Cementitious gypsum-containing compositions and materials made therefrom
    2.
    发明授权
    Cementitious gypsum-containing compositions and materials made therefrom 失效
    含水泥石膏的组合物和由其制成的材料

    公开(公告)号:US5685903A

    公开(公告)日:1997-11-11

    申请号:US713727

    申请日:1996-09-13

    摘要: A cementitious composition useful for water-resistant construction materials, including floor underlayments, backing boards, self-leveling floor materials, road patching materials, fiberboard, fire-proofing sprays, and fire-stopping materials includes about 20 wt. % to about 75 wt. % calcium sulfate beta-hemihydrate, about 10 wt. % to about 50 wt. % Portland cement, about 4 wt. % to about 20 wt. % silica fume and about 1 wt. % to about 50 wt. % pozzolanic aggregate. The Portland cement component may also be a blend of Portland cement with fly ash and/or ground blast slag.

    摘要翻译: 用于防水建筑材料(包括地板底层,背板,自流平地板材料,道路修补材料,纤维板,防火喷雾剂和防火材料)的水泥组合物包括约20wt。 %至约75wt。 %硫酸钙β-半水合物,约10重量% %至约50wt。 %硅酸盐水泥,约4wt。 %至约20wt。 %硅粉和约1wt。 %至约50wt。 %火山灰聚集。 波特兰水泥组分也可以是波特兰水泥与粉煤灰和/或粉碎渣的混合物。

    Cementitious gypsum-containing compositions and materials made therefrom
    3.
    发明授权
    Cementitious gypsum-containing compositions and materials made therefrom 失效
    含水泥石膏的组合物和由其制成的材料

    公开(公告)号:US5718759A

    公开(公告)日:1998-02-17

    申请号:US731873

    申请日:1996-10-18

    摘要: A cementitious composition useful for water-resistant construction materials, including floor underlayments, backing boards, self-leveling floor materials, road patching materials, fiberboard, fire-proofing sprays, and fire-stopping materials includes about 20 wt. % to about 75 wt. % calcium sulfate beta-hemihydrate, about 10 wt. % to about 50 wt. % Portland cement, about 4 wt. % to about 20 wt. % silica fume and about 1 wt. % to about 50 wt. % pozzolanic aggregate. The Portland cement component may also be a blend of Portland cement with fly ash and/or ground blast slag.

    摘要翻译: 用于防水建筑材料(包括地板底层,背板,自流平地板材料,道路修补材料,纤维板,防火喷雾剂和防火材料)的水泥组合物包括约20wt。 %至约75wt。 %硫酸钙β-半水合物,约10重量% %至约50wt。 %硅酸盐水泥,约4wt。 %至约20wt。 %硅粉和约1wt。 %至约50wt。 %火山灰聚集。 波特兰水泥组分也可以是波特兰水泥与粉煤灰和/或粉碎渣的混合物。

    Gypsum-rich Portland cement
    5.
    发明授权
    Gypsum-rich Portland cement 失效
    富含石膏的波特兰水泥

    公开(公告)号:US06197107B1

    公开(公告)日:2001-03-06

    申请号:US09538217

    申请日:2000-03-30

    IPC分类号: C04B1130

    摘要: The present invention is of a cementitious composition containing OPC, calcined gypsum, a source of amorphous silica and a source of amorphous alumina. The ratio of calcium sulfate hemihydrate to OPC is 0.7:1.0 to 1.4:1.0, the ratio of amorphous silica and amorphous alumina to OPC is 0.26:1.0 to 0.4:1.0, and the ratio of amorphous alumina to amorphous silica is 0.3:1.0 to 1.5:1.0. The cementitious composition, by itself and mixed with aggregates, is fast-setting and exhibits good early compressive strength and very high compressive strength after hydration. Despite the high content of calcium sulfate relative to prior art OPC formulations, the cementitious composition according to the present invention is essentially waterproof and exhibits excellent strength characteristics, even after 2 years under water. The use of calcined gypsum in place of alumina cement or even OPC is of great economic advantage, and in addition, provides the cementitious composition with quick-setting characteristics.

    摘要翻译: 本发明是含有OPC,煅烧石膏,无定形二氧化硅源和无定形氧化铝源的水泥组合物。 硫酸钙半水合物与OPC的比例为0.7:1.0至1.4:1.0,无定形二氧化硅和无定形氧化铝与OPC的比例为0.26:1.0至0.4:1.0,无定形氧化铝与无定形二氧化硅的比例为0.3:1.0至 1.5:1.0。 水泥组合物本身并且与聚集体混合,是快速凝固的,并且在水合后表现出良好的早期抗压强度和非常高的抗压强度。 尽管相对于现有技术的OPC制剂,硫酸钙的含量高,但是根据本发明的水泥组合物基本上是防水的,并且即使在水下2年后也显示出优异的强度特性。 使用煅烧石膏代替氧化铝水泥甚至OPC具有很大的经济优势,另外为水泥组合物提供快速凝固特性。