偏高岭土对天然轻骨料混凝土抗冻性能及微观影响的研究  

Natural lightweight aggregate concrete mixed with metakaolin to study on frost resistance performance and microeconomic impact

作　　者：秦淑芳[1] 申向东[1] 

机构地区：[1]内蒙古农业大学水利与土木建筑工程学院,内蒙古呼和浩特010018

出　　处：《混凝土》2014年第1期72-75,共4页Concrete

基　　金：高等学校博士学科点专项科研基金(20121515110002);内蒙古自治区自然科学基金项目(2009MS705;2011BS0705)

摘　　要：通过对轻骨料混凝土内掺0、10%、15%、20%偏高岭土研究轻骨料混凝土的抗冻性能。分别设定25,50,75,100,125,150,200次的冻融循环,每次冻融循环结束后,测定其质量损失和动弹模量。通过对试验组和基准组的数据对比分析,发现掺加偏高岭土能够很大程度的提高轻骨料混凝土的抗冻性,并确定了偏高岭土的最优掺量为胶凝材料的15%。另外通过对轻骨料混凝土冻融试件的电镜扫描的微观分析,找到了偏高岭土对轻骨料混凝土的抗冻性能提高的微观原因。To study the frost resistance of the lightweight aggregate concrete by mixing with 0,10%, 15%, 20% metakaolin.After the test blocks were freeze-thaw cycles for 25,50,75,100,125,150,200 times,then measured mass loss and dynamic elastic modulus.Analysising the data of experimental group and a reference group, the frost resistance of lightweight aggregate concrete could be largely improved by the metakaolin, and its optimal content was 15 percent of cementitious materials.Moreover, from the picture of scanning electron micro- scope we could find that microeconomic reasons for it.

关 键 词：轻骨料混凝土 偏高岭土 抗冻性能 微观分析 

分 类 号：TU528.041[建筑科学—建筑技术科学]