Influence of limestone fillers on combustion characteristics of asphalt mortar for pavements

doi:10.1088/1674-1056/23/7/074703

›› 2014, Vol. 23 ›› Issue (7): 74703-074703.doi: 10.1088/1674-1056/23/7/074703

• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇下一篇

Influence of limestone fillers on combustion characteristics of asphalt mortar for pavements

吴珂^a, 朱凯^a, 吴昊^b, 韩君^{a c}, 王金昌^a, 黄志义^a, 梁培^d

a College of Civil and Architecture Engineering, Zhejiang University, Hangzhou 310027, China;
b Department of Chemical and Biochemical Engineering, Technical University of Denmark, Soltofts Plads, Building 229, DK-2800 Kgs. Lyngby, Denmark;
c Jiangsu Bao Li Asphalt Co. LTD, Wuxi 214422, China;
d College of Optical and Electronic Technology, China Jiliang University, Hangzhou 310018, China

收稿日期:2013-10-23 修回日期:2013-11-28 出版日期:2014-07-15 发布日期:2014-07-15
基金资助:
Project supported by the Natural Science Foundation of Zhejiang Province, China (Grant No. LY14E080014) and the National Natural Science Foundation of China (Grant Nos. 61154002 and 51078331).

Influence of limestone fillers on combustion characteristics of asphalt mortar for pavements

Wu Ke (吴珂)^a, Zhu Kai (朱凯)^a, Wu Hao (吴昊)^b, Han Jun (韩君)^{a c}, Wang Jin-Chang (王金昌)^a, Huang Zhi-Yi (黄志义)^a, Liang Pei (梁培)^d

a College of Civil and Architecture Engineering, Zhejiang University, Hangzhou 310027, China;
b Department of Chemical and Biochemical Engineering, Technical University of Denmark, Soltofts Plads, Building 229, DK-2800 Kgs. Lyngby, Denmark;
c Jiangsu Bao Li Asphalt Co. LTD, Wuxi 214422, China;
d College of Optical and Electronic Technology, China Jiliang University, Hangzhou 310018, China

Received:2013-10-23 Revised:2013-11-28 Online:2014-07-15 Published:2014-07-15
Contact: Huang Zhi-Yi, Liang Pei E-mail:hzy@zju.edu.cn;plianghust@gmail.com
About author:47.70.-n; 05.20.Dd; 42.70.Jk
Supported by:
Project supported by the Natural Science Foundation of Zhejiang Province, China (Grant No. LY14E080014) and the National Natural Science Foundation of China (Grant Nos. 61154002 and 51078331).

摘要/Abstract

摘要： Asphalt materials will be ignited and release significant toxic fumes within tunnel fires. Thus, combustion characteristics of asphalt materials used in road tunnel should be studied in order to limit such an adverse effect. In the present work we study the influence of limestone fillers on combustion characteristics of asphalt mortar by thermogravimetric and kinetic analysis. It is shown that the combustion of asphalt mortar is not just a linear superposition of asphalt and limestone. The limestone will increase the ignition point and the activation energy of the primary volatile release, and will catalyze the char formation from the primary volatile release. Kinetic analysis shows that the primary volatile release stage of asphalt mortar combustion can be explained by a three-dimensional diffusion model, the secondary volatile release and char combustion stage can be explained by a model under the assumption of random nucleation and nuclei growth, whereas the limestone decomposition stage appears to follow the one-dimensional phase boundary model.

关键词: asphalt mortar, limestone, combustion, kinetic analysis

Abstract: Asphalt materials will be ignited and release significant toxic fumes within tunnel fires. Thus, combustion characteristics of asphalt materials used in road tunnel should be studied in order to limit such an adverse effect. In the present work we study the influence of limestone fillers on combustion characteristics of asphalt mortar by thermogravimetric and kinetic analysis. It is shown that the combustion of asphalt mortar is not just a linear superposition of asphalt and limestone. The limestone will increase the ignition point and the activation energy of the primary volatile release, and will catalyze the char formation from the primary volatile release. Kinetic analysis shows that the primary volatile release stage of asphalt mortar combustion can be explained by a three-dimensional diffusion model, the secondary volatile release and char combustion stage can be explained by a model under the assumption of random nucleation and nuclei growth, whereas the limestone decomposition stage appears to follow the one-dimensional phase boundary model.

Key words: asphalt mortar, limestone, combustion, kinetic analysis

中图分类号: (Reactive and radiative flows)

47.70.-n

05.20.Dd (Kinetic theory) 42.70.Jk (Polymers and organics)

吴珂, 朱凯, 吴昊, 韩君, 王金昌, 黄志义, 梁培. Influence of limestone fillers on combustion characteristics of asphalt mortar for pavements[J]. , 2014, 23(7): 74703-074703.

Wu Ke (吴珂), Zhu Kai (朱凯), Wu Hao (吴昊), Han Jun (韩君), Wang Jin-Chang (王金昌), Huang Zhi-Yi (黄志义), Liang Pei (梁培). Influence of limestone fillers on combustion characteristics of asphalt mortar for pavements[J]. Chin. Phys. B, 2014, 23(7): 74703-074703.

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Influence of limestone fillers on combustion characteristics of asphalt mortar for pavements

Influence of limestone fillers on combustion characteristics of asphalt mortar for pavements

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