| 摘要: |
| 采用直剪试验并以剪切破坏能为评价指标，分析了黏层油类型、洒布量、土工布铺设工艺和路面使用环境等因素对沥青路面加铺结构中土工布夹层黏结性能的影响，同时通过带切缝复合梁弯曲疲劳试验验证了土工布夹层黏结性能与其抗反射裂缝效应的相关性.结果表明：采用乳化沥青、基质沥青和SBS改性沥青作为土工布夹层黏层油时，其优选洒布量分别为12，09，08kg/m2，其中SBS改性沥青黏层油的黏结效果最好，可达到常规加铺结构层间黏结水平；SBS改性沥青黏层油作1次洒布时，上层混合料摊铺温度较低将对土工布夹层黏结性能产生不利影响，SBS改性沥青黏层油作2次洒布时，上层混合料摊铺温度对其黏结性能无显著影响；随着服役温度升高或浸水时间延长，土工布夹层黏结性能将显著降低，而且相比于常规加铺结构层间黏结性能，其受温度影响较小，受浸水作用影响较大；土工布夹层的黏层性能与其抗反射裂缝效应具有良好的正相关性. |
| 关键词: 道路工程 土工布夹层 剪切破坏能 黏层油 铺设工艺 使用环境 |
| DOI：103969/j.issn.1007 9629201705015 |
| 分类号: |
| 基金项目:国家自然科学基金资助项目（51478046）；长安大学优秀博士学位论文培育资助项目（310821150015） |
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| Adherence of Geotextile Interlayer in Asphalt Overlay |
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ZHANG Haiwei1, HAO Peiwen1, TANG Cheng2, PANG Yuan2
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1.Key Laboratory of Highway Engineering in Special Region of Ministry of Education, Changan University, Xi an 710064, China;2.College of Highway, Changan University, Xian 710064, China
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| Abstract: |
| The influence of tack coat type and content, paving technology and service environment on the adherence of asphalt overlay with geotextile interlayer were investigated in terms of shear damage energy based on layer parallel direct shear test. The correlation between adherence and anti reflective cracking performance of geotextile interlayer was also verified through three point fatigue bending beam test. The results show that the optimum content for emulsified asphalt, base asphalt, SBS modified asphalt is 12, 09, 08kg/m2 respectively. The adherence of geotextile interlayer with the SBS modified asphalt which can reach the adherence level of common asphalt overlay is superior to those offered by the emulsified asphalt or base asphalt. Lower shear resistance is obtained for lower asphalt mixture paving temperature when SBS modified asphalt is sprayed one time. However, there is no difference in the adherence for different asphalt mixture paving temperatures when SBS modified asphalt is sprayed twice. The adherence of geotextile interlayer becomes poor when the test temperature rises or the immersion time increases. The influence of test temperature on adherence affects the geotextile interlayer less than the reference, while the reverse is true for the influence of water. There is a strong positive correlation between adherence and anti reflective cracking performance for geotextile interlayer. |
| Key words: road engineering geotextile interlayer shear damage energy tack coat paving technology service environment |
