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引用本文:	翟瑞鑫,郝培文,李国锋,曾志武,李文辉.冻融作用下沥青混合料抗反射开裂性能研究[J].建筑材料学报,2018,21(6):1000-1004

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冻融作用下沥青混合料抗反射开裂性能研究
翟瑞鑫¹, 郝培文¹, 李国锋², 曾志武¹, 李文辉²
1.长安大学道路结构与材料交通运输行业重点实验室，陕西西安710064;2.云南省交通投资建设集团有限公司，云南昆明650228

摘要:

采用Overlay tester（OT）对大粒径透水沥青混合料（LSPM）进行多次冻融循环试验，分析了冻融循环作用下LSPM的抗反射开裂性能.结果表明：冻融循环作用对LSPM的抗反射开裂性能具有显著影响；OT试验能有效反映LSPM的抗反射开裂性能，可以用容许破坏次数和荷载损失率来共同评价LSPM抗反射开裂性能，采用指数模型能较好地表征和预测容许破坏次数随冻融循环次数的衰减状况；模拟冻融影响时应至少进行20次冻融循环；橡胶粉改性沥青和SBS改性沥青用于LSPM均具有良好的抗反射开裂性能，但SBS改性沥青混合料受冻融循环作用影响更大，粒径为301μm(60目)橡胶粉改性沥青混合料更适用于长期冻融地区的沥青路面.

关键词: 大粒径透水沥青混合料抗反射开裂性能橡胶粉改性沥青

DOI：103969/j.issn1007 9629201806022

分类号:

基金项目:国家自然科学基金资助项目（51478046）

Anti reflection Cracking Performance of Asphalt Mixture under Freeze Thaw Cycles

ZHAI Ruixin¹, HAO Peiwen¹, LI Guofeng², ZENG Zhiwu¹, LI Wenhui²

1.Key Laboratory for Road Structure and Materials of MOC, Changan University, Xian 710064, China;2.Yunnan Communications Investment & Construction Group Co., Ltd., Kunming 650228, China

Abstract:

Overlay tester（OT） was applied to simulate and analyze the anti reflection cracking performance of large stone porous asphalt mixture(LSPM) after different number of freeze thaw cycles. Results indicate that freeze thaw cycle has a significant effect on anti reflection cracking performance of LSPM. OT can well reflect the anti reflection cracking performance of asphalt mixture. Load loss rate and tolerance failure times are put forward to evaluate the anti reflection cracking performance. The exponential model is suitable to characterize and predict the attenuation of tolerance failure times. At least 20 freeze thaw cycles are recommended for the test. Rubber powder modified asphalt mixtures and SBS modified asphalt mixture have good anti reflection cracking performance for LSPM, however SBS modified asphalt mixture is more affected by freeze thaw action. 301μm(60mesh) rubber powder modified asphalt mixtures is recommended for long term freeze thaw area.

Key words: large stone porous asphalt mixture anti reflection cracking performance rubber powder modified asphalt