期刊
CONSTRUCTION AND BUILDING MATERIALS
卷 302, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.conbuildmat.2021.124148
关键词
Tunnel asphalt pavement; Modified-asphalt; OMMT; Pyrolysis characteristic; Flame-retardant performance; Mechanism model
资金
- National Natural Science Foundation of China [51968006]
- Guangxi Higher Education Undergraduate Teaching Reform Project [2019JGB100]
The study demonstrates that OMMT-modified asphalt can increase ignition time and ignition temperature, reduce heat release, and effectively inhibit smoke emission.
To investigate the performance and mechanism of flame retardance and smoke suppression of organic montmorillonite (OMMT) modified asphalt, limiting oxygen index (LOI) and dynamic flame-retardant performance tests were performed. The pyrolysis characteristics of modified asphalt were analyzed using thermalgravimetricFourier transform infrared (TG-FTIR) analysis. The results show that the OMMT particle size has little effect on modified-asphalt performance. OMMT increases the ignition time and ignition temperature, and it reduces heat release during combustion. OMMT also significantly inhibits smoke emission during pyrolysis and combustion of modified asphalt. Finally, a flame-retardant and smoke-suppression mechanism model of OMMT-modified asphalt was established.
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