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混凝土施工的成型方法,目前主要以振动成型的应用最为普遍,但所产生的噪音十分有害。在混凝土成型后,用真空吸盘将混凝土拌合时多余的水吸出来,这就保证了水灰比大的混凝土的强度不致低于同水泥用量的干硬性混凝土的强度,达到节约水泥和改善劳动条件的目的。在国内,50年代初曾使用过,近年来造船行业用真空吸水技术来成型钢丝网水泥船,取得了显著成效。含水量较大的塑性混凝土成型,拌合物处于常压状态。当把一个一侧能透水及另一侧周边密闭的真空吸盘紧紧地贴在已成型的混凝土表面上,开动真空泵使吸盘空腔形成一定
Forming method of concrete construction, the main application of vibration molding is the most common, but the noise generated is very harmful. After the concrete is formed, vacuum sucker to mix the concrete when the excess water sucked out, which ensures that the strength of the concrete with a high water-cement ratio will not be less than the amount of dry concrete with the strength of concrete, to save the cement and improve labor The purpose of the conditions. In China, it was used in the early 1950s. In recent years, the shipbuilding industry has made remarkable achievements by using vacuum suction technology to form steel mesh cement vessels. Plastic concrete with larger water content, the mixture at atmospheric pressure. When one side of the water can be permeable and the other side of the closed vacuum suction cup tightly attached to the surface of the concrete has been formed, start the vacuum pump cavity to form a certain sucker