Method of making dried gypsum articles having improved strength to density ratio专利检索- 硫酸钙水泥专利检索查询-专利查询网

Method of making dried gypsum articles having improved strength to density ratio
申请号	US3666581D	申请日	1969-04-01	公开(公告)号	US3666581A	公开(公告)日	1972-05-30
申请人	UNITED STATES GYPSUM CO;			发明人	LANE MARVIN K;
摘要	THE PROCESS OF MAKING DRIED GYPSUM ARTICLES HAVING AN INCREASED STRENGTH TO DENSITY RATIO AND WHICH CAN BE CAST FROM AN AQUEOUS SLURRY OF CALCINED GYPSUM THAT CONTAINS LESS WATER FOR THE SAME FLUIDITY, BY PROVIDING A SPECIALLY SIZED CALCINED GYPSUM WHICH CONTAINS 0% TO 7% BY WEIGHT OF PARTICLES LARGER THAN 32 MICRONS AND 0% TO 8% BY WEIGHT OF PARTICLES SMALLER THAN 1 MICRON, FORMING A SLURRY AT USABLE FLUIDITY AFTER MIXING VIGOROUSLY WITH ACCELERATOR AND CASTING WHILE THE SIZED CALCINED GYPSUM HAS A COMBINED MOISTURE CONTENT OF LESS THAN 9% BY WEIGHT.
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