The water absorption rate of ceramic tiles is not marked, so I don't care. Improper construction is easy to cause falling off.

Recently, the news that the water absorption rate of ceramic tiles is unqualified has caused many consumers to pay attention to "water absorption rate", a word that may not be known before and is not often heard in the process of buying ceramic tiles, which actually has a lot to do with the quality of decoration. Relevant experts believe that tiles with high water absorption rate may fall off, while wall tiles with low water absorption rate. ...

Recently, many consumers have begun to pay attention to the news that the water absorption rate of ceramic tiles is unqualified? Water absorption? This word may not be known before, and it is not often heard in the process of buying tiles. In fact, it has a lot to do with the quality of decoration. Relevant experts believe that tiles with high water absorption rate may fall off, while wall tiles with low water absorption rate are also easy to fall off due to improper paving. The reporter visited the survey and found that when consumers buy ceramic tiles, they still pay more attention to the appearance of the products and do not pay attention to water absorption.

Water absorption Water absorption refers to the ability of ceramic products to absorb and penetrate water to a certain extent, that is, the percentage of water absorbed by openings in ceramic products to the quality of products. Generally speaking, the water absorption rate of ceramic tile is the ratio of the increased water quality to the original dry brick quality after the ceramic tile fully absorbs water.

Low water absorption indicates that the product has high strength, difficult expansion and high internal stability, so water absorption is also one of the important indexes to evaluate the internal quality of ceramic tiles. Too much water absorption is easy to cause the green body to expand and crack, which in turn leads to wall tiles falling off or floor tiles hollowing out.

The water absorption of ceramic tiles is not concerned.

Recently, the Industrial and Commercial Bureau of Guizhou Province randomly sampled the tiles in the market in this province and found 23 batches of unqualified products, 4 of which were in danger of falling off after use because of their unqualified water absorption. A few days ago, Mr. Tian, a consumer in Beijing, also encountered a sudden fall of kitchen wall tiles. When cooking, the tile fell off, but fortunately it was not on the top of the head. ? According to Mr. Tian's memory, the middle-priced brand tiles were selected for decoration at that time, and they were carefully inspected after the decoration. However, this situation has just appeared in the past year, which is very puzzling.

Liu Yanjun, manager of Beijing Engineering Department of Yuanzhou Decoration, said that the tiles with high water absorption rate are poor in quality because of loose blank density, and they are easy to crack and fall off when pasted on the wall. But low water absorption does not mean that it will not fall off. Liu Yanjun said that ceramic tiles with low water absorption rate are more prone to problems when pasted because of their hard bodies and high density.

According to Jing Zhiren, vice president of Kathy Century Building Materials Co., Ltd., cement mortar is often used in tile paving, because the moisture contained in cement mortar can be absorbed and solidified by tiles, thus forming the grip of tiles on the wall. However, with the increasing density of ceramic tiles and lower water absorption, it is difficult to have a grip with cement mortar. Even if it was not hollowed out when it was pasted at that time, it was inevitable to fall off in the future.

The reporter visited the market and found that most tile sales staff did not introduce water absorption. In Dong Peng Ceramic Tile Shop, the headquarters base of He Shili Long Min Ceramics, the sales staff recommended several ceramic tiles to the reporter, all of which were explained from the aspects of color and style. Asked about the water absorption rate, the other party said that the water absorption rate is qualified, so you can go to the wall without soaking in water.

Wang Long, manager of Kelpolo Customer Service Department of Beijing Huanai Lijia Building Materials Co., Ltd. believes that at present, consumers rarely ask about water absorption when buying bricks, and most of them choose for brand influence, and only choose colors and specifications when actually buying bricks. Wu Junlin, general manager of Beijing Sanmeite Ceramic Marketing Center, also said that although many products are marked as suitable for walls or floors, there are still many consumers who match their own products because of their personality, and then they are prone to fall off and other problems.

Improper construction is easy to cause falling off.

In fact, the water absorption of ceramic tiles is an important performance index of products. The water absorption is different, and the paving method is different. It is understood that in the packaging description of ceramic tile products, the water absorption index should be included, and suggestions on paving methods should be attached; In the construction process, decoration companies will adopt different paving methods according to different product characteristics. If the paving method is improper, it is easy to cause the tiles to fall off.

According to Cui Tao, Engineering Director of Modern Decoration Beijing Branch, there are two ways to spread wall tiles: cement mortar pasting method and thin pasting method. He said:? Cement mortar sticking method is a common construction method, that is, the tiles are soaked in water for a period of time before laying, then the cement sand is mixed and debugged according to a certain proportion, and then placed behind the tiles and laid on the wall. This method is a traditional construction method, which is suitable for ordinary light bricks and glazed tiles. Another method is the popular thin pasting method, that is, before laying bricks, the wall foundation must be leveled, and then the tiles are pasted on the wall with tile adhesive, which is more complicated. This method is suitable for wall tiles with low water absorption and heavy weight. ?

Cui Tao said that ceramic tile products are generally described in the packaging, and there are suggestions on the pasting methods of ceramic tiles, but ordinary consumers pay little attention to them when purchasing, and generally only look at two aspects: strength and color. Although the product has construction suggestions, the tiles are fired in a brick kiln, and the weather and climate in the firing process will have an impact on the quality of the brick body, even in the same brick kiln. In the process of construction, builders often judge the paving method and soaking time of tiles by sprinkling water on the glaze. If you encounter an inexperienced construction team, it will also cause tiles to fall off.

According to Hu Zengguang, the engineering director of Yezhifeng Decoration Beijing Branch, there are many reasons why tiles fall off. In addition to improper paving methods, improper construction is also an important reason. He said:? For example, the use of expired cement, high clay content in sand, improper proportion of cement mortar, knocking on the wall brick before changing the position when paving, and unclean treatment at the grass-roots level will all lead to the later ceramic tiles falling off. This kind of project can't be detected when it is first pasted, and the tiles will fall off after a period of use. Some consumers invite informal decoration teams to carry out construction, which can easily cause such problems. ?

■ The water absorption rate of market visits is unmarked.

On February 3rd, 65438, the reporter visited Red Star Macalline North Fifth Ring Shopping Mall and B&Q Laiguangying Store, and found that most ceramic tile salesmen did not take the initiative to introduce the water absorption rate. The reporter found that most tiles do not have digital signs of water absorption when they are sold, and the introduction of water absorption by sales staff is also varied.

At Red Star Macalline North Fifth Ring Shopping Mall? Jialetao? In the store, the salesperson told the reporter about? Water absorption? A questioning expression? Does water absorption have no effect on tile quality? . The salesperson pointed to the installation instructions on a product packaging box and explained. Let's explain here that it needs to be soaked in water for half before paving, which means water absorption. ?

The other one is called. A new era in Rome? In our shop, I heard that the reporter encountered the problem of wall tiles falling off, and immediately said that it was because the wall tiles posted did not absorb water. After recommending a wall tile that absorbs water very quickly to the reporter, she went on to say that because wall tiles are popular now, many people stick non-absorbent floor tiles on the wall, and these tiles are useless even if they are soaked in water before sticking. Bricks that don't absorb water are either bad or troublesome to stick. ? The reporter asked how to look at the water absorption rate of bricks, and the sales staff said: There is no definite figure, so it is usually taken home for the installer to understand? .

At B&Q Laiguangying Store, the reporter said that he wanted a brick with a firm paste. The salesperson recommended a special brick with Kelpolo 80 yuan/m2, and said that as long as it is a clay brick, its water absorption will be better and it will not fall off easily when it is stuck on the wall.

At present, most ceramic tile manufacturers are not responsible for installation, so many ceramic tile manufacturers don't care about installation. What is the name of Red Star Macalline North Fifth Ring Shopping Mall? Dong Peng high-end? Datang hesheng? In the shop, the salesman said? You don't need to soak in water, but use cement mortar. There is nothing to pay attention to. ?

■ Myth: Wall tiles and floor tiles cannot be mixed.

Question: The lower the water absorption, the better.

Interpretation: For tiles with low water absorption, the firing temperature will be higher, the pressing pressure will be heavier, and the price will definitely be more expensive, so the lower the water absorption, the better. However, the water absorption rate is not the standard for testing the quality of ceramic tiles, and the price of ceramic tiles will also rise due to factors such as color and design. In addition, due to the decrease of water absorption, the quality of tiles is aggravated, and the bonding force between tiles and cement mortar is also weakened, which often leads to problems in paving. Therefore, the quality of a tile can not be measured only by water absorption.

Question: Can wall tiles and floor tiles be mixed?

Interpretation: Ceramic tiles have different physical and chemical properties because of their different ways of use when they leave the factory. For example, floor tiles and wall tiles are different in water absorption. The wall tiles are on the high side and the floor tiles are on the low side. It is suggested that when using ceramic tiles, consumers should use them according to the instructions of the packaging box or manufacturer and the nature of the purchased ceramic tiles for safety reasons. Even if you need to change your practice, you should listen to many suggestions, such as using a firmer paste method on floor tiles to avoid leaving security risks.

Problem: The thicker the wall tiles are, the less likely they will fall off.

Interpretation: Some consumers think that the thicker the wall tiles, or the higher their strength, the less likely they will fall off. In fact, these two indicators have nothing to do with whether they will drop in the future. For example, ordinary red bricks are thick enough, but their water absorption is extremely high. If it is not soaked in advance, it will definitely fall. Strength refers to the hardness and quality of the brick body, which has nothing to do with whether it falls off or not.