According to the data released by the General Administration of quality supervision, inspection and Quarantine of China on the 20th of last month, in the supervision and random inspection of 364 kinds of ceramic brick products, 97 kinds of products were unqualified, and the unqualified rate exceeded one quarter
>& gt;& gt; Link: experts teach you how to choose ceramic tiles carefully.
experts say that "ultra white" may radiate too much, and the water absorption rate is low, and the paving may not be firm.
according to the data released by the General Administration of quality supervision, inspection and Quarantine of China on the 20th of last month, in the supervision and random inspection of 364 kinds of ceramic tile products, 97 kinds of products are unqualified, and the unqualified rate is more than one quarter. Among them, the problems of unqualified products mainly focus on the failure strength, water absorption, size, radioactivity and so on. In addition to urging businesses to control production quality, what are the implications for consumers
● wall tiles are not the lower the water absorption, the better
many people believe that the lower the water absorption of ceramic tiles, the better, because ceramic tiles with higher water absorption are easier to absorb water, which will lead to the cracking of the surface of ceramic tiles and the peeling of the whole ceramic tile after cold shrinkage and thermal expansion. However, liuzhiyan of Dongpeng ceramics said that the lower the water absorption, the better is relatively speaking. For wall tiles, it still needs a certain water absorption to ensure that the hollowing rate of wall tiles is reduced when cement mortar is used for paving, and the paving is firm. Liu Zhiyan said that if you don't use any tile adhesive and only use cement mortar, it is recommended to choose wall tiles with water absorption within a certain range, such as about 10%. At the same time, when paving, you must ensure that the wall tiles are soaked for enough time, 2-4 hours is appropriate. If you choose some tiles with low water absorption, it is recommended to add safe and environmentally friendly tile adhesives when paving
● the finer the ceramic tile particles are, the higher the strength is.
the strength of the ceramic tile is related to its pressure bearing and bending resistance, and the strength depends on its density. In this regard, Liu Zhiyan said that when consumers choose ceramic tiles, especially for floor tiles in public spaces such as living rooms, they can identify the strength of ceramic tiles by checking the fineness of particles on the back of ceramic tiles. Generally, the finer the particles of ceramic tiles, the higher the density, and the higher the destruction strength
>& gt;& gt; Link: how to calculate the usage of ceramic tiles
● glazed tiles may produce burst glaze
many people will encounter the problem of ceramic tile cracking. Liu Zhiyan said that one kind of ceramic tile cracking is caused by wall deformation and cracking, and it is easy to cause ceramic tile cracking when the cement grade is too high during paving. As for the ceramic tile itself, there is also a cracking phenomenon, which is the "burst glaze" of glazed tiles, and the reason is that the glaze thickness is uneven during production, and some glaze layers burst when burning in the kiln. It is suggested that consumers choose more trusted brands to buy ceramic tiles
● be alert to excessive zirconium silicate when buying ultra white bricks.
the radiation of ceramic tiles in the quality inspection report is not up to standard. Miao bin, Secretary General of China Building and Sanitary Ceramics Association, said that ceramic tiles and other ceramic products have radiation, and there is no same conclusion for countries with high environmental protection standards such as Germany. Therefore, the environmental protection performance of ceramic tiles and other ceramic products is beyond doubt, and consumers can use them with confidence. In addition, as for the raw materials of ceramic products such as ceramic tiles, Miao Bin said that radioactive substances will continue to decay, and the radioactivity of these raw materials can be ignored after natural purification and artificial processing. As long as consumers buy qualified class a ceramic tiles, no matter how large the area is, they don't have to worry about their radiation problems
the unqualified products are mainly due to the addition of zirconium silicate, a chemical substance, to the tested variety. It is understood that in the production process of polished bricks, in order to achieve the whitening effect, an appropriate amount of zirconium silicate will be added, while some enterprises add too much for the production of ultra white bricks, which is the main reason for the excessive radiation of tiles