In this paper, in order to investigate the viscoelasticity of asphalt binder at the softening point temperature, more than 30 different asphalt binders were selected and tested by dynamic rheological scan method using a dynamic shear rheometer(DSR). The softening points and the rheological parameters of the asphalt samples were measured and analyzed. The results indicated that at the softening point temperature the neat asphalt and the SBS modified asphalt showed two different rheological states. The neat asphalt binders had a majority of viscous components in viscoelastic composition, with the phase angles being mostly higher than 80 o. The SBS modified binders had lower phase angles, with their elasticity still retained. Meanwhile, the Shapiro-Wilk normality test showed that at a confidence level of 0.05, at whatever aging state, the neat asphalt had a stable complex modulus corresponding to the softening point, which was 13.034 kPa at a standard deviation of 2.105 kPa under the same test condition. The softening point of neat asphalt binder can be calculated via the equivalent modulus rule. It is found out that there is a good relationship between the calculated and the measured softening points. And it is suggested that more data are needed to validate this finding.
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机译:Thermistricant, elected and avoidable temperatures of Cyclops Strenuus Fischer, 1851 and their connection with optimal, pessimal and tolerant temperatures
机译:Erratum for “Preparation of Low-Temperature Phase Change Materials Microcapsules and Its Application to Asphalt Pavement” by Feng Li, Siqi Zhou, Sai Chen, Zhenglong Yang, Jian Yang, Xingyi Zhu, Yuchuan Du, Peiting Zhou, and Zhihao Cheng