| 基于粘度和延度变化的沥青抗老化性能评价方法 |
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| 引用本文： | 果培龙,张争奇,王秉纲,丁湛.基于粘度和延度变化的沥青抗老化性能评价方法[J].长安大学学报(自然科学版),2008,28(6):11-15. |
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| 作者姓名： | 果培龙 张争奇 王秉纲 丁湛 |
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| 作者单位： | 长安大学特殊地区公路工程教育部重点实验室，长安大学环境科学与工程学院 |
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| 基金项目： | 国家西部交通建设科技项目 |
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| 摘 要： | 针对当前道路沥青的抗老化性能评价方法的不足,研究了5种道路沥青老化过程中的粘度和延度的变化规律,提出了基于135℃粘度和15℃延度的沥青抗老化性能评价方法,并建立了评价沥青抗老化性能的老化度和抗老化系数指标。研究结果表明:该评价方法及指标可以区分不同沥青在整个老化过程中的抗老化性能,评价指标中老化度可以评价不同老化时间的老化程度,有助于预测沥青路面在老化作用下出现开裂病害的时间;抗老化系数体现了沥青本身的抗老化性能,为沥青的选择提供了依据。
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| 关 键 词： | 道路工程 沥青 抗老化性能 评价方法 老化度 抗老化系数 |
Evaluation on anti-aging performance of asphalt based on changes of viscosity and ductility |
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| LI Pei-long,ZHANG Zheng-qi,WANG Bing-gang,DING Zhan.Evaluation on anti-aging performance of asphalt based on changes of viscosity and ductility[J].JOurnal of Chang’an University:Natural Science Edition,2008,28(6):11-15. |
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| Authors: | LI Pei-long ZHANG Zheng-qi WANG Bing-gang DING Zhan |
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| Institution: | LI Pei-long1,ZHANG Zheng-qi1,WANG Bing-gang1,DING Zhan2 |
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| Abstract: | The current evaluation methods of asphalt anti-aging performance have some deficiencies.So variation characteristics of viscosity and ductility during aging process are studied,and then a new evaluation method is developed,and the aging degree and anti-aging indices are advanced.The analysis results indicate that the evaluation method and parameters can be used to delimit aging performance of different asphalts.The aging degree can be used to evaluate the aging level of asphalt with aging time,which can predict the emerging time of cracks at pavement because of asphalt aging.The anti-aging indices can reflect the anti-aging performance of asphalt,they can offer a reference for choosing asphalt in project.6 tabs,3 figs,9 refs. |
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| Keywords: | road engineering asphalt anti-aging performance evaluation method aging degree anti-aging index |
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