Influencing of compounding flame retardants with ATH/MMT on performance of asphalt mixture(PDF)
长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]
- Issue:
- 2020年2期
- Page:
- 1-9
- Research Field:
- 道路工程
- Publishing date:
Info
- Title:
- Influencing of compounding flame retardants with ATH/MMT on performance of asphalt mixture
- Author(s):
- SHEN Aiqin; SU Yuxuan; YANG Xiaolong; WANG Han; ZHAO Wending
- （1. School of Highway, Changan University, Xian 710064, Shaanxi, China; 2. Jilin Traffic Planning andDesign Institute, Changchun 130000, Jilin, China）
- Keywords:
- road engineering; hydroxide flame retardant; experiment study; asphalt mixture; ATH; MMT
- PACS:
- -
- DOI:
- -
- Abstract:
- In order to solve the existing security issues of long tunnels asphalt pavement currently, and improve the flame retardant performance of highway tunnel asphalt pavement， metal aluminum hydroxide（ATH） and montmorillonite（MMT） was chosen as compounding flame retardants and then SBS modified asphalt mixture were prepared. Rutting test, low temperature blinding, Marshall submerge experiment, freezethaw indirect tension test were used to analysis the impact of ATH/MMT mixed flame retardant on asphalt mixtures paving performance and flame retardant performance. The results show that ATH/MMT compounding flame retardant can improve the asphalt materials limiting oxygen index(LOI) by 21.2% to above 25%，and can increase asphalt materials flammability rating from flammable to flame retardant, and can reach the standard of selfextinguishing materials. ATH/MMT compounding flame retardant can reduce the burning duration of asphalt mixture. The burning duration can be reduce by nearly double, when the dosage of MMT and ATH is 3% and 10%, mass fraction, same below. ATH/MMT compounding flame retardant can also reduce the loss rate of combustion quality of asphalt mixture, and improve the burning residual Marshall stability of the asphalt mixture. It also can ensure that the burned Marshall test piece is basically complete in structure and has good mechanical properties. At the same time, ATH/MMT compounding flame retardant reduce the volatile organic compounds (VOC) volatilization during the burning process of asphalt mixture, reduce the peak concentration during VOC volatilization and accelerate the diffusion rate of VOC products. These all explain that ATH/MMT flame retardant can significantly improve the flame retardant and smoke suppression performance of asphalt mixture, and can improve asphalt mixtures high temperature stability and water stability, but reduce the low temperature crack resistance of the asphalt mixture to some extent. Although it can still meet high performance requirements, but the amount of flame retardant should not be too large. 8 tabs, 11 figs, 30 refs.
Last Update: 2020-04-09