Analysis of Rheological Properties and Micromechanism of Foamed Warm Mix Asphalt Mastic

被引：0
|
作者：
Wen Y. [1 ]
Guo N. [1 ]
Wang L. [1 ]
Gu W. [2 ]
You Z. [3 ]
机构：
[1] Transportation Engineering College, Dalian Maritime University, Dalian
[2] Department of Road and Bridge Engineering, Liaoning Provincial College of Communications, Shenyang
[3] Department of Civil and Environmental Engineering, Michigan Technological University, Houghton
来源：
Cailiao Daobao/Materials Reports | 2020年 / 34卷 / 05期
基金：
中国国家自然科学基金;
关键词：
DSC test; Foamed warm mix asphalt mastic; Glass transition temperature; Master curve; Micromechanism; Rheological property;
D O I：
10.11896/cldb.19050044
中图分类号：
学科分类号：
摘要：
The objective of this study is to explore the rheological properties of foamed warm mix asphalt (foamed asphalt) mastic with different filler-binder ratios completely, by using the dynamic shear rheometer (DSR) with temperature and frequency sweep, and bending beam rheometer (BBR) tests, respectively. Also, the influence of filler-asphalt ratio on the high and low temperature performance of the foamed asphalt mastic was analyzed, and the effectiveness of time-temperature superposition principle was discussed for the foamed asphalt mastic by the vGP graph. The master curve of foamed asphalt mastic was established, and then the master curve was used to perform a rheological analysis in a wide temperature and frequency domain. In addition, this study investigated the micromechanism of the foamed asphalt mastic by using direct microstructure observations and thermal property testing, including scanning electron microscope (SEM) and differential scanning calorimeter (DSC). The results show that the addition of mineral filler exhibits a significant influence on the high and low temperature performance of the foamed asphalt. Then, with the increase of filler-binder ratio, the high temperature performance of the foamed asphalt mastic increases, and the low temperature performance decreases. The time-temperature superposition principle can be employed in the foamed asphalt mastic investigated. The foamed asphalt mastic shows high temperature performance better than the base asphalt mastic in a wide temperature and frequency domain. The low temperature grading temperature of the foamed asphalt mastic exhibits a favorable consistency with that of the base asphalt mastic in this study. The distribution of filler in the base asphalt mastic is inferior to that in the foamed asphalt mastic. The base asphalt mastic with larger amount of micro-hole is found compared with foamed asphalt mastic. The foamed asphalt indicates a thermal stability lower than base asphalt, however, the thermal stability of foamed asphalt mastic displays an obvious increase as compare to that of base asphalt mastic. The foamed asphalt mastic performs glass transition temperature higher than the base asphalt mastic when the filler-binder ratio is less than 1. 0. The filler-binder ratio in the foamed asphalt mastic is proposed to be less than 1.0 through the rheological properties and micromechanism investigation. © 2020, Materials Review Magazine. All right reserved.
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页码：10052 / 10060
页数：8
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