铁尾矿沥青混合料水稳定性试验研究
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摘要
为掌握沥青混合料中掺加铁尾矿后的抗水损害能力,进行了静态冻融劈裂试验、浸水马歇尔试验及动态汉堡车辙试验,综合评价了铁尾矿沥青混合料的水稳定性。试验结果表明:铁尾矿沥青混合料在静态和45℃时均表现出较好的水稳定性。当温度升至60℃时,75%掺量的铁尾矿沥青混合料的水稳定性会急剧降低,而掺2%铁尾矿砂沥青混合料的水稳定性与常规沥青混合料的水稳定性的差距不大。验证了铁尾矿砂部分替代矿粉对混合料水稳定性的影响较小,铁尾矿沥青混合料的水稳定性对温度的敏感性比常规沥青混合料的高。
In order to grasp the moisture damage resistance of the asphalt mixture after adding iron tailings, the static freeze-thaw split test, the water-immersed Marshall test and the dynamic Hamburg rutting test are used to comprehensively evaluate the moisture stability of the asphalt mixture with iron tailings. It shows that the asphalt mixture with iron tailings shows good moisture stability under static conditions at 45 ℃. When the temperature rises to 60 ℃, the moisture stability of the iron tailings asphalt mixture with 75% sharply decreases. The moisture stability of the asphalt mixture with 2% iron tailings is not quite different from that of the conventional asphalt mixture. It is verified that the partial substitution of iron tailings for mineral powder has little effect on the water stability of the asphalt mixture, and the moisture stability of the asphalt mixture with iron tailings is more sensitive to temperature than conventional asphalt mixture.
In order to grasp the moisture damage resistance of the asphalt mixture after adding iron tailings, the static freeze-thaw split test, the water-immersed Marshall test and the dynamic Hamburg rutting test are used to comprehensively evaluate the moisture stability of the asphalt mixture with iron tailings. It shows that the asphalt mixture with iron tailings shows good moisture stability under static conditions at 45 ℃. When the temperature rises to 60 ℃, the moisture stability of the iron tailings asphalt mixture with 75% sharply decreases. The moisture stability of the asphalt mixture with 2% iron tailings is not quite different from that of the conventional asphalt mixture. It is verified that the partial substitution of iron tailings for mineral powder has little effect on the water stability of the asphalt mixture, and the moisture stability of the asphalt mixture with iron tailings is more sensitive to temperature than conventional asphalt mixture.
引文
[1]闫满志,白丽梅,张云鹏,等.我国铁尾矿综合利用现状问题及对策[J].现代矿业,2008,24(7):9-13.(YAN Man-zhi,BAI Li-mei,ZHANG Yun-peng,et al.Current situation,problems and countermeasures of comprehensive utilization of iron tailings in China[J].Modern Mining,2008,24(7):9-13.(in Chinese))
[2]Mekdim T,Rafiqul A.Towards a mechanistic understanding of moisture damage in asphalt concrete[J].Journal of Materials in Civil Engineering,2015,27(3):1-10.
[3]祝海折,张晓燕,李智慧.沥青混合料水稳定性试验研究[J].公路工程,2016,41(5):212-214.(ZHU Hai-zhe,ZHANGXiao-yan,LI Zhi-hui.Research on the water stability of the asphalt mixture[J].Highway Engineering,2016,41(5):212-214.(in Chinese))
[4]Howard I L,Doyle J D.Rutting and moisture damage wheel tracking comparison of laboratory and field compacted asphalt concrete[A].Proceedings of American Society of Civil Engineers Second Conference on Green Streets,Highways,and Development[C].Austin,Texas,United States:American Society of Civil Engineers,2013:106-116.
[5]Guo R,Prozzi J A.Characterization of hamburg wheel tracking device testing results[A].Proceedings of the Ninth International Conference on Applications of Advanced Technology in Transportation[C].Reston:American Society of Civil Engineers,2006:105-110.
[6]齐琳,沙爱民,陈凯.沥青混合料水稳定性汉堡车辙试验研究[J].武汉理工大学学报,2009,31(8):42-45.(QILin,SHA Ai-min,CHEN Kai.Research on the water stability of asphalt mixtures based on the HWTD[J].Journal of Wuhan University of Technology,2009,31(8):42-45.(in Chinese))
[7]李洪华.沥青路面车辙成因分析及车辙试验研究[D].西安:长安大学,2008.(LI Hong-hua.Mechanism analysis on rutting in asphalt pavement and study on rutting test[D].Xi’an:Chang’an University,2008.(in Chinese))
[8]马丽霞.用汉堡车辙仪评价沥青混合料性能[J].交通世界,2013(8):270-272.(MA Li-xia.Evaluation of asphalt mixture performance with HWTD[J].Transpoworld,2013(8):270-272.(in Chinese))
[2]Mekdim T,Rafiqul A.Towards a mechanistic understanding of moisture damage in asphalt concrete[J].Journal of Materials in Civil Engineering,2015,27(3):1-10.
[3]祝海折,张晓燕,李智慧.沥青混合料水稳定性试验研究[J].公路工程,2016,41(5):212-214.(ZHU Hai-zhe,ZHANGXiao-yan,LI Zhi-hui.Research on the water stability of the asphalt mixture[J].Highway Engineering,2016,41(5):212-214.(in Chinese))
[4]Howard I L,Doyle J D.Rutting and moisture damage wheel tracking comparison of laboratory and field compacted asphalt concrete[A].Proceedings of American Society of Civil Engineers Second Conference on Green Streets,Highways,and Development[C].Austin,Texas,United States:American Society of Civil Engineers,2013:106-116.
[5]Guo R,Prozzi J A.Characterization of hamburg wheel tracking device testing results[A].Proceedings of the Ninth International Conference on Applications of Advanced Technology in Transportation[C].Reston:American Society of Civil Engineers,2006:105-110.
[6]齐琳,沙爱民,陈凯.沥青混合料水稳定性汉堡车辙试验研究[J].武汉理工大学学报,2009,31(8):42-45.(QILin,SHA Ai-min,CHEN Kai.Research on the water stability of asphalt mixtures based on the HWTD[J].Journal of Wuhan University of Technology,2009,31(8):42-45.(in Chinese))
[7]李洪华.沥青路面车辙成因分析及车辙试验研究[D].西安:长安大学,2008.(LI Hong-hua.Mechanism analysis on rutting in asphalt pavement and study on rutting test[D].Xi’an:Chang’an University,2008.(in Chinese))
[8]马丽霞.用汉堡车辙仪评价沥青混合料性能[J].交通世界,2013(8):270-272.(MA Li-xia.Evaluation of asphalt mixture performance with HWTD[J].Transpoworld,2013(8):270-272.(in Chinese))