Influence of Coarse Aggregate Morphological Properties on the Performances of Warm-Mix Asphalt Containing Recycled Asphalt Pavement

被引：9
|
作者：
Guo, Peng [1 ]
Chen, Sixian [2 ]
Xie, Fengzhang [2 ]
Feng, Yunxia [2 ]
Cao, Zhiguo [2 ]
Chen, Chen [3 ]
Gong, Hongren [4 ,5 ]
Tang, Boming [1 ]
机构：
[1] Chongqing Jiaotong Univ, Dept Civil Engn, State Key Lab Cultivat Base Mt Bridge & Tunnel En, 66 Xuefu Ave, Chongqing 400074, Peoples R China
[2] Chongqing Jiaotong Univ, Dept Civil Engn, 66 Xuefu Ave, Chongqing 400074, Peoples R China
[3] Auburn Univ, Natl Ctr Asphalt Technol, 277 Technol Pkwy, Auburn, AL 36830 USA
[4] Tongji Univ, Key Lab Rd & Traff Engn, Minist Educ, Shanghai 201804, Peoples R China
[5] Univ Tennessee, Dept Civil & Environm Engn, 851 Neyland Dr, Knoxville, TN 37996 USA
来源：
JOURNAL OF MATERIALS IN CIVIL ENGINEERING | 2021年 / 33卷 / 05期
基金：
中国国家自然科学基金;
关键词：
HIGH PERCENTAGE; MIXTURES; RAP; CONCRETE; HOT; TEMPERATURE; TECHNOLOGY; BINDERS;
D O I：
10.1061/(ASCE)MT.1943-5533.0003681
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
The properties of asphalt and aggregate in the warm-mix asphalt (WMA) containing recycled asphalt pavement (RAP) are critical to the mixture performances. This study quantified the effects of the morphological properties of WMA-containing RAP through the gray correlation analysis. The properties of asphalt and aggregate involved in this study included RAP content, two-dimensional morphological properties of recycled coarse aggregate, three-dimensional angle of recycled coarse aggregate, and surface free energy of recycled asphalt. The high-temperature performance represented by dynamic stability, low-temperature indicated by maximum bending strain, and moisture susceptibility characterized by the tensile strength ratio were chosen as the criteria for evaluating the impacts of different factors. The results showed that the RAP content had the greatest influence on high-temperature performance, followed by recycled asphalt's surface free energy (SFE), and aggregate sphericity. The irregular shape factor of aggregate particles significantly influenced the mixture's low-temperature properties. The SFE of asphalt was pivotal to the moisture susceptibility, and samples with higher SFE of asphalt presented better moisture damage resistance. (c) 2021 American Society of Civil Engineers.
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页数：8
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