Investigation on the Combustion Process and Flame Retardant Performance of Asphalt with Metal Hydroxides

Abstract:

The combustion performance of adding different metal hydroxide flame retardants in asphalt was investigated by the limit oxygen index test, and the flame retardant process of hydroxide flame retardant was studied by thermogravimetric analysis. The results showed that calcium hydroxide, magnesium hydroxide, aluminum hydroxide all play positive roles on flame retardancy of asphalt. Aluminum hydroxide has the best effect on flame retardation; calcium hydroxide and magnesium hydroxide show similar flame retardation. The temperature range of the decomposition of different metal hydroxide was different. Aluminum hydroxide has the lowest decomposition temperature, while calcium hydroxide has the highest decomposition temperature. Barrier layer composed of metal oxides is formed after the decomposition of flame retardant , which can prevent the further burning of asphalt.

• Periodical: Advanced Materials Research (Volumes 1065-1069)
• Pages: 749-754
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1065-1069.749
• Online since: December 2014
• Authors: Bin Wu, Zhi Yi Huang*, Kai Zhu
• Keywords: Asphalt, Flame Retardant Performance, Metal Hydroxide, Thermogravimetry (TG)

References

[1] Wu S, Cong P, Yu J, et al. Experimental investigation of related properties of asphalt binders containing various flame retardants. Fuel. 2006, 85(9): 1298-1304.

DOI: 10.1016/j.fuel.2005.10.014

[2] Huang Y, Zhu K, Wu K, et al. Study of flame-retardant mechanism of Mg(OH)2 on bitumen[J]. Fire science and Technology. 2013, 32(11): 1263-1266. (in Chinese).

[3] Xu T, Huang X, Zeng L. Influences of aluminum hydroxide pyrolysis on asphalt flame and processing properties. Journal of Building Materials. 2008, 11(5): 561-566. (in Chinese).

[4] Yu J, Cheng S, Wu D, et al. A study on road performance of SMA modified bitumen mixtures adding ATH flame-retardant. Highway. 2008(01): 184-187. (in Chinese).

[5] Ke W, Kai Z, Jun H, et al. Non-isothermal kinetics of styrene-butadiene-styrene asphalt combustion. Chinese Physics B. 2013, 22(6): 68801.

DOI: 10.1088/1674-1056/22/6/068801

[6] Zhu K, Huang Z, Wu K, et al. Hydrated lime modification of asphalt mixtures with improved fire performance [J]. Journal of Zhejiang University (Engineering Science), 2014, 48(8) (in Chinese).

[7] Lu H, Li X, Zhang X et al. Compared rheology of asphalt mastics performance with hydrated lime and limestone filer. 2009(11). (in Chinese).

[8] Hu H, Sha A. Influence of powder limit and dosage on the performance of asphalt mixture. Anhui Architecture. 2004, 11(2): 108-109 (in Chinese).