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1. 发明授权

US4002483A Expansive cement 失效
标题翻译：膨胀水泥
公开(公告)号：US4002483A
公开(公告)日：1977-01-11
申请号：US586225
申请日：1975-06-12
申请人： Kenneth E. Daugherty , John P. Luker , Joseph H. Allen , Waldemar A. Klemm
发明人： Kenneth E. Daugherty , John P. Luker , Joseph H. Allen , Waldemar A. Klemm
IPC分类号： C04B7/00 , C04B7/02 , C04B7/345 , F42D99/00
CPC分类号： C04B7/02
摘要： An improved expansive cement composition is provided which has the increased capability of being able to " grab" steel reinforcement members therewithin as the material is curing and expanding to result in effective stressing of the reinforcement members. This cement is made of particulate argillaceous and calcareous materials, and contains from about 1 to about 70% by weight of free CaO and from about 2 to about 7% by weight of MgO uniformly distributed therein, with the remaining portion being primarily tricalcium silicate and containing substantially no dicalcium silicate. The improved expansive composition can be manufactured by subjecting a conventional Portland cement raw mix, which has been "overlimed" and which contains the added quantity of MgO, to hard burning conditions within a Portland cement kiln such that the silicate materials are reacted with lime to form tricalcium silicate but yet leave from about 1 to about 70% by weight of the free CaO, and from about 2 to about 7% by weight of the MgO in the clinker, and thereafter comminuting the clinker. The composition can be used directly as an expansive cement, or can be mixed with other cements such as Portland cements to impart expansive qualities thereto.
摘要翻译：提供了一种改进的膨胀水泥组合物，其具有能够在其中固化和膨胀以“加固”钢筋构件以增强加强构件的有效应力的能力。该水泥由颗粒状泥质和钙质材料制成，并且含有约1至约70重量％的游离CaO和约2至约7重量％的均匀分布在其中的MgO，其余部分主要为硅酸三钙，基本上不含硅酸二钙。改进的膨胀组合物可以通过将已经“叠加”并且含有添加量的MgO的常规波特兰水泥原料混合物在波特兰水泥窑内的硬化条件下进行制造，使得硅酸盐材料与石灰反应形成硅酸三钙，但仍然留下约1至约70重量％的游离CaO和约2至约7重量％的熟料中的MgO，然后粉碎熟料。该组合物可以直接用作膨胀水泥，或者可以与其它水泥如波特兰水泥混合，以赋予其膨胀性质。

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