Evaluation of rheological master curves of asphalt mastics and asphalt-filler interaction indices
Evaluation of rheological master curves of asphalt mastics and asphalt-filler interaction indices
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DOI：
10.1016/j.conbuildmat.2020.120046
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发表时间：
2020-12
影响因子：
7.4
通讯作者：
Y. Bi;Ruyi Wei;Rui Li;Jiu-peng Zhang;J. Pei
中科院分区：
文献类型：
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作者：
Y. Bi;Ruyi Wei;Rui Li;Jiu-peng Zhang;J. Pei
了解沥青胶浆的流变行为是改善混合料剪切应力响应的重要一步。本研究的目的是观察流变主曲线和沥青-填料的相互作用的沥青胶浆在线性粘弹性（LVE）范围内，通过使用各种流变指标。采用频率扫描试验研究了流变指标的影响因素及沥青-填料相互作用指标的适用性。同时，建立了各种沥青-填料相互作用指数的关联式。结果表明，填料体积分数和老化效应对流变性能的影响显著大于粘结剂类型和填料类型。老化作用可以减小不同胶粘剂之间流变学指标的差异。沥青-填料相互作用指数分析表明，改性剂的加入对砂胶的临界填料体积分数（Φm）有明显的影响。此外，复模量系数（△G*）、K-B-G*（K-B-G*）和复粘度系数（△η*）指标在评价沥青-填料相互作用能力方面具有一致性。K-B-G* 值随老化程度的增加而增大，即填料-沥青相互作用随老化程度的增加而增强
Understanding the rheological behavior of the asphalt mastic is an important step towards improving the shear-stress response of the mixture. The objective of this study is to observe the rheological master curves and the asphalt-filler interaction of the asphalt mastics in the linear viscoelastic (LVE) range by using various rheological indices. The frequency sweep (FS) test was utilized to investigate the influence factors of the rheological indexes and the applicability of the asphalt-filler interaction indexes. Simultaneously, the correlation of various asphalt-filler interaction indices was established. The results showed that the influence of filler volume fraction and the aging effect exhibited a stonger significant effect on the rheological indices were significantly stronger than that of the binder type and filler type. The aging effect could reduce the difference in the rheological indices between various mastics. The analysis of the asphalt-filler interaction indices showed that the addition of the modifier had a negtive effect on the critical filler volume fraction (Φm) of the mastic. Moreover, the indices of the complex modulus coefficient (△G*),K.D.Ziegel-B-G* (K-B-G*)and complex viscosity coefficient(△η*)presented the consistency in evaluating the asphalt-filler interaction ability. The value ofK-B-G*increased with the aging degree, that is, the filler-asphalt interaction increased with aging degree