Waterproofing thixotropic mortar with XYPEX ADMIX C 1000 admixture

Product Characteristics
A single-component dry mortar expansible mix containing expansive and sealing Single-component dry (thixotropic) mortar mix containing sealing admixtures XYPEX ADMIX C 1000. Meets the requirements of Annex ZA of EN 14891

  • applied manually or by dry spraying
  • perfect adhesion to base, good mechanical properties
  • compensated in volume
  • permanently water-resistant
  • is waterproof (up to 120 m water pressure)
  • freeze-thaw resistant
  • high chemical resistance
  • seals the concrete surface to water, oils, organic solvents, petroleum products.

WATERFIX XP TH is a single-component, thixotropic dry mortar mix designed especially for manufacturing waterproofing membrane on the walls and ceilings of concrete, reinforced concrete and masonry structures. Mortar WATERFIX XP TH can be treated directly with by appropriate type of secondary protection, depending on the exposure of the repaired structure, or it may be further coated by the spread coating material DENSOFIX XP. Due to secondary crystallization in the pore system of a water-bearing concrete, it creates an insulating layer on the surface of a concrete structure, which is impermeable to water, oil, organic solvents, petroleum products etc

Physical and mechanical parameters

Requirements / results according to EN 14891

Testing method Requirements Results
Adhesion to base (MPa) initial EN 14891 > 0.5 > 2.0
after contact with water EN 14891 > 0.5 > 2.0
after aging in heat EN 14891 > 0.5 > 2.0
after de-icing cycles EN 14891 > 0.5 > 2.0
after contact with limewater EN 14891 > 0.5 > 2.0
Water tightness EN 14891 no penetration no leakage
Crack-bridging ability under normal conditions EN 14891 > 0.75 NPD

Physical and mechanical parameters

Color Non-standard grey
Bulk density of fresh mortar (kg/m3) 2,200 ± 50
Tensile bending strength (MPa) 7 days > 4.0 > 4.5 > 4.8
28 days > 7.0 > 7.5 > 8.5
Compressive strength (MPa) 7 days > 20 > 23 > 25
28 days > 36 > 40 > 44
Dynamic E-module (GPa) < 23 < 26 < 28
Termiline paisumiskoefitsient (K-1) 11.5 ± 0.4 x 10-6
Frost resistance > T100
Filtration coefficient k (ms-1) < 2.5×10-12

Test certificates
Meets the requirements of EN 14891, annex ZA.
Initial type testing according to EN 14891 issued by TSÚS Bratislava.
Supervision of the quality system, EMS and OHSAS is carried out by Notified Body No. 1020.

Instruction for preparation and application.
During the processing of WATERFIX XP TH dry mortar mixes it is generally necessary to comply with the principles contained in the relevant technological process BETOSAN for repair of reinforced concrete structures (TP # 1/06)
Base. Any incoherent, loose, weatherworn or otherwise visibly damaged concrete shall be completely removed from the surface of the base. Corroded reinforcement shall be carefully released and cleaned of any corrosive products. Before application of repair material, humidification of the base surface shall be properly and repeatedly performed for at least 120 minutes. The properly humidified concrete shall be dully dump, and not covered with dump shining water film. Substrate can be cohesive masonry as well. It is possible to anchor the material to substrate by adhesion bridge DENSOCRETE 111 or mechanically.

Preparation of mortar.
The mortar is prepared by simple mixing with water. During mixing, it is necessary
to use a low-speed mixer with forced circulation. Recommended mixing ratio is shown in the following table:

Type of mortar max size of fillers recommended mixing ratio applied layer thickness
dry component (kg) water (liters) min. (mm) max. (mm)
WATERFIX XP TH f fine 1 mm 25 3.75 ÷ 4.00 3 12
WATERFIX XP TH r medium 4 mm 25 3.50 ÷ 3.75 10 25
WATERFIX XP TH c coarse 8 mm 25 3.45 ÷ 3.70 20 40

The recommended batch of water can be adjusted to reach optimum workability. If added water exceeds the recommended quantity by 10%, risk of cracking is significantly enhanced. It can also lead to drop of mechanical properties.

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.

Mortar application. WATERFIX XP TH can be applied either manually or mechanically by dry or wet spraying. The mortar can be manually applied either by rendering or fining off. First layer (connecting) needs to be applied in such a way to ensure that no unfilled spaces are created behind reinforcement, in caverns etc.). After initial application it is recommended to spread the mortar into pores and uneven spaces. This can be done well with flat paint brush with short hair, or by a toothed trowel. Proper adhesion of the material to substrate in application stage is basic condition for good quality adhesion in the final state. In localized repairs it is necessary to pay appropriate attention to edge regions or repaired area, where the edge needs to be properly compacted, without entrapped air pockets or other non-homogeneities. The repair is always done from place of deepest degradation, in such a way that the final layer it to be continuous over entire area, if possible.

Surface finalization. After initial setting of the last layer, smoothing by a dry polyurethane finisher is used for surfacing. Wet surfacing is not allowed. If the surface is to be smoothed with fine spread coating (e.g. DENSOFIX), ruling off by a wooden tamper is sufficient.

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 treatment agents DENSOCURE W and DENSOCURE R proved well

Specific consumption
Specific consumption of dry mortar is 1.7 ÷ 1.8 kg/m2 at 1 mm of layer thickness. In spray application, it is necessary to count with loss of 10 ÷ 12 %

More info on the product page
WATERFIX XP TH (pdf, 0.2 MB)