自调温沥青混合料路用性能及调温性能研究 |
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引用本文: | 符适,贾良,黄士周,刘帆,尘福涛,李荣旭.自调温沥青混合料路用性能及调温性能研究[J].路基工程,2021,0(4):60-64. |
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作者姓名: | 符适 贾良 黄士周 刘帆 尘福涛 李荣旭 |
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作者单位: | 1.江苏高速公路工程养护有限公司,江苏淮安 223001 |
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基金项目: | 交通运输部行业重点科技项目:新型生态排水沥青路面关键技术研究及示范应用(2018-TG-003) |
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摘 要: | 选择一组密级配和一组开级配同时进行不同掺量的室内试验,探究自调温材料对沥青混合料空隙率、水稳定性能、高温稳定性以及析漏和飞散的影响规律;同时,对不同级配自调温材料沥青混合料路面进行温度观测,探究其调温幅度和边界。结果表明:随着自调温材料掺量的逐渐增多,开级配沥青混合料的空隙率不断减小且减小速率逐渐增大,稳定度先减小后增大,动稳定度逐渐减小,析漏损失基本维持在0.5 %~0.6 %之间;密级配沥青混合料的空隙率和动稳定度均逐渐减小,对稳定度影响较小;夏季温度高时,自调温路面自动储能吸热,降低密级配路面温度4.0 ℃左右,降低开级配路面温度2.0 ℃左右;冬季温度低时,自调温路面自动释放热量,提高路面温度约0.4 ~1.0 ℃。
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关 键 词: | 自调温材料 改性沥青 沥青混合料 路用性能 自调温性能 |
收稿时间: | 2021-01-22 |
Study on Pavement Performance and Temperature-regulating Performance of Self-temperature-regulating Asphalt Mixture |
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Abstract: | A group of dense gradation and a group of open gradation mixtures have been selected to carry out different mixing amount indoor test, to explore the influence law of self-temperature-regulating materials on the void fraction, water stability, high temperature stability, run-off and dispersion of asphalt mixture. At the same time, the temperature of asphalt mixture pavement with different grades of self-temperature-regulating materials has been observed to explore its temperature regulation range and boundary. The results show that with the increase of the content of self-temperature-adjusting material, the voidage of open-graded asphalt mixture decreases continuously and the decreasing rate increases gradually; the stability decreases first and then increases; the dynamic stability decreases gradually, and the run-off loss is basically maintained in the range of 0.5 %~0.6 %. For dense-graded asphalt mixture, the voidage and dynamic stability decrease gradually, and the influence on the stability is small. When the temperature is high in summer, the self-temperature-adjusting pavement automatically stores energy and absorbs heat, and reduces the pavement temperature of densely graded road about 4.0 ℃ and the pavement temperature of open-graded road about 2.0 ℃. While the self-temperature-adjusting road surface will automatically releases heat and increases the road temperature by about 0.4~1.0 ℃ when the temperature is low in winter. |
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