The Importance of Water Retention of HPMC
April 24th 2024
As we all know, tile adhesive is generally made from cement and mixed with various additives. It is mixed with water at the construction site and then applied to the wall or floor. It generally has a certain initial strength about 12 hours after construction. The strength increases with time and is generally basically stable after 28 days.
Tile adhesive application guide
• Adjust the open time of tile adhesive: HPMC will form thin film on the surface of tile adhesive to reduce moisture evaporation. Help tile adhesive increase the open time.
• Increase tensile strength: the good property of water retention could make sure keep enough water for cement hydration.
• Good workability:Choose the right HPMC, could make the mortar easy to scrape on the wall, increase the efficiency.
• Increase the anti-slip property: can increase the binding strength of wet mortar, increase the anti-slip property.
This process of change in tile adhesives is a very complex physico-chemical reaction process. Changes in the temperature of the external environment directly affect the speed of the reaction process. The reasonable use temperature of tile adhesive is 5°C to 35°C, beyond this temperature range. As the temperature is too high, the water in the mortar evaporates quickly, which does not ensure the normal hydration and hardening of the cement in the mortar, and the quality of the mortar is not guaranteed. When the temperature is below 5°C, the hydration process of the cement becomes very slow.
The cement hydration process basically stops below 0°C and the strength development of the mortar may be seriously affected by freezing. Therefore, tile adhesives should be used correctly within the range of 5 °C to 35 °C and it is also important to ensure that the curing temperature of the adhesive before it reaches its initial strength is also within the range of 5 °C. °C to 35 °C. Therefore, when using tile adhesives in the autumn and winter months, it is important to pay particular attention to the minimum temperature changes in the weather forecast.
In the range of 5 °C to 35 °C, temperature changes mainly affect the speed of setting and hardening of the cement and have little effect on the final strength. Generally speaking, we can feel a reduction in the setting and hardening speed of tile adhesives below 15°C.
Therefore, during this time it is normal to find that the tiles we use do not set and harden at the same rate as before and will not have a serious impact on the final strength, but it is important to ensure that the glue does not reach its initial strength until 5°C Cures and hardens above this temperature. Also, at around 8°C, this lag time for setting and hardening can be around 2 days and the lower the temperature, the longer the lag time.
For example, when laying tiles, the curing speed of tile adhesive will be longer due to the slow evaporation of water in the tile adhesive on the back of the tiles; other fast hard tile adhesive products are relatively high due to their own fast curing speed and heat release. So the impact of 15°C is less.
Tiling is generally carried out at the end of the project schedule. For some projects that need to rush the schedule, you can choose fast hard tile adhesive according to the situation, which can greatly reduce the waiting time between processes.
SLEO Chemical Co., Ltd. is a large-scale professional manufacturer of fine chemical cellulose ether. After many years of unremitting efforts and continuous development, our company has become the largest manufacturer of cellulose ether and the only one with 75 degree Gel-temperature technology in Hebei Province.
If you want to get more information about the HPMC for Tile Adhesives, welcome to contact us today or request a quote.
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