5290
ANHYDRITE SCREED 25MPa

Formerly 090

Hassle free screed laying

Self-leveling screed properly processed makes leveling compound unnecessary.

  • Calcium sulfate screed for creating floating and bonded indoor screeds.
  • Self-levelling: easy to use.
  • Shrinking- and crack-free.
  • High thermal conductivity: particularly well suited for underfloor heating systems, without using additional reinforcement.
  • For application thicknesses over 35 mm to be covered with tiles, parquet, laminates, PVC, carpets, etc.
  • 25MPa: For moderately loaded areas in residential and office premises

Area of application

  • Indoor: floor

Heating and cooling area

  • Floor

Processing method

  • For hand and machine processing
  • For the construction of floors with or without underfloor heating with high load requirements in the interior (in the construction of apartments, offices, administrative buildings, hotels, schools, etc.).
  • Creation of floating and combined (connected) screeds for laying floor coverings (tiles, parquet, floating floors, PVC, carpets, etc.).

Price list

Packaging type

Packaging material

Code

Packaging

Packaging type

Sack

Packaging material

PE

Code

BC0 090 25 40 00VN

Packaging

25 kg

Packaging type

Silo

Packaging material

No packaging

Code

BC0 090 00 40 00VN

Packaging

1,000 kg

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

A bonded layer: Before applying the screed to the old concrete, the substrate must be moistened and treated with Cemix primer 5400.
Floating layer: Separate the substrate with a suitable separation layer e.g. PE 0.2mm. Thermal and acoustic insulators must be stacked together without gaps. Working or structural joints must be respected and must be created perimeter dilatation 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

Pour the dry mixture into the prescribed amount of water and mix with a slow-speed mixer. Stir to a homogeneous mixture without lumps and leave to rest. Then mix again briefly. Use suitable machinery, e.g. SMP FE 100, for machine processing.

Water demand

CEMIX_blue_handling_water-quantity_25kg_3,75-4,25l
Quantity Liters (Min) Liters (Max)
25 kg 3.7 L 4.3 L
1 kg 0.15 L 0.17 L

Mixing

CEMIX_blue_handling_swirl_5min800x CEMIX_blue_handling_rest_3min
Mixing time
5 min
Mixing speed in Rpm
800x/min
Ripe time
3 min

Processing instructions

Before application, check the spread rate using the Hägermann-Trichter method, which should be 230-250 mm. Pour the mixed mixture in a single layer to the desired height. Afterwards level and aerate using vibrating lats. In narrow profiles (e.g. door between rooms) or in rooms where the aspect ratio is greater than 1 : 3, expansion joints must be made. If a very smooth surface is required (under cork, PVC, etc.), sand and re-grout the floor with a fine self-levelling trowel 1-3 mm thick.

Application thickness

CEMIX_blue_techdata_100_15mm
Minimum layer thickness 15 mm
Recommended layer thickness 45 mm
Maximum layer thickness 100 mm

Consumption

CEMIX_blue_techdata_trowel_1,8kg-1mm
Material consumption min.
1.8
Material consumption max.
-
Material consumption in measuring unit
kg/m²/mm

Yield

Material consumption at unit Yield
25 kg 35 MM 0.4
1,000 kg 35 MM 19.9

Working time (potlife)

CEMIX_blue_handling_trowel_60min

60 min

Walkability after

CEMIX_blue_handling_trespass_24h

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 Gypsum
Flammability class A1fl
Max. grain size 4mm
Full load after 7 d
Compressive strength 28 days in N/mm² 25 N/mm²
Flexural strength 28 days in N/mm² 6 N/mm²
Thermal conductivity λ in W/(m.K) 1.25
Dry bulk density in Kg/m³ 1900
Dry bulk density in Kg/m³ to 2200
Wet density in Kg/m³ from 1900
Release of corrosive substances CA

Download

Technical datasheet
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