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    • 10. 发明授权
    • Drying the surface of a fresh concrete body
    • 干燥新鲜混凝土的表面
    • US5104594A
    • 1992-04-14
    • US467610
    • 1990-01-19
    • Bernd HillemeierClaus FlohrerAndreas Schaab
    • Bernd HillemeierClaus FlohrerAndreas Schaab
    • E04B1/70
    • E04B1/70Y10S264/43Y10S264/46Y10S34/01
    • A surface of a fresh concrete body is dried by first covering the surface to be dried with a layer of bibulous granules having a great internal surface area for a time sufficient to draw generally all of the water out of the body via the surface and then preventing water from entering the layer from its side turned away from the body. The granules are finely divided hygroscopic particles, with an internal surface area of at least 200 m.sup.2 /g, preferably at least 800 m.sup.2 /g. The hydrophilic particles take up the moisture from the concrete and hold it in the layer of particles lying on the surface. This reduces the partial vapor pressure on the surface of the concrete body which effectively draws further liquid out of the concrete. The particles are a mixture of a cross-linked polymer that only swells in water and silica. The particles are carried in a coherent mat and are applied as a layer to the surface by laying the mat thereon. This mat has a moisture-pervious face and a moisture-impervious face so that water is prevented from entering the layer from the side turned away from the body by orienting the moisture-impervious face away from the body. The moisture-impervious face is formed by a synthetic-resin sheet.
    • 将新鲜混凝土体的表面首先用具有大的内表面积的吸水颗粒层覆盖待干燥表面,时间足以将所有的水通过表面全部吸出体外,然后防止 水从其侧面进入层离开身体。 颗粒是细分散的吸湿颗粒,其内表面积至少为200m 2 / g,优选至少为800m 2 / g。 亲水性颗粒从混凝土中吸收水分并将其保持在位于表面上的颗粒层中。 这降低了混凝土体表面的部分蒸汽压力,这有效地将更多的液体从混凝土中吸出。 颗粒是仅在水和二氧化硅中溶胀的交联聚合物的混合物。 颗粒被携带在粘结垫中,并通过将垫铺在其上而作为层施加到表面。 这种垫子具有透湿的面和不透湿的面,以便通过使不透湿的面远离身体来防止水从离开身体的一侧进入层中。 防潮面由合成树脂片形成。