The role of hydroxypropyl methyl cellulose (HPMC) in gypsum self-levelling.
In the gypsum series products cellulose ether mainly plays the role of water retention, increase lubrication, etc. At the same time, it has a certain slow-setting effect, solving the problem of drum open columns and initial strength not reaching during construction. And it also can extend the working time. The gypsum-based self-levelling mortar is made of gypsum, fine quartz sand and various functional admixtures in a certain proportion in the factory through the use of automatic production lines by precise ingredients evenly mixed into the product.
In recent years, gypsum-based self-levelling mortar has gradually gained popularity among major developers due to its excellent performance and the market usage rate has gradually increased.
Why is gypsum-based self-levelling mortar so popular and what is it good for? It is mainly because it has the following advantages.
I. Good shrinkage, no cracking
The shrinkage rate of gypsum-based self-levelling mortar is only 1/3 of that of cement self-levelling mortar, which may lead to cracks in the mortar due to the excessive shrinkage rate. Therefore, the thickness of cement self-levelling mortar construction cannot exceed 5mm. So in the actual construction process, cement self-levelling mortar should take appropriate maintenance measures to confirm the quality of the project. While gypsum-based self-levelling mortar will not appear in this situation.
II.Convenient construction, shortening the construction period
The gypsum-based self-levelling mortar construction of the ground, accurate size, high level, no drums, no cracking. Easy and convenient operation, high efficiency, short time consumption. Its speed faster 5-10 times than the traditional ground material construction.
III. no need for secondary levelling, saving costs
First of all, the price of gypsum-based self-levelling is cheaper than that of cement self-levelling. Secondly, gypsum-based self-levelling only requires one construction, no secondary levelling. And the decoration can be directly laid on the floor. Therefore, compared to the use of cement self-levelling, the use of gypsum-based self-levelling for ground levelling can save a lot of costs.
IV.one-time construction, no maintenance.
The gypsum-based self-levelling mortar has initial and final setting requirements. And it can be used after construction until the final setting. Without the need for later maintenance. The initial setting time of gypsum-based self-levelling mortar products is 70-80 minutes, and the final setting time is about 3 hours. After the final setting, there is no need for maintenance.
If the floor is finished with wooden flooring. It is easy to meet the requirements of wooden flooring installation by using gypsum-based self-levelling matching installation. It provides a solid base surface, improves the leveling accuracy of the floor and allows the floor to be paved and installed with the joints at the same level. Thus protecting the surface material above and extending the service life of the flooring material.