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生产预制混凝土花格,一般采用浇筑成型和振动成型两种方法。浇筑成型是将塑性混凝土或低流动性混凝土浇筑在模具中,再用人工插捣的方法成型;振动成型法是指用干硬性、半干硬性混凝土拌合物,采用工具式模具,利用振动台振动成型的方法。图2为近年北京市常用的几种混凝土花格。一、原科与配比混凝土花格用的原材料为小八厘石渣、水泥和水。市场供应的白水泥,白色度为80度,标号为325号,细度、安定性、烧失量等无特殊要求。用白色小八厘石渣,容重为1400
The production of precast concrete grate is generally performed by two methods of casting and vibration forming. Casting molding is to cast plastic concrete or low-flow concrete in the mold, and then artificially insert molding method; vibration molding method refers to the use of dry hard, semi-rigid concrete mixture, tool mold, using vibration table Vibration molding method. Figure 2 shows several types of concrete grate used in Beijing in recent years. 1. The raw materials used in the original and matching concrete lattices are small bales, cement and water. The white cement supplied by the market has a white degree of 80 degrees and a number of 325. No special requirements are required for fineness, stability, and loss on ignition. With a small white balsam residue, the bulk density is 1400