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沥青混合料中温车辙试验研究

, PP. 38-42

Keywords: 道路工程,中温车辙,室内车辙试验,沥青混合料,重载,低速

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Abstract:

利用改进的能够调整轮碾速度的车辙试验机,对AC20开展了30、45℃和60℃时不同轮压及轮碾速度下的车辙试验。试验结果表明,在45℃试验温度下,重载和低速的联合影响很容易使AC20的车辙指标值劣于60℃、标准轮压和标准轮碾速度条件下的结果;而在30℃试验温度下,即使有重载和低速的联合影响,AC20的车辙指标值仍然好于60℃、标准轮压和标准轮碾速度条件下的结果。分析结果说明寒冷地区沥青路面车辙的产生除因为沥青混合料高温稳定性不足外,还需要考虑中温时间段内重载和低速引起的变形。根据分析结果,建议寒冷地区沥青混合料车辙试验方法除需要将试验温度调整为45℃以外,同时还需要根据道路交通状况设定重载低速的试验条件。

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