When buying ceramic tiles to decorate a house, we have always decided whether to buy good ceramic tiles by price. Expensive ceramic tiles are destined to be good ceramic tiles, while cheap ceramic tiles are definitely not good products. After buying ceramic tiles for decoration Have you ever had such an idea about housing? Of course, it’s not all true, this is just one of them, actually! ! ! There are still skills when buying ceramic tiles. Zhongtaojun reminds you to pay attention to these 9 indicators of Tile Decoration Indicators when buying tiles. This will ensure that you can buy good tiles. Don’t you plan to take a look?
1. Size deviation
The dimensions of ceramic tiles include side length (length, width), side straightness, right angles and surface flatness. Dimensional deviation refers to the allowable deviation of these dimensional averages from the working size.
Ceramic tiles are fired at high temperatures, and deformation cannot be completely avoided. Deformation within the scope specified by the standard can be regarded as normal.
Testing standards:
The common deformation (edge curvature) range is: ±0.2% for porcelain polished tiles (maximum deviation ≤2.0mm); ±0.5% for other porcelain tiles; ±0.5% for colored glazed tiles; +0.5% for glazed tiles - 0.3%. You can use a simpler inspection method when purchasing:
Corner verticality - lay more than four products on a flat sandy surface in the same direction as the bottom trademark, and check whether the intersection of the four edges is flat;
Flatness - Stack the tiles face to face, align the four corners, and rotate one of them. If it rotates easily, it means that the tiles are not flat enough and may be convex.
2. Water absorption
The strength of ceramic tiles is closely related to water absorption. The water absorption rate is low, the density of the brick is high, and the strength of the ceramic tile is high, and vice versa. Unqualified water absorption of ceramic tiles will affect the construction quality. Various quality defects are prone to occur after the ceramic tiles are laid, which may lead to consumer disputes.
Inspection standards:
Ceramic tile products can be divided into five categories according to water absorption rate, namely porcelain tiles (E≤0.5%), stoneware tiles (0.5%＜E≤3%), fine stoneware tiles (3%＜E≤6%), stoneware tiles Bricks (6%＜E≤10%) and ceramic bricks (E＞10%), products whose water absorption rate is not within the range of the corresponding category can be regarded as failing.
You can use the drip test method when purchasing: drop water on the back of the ceramic tiles and observe the diffusion of water. Bricks that diffuse faster have greater water absorption, and vice versa.smaller.
3. Anti-slip property
Anti-slip properties refer to the performance of ceramic floor tiles in overcoming slipping in special environments, which is mainly related to their friction coefficient.
Inspection standards:
The new national standard adds a standard for the friction coefficient of floor tiles, requiring a single value of the test result to be ≥0.50 (dry method). From the perspective of purchasing ceramic tiles, whether the surface of the tiles is rough and whether anti-skid materials (anti-skid glaze, anti-skid coating, anti-skid liquid, etc.) are added are all important factors that affect the anti-skid performance of the tiles.
4. Hardness
High-quality ceramic tiles generally have high hardness and strong toughness, and are not prone to breakage or deformation after being laid.
Inspection standards:
When purchasing, you can use the method of tapping and listening: take two ceramic tiles and tap them gently. If the sound of the brick is crisp and has some metallic sound, it indicates that its internal quality is better and its hardness is higher; if the sound is hoarse, the sound inside the brick is There may be cracks and the hardness is not high.
5. Wear resistance
It is an important indicator for testing the wear resistance of ceramic tiles. Ceramic tiles with higher wear resistance are less prone to scratches.
Inspection standards:
The new national standard for "ceramic tiles" has clear regulations on the wear resistance of glazed and unglazed tiles: for unglazed floor tiles with a water absorption rate of less than 3%, the wear-resistant volume must be less than 175mm2; for unglazed floor tiles with a water absorption rate of greater than 3%, For unglazed floor tiles with a water absorption rate of less than 6%, the wear-resistant volume should be less than 345mm2; for unglazed floor tiles with a water absorption rate greater than 6% and less than 10%, the wear-resistant volume should be less than 540mm2. As for the wear resistance of glazed floor tiles, the new national standard for "ceramic tiles" is divided into six levels from 0 to 5, corresponding to different "visible wear grinding revolutions". The higher the level, the better the wear resistance of the tiles. The better.
6. Glaze crack resistance
This indicator only applies to glazed tiles, and refers to the ability of the glaze layer of ceramic products to resist changes in the physical environment and prevent micro cracks. Ceramic tiles with poor glaze crack resistance are prone to cracks after they are laid. Irregular and fine cracks may appear in minor cases, and they may break and peel in severe cases.
Inspection standards:
The professional way to test the glaze cracking resistance is to subject the entire brick to high-pressure steam in an autoclave, and then observe the glaze cracking of the brick from the glaze staining.
Generally, consumers can gently touch the glaze of ceramic tiles with their hands when purchasing.The glaze feels delicate and smooth, with no uneven feeling. The luster is crystal clear and the matte glaze is soft and comfortable. Observe the glaze surface under strong light to ensure that there are no glaze defects such as blisters and small holes.
7. Radionuclide limits
It is an important indicator for testing the safety of decoration materials. The decay of radioactive elements can produce radiation, and excessive radiation can cause damage to the human body.
Usually, the reason for the high radioactivity limit of products is not only the high radioactivity of the raw materials themselves, but also the unreasonable formula of the raw materials. Some manufacturers excessively add some highly radioactive minerals in pursuit of the decorative effect of ceramic tiles.
Inspection standards:
The national mandatory standard "Radioactive Nuclides Limits for Building Materials" (GB 6566) divides the radioactivity levels of building decoration materials into three categories: A, B, and C. Class A decoration materials have the lowest radioactivity level, their production, sales and use are not restricted, and they can be used for interior decoration in living rooms. The radioactive specific activities of its natural radionuclides radium-226, thorium-232, and potassium-40 meet the requirements of IRa≤1.0 and Iγ≤1.3.
8. Destructive strength
An important indicator to measure the strength of ceramic tiles generally refers to the pressure resistance of ceramic tiles. The level of this performance indicator directly affects the service life of ceramic tiles.
Too low strength can easily cause ceramic tiles to break, which can bring hidden dangers to personal safety during use.
Inspection standards:
The thickness of porcelain bricks is ≥7.5mm, and the average damage strength is not less than 1300n; the thickness of ceramic bricks is ≥7.5mm, and the average damage strength is not less than 600n.
9. Modulus of rupture
It is also a key indicator to measure the strength of ceramic tiles. Products with low modulus of rupture are prone to cracking, cracking or surface defects during use.
There are many factors causing the low modulus of rupture of the product, mainly the unreasonable raw material formula and the loose control of the production process such as molding and firing temperature and time.
Inspection standards:
The average modulus of rupture of porcelain bricks is not less than 35mpa, and the individual value is not less than 32mpa. The average modulus of rupture of ceramic bricks is not less than 15mpa, and the individual value is not less than 12mpa.
The above content is the content shared today about Tile decoration indicators. You should keep these 9 indicators in your mind carefully. You don’t have to worry about not buying good tiles next time you buy tiles. Okay, that’s it for today’s sharing, ending the National DayHave you been moving bricks during the short holiday? O(∩_∩)O haha~ slip, slip, slip!
