|Table of Contents|

Evaluation on thermal stability, rheological properties and fatigue performance of gussasphalt binder(PDF)

长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]

Issue:
2026年2期
Page:
43-56
Research Field:
道路工程
Publishing date:

Info

Title:
Evaluation on thermal stability, rheological properties and fatigue performance of gussasphalt binder
Author(s):
NIU Dong-yu1;  LIU Kai1;  MA Fang-chen2; 3;  LA Shi-ren4;  ZHANG Yuan5; ZHAO Jin-long6;  WANG Di7
Keywords:
pavement engineering;  gussasphalt binder;  pyrolysis parameter;  fatigue life;  rheological property;  Qingchuan rock asphalt;  thermogravimetric analysis
PACS:
U414
DOI:
10.19721/j.cnki.1671-8879.2026.02.004
Abstract:
To investigate the application performance of gussasphalt(GA)binder in bridge deck pavement and its modification enhancement approaches, various properties of GA compositely modified with Qingchuan rock asphalt(QRA)and styrene-butadiene block copolymer(SBS)were evaluated. SBSs with different amounts(2% and 3%)and QRAs with different amounts(5%, 10% and 15%)were selected as modifiers to prepare GAs. The microscopic characteristics and thermal stabilities of two groups of individually modified and six groups of compositely modified GAs were tested through the Fourier transform infrared spectroscopy(FTIR)and thermogravimetric analysis(TGA). The rheological and fatigue properties of GAs with different QRA and SBS amounts were evaluated using the multiple stress creep and recovery(MSCR)test, bending beam rheometer(BBR)test, linear amplitude sweep(LAS)test and time sweep(TS)test. The research results indicate that the modification of SBS and QRA to GA is physical blending modification, and their synergistic modification effect can significantly enhance the thermal stability and creep recovery rate of GA, and reduce its non-recoverable creep compliance, thereby enhancing its deformation resistance and reducing its non-recoverable deformation. When the amounts of SBS and QRA are 3% and 15%(S-3Q-15), respectively, the high-temperature rutting resistance of GA is superior. As the amount of SBS increases, the creep stiffness of GA decreases, the creep rate increases, and the low-temperature crack resistance improves. When the amount of SBS is 3%, the low-temperature rheological property of GA enhances significantly. The material integrity of GA increases with the increases in amounts of SBS and QRA, and the fatigue life prolongs, among which the S-3Q-15 has the highest fatigue life, reaching 42 300 cycles, and the fatigue crack calculation value of DSR-C model for S-3Q-15 is the smallest, at 1.191 mm. In summary, it is recommended that the SBS amount of 3% and the QRA amount of 15% is the optimal amount combination for GA.7 tabs, 14 figs, 30 refs.

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Last Update: 2026-04-20