Beyem R4 T

One-component, thixotropic, low shrinkage and high strength mortar for concrete repair.

BEYEM R4 T is a one-component, thixotropic, low shrinkage and high strength mortar for concrete repair. Formulated with special cements, selected aggregates, organic additives and resins to improve adhesion and mechanical strengths. Fiber-reinforced. Specially suitable for  concrete repair works.

  • Class R4.
  • Modified polymer mortar (PCC).
  • High mechanical strengths.
  • High adhesion.
  • Thixotropic.
  • Free of chlorides and organic fibers.
  • Very low shrinkage behaviour.
  • High modulus of elasticity.
  • Suitable for pump machines and manual applications.
  • Both internal and external use. Surface ready to paint.
  • Superior workability.  

Regeneration and repair of structural and non-structural elements. Repair of precast concrete elements.  Re-establishing structural integrity of concrete. Joint filling between concrete sections, prefabricated elements and expansion joints. Repairs of structural elements such as columns, bridge girders, water treatment plants, tunnels, pillars with large load transfer…

Restoration work (Principle 3 , method 3.1 and 3.3 of EN 1504-9 ). Repair of spalling and damaged concrete in buildings, bridges,  infrastructure and superstructure works.

Structural strengthening  (Principle 4 , method 4.4 of EN 1504-9 ). Increasing the bearing capacity of the concrete structure  by adding mortar.

Preserving or restoring passivity (Principle 7, method 7.1 and 7.2 of EN 1504-9). Increasing cover with additional mortar and replacing  contaminated or carbonated.

BEYEM R4 T is suitable for:

  • Concrete
  • Precast concrete  elements

Concrete must be free from dust, loose material, surface contamination and materials which reduce  bond or prevent suction or wetting  by repair materials. Steel reinforcements must be free of rust, grease, oil and other adhesion impairing contaminants (Sa21/2 degree). Where necessary, concrete  must be cleaned by sandblasting, high pressure water jetting or other approved mechanical methods that do not cause vibration or impact, to leave a clean and keyed surface. Rusty exposed reinforcement must be cleaned by    metal brushing or sandblasting. Absorbent substrates should be previously wetted until they are saturated, preventing waterlogging, and applying the mortar  once the surface has a matt appearance.

Smooth, slightly absorbent or very damaged substrates should be treated to obtain a surface with minimum guarantees of roughness and tensile strength. Minimum roughness of at least 5 mm. For more information regarding substrate preparation, refer to the recommendations provided in EN 1504-10.

Mix manually of mechanically BEYEM R4 T with ≈ 3,3 l per bag of clean water until a homogeneous, and  and lump-free paste  is obtained.  BEYEM R4 T can be applied either manually using traditional techniques or mechanically using wet spray equipment in thicknesses not less than 5 mm and not more than 40 mm per layer, respecting the correct application techniques.

Press the repair mortar with a trowel onto the substrate. Finishing for both hand and machine application can be done with the same trowel or float as soon as the mortar has started to stiffen. 

  • Do not apply below 5ºC or above 30ºC.
  • Do not apply when there is risk of frost, rain, strong wind or direct sunlight.
  • Do not add water in excess of the recommended dosage .
  • Protect the mortar applied of early dehydration, using suitable  curing methods. The curing operation in humid environment is essential for at least 24 hours after application.
  • Do not apply on gypsum, metal or wood.
  • Mix only sufficient material that can be applied  using available labour and equipment.

Product identity. Properties of mixture and application data






0-2 mm

Density of the mix

≈ 2200 Kg/m3

Pot life

≈ 35 min

Mixing water,% 

± 13 %

Minimum layer thickness

5 mm

Maximum layer thickness

40 mm


18 Kg/m2  per cm of thickness

Tariff code


Final performances





≥ 2,0 MPa

Compressive strength

≥ 45,0 MPa 

Flexural strength

≥ 8,0 MPa 

Chloride ion content

 0,05 %

Capillary absorption

≤ 0,5 kg/m2 h1/2

Elastic modulus

 20 GPa

Thermal compatibility. Part 1

 2,0 MPa

Carbonation resistance

dk ≤ reference  concrete MC (0,45)

Crack tendency – Coutinho  ring

no cracking after 180 days

Reaction to fire

Euroclass A1

BEYEM R4 T 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.

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

Regeneration, regularization and repair of concrete structures must be carried out with  one-component, thixotropic, low shrinkage , fiber-reinforced and  high strength mortar for concrete repair compliant with EN 1504-3 – Class R4 and according to Principle 3, method 3.1 and 3.3, Principle 4, method 4.4 and Principle 7 methods 7.1 and 7.2 of the EN 1504-9, such as Beyem R4 T, manufactured by Rodacal Beyem Company. Coverage will be  ≈ 18 kg / m2 per cm of thickness.

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.


Technical sheet

Component Safety Data Sheet

Declaration of benefits

Factory Production Control Certificate

Certificado Sistema Gestión de Calidad ISO 9001

Certificado Sistema Gestión de la I+D+i UNE 166002


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