Effects of microstructure on restrained autogenous shrinkage behavior in high strength concretes at early ages
作者： S. Igarashi , M. Kawamura
DOI: 10.1007/BF02482105
关键词:
摘要: Fluorescence microscopic examinations were conducted to identify damages induced by restraining autogenous shrinkage. Characteristics of fluorescent areas and their correspondence autogeneous shrinkage behavior high strength concretes discussed. Silica fume concrete exhibited a greater creep potential when loaded at very early ages. The microstructure in sealed with an extremely low water/binder ratio was porous. vicinity aggregate grains more porous weaker than the bulk matrix concretes. In addition, silica contained many unhydrated cement particles which profiled thin gaps between core surrounding paste matrix. These features not observed water ponded detected may be defects caused selfdesiccation flaws had little effects on development strength. However, presence around remnant increase deformation relieve internal stresses.
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