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我厂自1962年以来,在冬季生产了一种抗冻瓦坯。具体作法如下:将固体氯化钠溶于水中,配制浓度33.65%的含盐溶液(即每100kg 溶液中合盐33.65kg),在粘土中加入这种溶液5～7%,即使在摄氏零下7度仍不冻结。掺入粘土中的食盐溶液愈浓,瓦坯的抗冻性愈好,冻结的温度愈低。食盐溶液浓度可根据所要求的抗冻性来决定(参看附表)。一般粘土中含水分18～20%,瓦坯成型水分控制在25%,故可再掺入5～7%食盐溶液。掺有食盐溶
Since 1962, our factory has produced a kind of frost-resistant blanks in winter. Specific practices are as follows: Dissolve solid sodium chloride in water, prepare a salt solution with a concentration of 33.65% (ie, 33.65 kg of salt per 100 kg of solution). Add this solution to the clay at 5 to 7%, even at minus 7 Celsius. The degree still does not freeze. The more concentrated the salt solution incorporated into the clay, the better the frost resistance of the slab and the lower the freezing temperature. The concentration of salt solution can be determined according to the required frost resistance (see attached table). Generally, the clay contains 18 to 20% moisture, and the moisture content of the slab is controlled at 25%. Therefore, 5 to 7% salt solution can be added. Doped with salt