As we all know, tile adhesive is generally made of cement, mixed with a variety of additives. When used, it is mixed with water at the construction site and then applied to the wall or ground. Generally, it has a certain initial strength about 12 hours after construction. With the extension of time, the intensity is also increasing, generally the intensity is basically stable after 28 days.
This change process of tile adhesive is a very complicated physical and chemical reaction process. The change of the external environment temperature directly affects the speed of this reaction process. The reasonable use temperature of tile adhesive is 5℃ to 35℃, which is used beyond this temperature range. The quality of the glue cannot be guaranteed, because the temperature is too high to quickly evaporate the water inside the glue and cannot ensure the normal hydration and hardening of the cement in the glue. When the temperature is below 5℃, the cement hydration process becomes very slow.
Cement hydration process below 0 degrees Celsius basically stopped and may also be severely affected by the freezing strength development of the glue. Therefore, the tile adhesive should be used correctly within the range of 5℃ to 35℃, and also to ensure that the curing temperature of the glue before reaching the initial strength is also within the range of 5℃ to 35℃. Therefore, in the autumn and winter seasons, we should pay special attention to the minimum temperature change of the weather forecast when using ceramic tile adhesive.
In the range of 5℃ to 35℃, the temperature change mainly affects the setting and hardening rate of the glue, but has no serious effect on the final strength. Generally, the degree of decrease in the setting and hardening rate of ceramic tile adhesives below 15°C is something we can perceive.
Therefore, if it is found that the rate of setting and hardening of the tile adhesive we use during this period is not as good as before, it is a normal phenomenon and will not have a serious impact on the final strength. The curing temperature is above the curing temperature. In addition, at around 8°C, the lag time for this kind of coagulation hardening may be around 2 days, and the lower the temperature, the longer the lag time. The picture above shows that when the vitrified tiles were laid in the early winter season of a project for 5 days, the tiles were uncovered and the internal tile adhesive was still not dry and the strength was low.
For example, when laying tiles, the moisture of the tile adhesive behind the tile evaporates slowly, so the setting and hardening rate of the tile adhesive will be relatively long; some fast-hardening tile adhesive products, due to their own hardening speed, release heat relatively high, Therefore, the effect of this 15℃ is smaller.
Tile laying is generally at the end of the project schedule. For some projects that need to be rushed, you can choose fast-hardening tile adhesives as appropriate, which can greatly shorten the waiting time between processes.