冻融循环作用下路面水泥混凝土耐久性试验分析  

Study on Durability of Pavement Cement Concrete Under Freeze-thaw Cycles

作　　者：张宁 ZHANG Ning(China Railway 19th Bureau Group 3rd Co.,Ltd.,Shenyang 110136,China)

机构地区：[1]中铁十九局集团第三工程有限公司,辽宁沈阳110136

出　　处：《兰州工业学院学报》2021年第5期33-37,共5页Journal of Lanzhou Institute of Technology

摘　　要：为研究东北地区的特殊气候导致水泥路面损伤劣化问题,结合辽宁某在建水泥路面项目,对不同冻融循环次数及养护龄期下水泥混凝土进行了试验分析.结果表明:随着冻融循环次数的增加,试样的质量、纵波波速均呈逐渐下降趋势;同一养护龄期下,试样的单轴抗压强度、峰值应变和弹性模量均随冻融循环次数逐渐减小,曲线逐渐趋于平缓;同一冻融循环次数下,上述3个参数均随养护龄期呈逐渐递增变化趋势,曲线逐渐趋缓;采用Origin软件对2种试验条件下的曲线进行最小二乘拟合发现,3个参数与冻融循环次数、养护龄期之间均满足指数函数关系.For the research of northeast special climate cause cement pavement damage degradation problems,combining with the Liaoning a cement road surface project under construction,different cement concrete under freeze-thaw cycles and curing age were studied.The results show that with the increase of freeze-thaw cycles,the quality of the sample and compressional wave velocity all showed a trend of gradual decline.Under the same curing age,the uniaxial compressive strength,peak strain and elastic modulus of the sample all decrease with the number of freeze-thaw cycles,and the curves gradually flatten out.Under the same number of freeze-thaw cycles,the above three parameters showed a gradually increasing trend with the curing age,and the curves gradually slowed down.Origin software was used to carry out the least square fitting of the curves under the two test conditions,and it was found that the relationship between the three parameters,the number of freeze-thaw cycles and the curing age all satisfied the exponential function.

关 键 词：路面工程 水泥混凝土 冻融循环 养护龄期 单轴压缩试验 

分 类 号：TU414[建筑科学—岩土工程]