CORED® Reducer 48

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CORED® REDUCER 48

Increases the thermal conductivity of cement screeds on underfloor heating by approx. 30-60 % to a lambda value of up to 2.4 W/mK. This means that heating costs can be reduced by approx. 5-10 % during operation. Your solution for lower CO2 emissions. At the same time, a CT-C30-F5 with only 50 kg instead of 62.5 kg is achieved, which means that the amount of cement can be reduced by 20 % and CO2 emissions by up to 48 % by switching from CEM I to CEM II cement.

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  • Compressive and flexural strength

    up to CT-C35-F5

  • Foot traffic

    after 1 day

  • Normal site traffic

    after 7 days

  • Commisioning UFH

    after 14 days

  • Minimum nominal thickness 2 kN/m²

    from 35 mm

  • Surface strength

    ≥ 1,0 N/mm²

  • Shrinkage

    SW 2

  • Energy efficiency class

    up to EC 2
  • Reduction in heating costs: 5-10 %
  • Cement reduction: 20 %
  • CO2 reduction: up to 48 %
DOSAGE & CEMENT QUANTITY
MIXING INSTRUCTIONS
Notes
POINT LOADS INFORMATIONS
AREAS OF APPLICATION
Downloads

DOSAGE

Compressive strengthCT-C30-F5CT-C35-F5 
Dosage350 ml350 ml
Cement quantity50 kg62,5 kg 
Foot trafficafter 2 daysafter 1 day
Site trafficafter 10 daysafter 7 days
  • A cement content of 62.5 kg additionally improves the thermal conductivity compared to the mixture with 50 kg.
  • Do not exceed the maximum dosage of 500 ml.
  • The strength class depends on the quality of the screed gravel used.
  • The specification "after the X. Day" does not include the day of installation.
  • The specifications refer to a standard mixing vessel with a net capacity of 200 litres and a filling quantity of approx. 320 kg of screed gravel.

MIXING INSTRUCTIONS

  1. Shake the container well to mix the Retanol® additive to a consistent colour before use, and then shake as required throughout the installation to maintain the consistency of the liquid (every 30 min).
  2. Fill half of mixing vessel with 0-4 mm screeding sand and required cement.
  3. Add Cored® Reducer 48 to the first mixing water (usually 5-10 litres), then fill the machine completely.
  4. Gradually add the required amount of residual water until a stiff-plastic consistency is achieved.
  5. Let the screed mix for a full 2 minutes.

SAND, WATER, CEMENT

  • Grading curve: Sand must be according to DIN 1045-2 A/B /BS 13139*, for the production of screed concrete, grain size range 0-4 mm
  • W/C value:Min 0,4, max. 0,6
  • Cement: Use of cement according to the PCT cement release list
  • CO2 savings through cement selection:
    • CEM I-Cement: Reduces CO2 emissions by approx. 20 % compared to a standard mix with CEM I
    • CEM II-Cement: Reduces CO2 emissions by approx. 48 % compared to a standard mix with CEM I 

*UK only

PROCESSING INSTRUCTIONS

  • Working time: 60 minutes
  • Finishing time: 90 minutes
  • Outside temperature: +5 °C to +28 °C for screed, environment and substrate
  • Do not mix with other screed additives
  • Never reactivate screed that has already set with water

Airing

  • If the air humidity is 55 % or higher, ventilate 3-4 times a day for 20-30 minutes 24 hours after screed installation in order to achieve readiness for covering.
  • If the humidity is below 55%, contact PCT technical support to avoid cupping etc.

FURTHER PRODUCT FEATURES

  • Tension and shrinkage reduced according to SW 2
  • Density approx. 2,000 to 2,200 kg/m3
  • Thermal conductivity approx. 1.5-2.4 lambda
  • Better processing and lower peel resistance
  • Reduction of air content
  • Start ventilation after 1 day

Protective instructions during and after installation

  • We recommend our PROTEC-ES/SP product to protect against drying out too quickly, depending on the floor covering. We recommend consulting the PCT technical support team.
  • Protect the screed against rapid drying of the surface due to draughts, sunlight and low humidity.
  • Large window fronts and floor-level glass façade areas should be darkened if necessary.
  • Cover screeds in outdoor areas or enclose areas to be covered. Contact PCT technical support if screed is to be laid outdoors.

CM MEASUREMENT

  • A screed with Cored® Reducer 48 does not have a defined readiness for covering and is therefore assessed with regard to its residual moisture in accordance with the measurement and assessment standards of BS 8204.
  • In this case, PCT Chemie and the Retanol® specialist company assume no responsibility for the readiness for covering.
  • The CM measurement is therefore part of the floor layer's inspection obligation and is carried out by him.

POINT LOADS INFORMATIONS

Area load
Point load		2,0 kN/m2
1,0 kN		3,0 kN/m2
2,0 kN		4,0 kN/m2
3,0 kN		5,0 kN/m2
4,0 kN		7,5 kN/m2
6,0 kN		10,0 kN/m2
8,0 kN
Flexuale strength ≥ F535 mm45 mm50 mm55 mm75 mm90 mm
  • Specifications, unless otherwise defined, as minimum nominal thickness (without UFH) or minimum pipe cover (with UFH).

AREAS OF APPLICATION

  • For all screeds according to DIN 18560, part 1–7, BS 13892*/ BS 8204*
  • Particularly suitable for:
    • Heating screeds in accordance with DIN 18560, part 2 / BS 8204*
    • Reduction of cement quantities and CO2 emissions
  • Screed suitable for indoor and outdoor areas as well as in permanently wet areas

*UK only

Product data sheet

Winter rules

DOSAGE & CEMENT QUANTITY

DOSAGE

Compressive strengthCT-C30-F5CT-C35-F5 
Dosage350 ml350 ml
Cement quantity50 kg62,5 kg 
Foot trafficafter 2 daysafter 1 day
Site trafficafter 10 daysafter 7 days
  • A cement content of 62.5 kg additionally improves the thermal conductivity compared to the mixture with 50 kg.
  • Do not exceed the maximum dosage of 500 ml.
  • The strength class depends on the quality of the screed gravel used.
  • The specification "after the X. Day" does not include the day of installation.
  • The specifications refer to a standard mixing vessel with a net capacity of 200 litres and a filling quantity of approx. 320 kg of screed gravel.
MIXING INSTRUCTIONS
Notes
POINT LOADS INFORMATIONS
AREAS OF APPLICATION
Downloads