动态剪切流变仪
沥青
时间-温度叠加
材料科学
相位角(天文学)
粘弹性
复合材料
流变仪
动态模量
车辙
剪切模量
模数
叠加原理
相(物质)
基础(拓扑)
动态力学分析
流变学
聚合物
光学
数学
化学
数学分析
物理
有机化学
出处
期刊:Advanced Materials Research
日期:2012-11-01
卷期号:598: 473-476
被引量:3
标识
DOI:10.4028/www.scientific.net/amr.598.473
摘要
Five SBS modified asphalts and one base asphalt were selected to carry out frequency sweeps over a wider frequency range using the dynamic shear rheometer (DSR). Six asphalt binders were subjected to sinusoidal loading at 30°C-90°C within the linear viscoelastic limits, and master curves of complex modulus (G*) and phase angle (δ) could be constructed by means of the time-temperature superposition principle (TTSP). The results show that the G* values of SBS modified asphalts are significantly greater than those of base asphalt at low frequencies, but are slightly smaller at high frequencies. Compared with the base asphalt, SBS modified asphalts have narrower master curves of complex modulus, and their phase angles are much smaller within the whole frequency range. This indicates that various properties of SBS modified asphalts, such as high-temperature property, low-temperature property, temperature susceptibility and elastic recoverability, are superior to those of the base asphalt. The G* values of the rolling thin-film oven (RTFO) aged asphalt are larger than those of the unaged asphalt in the whole range of frequencies, demonstrating that the anti-rutting performance of asphalt binder is improved after short-term aging.
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