Gypsum-based self-leveling is not waterproof. Due to the easy hydration of gypsum, gypsum self-leveling is not water-resistant and cannot be used in water-present, humid environments, such as swimming pools, outdoors, toilets, etc. If plaster self-leveling is used in these cases, it needs to be waterproofed. Specifically, after doing a good job of self-leveling, waterproof paint should be painted, and after the waterproof painting is completed, 30mm of water can be stored for closed water test.
Please note that the thickness of gypsum-based self-leveling is generally 25 35mm, the drying speed is slow, and it generally takes 72 hours to brush and waterproof, and 7 days to lay the floor. In addition, it has the disadvantage of being prone to cracking and hollowing.
Gypsum-based self-leveling mortar, also known as gypsum self-leveling mortar, is a dry mortar mixed with high-strength gypsum as the main cementitious material (such as building gypsum, high-strength gypsum, cement), combined with special aggregates (such as quartz sand, machine-made sand, heavy calcium, vitrified microbeads, steel slag, crushed stone, etc.) and additives. It has a unique set of features and benefits:
1.No cracking, no hollowing, and the thickness is controllable. Its shrinkage is less than 002%, can be poured at any thickness of 3 60 mm, this feature greatly increases the range of self-leveling.
2.High leveling accuracy, high fluidity, automatic leveling, extremely high flatness. This provides more favorable conditions for the laying of various types of surface materials, which in turn contributes to the improvement of the quality of the building.
3.Strong viscosity and good fluidity. This makes gypsum self-leveling materials ideal for those with rough surfaces such as rebar, tile, concrete, etc. Its high viscosity and fluidity ensure that the self-leveling material forms a uniform and flat layer on the surface and exhibits excellent adhesion to the surface.
4.Good crack resistance. Self-leveling materials can not only improve the surface hardness and uniformity of the ground, but also enhance the crack resistance of the ground.
5.High strength, no ash. Its strength can be freely controlled between 15MPa and 60MPa according to different environmental requirements, which further improves the adaptability of the product.
6.It can be mechanized construction, with high efficiency and shortened construction period. Mechanized pumping construction makes the daily laying area can reach 800 1000, the product stability is high, and people can walk in a short time, thus greatly shortening the construction period.
7.Reduce costs and increase floor heights. Due to its low density, it can effectively reduce the building load, reduce the construction cost, and improve the seismic rating of the building. In addition, the gypsum-based self-leveling thickness can be as thin as 3 mm, which helps to increase the layer height and improve space utilization.
8.Good thermal insulation and sound insulation. Its thermal stability is good, and it is used as a "floor heating" backfill leveling, and will not cause cracking, bulging and other phenomena due to thermal expansion and contraction. After hardening, it has a certain elasticity, so it has a certain sound insulation effect.
Due to the above characteristics, gypsum-based self-leveling is widely used in the ground engineering of industrial buildings such as workshops, workshops, stores, exhibition halls, parking lots, as well as tooling and home improvement projects such as ground leveling, renovation and renovation of hospitals, gymnasiums and offices.