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自从1985年第3期《中国建材》杂志发表《如何提高石膏制品的防水性》一文后,笔者陆续收到二、三十家来信,提出很多问题,现归纳如下作为回答,愿共同探讨。一、关于石膏板质量不好一拿就碎的问量石膏制品的第一个关键是炒制的温度和时间的掌握。将石膏从二水石膏炒制成半水石膏,这是一个技术问题,需要经验和设备的改进。北京窦店制造的炒锅,经过几家石膏厂的使用,很难掌握好炒制的温度和时间。我认为必须将设备作一下改动,并且要加上温度表,以便用科学的办法加以解决。第二个关键是石膏板的配方问题,以及操作人员在制作过程中是否合理。在国内一般生产石膏装饰板都是用
Since the third issue of “China Building Materials” magazine published “How to improve the waterproofness of gypsum products” in 1985, the author has received 20 or 30 letters in succession, and raised a number of questions. Now it is summarized as an answer and I would like to discuss it together. First, on the gypsum board quality is not good to take on the broken number of gypsum products, the first key is to fry the temperature and time to master. Frying gypsum from dihydrate gypsum into hemihydrate gypsum is a technical problem that requires experience and equipment improvements. The use of several gypsum plants in the frying pans manufactured by Beijing Doudian makes it difficult to master the frying temperature and time. I think it is necessary to make changes to the equipment and add a thermometer to solve it in a scientific way. The second key issue is the formulation of the plasterboard and whether the operator is reasonable in the production process. General production of gypsum board is used in China