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Beyem Screed

Beyem Screed

Rapid drying mortar for screeds.

About this product

BEYEM SCREED is a normal setting, rapid drying  cement-based  mortar for bonded and unbonded screeds. Formulated with cement, selected aggregates and additives to improve mechanical strengths and control shrinkage. Indoor environment quality. Classified A+ class according to Dècret nº 2011-321 (France). Free of radionuclides.

Benefits
  • Rapid drying and hardening.
  • Fast commissioning. Set for foot traffic after 12 hours.
  • Ready to receive ceramic tiles after 24 hours.
  • Shrinkage compensated.
  • Easy to apply.
  • Suitable for laying heated screeds
  • Thickness from 10 mm to 80 mm.
  • Very low VOCs emissions.
  • For interior and exterior situations. 
  • Radiation-free certificate.
Use

Forming rapid drying screeds for fast commissioning. For bonding and unbonding screeds both in rehabilitation and new floors in interior and exterior situations, before installing ceramic tiles, natural stone, wood and other floor coverings.  

Substrates

BEYEM SCREED is suitable for:

  • Precast concrete/ concrete slabs  or concrete poured on site
  • Cementitious floors /cement based screeds
  • Other rehabilitation substrates
Preparation of substrates

For bonded screeds (10 to 35 mm thickness): substrates must be dry, solid and free of dust, loose and detached parts, paint, wax, oil, rust and all other pollutants. Hole,  leaks  and fissures in the substrate should be sealed. In case cracks or fissures are presented, they should be treated with a mortar from the BEYEM mortar for concrete repair range. Surface must be open pore, being convenient to ensure this fact the treatment of it. Apply special compressible band around the perimeter of the rooms to be laid and around any vertical elements which pass through the floor (such as pillars and columns). Before application of BEYEM SCREED it is necessary to apply a bonding layer using BEYEM SCREED mixed with 10% of  BEYEM ELASTIC diluted in water in a ratio 1:1. Spread BEYEM SCREED on this first layer while it is still fresh.

For unbonded screeds (35 to 80 mm thickness): The mortar must be laid on an isolating layer (polyethylene sheet barrier or similar) to allow for movement between the screed and the existing substrate. Apply special compressible band around the perimeter of the rooms to be laid and around any vertical elements which pass through the floor (such as pillars and columns). 

Instructions for use

Mix BEYEM SCREED at least 5 minutes with a normal job site mixer, low speed electric mixer, rotating mixer  or pump machine, with 2,25-2,75 l per bag of clean water.  The mix should have a semi-fry/mortar consistency. BEYEM SCREED must be tamp and spread using screed guides. Tamp thoroughly before floating to obtain a better surface finish. BEYEM SCREED is set for foot traffic in 12 hours. Wait 24 hours before laying of ceramic tiles and 48 hours for natural stone. After 48-96 hours BEYEM SCREED is ready for installing wood, resilient floorings and painting.

Drying times can vary depending on temperature and relative humidity , soi it is absolutely necessary to use  a carbide hygrometer  to measure the level of residual humidity before finishing with the  desired covering.

Cautions and recommendations
  • Do not apply below 5ºC or above 30ºC.
  • Protect unset mortar of the direct sunlight, frost or strong wind.
  • Do not use BEYEM SCREED on wet surfaces or on substrates which are subject to rising damp. In this case it is necessary to use an appropriate  waterproofing slurry.
  • Do not add aggregates,  additives or  other binders to the BEYEM SCREED  mix.
  • High humidity of the substrate and low temperatures  conditions prolong the setting time.
  • Excess of water reduces final mechanical strengths and quickness of setting.
  • In case of high temperature or/and low relative humidity, surface of BEYEM SCREED must  be protected to avoid  a rapid drying. Once the material has set, cure with a fine spray of clean water as long as possible.
  • Respect the expansion and structural  joints in the substrate and form distribution joints (surfaces  ≥ 20m2).
  • Areas of BEYEM SCREED  containing  pipes must  be reinforced  with light steel  reinforcement.
  • Forr laying heated screeds, apply the mortar mixed with 10% of  BEYEM ELASTIC diluted in water in a ratio 1:1.
  • Mix only sufficient material that can be applied  using available labor and equipment.
  • Time  before light foot traffic  and floor covering can vary depending on the layer thickness and drying conditions.  Check the substrate surface  before  overcoating.
Technical data

Product identity. Properties of mixture and application data

Appearance

Powder

Color

Grey

Bulk density

≈ 1590 Kg/m3

Density of the mix

≈ 2100 Kg/m3        (depending on compaction)

Grading

0-4 mm

Mixing water,% 

± 10 %

Pot life

≈ 60 min

Thickness for bonded screeds

10 - 35 mm

Thickness for unbonded screeds

35 - 80 mm

Coverage

1,8 Kg/m2  per mm of thickness

Tariff code

3824.50.90.00

Final performances

 

Type

CT C25 F6

Set to light foot traffic

≈ 12h

Time to overcoat

≈ 1-4 days  depending on the type of flooring covering

Compressive strength

≥ 25 N/mm2

24h / 7 days

≥ 8 N/mm2 / ≥ 16 N/mm2

Flexural strength

≥ 6,0  N/mm2

Total VOCs (28 days)

≤ 500 µg/m3

Radioactivity index  (U, Ra, Pb, Th, others)

I = 0,061

Packaging

BEYEM SCREED is packed 25 kg plastic lined paper bags.

Storage: when stored unopened in a cool dry place, shelf life is 12 months from date of manufacture.

Cleaning tools

Tools can be cleaned easily with water before the product hardens. Hardened product can be removed only mechanically.

Project specification

Forming rapid drying screeds for fast commissioning must be carried out with a COVs and radiation free, normal setting, rapid drying  cement-based  mortar for bonded and unbonded screeds compliant with EN 13813 – Class CT C25 F6 , such as Beyem Screed,  manufactured by Rodacal Beyem Company. Beyem Screed is especially suitable for rehabilitation and new floors, before installing ceramic tiles, natural stone, wood and other floor coverings. Apply  always over cleaned and stable substrates in a 10-35 mm of thickness for bonded screeds  and 35-80 mm of  thickness for unbonded screeds laid on an isolating layer (polyethylene sheet barrier or similar).

Health and Safety

For further and complete information about the safe use of our product please refer to our latest version of the Safety Data Sheet, which is available upon request.

Disposal of the product and packaging must be in accordance with current legislation. This is responsibility of the final product user.

Certifications

Technical Data Sheet

Safety Data Sheet

Declaration of Performance

Certificate of Factory Production Control

Declaración Compuestos Orgánicos Volátiles

Radiation-Free Certificate

Certificate of Quality Management System ISO 9001

Certificate of R+D+i Management System UNE 166002

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