Processing additives for hydraulic cements
    76.
    发明授权
    Processing additives for hydraulic cements 失效
    液压水泥加工助剂

    公开(公告)号:US6048393A

    公开(公告)日:2000-04-11

    申请号:US85379

    申请日:1998-05-26

    CPC classification number: C04B40/0039 C04B24/122 C04B28/04 C04B2201/05

    Abstract: This invention relates to enhancing the compressive strength of cements after 1, 3, 7 and 28 days following hydration and to improving porosity and finished surfaces of the hardened cements and concretes made therefrom. The improved cements are prepared using certain hydroxylamine additives in amounts of up to 0.1% which preferably are added during grinding of the cement in which case the amines further act as grinding aids.

    Abstract translation: 本发明涉及提高水合后1,3,7和28天之后水泥的抗压强度,以及改善由其制成的硬化水泥和混凝土的孔隙率和最终表面。 使用某些羟胺添加剂的量可高达0.1%,优选在水泥研磨过程中加入改进的水泥,在这种情况下胺还可作为助磨剂。

    Cementitious compositions with early high strength development and
methods for controlling setting rate
    77.
    发明授权
    Cementitious compositions with early high strength development and methods for controlling setting rate 失效
    具有早期高强度发展的水泥组合物和控制凝固率的方法

    公开(公告)号:US4402749A

    公开(公告)日:1983-09-06

    申请号:US65618

    申请日:1979-08-10

    CPC classification number: C04B28/26 C04B2111/0075 C04B2111/72 C04B2201/05

    Abstract: A composition is supplied for filling pot holes and other types of structural deterioration. The composition consist of hydraulic cement and an alkali metal silicate. The silicate includes a molar ratio of silican dioxide to alkali metal oxide from 0.4 to 4.0. The silicate is in a concentration ranging from 0.2 to 20 percent by weight of the cement. A method is also provided which comprises repairing a deteriorating structure by inserting therein a cementitious composition and controlling the rate of setting of the composition by the inclusion therein of sodium silicate in the molar ratio of silicon dioxide to sodium oxide of from 0.4 to 4.0.

    Abstract translation: 提供组合物用于填充罐孔和其它类型的结构劣化。 组合物由水硬性水泥和碱金属硅酸盐组成。 硅酸盐包括硅橡胶与碱金属氧化物的摩尔比为0.4〜4.0。 硅酸盐的浓度范围为水泥重量的0.2%至20%。 还提供了一种方法,其包括通过在其中插入水泥组合物来修复劣化结构,并通过将二氧化硅与氧化钠的摩尔比为0.4至4.0,通过包含硅酸钠来控制组合物的凝固速率。

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