冻融-盐腐蚀耦合作用下OGFC水稳定性研究  

Research on the Water Stability of OGFC under the Coupled Effect of Freeze-Thaw and Salt Corrosion

作　　者：于保阳[1,2] 章林 王浩 YU Bao-yang;ZHANG Lin;WANG Hao(School of Transportation and Geomatics Engineering,Shenyang Jianzhu University,Shenyang 110168,China;School of Transportation Engineering,Dalian Maritime University,Dalian 116026,China;General Construction Company of CCTEB Group Co.Ltd.,Wuhan 430070,China)

机构地区：[1]沈阳建筑大学交通与测绘工程学院,沈阳市110168 [2]大连海事大学交通工程学院,大连市116026 [3]中建三局集团有限公司工程总承包公司,武汉市430070

出　　处：《公路》2024年第12期72-78,共7页Highway

基　　金：辽宁省教育厅重点攻关项目,项目编号JYTZD2023170;大学生创新创业训练计划项目,项目编号202310153002。

摘　　要：为研究北方季冻区透水沥青路面因使用融雪盐而产生的冻融盐腐蚀问题,对OGFC沥青混合料进行冻融和盐腐蚀耦合作用下的宏观与仿真劈裂试验。对盐冻循环后的沥青砂浆进行单轴压缩和蠕变试验,建立含有损伤因子的Burgers损伤模型。利用工业CT断层扫描技术,构建OGFC沥青混合料细观结构的不均质特征三维模型,进行仿真劈裂试验,并将试验结果与宏观劈裂试验结果进行对比分析。结果表明:盐冻循环对OGFC沥青混合料的水稳定性产生不利影响,混合料的空隙与集料的交界处易产生应力集中现象,整体承载能力降低;宏观劈裂试验结果与仿真劈裂试验结果的误差在20%左右,但劈裂强度比变化趋势基本一致。In order to study the freeze-thaw salt corrosion problem of permeable asphalt pavement in the northern seasonal region caused by the use of snowmelt salt,the macroscopic and simulated splitting tests on OGFC asphalt mixture are carried out under the coupling effect of freeze-thaw and salt corrosion.Uniaxial compression and creep tests are conducted on asphalt mortar after salt freezing cycles,and a Burgers damage model containing damage factors is established.By using industrial CT tomography technology,a three-dimensional model of heterogeneity characteristics at the micro level of OGFC asphalt mixture is established,and simulation splitting tests are conducted.The test results are compared and analyzed with macroscopic splitting test results.The results indicate that the salt freezing cycle has an adverse effect on the water stability of OGFC asphalt mixture,and the interface between the voids and aggregates of the mixture is prone to stress concentration,resulting in a decrease in overall bearing capacity.The error between the macroscopic and simulated splitting test results is about 20%,but the trend of splitting strength change is basically consistent.

关 键 词：OGFC 冻融-盐腐蚀 水稳定性 仿真冻融劈裂 CT断层扫描 

分 类 号：U416.217[交通运输工程—道路与铁道工程] TU528.42[建筑科学—建筑技术科学]