Fast track self-levelling screed
abescreed SLC P 25 is a single pack, rapid hardening cement based screed for levelling floors where quick setting is essential. abescreed SLC P 25 can be hand applied by trowel (0 – 20 mm) or can be pumped (4 – 20 mm). For pumped applications, an 8 mm average thickness would be a typical expectation on a reasonably level base.
Uses
For fast track refurbishment and new construction where finishes such as carpets, ceramic tiles, vinyl, wood block or cork need to be applied quickly.
Used for smoothing floors in office buildings, dwellings, shops, public buildings, schools, hospitals and airports where a fast track, smooth underlay is required for the above finishes.
Advantages
- Dustless
- Quick setting
- Self-levelling
- Can be pumped up to 2 000 m² per day, under suitable conditions
- Walk on after 16 hours / next day @ 25 °C under normal conditions
- Can normally apply coverings onto a 10 mm thick screed after 24 hours and a 5 mm screed after 12 hours
- Pumpable or hand laid
- Single pack just add water
- Protein free, will not harbour bacteria
Surface Preparation
The base slab or screed should be sound with a minimum thickness of 40 mm and with a minimum compressive strength of 25 MPa and a minimum of 1.5 MPa tensile adhesion strength. All surfaces must be clean, mechanically sound and free of laitance, dust, grease and oil. Vacuum abrasive blast cleaning is the preferred method of surface preparation. Wet grinding followed by vacuuming may also be used.
Refer to the “Method statement abescreed SLC P” for the “Surface Preparation”.
Bonding / Priming
Concrete surfaces should be primed with abeprime SLC acrylic primer. Apply the abeprime SLC acrylic primer (refer to data sheet for additional information ) onto the floor surface by means of a brush or roller and leave it to dry before applying abescreed SLC P 25.
Product code abeprime SLC acrylic primer 5ℓ: 50105-005
Priming improves the adhesion of the abescreed SLC P 25 to concrete, prevents formation of air bubbles and reduces water absorption into the sub floor.
For information on how to prepare impermeable concrete bases or floors other than concrete floors, contact a.b.e.®’s technical service department.
| TYPICAL PHYSICAL PROPERTIES | |
| Compressive strength @ 28 days (N/mm²) | 25 MPa (typical) |
| Flexural strength @ 28 days (N/mm²) | 9 MPa (typical) |
| Adhesion to concrete @ 28 days (N/mm²) | >1 |
| Maximum particle size (mm) | 0.5 |
| Protein content | Nil |
| Pumped thickness (mm) | 4 – 20 |
| Hand applied thickness (mm) | 0 – 20 |
| Application temperature (°C) | 5*1 – 25 |
| Working time @ 20 °C (minutes) | 20 |
| Walk on time @ 25 °C (hours) | 4 |
| Overcoating time @ 20 ° C, 50 % RH and 10 mm thick (hours) |
24 |
| Flow ring 30 mm dia x 50 mm high | Target 160 – 190 |
*1 Application at low temperatures will result in extended set times and slow strength gain.
Mixing
Coverage (Powder)
Application
Refer to the “Method statement abescreed SLC P” for the application process.
Pump or pour the mix over the concrete surface. For pumped application, ensure the continuity of electricity and water supplied is secured. Pump or pour the abescreed SLC P 25 onto the floor in a continuous operation, feeding fresh material into a wet edge.
abescreed SLC P 25 will level out to a smooth, even finish. Where necessary, release small air bubbles from the newly laid screed with a trowel, spiked roller or a tee-bar. This practice must be adopted within 5 minutes of application to avoid interfering with the final levelling properties.
Any lumps found in the product are to be removed before placing the product.
Cleaning of Equipment
Tools, brushes and mixing equipment should be cleaned with water immediately after use and before material has set. Hardened material can only be removed by mechanical means.
Protection on Completion
Ensure the abescreed SLC P 25 is not subject to draughts during the first 24 hours of curing as this may lead to cracking and crazing. Tape up doorways with polythene if necessary to prevent air movement during application.
Subsequently ensure the room has sufficient ventilation to allow the screed to dry. Ensure adequate protection from other trades and traffic after installation, this includes the primer which must be free of dirt and dust before applying the screed, prevent contamination by following trades e.g. plastering, including water spillage.
Hardening and Drying Times
abescreed SLC P 25 may be walked on after 16 hours / next day @ 25 °C, and may be sanded at joints if required 24 hours after application. The floor covering can be installed after 24 hours, depending on the type of finish, density and dryness of abescreed SLC P 25 screed and ambient conditions.
Before installation of floor coverings, the requirements for critical moisture contents for particular floor coverings have to be observed.
Temperature and Relative Humidity
Internal air and floor temperatures must exceed + 5 °C. The RH of the concrete floor must not exceed 95%, but where moisture sensitive floor coverings are to be laid soon after abescreed SLC P 25 application, the RH of the base must be in accordance with the relevant floor overlay manufacturers specification.
Model Specification
abescreed SLC P 25 single component, cement based screed for levelling floors. Supplied and laid on a suitable sound laitance free and vacuum cleaned concrete or screed base primed with abeprime SLC acrylic primer.
- Minimum thickness: Feather edge by hand or 4 mm by pump
- Maximum thickness: 20 mm To be mixed and laid in accordance with the instructions of a.b.e.®
Packaging
abescreed SLC P 25 is supplied in 20 kg polyethylene lined paper bags.
abeprime SLC acrylic primer is supplied in 1 ℓ, 5 ℓ and 25 ℓ.
Handling and Storage
This product has a shelf-life of 12 months if kept in a dry cool place in the original packaging. In more extreme conditions this period might be shortened.
Health and Safety
Product safety information required for safe use is not included. Before handling, read product and safety data sheets and container labels for safe use, physical and health hazard information. The safety data sheet is available from your local a.b.e.® sales representative.
Important Note
This data sheet is issued as a guide to the use of the product(s) concerned. Whilst a.b.e.® endeavours to ensure that any advice, recommendation, specification or information is accurate and correct, the company cannot accept any liability for application – because a.b.e.® has no direct or continuous control over where and how a.b.e.® products are applied.
Further Information
Where other products are to be used in conjunction with this material, the relevant technical data sheets should be consulted to determine total requirements.
a.b.e.® has a wealth of technical and practical experience built up over the years in the company’s pursuit of excellence in building and construction technology.
Please consult our website for our latest datasheets.
Helical Stirrer
