|
5221
CEMENT SCREED FINE 25MPa
Formerly While stocks last. Replaced by 5286.
The reliable choice for residential construction
Bonded screed for floor coverings
- 3-10mm application thickness suitable for creating bonded screeds.
- 0,7mm grain size: For fine levelling of a smooth surface, suitable for floor coverings e.g. tiles, parquets, laminates, PVC, carpets, etc.
- For medium loaded floors in family houses and apartment buildings.
Area of application
- Indoor: floor
Heating and cooling area
- Floor
Processing method
- For hand and machine processing
- For fine floor levelling.
- Creation of combined (connected) intended for laying of spreadable floor coverings, e.g. tiles, parquets, floating floors; under thin layer floor coverings (PVC, marmoleum, carpets, etc.) it is necessary to level the surface with a suitable self-levelling screed of Cemix.
RECOMMENDED SYSTEM PRODUCTS
Processing details
Learn more about technical details for processing this product.
Substrate requirement
The substrate must comply with the applicable standards, must be solid, free of loose particles, free of dust, paint, residues of demoulding substances and efflorescence. It must be sufficiently rough, dry and evenly absorbent. The surface shall not be frozen or water-repellent. The substrate must be stable in volume.
Substrate preparation
Before applying the screed to the old concrete, the substrate must be moistened and treated with Cemix contact bridge 1500. It is necessary to respect the working or structural joints and to create perimeter dilatations of vertical building elements (walls, pillars, pipes, etc.). The substrate must comply with the applicable regulations, standards or recommendations of the material manufacturer.
Preparation of the mixture
Prepare the material by pouring the dry mixture into the prescribed amount of water and mixing it. Use potable water or water complying with EN 1008 to mix the mixture. Mix using a slow speed propeller mixer. Mix to a homogeneous, lump-free mixture and leave to rest. Then mix again briefly. Use suitable machinery when processing by machine.
Water demand
| Quantity | Liters (Min) | Liters (Max) |
|---|---|---|
| 25 kg | 3.7 L | 4.3 L |
| 1 kg | 0.15 L | 0.17 L |
Mixing
Mixing time
5 min
Mixing speed in Rpm
800x/min
Ripe time
3 min
Processing instructions
Spread the mass on the prepared substrate and compact it, e.g. with the strokes of a trowel. Then flatten the surface with a lath and smooth it with a plastic or steel trowel. An advantage is the possibility of pulling down with a vibrating lath.
Application thickness
| Minimum layer thickness | 3 mm |
|---|---|
| Recommended layer thickness | 8 mm |
| Maximum layer thickness | 10 mm |
Consumption
Material consumption min.
1.85
Material consumption max.
-
Material consumption in measuring unit
kg/m²/mm
Yield
| Material consumption | at | unit | Yield |
|---|---|---|---|
| 25 kg | 8 | MM | 1.7 m² |
| 1,000 kg | 8 | MM | 67.6 m² |
Working time (potlife)
60 min
Walkability after
24 h
Treatment after application
Avoid the negative effects of sun, heat, humidity and draughts. Protect from frost and rain. Direct heating of the surface is prohibited. Keep the screed in a moist condition for 2-3 days.
Tool and cleaning instructions
Wash off tools with water immediately after finishing work. Clean dried residues mechanically.
Technical parameters
| Main binder | Grey cement |
| Flammability class | A1fl |
| Max. grain size | 0,7mm |
| Full load after | 28 d |
| Compressive strength 28 days in N/mm² | 25 N/mm² |
| Flexural strength 28 days in N/mm² | 5 N/mm² |
| Thermal conductivity λ in W/(m.K) | 1.2 |
| Dry bulk density in Kg/m³ | 1850 |
| Dry bulk density in Kg/m³ to | 2250 |
| Release of corrosive substances | CT |
Download
|
|