环境因素作用下季冻区沥青混合料早期性能衰减定量评价

发布时间：2018-05-09 02:26

本文选题：沥青混合料 + 环境因素　；参考：《公路》2017年11期

【摘要】：研究季冻区沥青混合料在外界水、冰冻、老化等综合作用下早期路用性能衰减效应,并对其进行定量评价。对服役时间为1~4年的4类沥青混合料进行回收,并经加热制备相应试验试件;采用抽提试验确定回收料级配特性,并据此制备相同矿料级配的新沥青混合料;基于弯曲破坏试验、劈裂破坏试验等获取上述新旧两类沥青混合料的力学参数,得出沥青混合料力学性能参数在1~4年服役时间范围内的衰减曲线,实现季冻区沥青混合料早期性能衰减的定量评价。研究成果为今后季冻区沥青混合料的设计提供参考,对提高季冻区沥青混合料的路用性能具有一定意义。
[Abstract]:The early road performance attenuation effect of asphalt mixture in seasonal freezing area under the combined action of external water freezing aging and so on was studied and quantitatively evaluated. The four kinds of asphalt mixture with service time of 1 ~ 4 years were recovered and heated to prepare the corresponding test samples. The extraction test was used to determine the gradation characteristics of the recovered materials and the new asphalt mixture with the same mineral aggregate grading was prepared accordingly. Based on the bending failure test and splitting failure test, the mechanical parameters of the new and old asphalt mixture mentioned above are obtained, and the attenuation curves of the mechanical performance parameters of the asphalt mixture in the service time range of 1 ~ 4 years are obtained. Quantitative evaluation of early performance attenuation of asphalt mixture in seasonal freezing area is realized. The research results provide a reference for the design of asphalt mixture in the seasonal frozen area in the future and have certain significance for improving the pavement performance of the asphalt mixture in the seasonal frozen area.
【作者单位】：吉林建筑大学城建学院;吉林大学建设工程学院;吉林大学交通学院;
【基金】：国家自然科学基金,项目编号51508223 中国博士后科学基金,项目编号2014M561299 吉林省教育厅“十三五”科技项目,项目编号2016530 吉林省自然科学基金,项目编号20160101267JC
【分类号】：U414

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