田口方法下混凝土受盐冻循环和风沙侵蚀研究  

Study of Concrete under Salt Freeze-Thaw Cycles and Wind-Blown Sand Erosion by Using Taguchi Method

作　　者：郝贠洪[1,2] 樊金承 邢永明[3] 江南[1] 郭健[1] 刘艳晨[1] 冯玉江[1] HAO Yunhong FAN J incheng XING Yongrning J IANG Nan GUO Jian LIU Yanchen FENG YujiangI(School of Civil Engineering, Inner Mongolia University of Technology, Hohhot 010051, China Inner Mongolia Key Laboratory of Civil Engineering Structures and Mechanics, Inner Mongolia University of Technology, Hohhot 010051, China School of Science, Inner Mongolia University of Technology, Hohhot 010051, China)

机构地区：[1]内蒙古工业大学土木工程学院,内蒙古呼和浩特010051 [2]内蒙古工业大学内蒙古自治区土木工程结构与力学重点实验室,内蒙古呼和浩特010051 [3]内蒙古工业大学理学院,内蒙古呼和浩特010051

出　　处：《建筑材料学报》2017年第1期124-129,共6页Journal of Building Materials

基　　金：国家自然科学基金资助项目(51468049;11162011;11662012);内蒙古自治区人才开发基金项目

摘　　要：在盐冻循环基础上,利用模拟风沙环境侵蚀试验系统对混凝土进行了冲蚀试验研究.试验因子选取盐冻循环次数(0,5,10,25,35,45次),冲蚀速度(35,40,45m/s),冲蚀角度(15°,54°,90°)和沙流量(60,110,160g/min),并采用L18(61×33)田口方法设计试验,以减少全因子下的试验数量;同时应用扫描电镜观测混凝土受盐冻循环后的微观形貌,分析产生最大冲蚀率的原因及冲蚀机理.试验结果表明,当盐冻循环25次,冲蚀速度45m/s,冲蚀角度90°和沙流量60g/min时,混凝土冲蚀率最大;方差分析(ANOVA)结果表明,冲蚀角度对混凝土冲蚀磨损影响最大,其贡献率为72.48%.On the basis of salt freeze-thaw cycles, the erosion simulation system of wind-blown sand envi- ronment was utilized to study the concrete erosion. The number of salt freeze-thaw cycles（0, 5, 10, 25, 35, 45 times）, the erosion velocity（35,40,45 m/s）, the impact angle（ 15°, 54°, 90°） and abrasive feed rate （60,110,160 g/min） were chosen for the study. An L18 （6^1 × 3^3） Taguchi orthogonal array was adopted to design the experiment and reduce the number of full factorial experiment. With scanning electron micros- copy（SEM） micrograph of concrete after salt freeze-thaw cycles, the reason of the maximum erosion ratio and erosion mechanism were analyzed. The results show that the maximum concrete erosion ratio is obtained under the condition of 25 times of salt freeze-thaw cycles, erosion velocity of 45 m/s, impact angle of 90° and abrasive feed rate of 60 g/min. The impact angle has a significant effect on concrete erosion damage by using the analysis of variance（ANOVA） method and it has 72.48% contribution rate.

关 键 词：混凝土 盐冻循环 风沙冲蚀 田口方法 

分 类 号：TU528.33[建筑科学—建筑技术科学]