水泥混凝土路面早龄期温度场性状与控制方法  

Characteristic and control method of early-age temperature field for cement concrete pavement

作　　者：胡昌斌[1] 孙增华[1] 王丽娟[1] 

机构地区：[1]福州大学土木工程学院,福建福州350108

出　　处：《交通运输工程学报》2013年第5期1-9,共9页Journal of Traffic and Transportation Engineering

基　　金：国家自然科学基金项目(50908056)

摘　　要：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。The control principles of early-age temperature field were put forward based on the temperature stress, built-in basic temperature, built-in temperature difference and curing temperature of cement concrete pavement. The specialized early-age temperature field numerical simulation program of cement concrete pavement was used, the sensitivities and influencing characteristics of pavement early-age temperature field parameters were researched, and the effectivenesses of pavement early-age temperature field control measures were evaluated. Analysis result shows that compared with material parameters, environment construction parameters are major factors effecting pavement early-age temperature characteristics. Appropriate paving time and environment condition may change the temperature difference between the top and the bottom of slab more than 20 ~C. Proper curing methods and curing materials may reduce the temperature of pavement more than 12 ~C. Concrete paving temperature, water cement ratio and cement content significantly effect built-in basic temperature. For specific temperature control target, the sensitivities of influencing parameters are not the same, field pavement early-age temperature simulation should be combined to balance the effects of control measures. 5 tabs, 18 figs, 15 refs.

关 键 词：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 

分 类 号：U416.216[交通运输工程—道路与铁道工程]