Product Data Sheet Safety Data Sheet Show all documents

Sika® Arctic Overlay

Silica-Fume and Fiber-Reinforced, Micro Concrete For Structural
Concrete Repair and High Quality Re-Surfacing of Concrete Slabs

Sika® Arctic Overlay is a prebagged micro concrete with adjustable workabillity to meet project performance and placement requirements. It can receive Sika's industrial coatings and flooring materials and has been specifically developed to reduce heat generation. Therefore. large volume repairs may be performed without addition of aggregates. With its high silica fume content and combination of pozzolanic binders, a highly dense, impervious and hence durable repair micro concrete is obtained. Sika® Arctic Overlay contains a combination of three pozzolanic binders, silica fume, fibres, graded aggregates and a powerfull 4th generation superplasticizer based on our Viscocrete technology.

  • Prebagged at the factory - consistent quality
  • Easy to mix and apply
  • Good workabillity characteristics
  • Suitable for large repairs
  • High ultimate strengths
  • Very dense and durable
  • Non-toxic and non-corrosive
  • Chloride and iron-free
  • Impact and vibration resistant
Product Data Sheet Safety Data Sheet Show all documents

Usage

Sika® Arctic Overlay is suitable for structural repairs to marine structures, bridges, columns, etc. It is also conducive for use in the following repair works where single placing is in excess of 25 mm:  
  • Bridge columns and beams
  • Jetty piles
  • Concrete piling
  • Spillways
  • Re-surfacing of heavily traffict concrete slabs
  • Rehabilitation of concrete slabs prior to industrial flooring installation
Sika® Arctic Overlay can be applied with conventional screeder bars and finished of by powerfloat.

Advantages

  • Prebagged at the factory - consistent quality
  • Easy to mix and apply
  • Good workabillity characteristics
  • Suitable for large repairs
  • High ultimate strengths
  • Very dense and durable
  • Non-toxic and non-corrosive
  • Chloride and iron-free
  • Impact and vibration resistant

Packaging

25 kg bag

Colour

Concrete Grey prebagged powder

Product Details

Product Information

Shelf life

12 months from date of production when stored in original unopened
packaging in a cool, dry place

Storage conditions

Store in dry conditions and protected from direct sunlight.

Density

~ 2.30 - 2.35 kg/ltr (freshly mixed micro concrete)

Maximum Grain Size

8 mm maximum

 
Technical Information

Compressive Strength

Prefered

Application

Structural Repair, Form & Pump or Form & Pour

Structural Repair, Form & Pump or Form & Pour

Wearing layer on concrete slabs, HP-Screed laid to fall(Overcoatable)

Wearing layer on concrete slabs, HP-Screed laid to fall(Overcoatable)

Water per 25kg bag1.9 - 2.0 liter1.7 - 1.8 liter
1.6 - 1.7 liter
1.5 - 1.6 liter
1 day> 18> 25> 28> 32
3 days> 32> 40> 46> 50
7 days> 40> 48> 53> 62
28 days> 45> 53> 60> 70

Compressive Strength (N/mm2)

Structural Repair, Form & Pump or Form & Pour

Water per 25 kg bag

Slump (Initial)

Slump After 40 Min.

1.9 - 2.0 liter

22 - 25

17 - 20

1.7 - 1.8 liter

20 - 23

15 - 18

Tensile Strength

At 28 days > 2.5 N/mm2 concrete failure (with bonding bridge: SikaTop® Armatec 110 EpoCem® or Sikadur® -32 TH / at 30°C under laboratory conditions)

Application

Application Information

Mixing Ratio

Water addition depends on required consistency:
1.5 (stiff) - 2.0 (flowing) litres of water per 25 kg of powder

Pot Life

Minimum 40 minutes (at 30°C)
Consumption

Consumption

For 1 m3 of mortar approx. 87 x 25 kg bags and 152 litres of water.
Application steps

MIXING

Sika® Arctic Overlay should be mechanically mixed in a pan type compusary mixer. A normal tilting drum concrete mixer is not suitable. According to the mixing ratio (1.5 - 2 litres per 25 kg bag) place first the water into the clean mixing pan and add Sika® Arctic Overlay slowly while mixing. Ensure a minimum mixing time of 3 minutes.

APPLICATION

After mixing, pour or pump the Sika® Arctic Overlay immediately into the prepared formwork. Consolidate the placed Sika® Arctic Overlay with
external formwork vibrators or use suitable bottle type vibrators.

When placing Sika® Arctic Overlay over a large area,it is advisable to maintain continuous flow of mixed material to avoid formation of cold joints. Work sequence should be organized accordingly. In such large areas, Sika® Arctic Overlay may be pumped using a heavy-duty piston or screw feed pump.

 

CURING TREATMENT

Exposed surfaces should be kept to a minimum and cured with appropriate curing method as soon as the mortar has hardened. The formwork can be stripped after at least 3 days. Upon removal of the formwork, cure the repaired areas immediately with Antisol® -E curing compound if no further treatment is required or Antisol® -S curing compound if a protective coating is to be applied (consult Sika Technical Services Department) - refer to the respective Product Data Sheet for application rate and method.

CLEANING OF EQUIPMENT

Clean all tools and equipment with water immediately after use. Hardened mortar can only be mechanically removed.

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