发明名称 |
Cement and process for producing same |
摘要 |
Cement is disclosed having the following composition, in percent by weight: 20 to 75% of highly basic calcium chlorosilicate, 10 to 55% of calcium chloro-orthosilicate, 0.5 to 30% of calcium chloroaluminate, 2 to 20% of calcium chloroalumoferrite; cement of the foregoing compositions is produced by calcining at a temperature within the range of from 1,000 DEG to 1,200 DEG C. a raw mixture containing a calcareous component, silicaceous component, aluminous component, ferrous component, magnesium-containing component and calcium chloride in particular proportions, and then grinding the resultant cement clinker. This cement features a reduced heat emission in the initial stage of the hydration process and possesses a high activity. No corrosion of steel reinforcement is observed in concretes produced from the present cement. The cement can be used in heavy-duty concrete structures such as hydropower dams, in the production of high-strength concretes and ferroconcrete structures. The present process involves calcination at lowered temperatures and makes it possible to obtain a cement clinker possessing a high porosity and increased grinding ability thus reducing power consumption for its grinding by 2-2.5 times.
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申请公布号 |
US4164425(A) |
申请公布日期 |
1979.08.14 |
申请号 |
US19770806510 |
申请日期 |
1977.06.14 |
申请人 |
BIKBAU, MARSEL Y;BUN, ISAAK M;KEVVAI, ARNOLD A;NUDELMAN, BORIS I;SVENTSITSKY, ALEXANDR S |
发明人 |
BIKBAU, MARSEL Y;BUN, ISAAK M;KEVVAI, ARNOLD A;NUDELMAN, BORIS I;SVENTSITSKY, ALEXANDR S |
分类号 |
C04B7/44;C04B7/345;C04B7/42;(IPC1-7):C04B7/02 |
主分类号 |
C04B7/44 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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