Product Data Sheet Show all documents

Sika MonoTop® HSF

High Strength Structural Repair Mortar

Sika MonoTop® HSF is a single component cementitious, silica fume containing, synthetic fibre reinforced, structural repair mortar that contains Portland Cement, well graded sands, specially selected fibres and additives to improve the fresh and hardened properties.
Suitable for use in hot and tropical climatic conditions.

Sika MonoTop® HSF provides the following beneficial properties:
  • Structural repair
  • Rapid strength gain and high final strength
  • Good water and oil resistance
  • Low shrinkage behaviour
  • High abrasion resistance
  • Good adhesion
  • Easy to apply
  • Application up to 60 mm in 1 layer
  • Low permeability
Product Data Sheet Show all documents

Usage

Sika MonoTop® HSF is used for structural repair work and suitable for:
  • Restoration works, repair of spalling and damaged concrete in buildings, bridges, infrastructure and superstructure works.
  • Structural strengthening by increasing the bearing capacity of the concrete structure by adding mortar (section enlargement).
  • Preserving or restoring passivity by increasing cover with additional mortar and replacing contaminated or carbonated concrete.
 

Advantages

Sika MonoTop® HSF provides the following beneficial properties:
  • Structural repair
  • Rapid strength gain and high final strength
  • Good water and oil resistance
  • Low shrinkage behaviour
  • High abrasion resistance
  • Good adhesion
  • Easy to apply
  • Application up to 60 mm in 1 layer
  • Low permeability

Packaging

25 kg paper bags

Colour

Grey powder

Product Details

Product Information

Composition

Polymer containing cementitious mortar with different additives and synthetic fibres

Shelf life

12 months minimum from date of production

Storage conditions

Store in a cool, dry area in original sealed packaging and at temperatures between +5 °C and +35 °C. Protect from direct sunlight, heat and moisture.

Maximum grain size

~2 mm

 
Technical Information

Compressive strength

w/p = 0.14

1 day

7 day

28 day

≥ 25 N/mm2

≥ 45 N/mm2

≥ 65 N/mm2

Tensile adhesion strength

≥ 1.5 N/mm2 (or concrete failure)

(BS 1881)

Application

Application Information

Mixing ratio

3.50 - 4.0 L of water per 25 kg bag

Fresh mortar density

~2.15 kg/l (+25 °C)

Layer thickness

Min. 5 mm

Max. 60 mm

Ambient air temperature

+5 °C min. / +40 °C max.

Substrate temperature

+5 °C min. / +40 °C max.
Application steps

MIXING

Mix 25 kg bag with the necessary, above mentioned, amount of cold water, using an electric blender with a suitable mixing spiral, in a clean bucket. Add the Sika MonoTop® HSF powder slowly while mixing continuously for at least 3 minutes and until a homogeneous consistency is achieved.
Sika MonoTop® HSF is best mixed in a forced action mixer. Slow speed double paddle drill can be also used for mixing. Do not mix at faster rate than 500 rpm, because of mechanical strength decay of the cured product. The obtained mix results very creamy, easily spreadable and thixotropic.

APPLICATION

Apply Sika MonoTop® HSF while the bonding agent is still wet. The mortar can be applied by spatula or trowel.
For any thickness more than 60 mm, Sika MonoTop® HSF must be applied in several layers.
As soon as the mortar has started to set it can be smoothed by wooden or synthetic float. For fine surface finish SikaRep® Fine N, SikaRep® Fine PC can be applied over the Sika MonoTop® HSF.

CURING TREATMENT

Where ambient conditions may lead to rapid surface drying, the use of light water fogging for 48 hours or application of a suitable water based curing compound like Sika® Antisol WB is recommended. Do not commence fogging until final set has been reached.

CLEANING OF EQUIPMENT

Clean all tools and equipment with water immediately after use. Hardened Sika MonoTop® HSF can only be removed mechanically.

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