用动态模量成像与纳米压痕技术对硬化水泥浆体中水化产物的识别和表征  

Identification and Characterization of Hydration Products in Hardened Cement Paste Based on Modulus Mapping and Nanoindentation

作　　者：魏亚[1] 高翔[1] 梁思明[1] WEI Ya;GAO Xiang;LIANG Siming(Key Laboratory of Civil Engineering Safety and Durability of China Education Ministry,Department of Civil Engineering,Tsinghua University,Beijing 100084,China)

机构地区：[1]清华大学土木工程系土木工程安全与耐久教育部重点实验室

出　　处：《硅酸盐学报》2018年第8期1043-1052,共10页Journal of The Chinese Ceramic Society

基　　金：国家自然科学基金项目(51578316,51778331)

摘　　要：采用基于扫描探针显微镜的动态模量成像技术和原位纳米压痕技术,对普通硅酸盐水泥净浆和掺矿渣水泥净浆进行测试,识别硬化水泥浆体中的不同水化产物,并在无损情况下表征其微观结构特征与力学性能。借助于模量成像高精度的优势,定量表征了内部水化产物层的厚度。结果表明：同类型水化产物的模量不受掺入矿渣与否的影响;对于单一物相而言,同样反应弹性力学性质的储能模量和压痕模量基本相等。To identify different types of hydration products in cement pastes, the combined methods of quantitative modulus mapping in the form of scanning probe microscopy and in-situ nanoindentation were used, which were conducted on the paste samples of the ordinary Portland cement and the slag-blended cement. The microstructure features and micro-mechanical properties of cement pastes were evaluated. The thickness of the inner hydration product was precisely measured by means of high-resolution of modulus mapping. The measurements indicate that the mechanical properties of outer hydration product and inner product both are not affected by the blended slag. In addition, the results also show a correlation between the storage modulus and the indentation modulus of the individual phases.

关 键 词：模量成像 原位纳米压痕 储能模量 压痕模量 水化产物层厚度 硬化水泥浆体 

分 类 号：TB321[一般工业技术—材料科学与工程]