HydroHeat
HYDROCEM 550 Fibre
Preparation of all common substrates, such as sand/cement screeds, concrete, sound asphalt,
calcium sulphate screeds, ceramic, quarry and natural stone tiles, underfloor heating, plywood
and timber boards to receive floor finishes.
OVERVIEW
HYDROCEM 550 FIBRE-REINFORCED LEVELLER is ideal for application over a wide range of substrates including concrete and sand/cement screeds. It can be applied at thicknesses from 5mm to 50mm in one application.
HYDROCEM setting and can receive a tiled floor finish after 3 hours or most other types of finish at 24 hours (at 20°C).
HYDROCEM 550 FIBRE is shrinkage compensated and contains fibre reinforcement providing the perfect smoothing material for most floor finishes.
OVERVIEW
– Can be applied from 5mm to 50mm in one pour.
– Single part, no additives required, just add water.
– Lightfoot traffic after 3 hours.
– Protein free.
– Shrinkage compensated.
– Pumpable.
– High durability.
– Suitable for underfloor heating.
TECHNICAL DATA
|
Packaging |
25kg lined paper sacks |
|
Water addition |
5.8- 6.0L per 25kg unit |
|
Working time |
20-30 minutes at 20°C |
|
Time to receive tiled floor finishes |
3 hours |
|
Time to receive resilient floor finishes * depending on porosity, nature of flooring |
24 hours (3mm application)* |
|
Application thickness |
5mm – 50mm in one application |
|
Consumption of powder per mm |
1.7kg/mm/m2 |
|
Compressive strength to BS EN 13892-2 |
1 day >15.0MPa 7 day >25.0MPa 28 days >35.0MPa |
|
Flexural strength to BS EN 13892-2 |
1 day >4.0MPa 7 day >6.0MPa 28 days >7.0MPa |
COVERAGE
| Applied thickness | No. of bags required per 100m2 | |
|---|---|---|
|
3mm |
21 |
|
|
6mm |
41 |
|
|
12mm |
82 |
|
|
30mm |
204 |
|
COVERAGE
The application of Hydrocem Fibre 550 should only be carried out when the floor temperature is 5 – 30°C and the ambient relative humidity is below 75%. These conditions should be maintained
during application and drying. Do not use in areas subject to permanent water immersion.
COVERAGE
Whilst the information provided in this datasheet is true and accurate to the best of our knowledge, it may contain information which is unsuitable under certain circumstances since materials, site conditions and method of application vary with each application. HydroHeat Underfloor Heating LTD cannot be held be responsible for any loss or damage due to incorrect use or from the possibility of variations in working conditions and/or workmanship beyond our control. The user alone is responsible for any consequences deriving from the product.
HEALTH & SAFETY
This product is not classified under the Chemicals Hazard Information and Packaging for Supply Regulations. A Material Safety Data Sheet relating to this product can be obtained from HYDROCEM LTD. Please dispose of packaging and waste responsibly.
STORAGE & SHELF LIFE
Six months in unopened bags and stored under good, cool and dry conditions.
TOOLS REQUIRED
– Steel trowel
– Spiked roller
– Mixing bucket, slow speed drill and paddle (small projects)
– Mixer / pump (high volume applications
Wash all tools thoroughly with water directly
after use.
SURFACE PREPARATION
Before starting, all substrates must be clean, dry and strong enough to support the weight of the leveller, adhesive and the final covering being applied. Remove all dust, dirt, laitance, oil, grease and other contaminants that may affect adhesion. Where traces of adhesive remain, these must be strong, sound and well adhered to the surface. Sub-floors directly to earth must have a DPM.
SUBSTRATES
Concrete/screed:
Ensure that new concrete is confirmed dry via consistent moisture readings across the whole surface. Sand/cement screeds must have a surface relative humidity reading of less than 75% RH before work can commence. If it is a new screed, allow 1 day per mm for drying. Remove any laitance from the surface mechanically and remove all dust and debris, ideally by vacuum.
It is necessary to prime sand/cement screeds to aid adhesion, maintain workability and prevent air bubbles rising to the surface. Prime with HYDROPRIME diluted 3 parts water to 1 part neat HYDROPRIME. Very porous substrates will require more than one coat.
Asphalt/ceramic/quarry/stone tiles:
Make sure surface is clean and free of loose dirt and dust. Prime the surface with HYDROPRIME diluted 1 part water to 1 part neat HYDROPRIME mixed with a little cement and sand to form a brush on bonding slurry.
Plywood/chipboard/floorboards:
Plywood (12mm minimum) and chipboard (18mm minimum), must be exterior grade and screwed (not nailed) to the substrate at 6 inch/150mm centres. Existing tongue and groove boards should also be screwed down to the joists at 6 inch/150mm centres. Existing tongue and groove boards should also be screwed down to the joists at 6 inch/150mm centres.
Ensure there is sufficient ventilation beneath the substrate and that the substrate is strong enough to support the weight of the leveller, adhesive and the final covering being applied.
Make sure the surface is free of loose dirt and dust. Prime plywood with HYDROPRIME diluted 3 parts water to 1 part neat HYDROPRIME, Prime chipboard with HYDROPRIME diluted 2 parts water to 1 part neat HYDROPRIME and prime floorboards and any exposed edges and joints with neat HYDROPRIME.
Calcium sulphate screed:
Ensure that the calcium sulphate screed is confirmed dry via consistent moisture readings across the whole surface. Calcium sulphate screeds must have a surface relative humidity reading of less than 75% RH before work can commence. If it is a new screed, allow 1 day per mm for drying for depths up to 40mm and 2 days per mm thereafter.
Remove any laitance from the surface mechanically and remove all dust and debris,
ideally by vacuum.
Calcium sulphate screeds must be sealed prior to applying Hydrocem 550 Fibre by applying one coat of Hydroprime A diluted 3 parts water to 1 part neat Hydroprime A and allow to dry, followed by a second coat of
neat Hydroprime A.
Underfloor heating:
Warm water UFH system – The system must have been fully commissioned, brought up to the maximum temperature and ideally switched off 48 hours before application. In the absence of other heat sources, the UFH may be set to ‘cut back’ to achieve an air temperature of 15°C. Any expansion or
movement joints must be carried through to the floor covering surface.
Radiant electrical UFH system – HYDROCEM 550 FIBRE can also be used over electrical UFH systems where cables are fitted to a sound, strong, mechanically-fixed cement backer board. Apply HYDROPRIME diluted at 3 parts clean water to 1 part HYDROPRIME and allow to dry fully. HYDROCEM 550 FIBRE may also be used where electrical UFH is used over
cementitious subfloors. Priming should be as per the substrate. In all cases HYDROCEM 550 FIBRE must be applied at a thickness of 5mm above the cables for resilient, textile and timber applications and a minimum of 3mm for application of stone, ceramic or porcelain products.
Power floated concrete:
Ensure the surface has been allowed 7 days to cure. Power floated concrete can leave a loose top layer and/or laitance once it has cured. Remove the loose top layer and any laitance from the surface mechanically and remove all dust and debris ideally by vacuum. Once all laitance and/or loose material has been removed, prime the surface with HYDROPRIME diluted 3 parts water to 1 part neat HYDROPRIME.
MIXING BY HAND
Slowly mix 25kg of HYDROCEM 550 FIBRE powder to 5.8 litres of water. Add the powder slowly to avoid clumping. Continue to mix until a uniform consistency is achieved. Do not exceed the suggested water addition as this will adversely affect strength, surface finish and will extend drying and overlaying times.
When the desired consistency is obtained allow to stand for 2 mins before remixing prior to application. Ensure that each mix is used within 30 mins of first mixing.
MIXING BY PUMP
Mix in accordance with the pump manufacturer’s recommendations. The rate of water addition should be adjusted to give a smooth, cohesive mix with no surface bleed or segregation. Carry out flow checks at regular intervals during pumping.
MIXING BY PUMP
Apply by pouring or pumping to the desired thickness and trowel finish to a maximum of 75mm. If greater thickness is required allow to dry between layers of not more than 75mm. HYDROCEM 550 FIBRE will begin curing in 1 to 2 hours and should be “walkable” after approximately 3 hours at 20°C. These times may be decreased by higher temperatures or increased if colder.
HYDROCEM 550 FIBRE must be suitably dry before overlaying with floor finishes. Typically this will be after 3 hours for tiles or 24 hours for most other floor finishes. It is the responsibility of the floor finishes applicator to ensure that the residual moisture in the material is suitable.