等强混凝土界面过渡区的纳米压痕表征  

Nanoindentation Characteristics of Interfacial Transition Zones in Concrete under Equal Compressive Strength

作　　者：何智海[1] 钱春香[2] 张异[2] 赵飞[2] 

机构地区：[1]绍兴文理学院土木工程学院,浙江绍兴312000 [2]东南大学材料科学与工程学院,江苏南京211189

出　　处：《建筑材料学报》2014年第6期1082-1086,共5页Journal of Building Materials

基　　金：国家重点基础研究发展计划(973计划)项目(2009CB623200)

摘　　要：通过背散射电子图像分析结合纳米压痕技术研究了等强混凝土界面过渡区性能.结果表明:矿物掺合料不同程度改善了等强混凝土界面过渡区性能,同时也增加了其非匀质性.双掺偏高岭土和石灰石粉可减小等强混凝土界面过渡区的厚度,明显降低其弹性模量增长幅度,但提高了基体的弹性模量,而粉煤灰仅仅降低了等强混凝土界面过渡区弹性模量的增长幅度.The performances of interracial transition zones （ITZ） in concrete under equal compressive strengths were studied quantitatively by the backscattered electron image analysis and nanoindentation. The results indicate that mineral admixtures improve the performances of ITZ to the different degree, also increase the heterogeneities; a mixture of metakaolin（MK） and limestone powder（LP） can decrease the thickness of ITZ, and reduce the increase value of elastic modulus remarkably, and meanwhile it improves the elastic modulus in matrix; however, the improving function of fly ash（FA） on ITZ shows the decrease of the increase value of elastic modulus only.

关 键 词：等强混凝土 背散射电子图像分析 纳米压痕 界面过渡区 弹性模量 

分 类 号：TU528.01[建筑科学—建筑技术科学]