What are the reasons for the hollow drum falling off of ceramic tiles


Release time:

2015-08-10

Author:

New Earth Group

Source:

What are the reasons for the hollow drum falling off of ceramic tiles

The common hollowing is mainly caused by the mismatch between the traditional tiling process and the new building materials. In addition, there is a phenomenon that the new facing material does not match the traditional paste material. Cement mortar thick paste method with high density porcelain brick, vitrified brick caused by tile hollowing, falling off.
When using cement mortar thick paste method to paste ceramic tiles, if seamless paste is adopted, or caulking is too early, because the water content in the bonding mortar far exceeds the water demand for cement hydration, the excess water is nowhere to be lost, thus causing the waterproof layer to be infiltrated by water for a long time, and the tensile strength of the waterproof material is greatly reduced. In the state of long-term water infiltration, the bonding strength is greatly reduced. At this time, 20~30mm thick cement mortar itself plus the weight of porcelain tiles per square meter up to 20kg or more, far more than the invasion of the waterproof layer can carry the load, in the facade will inevitably lead to the waterproof layer layer layer peeling.
Precautions:
① Ensure the thickness of the waterproof layer and reserve enough time for the curing of the waterproof layer before tiling;
② Reserved tile expansion joints when pasting tiles, and caulking treatment after 24 hours (depending on the different climate can be adjusted accordingly);
③ Select tile adhesive as bonding material and use thin paste method for construction.
Tile glue is improved on the basis of cement mortarTile paste material, with ① thin coating method, light weight, less dosage and cost saving; ② Good bonding effect and excellent durability; ③ No brick wet wall is used during construction, which can improve efficiency, convenience and quickness. ④ Excellent impermeability and anti-aging properties; ⑤ Adding redispersible latex powder can absorb the stress between the substrate and the ceramic tile and avoid the ceramic tile hollowing or falling off; ⑥ Anti-slip and adjustable; ⑦ Non-toxic and tasteless, green environmental protection and other characteristics. Because of the excellent paste performance of the tile glue itself, it is generally used in the use of thin paste method (1.5 ~ 3.mm), both to ensure the paste effect, but also to save costs. If the thick sticking method (10~30mm) is adopted, the deformation base of the ceramic tile adhesive itself will be increased due to the cement hydration process and the change of the external environment, thus increasing the overall deformation of the ceramic tile adhesive, because the inherent compatibility between the ceramic tile adhesive and the cement-based waterproof material ensures the effective bonding between them, while the deformation difference between the ceramic tile and the ceramic tile adhesive due to different materials is very large, eventually lead to tile glue and tile may appear between the empty drum, fall off the phenomenon.
Preventive measures: use the correct thin paste method for construction.
In addition, there is a phenomenon that the new facing material does not match the traditional paste material.
Cement mortar thick paste method with high density porcelain brick, vitrified brick caused by tile hollowing, falling off.
The principle of cement mortar paste: cement mortar penetrates into the gap on the back of the ceramic tile, sets and hardens, and plays a mechanical embedding role similar to a key inserted into a keyhole, connecting the ceramic tile with the substrate. Its bond strength depends on the porosity of the substrate and the water absorption of the tile.
The principle of ceramic tile adhesive pasting: ceramic tile adhesive not only has the traditional mechanical embedding principle of cement mortar, but also can be pasted by the intermolecular force generated by the polymer film on the bonding surface of ceramic tile and ceramic tile adhesive when there is no gap on the ceramic tile surface and the water absorption is small.
Therefore, when the facing brick is a new type of high-density porcelain brick and vitrified brick, the traditional cement mortar is used as the paste material, which is difficult to penetrate into the porcelain layer to form mechanical embedding, resulting in the ceramic tile falling off from the cement mortar layer. Especially in the use of seamless paste tiles more prominent.
Precautions:
When the facing brick is a new type of high-density porcelain brick or vitrified brick, the tile adhesive shall be used as the paste material and the construction shall be carried out in accordance with the corresponding supporting construction method.
In short, to fundamentally avoid the phenomenon of tile empty drum, fall off, we must first break the traditional concept, a correct understanding of new materials, new methods. Followed by the choice of regular brand products, by professionals in strict accordance with the construction specifications and product instructions for construction. In particular, designers must integrate mortar materials, paste materials, ceramic tiles, climate and other factors to design reasonable material selection and construction plans, otherwise it will inevitably cause unpredictable consequences.
The principle of cement mortar paste: cement mortar penetrates into the gap on the back of the ceramic tile, sets and hardens, and plays a mechanical embedding role similar to a key inserted into a keyhole, connecting the ceramic tile with the substrate. Its bond strength depends on the porosity of the substrate and the water absorption of the tile.
The principle of ceramic tile adhesive pasting: ceramic tile adhesive not only has the traditional mechanical embedding principle of cement mortar, but also can be pasted by the intermolecular force generated by the polymer film on the bonding surface of ceramic tile and ceramic tile adhesive when there is no gap on the ceramic tile surface and the water absorption is small.
瓷砖粘结剂

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