Simulation study on flame retardant effect of warm‐mixed flame retardant pavement in highway tunnel

Authors

Abstract

In order to obtain the flame retardant effect of the warm-mixed flame retardant asphalt pavement in highway tunnels, based on the finite element method and thermodynamics theory, the thermal analysis module of Ansys finite element software was used to study the flame retardant effect of ordinary asphalt pavement, flame retardant asphalt pavement, and warm-mixed flame retardant asphalt pavement under different fire scales. The maximum temperature of the three types of pavement increased with the increase in the fire scale. Under any fire scale, the flame retardant effect of the warm-mixed flame retardant asphalt pavement was increased by 4.9%–8.5% compared with that of the ordinary asphalt pavement. The smaller fire scale indicated a more obvious cooling effect. Under the minimum fire scale, the temperature below the asphalt pavement was higher than the aging temperature of the asphalt. When the fire scale was 5–100 MW, the average growth rate of the mixture required to complete the repair of flame retardant asphalt pavement and warm-mixed flame retardant asphalt pavement was −9.3% and −12.8%, respectively. The relationship model of the maximum temperature of pavement and the fire scale was proposed, and the quality of the mixture required for post-disaster repair was calculated, which provided a reference for the prevention and repair of tunnel fires.

Publication Date

3-17-2023

DOI

10.14048/j.issn.1671-2579.2023.01.029

First Page

168

Last Page

172

Submission Date

March 2025

Recommended Citation

(2023) "Simulation study on flame retardant effect of warm‐mixed flame retardant pavement in highway tunnel," Journal of China & Foreign Highway: Vol. 43: Iss. 1, Article 73.
DOI: 10.14048/j.issn.1671-2579.2023.01.029
Available at: https://zwgl1980.csust.edu.cn/journal/vol43/iss1/73