Fine spreaded coating for repairs of concrete surface

Product Characteristics
One-component dry spreaded coating containing redispersable polymers. Meets the requirements of class R3 according to EN 1504-3.

  • designed for concrete repair (principle 3, 4 and 7 method 3.1, 3.2, 3.3, 4.4, 7.1 and 7.2 according to EN 1504-3)
  • mixed with water only
  • good workability
  • perfect adhesion to base
  • permanently water-resistant and frost-resistant
  • good mechanical properties
  • compensated in volume
  • as required by Act No. 258/2000 Coll. and Ministry of Health Decree No. 38/200 Coll. is eligible for direct contact with food

DENSOFIX is one-component dry mortar mix intended especially for repairs and sealing of damaged and repaired concrete and reinforced concrete surfaces. Spreaded coating DENSOFIX can be coated with any type of secondary protection in dependence on exposure of the repaired structure.

Physical and mechanical parameters

Requirements / results according to EN 1504-3 class R3

Testing method R3 Requirements Results
Compressive strength (MPa) EN 12190 >25 R3
Chloride Ion Content EN 1015-7 <0.05% <0.01%
Adhesive Bond (MPa) EN 1542 >1.5 >1.5
Carbonation Resistance EN 13295 dk ≤ control concrete complies
Bound contraction-expansion (MPa) EN 12617-4 Adhesion after test >1.5 >1.5
Elastic Modulus (GPa) EN 13415 Adhesion after test >1.5 >1.5

Physical and mechanical parameters

Colour Non-standard yellow
Bulk density (kg/m3) 1520 ± 40
Bulk density of fresh spreaded coating (kg/m3) 2070 ± 40
Tensile bending strength (MPa) 7 days >3.0
28 days >5.5
Compressive strength (MPa) 7 days >16
28 days >25
Dynamic E-module (GPa) <25
Thermal expansion coefficient (K-1) 12.5 ± 0.4.10-6
Frost resistance >T150
Adhesion to base (MPa) >1.5

Test certificates
Meets the requirements of EN 1504-3, TP ŘSD Sec. 31 and TP SSBK III.
Initial tests types according to EN 1504-3, Protocol No. 1301-CPD-0295 issued by TSÚS Bratislava. Supervision of the quality system, EMS and OHSAS is carried out by Notified Body No. 1020
The product has been approved as required by Act no. 258/2000 Coll. and Ministry of Health Decree No. 38/2000 Coll. as eligible for direct contact with food

Instruction for preparation and application.
During the processing of dry mortar mixes DENSOFIX it is generally necessary to comply with the principles contained in the relevant technological process BETOSAN for repair of reinforced concrete structures (TP No.1/06).

Base Any incoherent, loose or weatherworn particles and dust shall be completely removed from the surface of the repaired base. The concrete surface cannot be contaminated by substances negatively affecting adhesion to the base (fats, greases, oils, etc.). Rinsing with pressure water is the best method for necessary complete removal of any dust from the entire repaired surface before applica-tion.

Preparation of the spread. The spreaded coating is prepared by simple mixing with water. The recommended mixing ratio is as follows:

Dry component (kg) Water (litres) Thickness of applied layer (mm)
DENSOFIX 25 5.00 ÷ 5.75 min. 2 max. 4

Workability of the product is 50 – 60 minutes under 20 °C
Neither temperature of base nor temperature of ambient air shall be below + 5 °C and above + 30 °C.

DENSOFIX spreaded coating is applied either mechanically or manually. Manual application means finning off. The spreaded coating is applied in one layer whose thickness should not exceed value specified in the above table. Surfaces coated with the spreaded coating shall be efficiently protected against direct sunshine and wind.

Surface finalization. After initial setting of the spreaded coating smoothing by a dry polyurethane or polystyrene finisher is used for surfacing.

Surface treatment. Repaired surfaces shall be properly treated immediately after completion to avoid especially direct exposure to sun, wind effect and other factors accelerating undesirable evaporation
of the batch water. Use of the following treatment agents DENSOCURE W and DENSOCURE R proved well. It is desirable to properly moisten the repaired places several times a day for min. 7 days following the repair.

Specific consumption
Specific consumption of dry mortar is 1.6 to 1.7 kg/m2 at 1 mm of layer thickness.

More info on the product page
DENSOFIX (ENG) (pdf, 0.3 MB)