Application of High-elastic Modified Asphalt in Steel Bridge Pavement |
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引用本文: | 郝增恒,吴文军,王民.Application of High-elastic Modified Asphalt in Steel Bridge Pavement[J].公路交通科技,2010,4(2):5-10. |
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作者姓名: | 郝增恒 吴文军 王民 |
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作者单位: | 1China Merchants Chongqing Communications Research and Design Instit
ute Co,
Ltd,Chongqing400067,China;
2 Chongqing Zhixiang Paving Technology
Engineering Co,Ltd,Chongqing401336,China |
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摘 要: | To cope with the fatigue cracking occurred to the asphalt mixture on steel deck avement,it is put forward that the fatigue life of asphalt mixture can be improved by reducing the ailure energy of each hysteresis loop of asphalt mixture according to the cumulative dissipated energy and hysteresis loop theory in the principle of viscoelasticity for asphalt mixture Based on this principle,a kind of modified asphalt with high elasticity was developed,and its high and low temperature performances and fatigue performances were also tested The result shows that (1) low temperature deformability of the high?elastic modified asphalt mixture has remarkably improved and low temperature bending strain of girder at -10 ℃ is above 10 000 με; (2) the fatigue life of modified asphalt mixture with high elasticity has greatly improved by 4?point bending beam test compared with common modified asphalt mixture The fatigue life at 1 000 με deformability is about 19 million times which is about 20 times longer than that of ordinary asphalt mixture
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关 键 词: | bridge engineering steel bridge pavement modified asphalt with high elasticity fatigue cumulative dissipated energy hysteresis loop |
收稿时间: | 2008-04-29 |
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