| 硅藻土沥青及沥青混合料低温抗裂机理(英文) |
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| 引用本文： | 谭忆秋,单丽岩,房军,张兴友.硅藻土沥青及沥青混合料低温抗裂机理(英文)[J].东南大学学报,2009,25(1). |
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| 作者姓名： | 谭忆秋 单丽岩 房军 张兴友 |
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| 作者单位： | 谭忆秋,单丽岩,Tan Yiqiu,Shan Liyan(哈尔滨工业大学交通科学与工程学院,哈尔滨,150090);房军,Fang Jun(大连海事大学交通与物流工程学院,大连,116026);张兴友,Zhang Xingyou(长春公路规划勘察设计院,长春,130000)
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| 摘 要： | 对一种基质沥青和3种硅藻土沥青进行了差示热扫描分析,并结合相应的混合料约束试件的温度应力试验分析了硅藻土沥青的低温抗裂机理.结果表明:硅藻土沥青有优于基质沥青的低温性能;玻璃态转化温度可以较好地反映硅藻土沥青的低温性能;玻璃态转化温度与破断温度有较高的相关性.另外还进行了相应的4种沥青混合料的低温弯曲试验、低温压缩试验和收缩系数试验.结果表明:硅藻土沥青混合料的低温性能优于基质沥青混合料;硅藻土沥青混合料临界弯曲应变能密度及压缩应变能密度均大于基质沥青混合料;沥青混合料加入硅藻土后收缩系数降低.在此基础上,从混合料收缩性能和破坏能量2个角度分析了硅藻土沥青混合料的低温抗裂机理.
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| 关 键 词： | 硅藻土沥青 低温性能 玻璃态转化温度 差示热扫描分析 抗裂机理 |
Anti-cracking mechanism of diatomite asphalt and diatomite asphalt mixture at low temperature |
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| Tan Yiqiu Shan Liyan Fang Jun Zhang Xingyou.Anti-cracking mechanism of diatomite asphalt and diatomite asphalt mixture at low temperature[J].Journal of Southeast University(English Edition),2009,25(1). |
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| Authors: | Tan Yiqiu Shan Liyan Fang Jun Zhang Xingyou |
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| Institution: | 1School of Transportation Science and Engineering;Harbin Institute of Technology;Harbin 150090;China;2Transportation and Logistics Engineering College;Dalian Maritime University;Dalian 116026;China;3Changchun Highway Designing Institute for Layout and Reconnaissance;Changchun 130000;China |
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| Abstract: | A kind of neat asphalt and three kinds of diatomite asphalt are tested using differential scanning calorimetry(DSC).The anti-cracking mechanism of diatomite asphalt is analyzed by DSC and the thermal stress restrained specimen test(TSRST)of the asphalt mixtures.The results show that the low temperature performance of diatomite asphalt is better than that of neat asphalt.The glass transition temperature can reflect the low temperature performance of the diatomite asphalt better and has a good relationship wi... |
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| Keywords: | diatomite asphalt low temperature performance glass transition temperature differential scanning calorimetry anti-cracking mechanism |
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