| 引用本文: | 郝贠洪,樊金承,邢永明,江南,郭健,刘艳晨,冯玉江.田口方法下混凝土受盐冻循环和风沙侵蚀研究[J].建筑材料学报,2017,20(1):124-129 |
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| 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%. |
| 关键词: 混凝土 盐冻循环 风沙冲蚀 田口方法 |
| DOI：103969/j.issn1007 9629201701022 |
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| 基金项目: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 |
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| Study of Concrete under Salt Freeze Thaw Cycles and Wind Blown Sand Erosion by Using Taguchi Method |
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HAO Yunhong1, FAN Jincheng1, XING Yongming2, JIANG Nan1, GUO Jian1, LIU Yanchen1, FENG Yujiang1
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1.School of Civil Engineering, Inner Mongolia University of Technology, Hohhot 010051, China;2.School of Science, Inner Mongolia University of Technology, Hohhot 010051, China
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| Abstract: |
| On the basis of salt freeze thaw cycles, the erosion simulation system of wind blown sand environment was utilized to study the concrete erosion. The number of salt freeze thaw cycles（0, 5, 10, 25, 35, 45 times）, the erosion velocity（35,40,45m/s）, the impact angle（15°,54°,90°） and abrasive feed rate（60,110,160g/min） were chosen for the study. An L18（61×33） Taguchi orthogonal array was adopted to design the experiment and reduce the number of full factorial experiment. With scanning electron microscopy（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 45m/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. |
| Key words: concrete salt freeze thaw cycle wind blown sand erosion Taguchi method |
