| 改性沥青和聚酯纤维对AC低温性能影响研究 |
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| 引用本文： | 曾榕彬,张远航,吴国雄.改性沥青和聚酯纤维对AC低温性能影响研究[J].重庆交通大学学报(自然科学版),2010,29(5). |
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| 作者姓名： | 曾榕彬 张远航 吴国雄 |
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| 作者单位： | 重庆市市政设计研究院,重庆,400020;重庆市交通规划勘察设计院,重庆,401121;重庆交通大学,土木建筑学院,重庆,400074 |
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| 基金项目： | 湖北省重点科技项目(054307) |
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| 摘 要： | 通过3种试验方法对Superpave13和Superpave19级配下沥青混凝土的低温抗裂性能进行了研究。结果表明:添加纤维和SBS改性沥青使得沥青混合料出现破坏应变能、破坏应力、应变增长、劲度模量减小的趋势,可以明显提高沥青混合料的低温抗开裂能力,并且各型沥青混合料的劈裂破坏强度在不同的温度范围变化趋势不同,存在一临界温度(-10℃左右)使其出现峰值。3种混合料破坏荷载的大小顺序为:改性沥青>纤维混合料>普通沥青混合料,破坏应变也有同样的规律。由积分应变能试验获得的断裂韧度可以作为评价沥青混合料低温抗裂能力的有效指标。
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| 关 键 词： | 聚酯纤维 改性沥青混凝土 低温抗裂性能 J-积分应变能试验 |
Research on Influence of Modified Asphalt and Polyester Fiber on Low Temperature Performance of Asphalt Concrete |
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| ZENG Rong-bin,ZHANG Yuan-hang,WU Guo-xiong.Research on Influence of Modified Asphalt and Polyester Fiber on Low Temperature Performance of Asphalt Concrete[J].Journal of Chongqing Jiaotong University,2010,29(5). |
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| Authors: | ZENG Rong-bin ZHANG Yuan-hang WU Guo-xiong |
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| Institution: | ZENG Rong-bin1,ZHANG Yuan-hang2,WU Guo-xiong3(1.Chongqing Municipal Design & Research Institute,Chongqing 400020,China,2.Chongqing Communications Planning,Survey & Design Institute,Chongqing 401121,3.School of Civil Engineering & Architecture,Chongqing Jiaotong University,Chongqing 400074,China) |
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| Abstract: | Three kinds of laboratory experiments are conducted to study the anti-cracking performance of asphalt concrete with gradation of Superpave13 and Superpave19 under low temperature.The results show that: adding fiber and SBS modified asphalt can generate the mixtures' failure strain and failure stress,increase the strain and reduce the stiffness modulus,thus adding fiber and SBS modified asphalt can significantly improve the anti-cracking ability at low temperature;the cleavage fracture strength of different ... |
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| Keywords: | polyester fiber modified asphalt concrete low temperature anti-cracking performance J-integral strain energy test |
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