Indexed by:会议论文
Date of Publication:2010-10-17
Included Journals:EI、Scopus
Volume:225
Page Number:173-181
Abstract:As a kind of microfiber, CaCO3 whisker can improve the properties of cement efficiently. However, the weak interfacial bond and dispersity of whiskers in cement matrix severely restrained the further improvement of properties. Nanometer silica was introduced to modify and achieve interfacial optimization between whiskers and cement matrix to ensure the reinforcement of whiskers be given full play. Crystal structures, microcosmic appearances and characterizations of nano-silica, CaCO3 whisker and the composite were studied by X-ray diffraction (XRD), scan electron microscope (SEM/EDS), and transmission electron microscope(TEM), respectively. Effect of different silica content on the microstructure, interface and mechanical properties of whisker-reinforced cement was investigated. The results show that the incorporation of nano-silica resulted in an increase in interfacial properties between whisker and cement matrix, the mechanical properties of composites and microstructure of the matrix were all improved. Furthermore, mechanisms of whsiker-cement's interface optimized by nano-silica was also discussed.