气固两相流条件下混凝土受冲蚀磨损性能及碳化深度研究  

Research on erosion property of concrete and carbonation depth under cas-solid two-phase flow

作　　者：郝贠洪[1] 刘永利[1] 樊金承 江南[1] 韩燕[1] 

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

出　　处：《混凝土》2016年第6期27-30,共4页Concrete

基　　金：国家自然科学基金资助项目(11162011;51468049);内蒙古自然科学基金资助项目(2009MS0706)

摘　　要：通过混凝土在风沙环境下的冲蚀磨损试验研究,分析和探讨了混凝土在气固两相流条件下的冲蚀磨损性能及其对碳化深度的影响。试验结果表明:风沙流冲蚀速度是影响混凝土材料冲蚀磨损的主要因素,混凝土材料的冲蚀率随着风沙流冲蚀速度的增加而增大。混凝土在受风沙冲蚀磨损过程中没有明显的孕育期,但随着冲蚀时间的延长有上升期和稳定期。风沙环境下的混凝土碳化深度大于无风沙作用下的混凝土碳化深度;混凝土背风面碳化深度小于迎风面;随着混凝土强度的提高,其密实度增加,渗透性减小,风沙引起气体在混凝土内部的渗透作用减弱,碳化深度减小。The experimental study of concrete erosion in the sand Environment is to discuss the concrete erosion features and carbonation depth.The results show that the main factors that influence the concrete material erosion wear is sand erosion velocity.The erosion rate of concrete material increased along with the improvement of sand erosion speed.The experiment shows that there is no obvious incubation period during the erosion process.but the rise and stable periods appears as the extension of erosion time.Concrete carbonation depth under the environment of sand is greater than that of without sand.The carbonation depth on the leeward side of concrete is less than the wind- ward side.With the improvement of concrete strength, its density increases, the permeability coefficient decreases, at the same time the pen- etration effect of interior concrete caused by sand is reduced and carbonation depth is decreased.

关 键 词：风沙环境 混凝土 冲蚀磨损 碳化深度 

分 类 号：TU528.01[建筑科学—建筑技术科学]