Product Data Sheet Show all documents
SikaScreed® P-24

SikaScreed® P-24

Rapid hardening ternary cement binder
for rapid hardening floor screeds

SikaScreed® P-24 is a ternary cement binder for the production of low-shrinkage cement screeds for rapid use and covering.

  • Full crystalline water binding
  • Extremely low shrinkage for fast covering, even with rigid flooring systems
  • Rapidly open to pedestrian traffic – after about 5 hours at +20°C
  • Ready for covering after 24 hours with all types of flooring
  • Pot life of at least 100 minutes at +20°C
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Product Data Sheet Show all documents

Usage

Suitable for heated and unheated screeds that are laid bonded or unbounded, over insulation or monolithically for interior use, with the capability for pedestrian traffic after 5 hours and covering after 24 hours, with all types of flooring.  

Advantages

  • Full crystalline water binding
  • Extremely low shrinkage for fast covering, even with rigid flooring systems
  • Rapidly open to pedestrian traffic – after about 5 hours at +20°C
  • Ready for covering after 24 hours with all types of flooring
  • Pot life of at least 100 minutes at +20°C

Packaging

25 kg bags, 40 bags per pallet

Colour

brownish-grey

Product Details

Sustainability / Certifications / Approvals

ENVIRONMENTAL INFORMATION

  • EMICODE EC1PLUS, tested at Eurofins, report G22338B_03 and G22338B_04

APPROVALS / STANDARDS

  • Fire class A1, tested at MA 39, report VFA 2009-1114.2, November 2011
Product Information

Chemical Base

Special ternary cement binder
Important Note: Do not mix with other binders!

Shelf Life

9 months from date of production

Storage Conditions

store properly in undamaged, unopened and original sealed packaging, in dry conditions at between +5°C and +25°C.
Opened packaging should be resealed immediately.

Bulk Density

~ 0.9 kg/litre
Technical Information

Compressive Strength

The strength development corresponds to a CT-C20-F4 after 24 hours.
Final strength: Minimum to CT-C30-F5 (depending on sand quality)

 

Application

Application Information

Layer Thickness

for 25 mm up to 90 mm screeds

Ambient Air Temperature

0°C min. / +30°C max.

Substrate Temperature

+5°C min. / +30°C max.

Pot Life

~ 100 minutes at +20°C

Lower temperatures extend the pot life and higher temperatures will shorten it.

Waiting Time / Overcoating

pedestrian traffic after

~ 5 hours

covering after

~ 24 hours with all flooring types*

* If the specified mixing ratio is adhered to, the screed is ready for covering / overlaying after 24 hours at +20°C. A CM measurement should be taken to determine its readiness.

ready for covering or overlaying / temperature

CM content

after 24 hours / at 20°C

< 2.2 CM %

after 24 hours / at 10°C

< 2.5 CM %

after 48 hours / at 20°C< 2.0 CM %
after 72 hours / at 20°C< 1.7 CM %

CM-measurement with cross-section sample (batch weight 50 g) after shaking for 2 minutes at the start and 1 minute shaking after 5 minutes. CM value taken after 10 minutes.

When the screed is ready, it should be covered immediately to prevent re-wetting due to building moisture or cooling below dew point.

For monolithic structures, wait until the substrate has also dried out.

Heated screeds can start to be heated after 2 days (at +20°C room and material temperature) at a flow temperature of +25°C. The flow temperature can be raised to the maximum temperature after another 3 days. After 3 more days at maximum temperature, reduce the flow temperature and lay over the screed immediately at +15°C minimum.

Screeds with SikaScreed® P-24 are heat resistant to +50°C.
Consumption

Consumption

~ 350 kg/m³ screed mortar (at 90 mm layer thickness)
Application steps

MIXING

Keep screed mixes with SikaScreed® P-24 as cool as possible, and use cold tap water for gauging. Pre-cool this when appropriate.
Place half the quantity of damp sand in the screed pump or paddle mixer, add all of the SikaScreed® P-24 and half of the water, premix briefly and then add the remaining sand and water until the required consistency is obtained.
The mixing time should be at least 2 minutes.

 

Mixing ratio for standard commercial screed pumps (220 litres):

  • 50 kg SikaScreed® P-24 (2 bags)
  • 250 kg screed sand 0 - 8 mm (3/4 filled pump) = approx. 33 shovels
  • 22 litres total water (sand moisture content to be taken into account and included)
  • w/c ratio 0.45 maximum

Note: A standard screed pump holds about 320 kg of sand and therefore should only be 70 % filled with this mix.

APPLICATION

The prepared surfaces must not be larger than can be completed during the pot life of the binder and the screed mix produced.
The semi-dry to stiff-plastic screeding mortar is applied using a rake, batten and suitable finishing trowels.

CLEANING OF TOOLS

Clean containers, tools etc. with water during the pot life. After hardening, cleaning is only possible mechanically.

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