Influence of Hydrothermal Curing on Micro Structure and Mechanical Properties of Ultra-High Performance Concrete
Influence of Hydrothermal Curing on Micro Structure and Mechanical Properties of Ultra-High Performance Concrete
复制标题
水热养护对超高性能混凝土微观结构和力学性能的影响
DOI：
--
复制
发表时间：
2010
期刊：
影响因子：
--
通讯作者：
U. Müller
中科院分区：
文献类型：
--
作者：
P. Fontana;C. Lehmann;U. Müller
超高性能混凝土（UHPC）的热固化对其力学性能有显着影响。当额外施加水蒸气饱和压力（高压灭菌）时，固化条件会大大增强，从而改善水泥和二次胶凝材料的水合作用。高压灭菌的 UHPC 呈现出紧密网络化的 C-S-H 晶体纤维的水泥浆基体。缺陷充满结晶反应产物，产生更均匀的微观结构。因此，UHPC 的机械性能显着提高。石英填料颗粒的部分反应可能有助于提高与水泥浆的内聚力。
Thermal curing of Ultra-High Performance Concrete (UHPC) has a significant influence on its mechanical properties. When additionally a water vapour saturation pressure is applied (autoclaving), the curing conditions are strongly enhanced, leading to an improved hydration of cement and secondary cementitious materials. Autoclaved UHPC exhibits a cement paste matrix of close networked C-S-H crystal fibres. Flaws are filled with crystalline reaction products generating a more homogenous micro structure. As a consequence, the mechanical properties of UHPC are improved significantly. The partial reaction of quartz filler grains may contribute by improving the cohesion with the cement paste.