Product Data Sheet Safety Data Sheet Show all documents

Sikacrete® Gunit-103

Machine applied repair mortar

Sikacrete® Gunit-103 is a cementitious one component repair mortar containing microsilica and super plasticisers to enhance application and performance properties. Sikacrete® Gunit-103 does not contain set accelerators and is gun applied using the dry spray process.

  • One component mortar - ready for use.
  • Rapid strength development without use of accelerators.
  • Layer thicknesses up to 150mm overhead are possible in one application.
  • Drying shrinkage approx. 600 microstrain at 28 days
  • Improved sulphate resistance.
  • High density, excellent compaction.
  • Low rebound, minimum waste, minimum dust.
  • Good adhesion to existing concrete.
  • Greatly reduced labour, scaffolding and formwork costs.
  • Increased speed and efficiency of repair work.
  • Can be trowelled and screeded after application.
  • Application can be stopped or started at any time.
  • Ideal for use in conditions where access is difficult.
  • Manufactured to give a consistent and assured level of performance.
Product Data Sheet Safety Data Sheet Show all documents

Usage

Sikacrete® Gunit-103 is an ideal product for use in all general applications where large volume repair work is to be carried out using the mechanically  applied dry spray system. Typical uses for Sikacrete® Gunit-103 are:
  • Large volume repairs to reinforced concrete structures.
  • Concrete repairs requiring high early strength.
  • Thick layer concrete repair work to large areas such as slab soffits.
  • Tunnel linings and repair.
  • Retaining structures for ground stabilisation.
 

Advantages

  • One component mortar - ready for use.
  • Rapid strength development without use of accelerators.
  • Layer thicknesses up to 150mm overhead are possible in one application.
  • Drying shrinkage approx. 600 microstrain at 28 days
  • Improved sulphate resistance.
  • High density, excellent compaction.
  • Low rebound, minimum waste, minimum dust.
  • Good adhesion to existing concrete.
  • Greatly reduced labour, scaffolding and formwork costs.
  • Increased speed and efficiency of repair work.
  • Can be trowelled and screeded after application.
  • Application can be stopped or started at any time.
  • Ideal for use in conditions where access is difficult.
  • Manufactured to give a consistent and assured level of performance.

Packaging

25 kg bag

Colour

Grey powder

Product Details

Product Information

Composition

Cementitious powder

Shelf life

Six (6) months from date of manufacture when stored as stated.

Storage conditions

Store in unopened original packaging in cool dry conditions below +25°C.

Maximum grain size

3 mm

Density

Dry powder = 1.7 kg/litre. Sprayed mix = 2.2 kg/litre.
Technical Information

Compressive strength

> 60 MPa at 28 days

 

Modulus of elasticity in compression

32,000 MPa approx.

Tensile adhesion strength

2-3 MPa approx. (depending on condition of substrate)

Application

Application Information

Mixing ratio

Water/Cement ratio: Approx. 0.35 - 0.40

Layer thickness

Minimum thickness/coat: 10 mm

Ambient air temperature

Application temperature: Not below + 5°C
Consumption

Yield

25 kg of powder = approx. 11.5 litres of sprayed material
Application steps

EQUIPMENT

Sikacrete® Gunit-103 can be applied through most types of conventional dry spray equipment (rotor capacity up to 2.0 litres, hose diameter 25/40 or 32/52, nozzle diameter 25/15 or 32/18, 27).

MIXING

Sikacrete® Gunit-103 has been formulated to ensure that spraying can only be achieved when using the correct water/cement ratio of 0.35 - 0.40. Too little
water will result in excessive amounts of dust, whereas too much water will cause excessive slumping and non-adhesion of the mortar.

 

APPLICATION

  • Sikacrete® Gunit-103 can be applied through most types of conventional dry spray equipment (rotor capacity up to 2.0 litres, hose diameter 25/40 or 32/52, nozzle diameter 25/15 or 32/18, 27).
  • Tip the dry Sikacrete® Gunit-103 mortar straight into the hopper of the machine. The required water is added at the nozzle.
  • Application should be carried out by an experienced ‘nozzle man’ to ensure that satisfactory results are achieved.
  • Immediately after application the mortar can be screeded and trowelled to the desired finish.

CLEANING OF EQUIPMENT

Remove non-hardened Sikacrete® Gunit-103 from tools and equipment with water. Hardened material can only be removed mechanically. To clean the dry spray machine simply blow through with compressed air.

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