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水泥混凝土路面早龄期温度场性状与控制方法

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Keywords: 道路工程,水泥混凝土路面,早龄期,温度场性状,施工控制,固化温度

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Abstract:

提出了基于水泥混凝土路面温度应力、固化基础温度、固化温度差和养生温度的早龄期温度场控制原则,采用专用水泥混凝土路面早龄期温度场数值模拟程序,进行了路面早龄期温度场参数的敏感性和影响特性分析,评估了路面早龄期温度场控制措施的有效性。分析结果表明与材料参数相比,环境施工参数是影响路面早龄期温度特征的主要因素;选择合适的铺筑时刻、环境条件可使板顶板底温度差改变达20℃;采用恰当的养护方式和养护材料可降低路面板温度12℃以上;混凝土摊铺温度、水灰比和水泥用量对固化基础温度影响显著;对于特定温度控制指标,各影响参数敏感性并不相同,需结合现场路面板早龄期温度仿真平衡措施影响。

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