The use of gypsum self-leveling

The use of gypsum self-leveling

In practical applications, gypsum self-leveling is more widely used in floor heating backfill and secondary leveling of thin layers. Due to its outstanding advantages, it is especially suitable for fine decoration design, and can better present the expected design effect.

Next, we will compare gypsum self-leveling with traditional leveling materials from the two practical application directions.

1. Floor heating backfill

The traditional floor heating backfill material is ordinary pea stone concrete.

a. Laying thickness

Ordinary pea stone concrete: the structure is structural layer→insulation layer→backfill layer→leveling layer→decorative surface layer, with a thickness of about 8cm.

Gypsum self-leveling: no leveling layer is required, the laying thickness can be reduced, and the overall thickness is about 6cm.

b. Material properties

Ordinary pea stone concrete: It is not easy to mix evenly, has no fluidity, and is easy to produce voids, which is not conducive to heat conduction.
Gypsum self-leveling: easy to distribute evenly, has good fluidity, is not easy to produce voids, and is conducive to heat conduction.

c. Construction technology

Ordinary pea stone concrete: manual mixing, manual leveling, slow construction speed, long construction period, and cannot achieve accurate leveling.

Gypsum self-leveling: mechanical mixing, mechanical pumping, self-flow leveling, fast construction speed, shortened construction period, and accurate leveling.

d. Finished product effect

Ordinary pea stone concrete: After completion, it is difficult to ensure the surface flatness, and it is easy to cause cracking, hollowing, and peeling of the decorative surface.

Gypsum self-leveling: after completion, the surface is flat, and the decorative surface layer is not easy to crack, hollow, peel and so on.

2. Secondary leveling of thin layer

The laying of thin layers such as floor tiles, wooden floors, carpets and PVC floor materials requires high flatness of the base layer. The traditional leveling material is cement-based self-leveling.

a. Laying thickness

Cement-based self-leveling: the laying thickness is ≤5mm, which cannot be applied in areas with large ground height differences, and the application range is limited.

Gypsum self-leveling: The laying thickness is free, 3~60mm can be used, and the application range is wide.

b. Material properties

Cement-based self-leveling: high shrinkage, poor material stability.

Gypsum self-leveling: low shrinkage, not more than 0.02%, good material stability. At the same time, it is breathable and can improve indoor microcirculation.

c. Construction technology

Cement-based self-leveling: The final setting time of cement is longer and the construction period is longer.

Gypsum self-leveling: 3 hours after completion, it can be used by people, and other processes can be carried out after 24 hours, shortening the construction period.

d. Finished product effect

Cement-based self-leveling: After completion, the surface is rough, and it is easy to cause surface cracking, hollowing, and peeling.

Gypsum self-leveling: After completion, the surface is fine and smooth, and it is not easy to crack, hollow, peel and so on.

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