The standard for defining water-resistant putty, "Jupiter for Building Interior" (JG/T298-2010) was introduced in 1998. Before the standard was introduced, the company had already produced water-resistant putty. The formula for water-resistant putty was first tested by Professor Shi Yumei of the Institute of Building Science. At that time, most of the country, including Beijing, still used water-proof general putty, or even unqualified putty that could not meet the JG/T298-2010 standard. The biggest hazard of these non-water-resistant putty is that the service life is short, and it is easy to hollow, peeling and cracking, which brings great hidden danger to the interior decoration. Beijing is the birthplace of construction putty, and its construction putty products are also the most formal and rapid development in the country. The third year after the formulation of the water-resistant putty standard - October 1, 2001, the Beijing Municipal Construction Committee and the Planning Committee released the document No. 192 of the Beijing Building Materials [2001] on the third batch of products for the elimination and restriction of the use of backward building materials. Restrict the use of “water-resistant gypsum-type wall putty†and inform that the substitute product should be “various water-resistant puttyâ€. Since then, all new construction projects in Beijing must use water-resistant putty for leveling, otherwise the entire project will not be accepted. Common construction putty has two forms, one is powder, one is cream, and water resistant putty is no exception. The water-resistant putty powder is mainly composed of calcium carbonate, ash calcium powder, cement, organic rubber powder, ultra-fine filler and water retaining agent. At present, most of the products are free of cement and organic rubber powder, and such products have high bond strength. And water resistance, is a rigid and alkaline product, but because many manufacturers do not add organic rubber powder, the product has poor water resistance and low strength, and the wall surface of the wall surface with putty has strong water absorption. The water-resistant putty paste is mainly composed of high-molecular organic matter, ash-calcium powder, ultra-fine filler and water-retaining agent. The putty is high in white, has high bonding strength, and has water resistance, and is a rigid and alkaline product. According to the "Building Interior Putty" (JG/T298-2010) standard, we can classify all indoor building putties into three categories: the worst one is the "pseudo-pure putty" that cannot meet this standard. The putty is mainly ore. Powder and glue are blended on site, which is easy to drum, peel and crack, and has a very short life. For example, the “scratch white†in the northern region and the “old powder†in Jiangsu and Zhejiang belong to this category; It is a product that meets the standard putty standard. These products have been explicitly restricted in Beijing. Although the degree of firmness is slightly improved, it is still easy to peel and crack, and the service life is short. The 821 type putty is typical. The best is water-resistant putty, not only strong, no drum, peeling, cracking, and long service life, the second decoration does not have to be shovel.
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Define the standard for water resistant putty
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