Effect of different fibers on the properties of asphalt mastics. (30th November 2020)

• Record Type: Journal Article
• Authors: Xing, Xiangyang; Chen, Shihui; Li, Yang; Pei, Jianzhong; Zhang, Jiupeng; Wen, Yong; Li, Rui; Cui, Shengchao
• Is Part Of: Construction & building materials. Volume 262(2021)
• Publication Date: 2020-11-30
• Subjects: Asphalt mastic -- Aramid fibers -- Lignin fibers -- Sepiolite fibers -- Basalt fibers -- Rheological properties; Building materials -- Periodicals; 624.18
• DOI: 10.1016/j.conbuildmat.2020.120005
• Languages: English
• ISSNs: 0950-0618

Abstract

Highlights: The influence of different morphological fibers on asphalt mastic was studied. Cone penetration test was used to evaluate the shear strength of fiber asphalt mastic. The addition of fiber adversely affected the low temperature creep performance of asphalt mastic. Abstract: Asphalt mastic is a key component affecting the performance of asphalt mixtures. Fibers can efficiently improve the performance of asphalt mastic. Four types of fibers, including two types of flocculent fibers (lignin fibers and sepiolite fibers) and two types of bundle fibers (basalt fibers and aramid fibers), were selected to study the effect of fiber morphology on the performance of asphalt mastic in this study. Firstly, the thermal stability, the asphalt absorption, and the microscopic morphology of various fibers were tested. Secondly, relevant performance tests, including penetration, softening point, bending beam rheometer test (BBR), and dynamic shear rheology test (DSR) test, were conducted on asphalt mastic samples prepared with various fibers. The results show that the flocculent and the bundle fibers played different roles in asphalt mastic. The flocculent fibers could stabilize asphalt, while the bundle fibers could enhance the toughness. The addition of fibers into asphalt mastic improved rutting resistance.