| 摘要: |
| 采用类似软化点环的小盛样皿自然流动成型制备显微相态观测样本，探讨样本平整度及放大倍数对获取真实反映改性剂显微相态的影响；在此基础上，观测了不同储存时间的SBS改性沥青样本和不同厂家提供的成品改性沥青的显微相态，并对改性沥青宏观性能指标进行测试.结果表明：不加盖玻片可以保证改性剂不受外力的扰动，显微相态更加真实；SBS改性剂含量（质量分数）约45%时，改性剂经过2个月的溶胀发育，形成了类似“蜥蜴皮肤”的均匀、密实、稳定的互穿网状结构；成品改性沥青普遍存在离析现象，其显微相态呈现聚结形态.可见，SBS改性沥青显微相态与其宏观性能指标相关性较大.荧光显微技术在检测改性沥青性能指标方面，具有制样简单、测试方便迅速的极大优势. |
| 关键词: SBS改性沥青 样本平整度 显微相态 网状结构 宏观性能 |
| DOI：103969/j.issn1007 9629201601020 |
| 分类号: |
| 基金项目:上海市浦江人才计划项目（12PJD011）；江西省交通厅项目（2013C0012） |
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| Correlation between Phase Microstructure and Macroscopic Performance of SBS Modified Bitumen |
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WANG Ming1, LIU Liping1, WU Houxuan2
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1.Key Laboratory of Road and Traffic Engineering of Ministry of Education, Tongji University, Shanghai 201804, China;2.Construction Office of Highway Reconstruction Project from Nanchang to Zhangshu,Transportation Department of Jiangxi Province, Fengcheng 331131, China
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| Abstract: |
| The casting molding with a small dish container was used which for prepare the softening point test disk used as the microscopic observation sample. Then the effects of the samples flatness and magnification on obtaining a good and true microscopic phase image of the modifier were investigated. Based on this， the microscopic phases of both bitumen samples modified by SBS with different storage durations as designed in the experiments and samples produced by different manufacturers were observed. In addition， the macroscopic properties of modified bitumen were also tested. The results show that the samples without cover glass are not influenced by the external perturbation so that the microscopic images are more realistic; there is an interpenetrating and stable network structure formed like ‘lizard skin’ in the sample with 45%（by mass） SBS modifier after swelling for two months. This indicates an excellent macroeconomic performance. ‘Segregation’ phenomena were found in the asphalt samples produced by manufacturers, and a wide variety of ‘coalescence’ was found in microscopic phase. Therefore, the correlation between phase microstructure and macroeconomic performance of SBS modified bitumen is significant. Fluorescence microscopic technique has a great advantage in the detection of modified asphalt performance indicators for a simple preparation and convenient testing method. |
| Key words: SBS modified bitumen sample flatness microscopic phase network structure macroscopic property |
