wang Jiayu;Yuan Jie;Kim Kwang W.;Xiao Feipeng
热氧化对复合聚合沥青的流变性能和化学性能有显著影响。将聚乙烯（PE）和一种多元聚合物（抗车辙剂）以4种含量掺入到沥青结合料中，从化学官能团、分子尺寸、热行为和流变特性等方面研究了聚合物-沥青复合体系的性能。由于热氧化形成大的共轭结构，在长期老化过程后羰基峰向较低的波数移动，并且老化过程增加了大分子尺寸的值。然而，在氧化过程中，PE的降解起主导作用，这显着降低复合粘结剂的LMS值。因此，老化过程改变了粘结剂的化学组成和元素组成分布，这些变化受粘结剂来源和聚合物含量的影响。此外，随着聚合物改性程度的增加，低频下的针入度值和相角值减小，低频下的吸热峰面积、软化点以及复数剪切模量增大。因此，老化过程中应考虑聚合物降解和多环芳烃的形成，它们共同影响复合聚合沥青的流变性能。相关性分析表明，羰基结构指数ICdbndO与玻璃态模量与平衡态模量之差、相角主曲线平台δ P显著相关，LMS值与相角主曲线因子δ L和δ P + δ L在低频下显著相关。
Thermal oxidation has a significant effect on rheological and chemical properties of composite polymerized asphalt. In this study, polyethylenes (PE) and a multi-polymer (a type of anti-rutting agent) were incorporated into asphalt binders at four contents and the properties of polymer-asphalt composite systems were investigated through chemical functional group, molecular size, thermal behavior and rheological characteristics. Due to the formation of large conjugate structure by thermal oxidation, the carbonyl peak shifted to a lower wavenumber after a long-term aging procedure and the aging procedure increased the values of large molecular sizes. However, the degradation of PE played a dominant role during oxidation progress, which significantly decreased the LMS value of composite binders. Therefore the aging process changed the chemical compositions and element component distribution of binders and these changes were influenced by both binder source and polymer contents. In addition, with the increase of polymer modification, the penetration value and phase angle value at low frequency decreased; the endothermic peak area, softening point as well as complex shear modulus at low frequency increased. Therefore, the polymer degradation and polycyclic aromatic hydrocarbon formation should be considered during the aging process, which influenced the rheological performance of composite polymerized asphalts together. Furthermore, the correlation analysis showed that the carbonyl structure index ICdbndOhas significant correlations with the difference between glassy modulus and equilibrium modulus, and phase angle master curve plateau δP, the LMS value has significant relationships with phase angle master curve factors δL and δP + δL at a low frequency.
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DOI：
10.1061/(asce)0899-1561(1993)5:1(41
发表时间：
1993-02
影响因子：
3.2
作者：
Kwang W. Kim;J. Burati
通讯作者：
Kwang W. Kim;J. Burati
影响因子：
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影响因子：
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作者：
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DOI：
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发表时间：
2006-08
影响因子：
3.2
作者：
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通讯作者：
Kwang W. Kim;Kyong-Jin Kim;Y. Doh;S. Amirkhanian
DOI：
10.1061/(asce)mt.1943-5533.0000235
发表时间：
2011-06-01
影响因子：
3.2
作者：
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通讯作者：
Veeraragavan, A.