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公开(公告)号：US4650523A
公开(公告)日：1987-03-17
申请号：US735791
申请日：1985-05-17
申请人： Masatsune Kikuchi , Satoru Matsui , Hiroshi Omori , Masao Shimoda
发明人： Masatsune Kikuchi , Satoru Matsui , Hiroshi Omori , Masao Shimoda
CPC分类号： C04B28/02
摘要： Initial setting, initial adhesion and long-term stability of mortar and concrete can be improved by use of a cement accelerating agent comprising (1) calcined alunite, a carbonate and lime, (2) calcined alunite, a carbonate and an aluminate, or (3) calcined alunite, a carbonate, an aluminate and lime.
摘要翻译： 砂浆和混凝土的初始固化，初始附着力和长期稳定性可以通过使用包含（1）煅烧的铝橄榄石，碳酸盐和石灰，（2）煅烧的铝橄榄石，碳酸盐和铝酸盐或（ 3）煅烧的铝酸钠，碳酸盐，铝酸盐和石灰。
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公开(公告)号：US5160376A
公开(公告)日：1992-11-03
申请号：US598639
申请日：1990-10-15
CPC分类号： C04B40/0039 , C04B22/0093 , C04B28/02 , C04B2103/14
摘要： The present invention provides a cement setting accelerator comprising 100 parts by weight of a sintered body, 5 to 70 parts by weight of an alkali metal carbonate powder and at most 170 parts by weight of a lime powder and a method of manufacturing the same. The sintered body contains a predetermined ratio of 3CaO.2Na.sub.2 O.5Al.sub.2 O.sub.3, Na.sub.2 SO.sub.4 and Na.sub.2 O.Al.sub.2 O.sub.3. Alternatively, a predetermined ratio of 3CaO.2Na.sub.2 O.5Al.sub.2 O.sub.3, Na.sub.2 SO.sub.4 and 4CaO.3Al.sub.2 O.sub.3.SO.sub.3 are contained in the sintered body. Further, a raw material mixture, which is not sintered and equal in the chemical composition to the sintered body noted above, may be used in place of the sintered body. Setting and hardening of a cement paste is markedly promoted by adding a small amount of the cement setting accelerator of the present invention to the cement paste. Also, the initial setting time of the cement paste can be controlled by controlling the amount of addition of the cement setting accelerator of the present invention.
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