文献类型：期刊文献

英文题名：Surface Modification of Basalt Aggregate by Coupling Agent to Improve the Interfacial Adhesion with Asphalt Binder

作者：Chen, Xiao Jiang, Yu Xu, Tao Liu, Song Zhang, Wenli Gan, Xinli

第一作者：Chen, Xiao

通信作者：Xu, T[1]

机构：[1]Nanjing Forestry Univ, Coll Civil Engn, 159 Longpan Rd, Nanjing 210037, Jiangsu, Peoples R China;[2]Guizhou Inst Technol, Sch Transportat Engn, 1 Caiguan Rd, Guiyang 550003, Guizhou, Peoples R China

第一机构：Nanjing Forestry Univ, Coll Civil Engn, 159 Longpan Rd, Nanjing 210037, Jiangsu, Peoples R China

通信机构：corresponding author), Nanjing Forestry Univ, Coll Civil Engn, 159 Longpan Rd, Nanjing 210037, Jiangsu, Peoples R China.

年份：2023

卷号：35

期号：8

外文期刊名：JOURNAL OF MATERIALS IN CIVIL ENGINEERING

收录：;EI(收录号：20232314192268);Scopus(收录号：2-s2.0-85160938823);WOS:【SCI-EXPANDED(收录号:WOS:001011005600048)】；

基金：The authors would like to thank the financial support from the National Natural Science Foundation of China, China (No. 52278452), A Project Funded by the National First-class Disciplines (PNFD), and the Jiangsu Provincial Department of Education for the Qing Lan Project.

语种：英文

外文关键词：Surface modification; Surface free energy; Interfacial adhesion; Moisture damage resistance; Silane coupling agent (SCA); Adhesion work

摘要：The surface performance of basalt aggregate shows a great influence on the interfacial adhesion between basalt aggregate and asphalt binder and further affects the moisture stability of the asphalt mixture. To improve the interfacial adhesion between basalt aggregate and asphalt binder, as well as to increase the moisture stability of asphalt mixture in hot and humid environments, the basalt aggregate surface was hydrophobically modified by silane coupling agents (SCAs). Microscopically, the surface properties of basalt aggregate before and after surface modification by SCAs were characterized by environmental scanning electron microscope and Fourier transform infrared spectrometer, as well as the adhesion work between basalt aggregate and asphalt was calculated. Macroscopically, the moisture stability of the asphalt mixture was verified by boiling test and asphalt mixture tests. Test results indicate that the surface free energy values of basalt aggregates modified by SCAs and the stripping work values are decreased. Additionally, silanols, hydrogen bonds, and fibrous protrusions are introduced to the aggregate surface for improving the compactness of the asphalt-aggregate system. Finally, the loss rates of asphalt film and immersion scattering are decreased, as well as the freeze-thaw splitting tensile strength ratio is increased. The hydrophobic surface modification of basalt aggregate can enhance the moisture stability of the asphalt mixture.