改性沥青和聚酯纤维对AC低温性能影响研究

重庆交通大学学报（自然科学版） ›› 2010, Vol. 29 ›› Issue (5): 722-726.

改性沥青和聚酯纤维对AC低温性能影响研究

曾榕彬¹, 张远航², 吴国雄³

1.重庆市市政设计研究院, 重庆 400020; 2.重庆市交通规划勘察设计院, 重庆 401121; 3.重庆交通大学土木建筑学院, 重庆 400074

收稿日期:2010-08-11 修回日期:2010-08-22 出版日期:2010-10-15 发布日期:2015-01-22
作者简介:曾榕彬(1982—),男,广西阳朔人,硕士,主要从事路桥工程勘察设计工作。E-mail:gghope@qq.com。
基金资助:
湖北省重点科技项目( 054307)

Research on Influence of Modified Asphalt and Polyester Fiber on Low Temperature Performance of Asphalt Concrete

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, China; 3.School of Civil Engineering & Architecture, Chongqing Jiaotong University, Chongqing 400074, China

Received:2010-08-11 Revised:2010-08-22 Online:2010-10-15 Published:2015-01-22

摘要/Abstract

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。

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

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 asphalt mixtures at different temperature range shows different trends, meanwhile, a critical temperature (about- 10^C) exists, which can correspondingly generate a peak strength; the order of failure loads of three kinds of mixtures are: modified asphalt > fiber mixture > ord inary asphalt mixture, and failure strains have the same rules; in a sense, the anti-cracking ability of fiber asphalt may be better than that of SBS modified asphalt. Fracture toughness obta ined by J-integral strain energy test can be used as effective evaluation index of anti-cracking performance of asphalt mixtures under low temperature.

Key words: polyester fiber, modified asphalt concrete, low temperature anti-cracking perform ance, J-integral strain energy test

中图分类号:

U414

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): 722-726.

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(Natural Science), 2010, 29(5): 722-726.

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