In front of the putty on the indoor wall, most workers now paint the plaster on the wall once or twice to replace the cement mortar for rough leveling of the wall. Why did you choose gypsum to do this construction, and what are the benefits of its construction? I will explain the advantages and disadvantages of whitewashed plaster.
The product of plaster plaster is not much concerned by the average person. Prices, brands are very confusing, products from three or five hundred and one tons to more than a thousand and a ton, what is the difference between them. I am still the old rule, first talk about the origin of the plaster, advantages and disadvantages, and finally from the environmental protection and performance to explain.
The reasons for the confusion of plaster products in my opinion are several points: First, China's gypsum production technology is not passed, long-term production of low-quality products, resulting in low unit price of such products, low willingness to produce in large factories; second, the gypsum raw materials used in China's building materials are mostly desulfurized gypsum from thermal power plants, and desulfurization gypsum is a by-product of environmental protection production in power plants. The stability of its product quality is not good, resulting in the difficulty of controlling the production quality, so most building materials companies are not willing to produce. Third, foreign brands with advanced gypsum production technology take high-quality products as barriers to maintain a lucrative high-end market, so it has caused chaos in low-end products and less high-end choices.
With the requirements of energy saving and consumption reduction and rapid delivery in China's construction industry, gypsum-based products have the advantages of light texture, fast drying, not easy to crack and convenient construction compared with cement-based products. Then there is the advantage of raw material prices of gypsum products, so that domestic building materials enterprises for gypsum products continue to increase investment, so that the quality of gypsum products has been better improved, the price has a certain degree of decline.
In the domestic whitewash gypsum implementation is the national standard GB/T 28627-2012 plaster plaster This standard is divided into surface layer whitewash gypsum (F), bottom layer whitewash gypsum (B) and insulation layer whitewash gypsum (T). The surface layer of plaster (F) is very delicate and is used to paint the outermost layer of plaster material on the plaster or other substrates; the bottom layer of plaster usually contains aggregates, which are generally sand, which is used for base leveling; the insulation layer gypsum generally increase vitrified beads to improve thermal insulation. At the same time, due to the improvement of production technology, lightweight plaster (L) has been added to this standard, which can be simply understood as a medium and high-grade product of gypsum products. There is also caulk plaster with caulking in the gaps in the wall.
From the market price of 400 to 600 yuan / ton of products are generally heavy whitewashed gypsum, generally used as a base layer of whitewashing. In the main building, aluminum molds and wood molds are generally used for construction. From my contact point of view, the wooden mold because of the splicing, the construction accuracy of the aluminum mold has a certain gap; but the emergence of a large number of bubbles on the aluminum film wall, so that the grass-roots small holes are many, while the difference in the quality of the mold release agent product, making the follow-up putty construction become extremely difficult, and now the fine decoration construction is pressed at the last node of delivery. Because cement products have a long maintenance cycle and the risk of cracking, workers will now do a job of the interface on the wall to increase the adhesion and start the construction of plaster.
The products of more than 1,000 yuan / ton on the market are basically light plaster plaster, and the mid-term light plaster is divided into 130 types and 160 types. A simple explanation of the 130 type is a ton of plaster according to the thickness of 1CM can be 130 square meters, and the same reason for the 160 type is that the thickness of 1 ton and 1CM can be 160 square meters.
From the perspective of environmental protection, most of the raw materials for plaster are now produced by combining the desulfurization gypsum of thermal power plants after calcination at high temperatures to form semi-aqueous gypsum and then add other additives. The products of large factories at home and abroad, because of the rigor of calcination and other supporting production processes, the treatment of various impurities and heavy metals will be very complete, and environmental protection can not be worried. However, the product quality of the unmarked cottage manufacturers is not good for me to evaluate.
Whitewashed plaster has many advantages, but it also has a significant disadvantage that it cannot be used in wet areas, such as bathrooms, open balconies, and water is easy to fall off, so in places such as toilets, cement-based products must also be used for leveling.
In terms of performance, the stucco adhesion is strong, the shrinkage is small, it is not easy to fall off, it is not easy to empty the drum, and it is not easy to crack; It is convenient to construct, less ash on the ground, and quick to operate; Its strength grows fast, easy to dry, basically after the medium coagulation period after the performance is very stable, due to the natural hydrophilic characteristics of gypsum, it also has a good thermal insulation, help to adjust the indoor temperature. Finally, when the stucco plaster is used, the weight of the material used in the same area can basically be discounted in half compared to the cement, so the cost of the material will be much less.
Finally, the purchase of skills, stucco gypsum in the factory production of products, generally called plaster plaster, packaging is about 25 kg of paper bags, there will be a complete label description, including quality implementation standards, shelf life (generally 3 to 6 months), water ratio, etc., and cottage manufacturers are generally plastic woven bag packaging, no production date such information, packaging is generally about 50 kg, we can be very stubborn about their own needs to choose.