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    • 3. 发明授权
    • Method and spraying apparatus for applying a layer of air-sprayed
concrete
    • 喷涂混凝土层的方法和喷涂装置
    • US4993884A
    • 1991-02-19
    • US478752
    • 1990-02-12
    • Karl-Hans MuellerWalter Barthel
    • Karl-Hans MuellerWalter Barthel
    • B28C7/04B05B7/14B28C7/06C04B14/06E04G21/02E04G21/04
    • C04B14/062E04G21/04C04B2111/00146C04B2111/00482
    • Method of applying a layer of air-sprayed concrete onto a surface, wherein a pumpable and sprayable mixture of air-sprayable concrete is prepared from cement, aggregates, optional additives, and water. A given mass flow of the mixture of air-spray concrete is sprayed by means of a concrete feed pump through a concrete feed line to a spraying apparatus with a device for the introduction of propelling air under a feed pressure of several bars. The propelling air is charged with synthetic silica exhibiting a BET surface of at least 25 m.sup.2 /g. The synthetic silica is added with the propelling air into the mass flow of the mixture of air-spray concrete in such an amount that the applied air-spray concrete experiences a spontaneous temperature elevation of a few degrees Kelvin immediately after application. A spraying apparatus for the method is also shown.
    • 将一层喷涂混凝土施加到表面上的方法,其中由水泥,骨料,任选的添加剂和水制备可喷射和可喷雾混合的可喷雾混凝土。 空气喷射混凝土混合物的给定质量流量通过混凝土进料泵通过混凝土进料管线喷射到具有用于在几巴的进料压力下引入推进空气的装置的喷射装置。 向推进空气中加入表现出至少25m 2 / g的BET表面的合成二氧化硅。 将合成二氧化硅加入空气喷射混合物混合物的质量流中的推进空气,使得施用的空气喷涂混凝土在施用后立即经历几度开尔文的自发升温。 还示出了该方法的喷射装置。