The selection of gypsum block should be paid attention to in the production equipment of desulfurized gypsum powder
1. Water resistance of desulfurization gypsum powder production equipment. Gypsum is a kind of slightly soluble material in water. Strict waterproofing measures must be taken where it may come into contact with water. For example, in the production of blocks, waterproofing agents or waterproofing additives are added to the ingredients, and some or all waterproofing veneers or coatings are applied to the partition walls according to the degree of possible contact with water; crevices and holes must be sealed with sealants; in addition, bricks or concrete wall panels can be made before partition walls are built.
2. Plate cracks. All kinds of light partition cracks have become a common problem. The main reasons are material problems, partition structure problems and connection between partition and main structure problems.
3. Light partition material. It can be divided into two categories: one is based on cement or silicate, and the other is based on gypsum. The hydration products of the former are mainly colloidal, while the latter are crystals. Colloids tend to expand and contract when the external temperature and humidity change, while the latter changes little. Compared with the slab, the joint of block partition masonry is shorter. As long as the suitable joint material is selected and the construction method is correct, the crack of gypsum block partition can be completely solved.
4. Sound insulation of gypsum block partition wall. According to the Technical Conditions for Non-Bearing Internal Partitions of Residential Components compiled by the Ministry of Construction, the indoor air acoustics meter for residential partitions should not be less than 50 dB and the field should not be less than 45 dB. The Laboratory of aeroacoustic meter for inner partition wall of unit is not less than 35dB, and the field is not less than 30dB. The existing non-load-bearing internal partition wall in our country is difficult to meet the requirements of the family wall. Necessary technical measures, such as double-layer method, are needed, and a sound insulation layer is added to the partition wall.
5. Price. Looking at the price of gypsum block, it is slightly higher than other types of block, but its construction is simple, efficient, saving plastering, dry construction, high cost performance.