连续配筋混凝土多指标配合比设计方法  

Mix proportion design method with multiple indexes for continuously reinforced concrete

作　　者：张洪亮[1] 陈江[1,2] 苏曼曼[1] 李宁利[1] 

机构地区：[1]长安大学特殊地区公路工程教育部重点实验室,陕西西安710064 [2]西安市政设计研究院有限公司,陕西西安710086

出　　处：《交通运输工程学报》2014年第1期11-17,共7页Journal of Traffic and Transportation Engineering

基　　金：国家自然科学基金项目(50608007);中央高校基本科研业务费专项资金项目(CHD2011ZD010;CHD2011SY003;CHD2011JC097);<公路水泥混凝土路面设计规范>(JTJ D40-2002)修订项目

摘　　要：采用MEPDG软件分析了连续配筋混凝土路面路用性能对于混凝土抗压强度、干缩应变、温缩系数等参数的敏感性。通过室内试验研究了水泥用量、水灰比等混凝土配合比组成参数对路面设计参数的影响。根据均衡设计的理论,建立了连续配筋混凝土多指标配合比设计方法,推荐了各配合比组成参数的范围,并建立了水灰比与混凝土干缩应变、温缩系数间的回归方程及弯拉强度与抗压强度间的关系式。分析结果表明:连续配筋混凝土配合比设计的控制指标宜包括抗压强度、干缩应变和温缩系数,水泥浆含量宜小于22%,最大公称粒径宜为19.0~26.5mm。根据多指标的配合比设计方法得到的混凝土能更好地满足连续配筋混凝土路面的性能要求。The sensibilities of continuously reinforced concrete pavement （CRCP） performances on concrete parameters such as compressive strength, drying shrinkage strain and temperature shrinkage coefficient were analyzed by using MEPI^J software. The influences of mix proportion parameters of cement content, water-cement ratio etc on pavement design parameters were studied through laboratory tests. According to balanced design theory, the mix proportion design method with multiple indexes for continuously reinforced concrete was set up. The appropriate scopes of mix proportion parameters were recommended, the regression formulae of water-cement ratio with drying shrinkage strain and temperature shrinkage coefficient were established, and the formula of flexural-tensile strength and compressive strength was also established. Analysis result indicates that compressive strength, drying shrinkage strain and temperature shrinkage coefficient are fitted to be control indices of mix proportion design method for continuously reinforced concrete. The mass content of cement slurry should be less than 22%. Nominal maximum aggregate size should be 19.0-26.5 mm. It is shown that the concrete designed according to the mix proportion design method with multiple indexes can better satisfy the performance requirement of CRCP. 9 tabs, 4 figs, 18 refs.

关 键 词：道路工程 连续配筋混凝土 配合比设计 参数敏感性分析 抗压强度 干缩应变 温缩系数 

分 类 号：U416.216.2[交通运输工程—道路与铁道工程]