Product Data Sheet Safety Data Sheet Show all documents
Sika® Sigunit® L-500 AFI

Sika® Sigunit® L-500 AFI

LIQUID ALKALI-FREE SHOTCRETE ACCELERATOR

 Sika® Sigunit® L-500 AFI is a high-performance,liquid, alkali-free accelerator for wet or dry shotcrete.

  • Alkali-free, avoiding additional leaching and pollution of alkalis and pollution of ground and surface water.
  • When correctly used, marginal reduction of shotcrete strength. 
  • Reduction of rebound.
  • Easier overhead spraying by improved bond of shotcrete to rock and concrete.
  • Reduction of dust formation. 
  • Chloride-free, suitable for steel reinforced shotcrete and substrates. 
Product Data Sheet Safety Data Sheet Show all documents

Usage

  • High quality and high initial strength shotcrete for general construction work. 
  • Support at the face and securing of rock in tunnel and mine construction.
  • Rock and slope stabilization along highways and transportation routes. 
 

Advantages

  • Alkali-free, avoiding additional leaching and pollution of alkalis and pollution of ground and surface water.
  • When correctly used, marginal reduction of shotcrete strength. 
  • Reduction of rebound.
  • Easier overhead spraying by improved bond of shotcrete to rock and concrete.
  • Reduction of dust formation. 
  • Chloride-free, suitable for steel reinforced shotcrete and substrates. 

Packaging

1040 L IBC

Bulk Delivery

Colour

Off White

Product Details

Product Information

Shelf Life

Four (4) months when stored in unopened,undamaged container in dry conditions, protected from sun and weather. 

Storage Conditions

Store at temperatures between 10 and 35 °C (50 and 95 °F).

Density

Density of solution 1.36 kg/L

Conventional Dry Material Content

The dry matter content in solution is 45%

Total Chloride Ion Content

No added chlorides.

Water soluble chloride (CI), weight-% < 0.15
Technical Information

Specific Advice

Application temperatures: Concrete temperatures should not be lower than 15 °C (59 °F), especially in cases of thick shotcrete layers. Lower temperatures will require higher dosages.

Concrete Substrate

Substrate temperatures should not be lower than 15 °C (59 °F) (especially in cases of thick shotcrete layers). Lower temperatures will require higher dosages.

Application

Consumption

Recommended Dosage

The exact dosage must be determined by preliminary testing. The dosage of Sika® Sigunit® L-500 AFI, should be between 4 and 8 % based on cementitious content. Lower temperatures will require higher dosages. The set accelerating effect of Sika® Sigunit® L-500 AFI depends on cement content, age, type and substrate. It is also dependent on the temperature of the shotcrete and the application area and shotcrete methods used. The performance of the Sika® Sigunit® L-500 AFI also sigificantly depends upon the w/c ratio of the shotcrete mix, in the wet spray process, and the amount of water added during spraying, in the dry spray process.

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