Process for spraying concrete or mortar
    1.
    发明授权
    Process for spraying concrete or mortar 失效
    喷涂混凝土或砂浆的工艺

    公开(公告)号:US5895688A

    公开(公告)日:1999-04-20

    申请号:US626346

    申请日:1996-04-02

    摘要: A process for spraying concrete or mortar, by a dry route or by a wet route, in order to produce on a surface a layer of concrete or of mortar. Just before or at the time of spraying, an aqueous suspension (A) of silica and of an aluminum compound chosen from aluminum sulphate, basic aluminum sulphates, alums and mixtures thereof is added to the concrete or mortar. The aqueous suspension (A) has a pH lower than 4, a solids content of between 10 and 50% by weight, and, after a period at rest of 48 hours, is in the form of a gel which is reversible under low shear. The aqueous suspension (A) is effective for increasing the thickness of the sprayed layer and reducing rebound of the concrete or mortar sprayed onto the surface.

    摘要翻译: 通过干路线或湿路线喷涂混凝土或砂浆的方法,以便在表面上生产一层混凝土或砂浆。 在喷雾之前或喷雾时,将混合物或砂浆中加入二氧化硅和选自硫酸铝,碱式硫酸铝,明矾及其混合物的铝化合物的水性悬浮液(A)。 水性悬浮液(A)的pH低于4,固体含量为10至50重量%,并且在48小时静置的时间之后为凝胶形式,其在低剪切下是可逆的。 水性悬浮液(A)对于增加喷涂层的厚度并减少喷涂到表面上的混凝土或砂浆的回弹是有效的。