Product Data Sheet Show all documents

Sika® Sigunit® P-1 AF

ACCELERATING SHOTCRETE ADMIXTURE POWDER

Sika® Sigunit® P-1 AF is a readily soluble powder. Sika® Sigunit® P-1 AF dissolved in water is a high      performance liquid, alkali-free set accelerator for shotcrete. Its effectiveness depends on its mixing      ratio between powder and water.

Sika® Sigunit® P-1 AF dissolved in water as a shotcrete set accelerator has the following characteristics and advantages:
  • High early strength development
  • Alkali-free
  • Minimal strength loss of the accelerated concrete
  • No pollution of groundwater by leached out alkalis
  • Distinct reduction of rebound and dust
  • Improves bond of shotcrete to rock and concrete thus facilitating overhead spraying
  • Chloride-free, no negative affect on reinforcement steel
The supply in powder form has the following additional advantages:
  • High flexibility in use
  • Low cost of logistics
  • Longer shelf-life
Product Data Sheet Show all documents

Usage

Sika® Sigunit® P-1 AF dissolved in water is suitable for both dry and wet spraying processes and it is used for:
  • Support at the face whilst advancing tunnel and mines
  • Rock and slope stabilization
  • High quality lining shotcrete
 

Advantages

Sika® Sigunit® P-1 AF dissolved in water as a shotcrete set accelerator has the following characteristics and advantages:
  • High early strength development
  • Alkali-free
  • Minimal strength loss of the accelerated concrete
  • No pollution of groundwater by leached out alkalis
  • Distinct reduction of rebound and dust
  • Improves bond of shotcrete to rock and concrete thus facilitating overhead spraying
  • Chloride-free, no negative affect on reinforcement steel
The supply in powder form has the following additional advantages:
  • High flexibility in use
  • Low cost of logistics
  • Longer shelf-life

Packaging

25 kg bag

Colour

Fine powder / white

Product Details

Product Information

Chemical Base

Special inorganic materials.

Shelf Life

12 months from date of production if stored properly in original unopened, sealed and undamaged packaging in dry conditions.

Storage Conditions

Protect from humidity, direct sunlight, preferably at temperatures between +5°C and +30°C.

Bulk Density

~ 0.75 kg/L

pH-Value

~ 3.0 dissolved in water
Technical Information

Specific Advice

Dissolved Sika® Sigunit® P-1 AF is added at the nozzle. Accurate and constant dosing into the concrete flow is essential.

Dissolving: Please, consult Method Statement of Sigunit-P1 AF /-P10 AF

Concrete Mix Design

The suitability of the proposed mix design must be tested in field trials before commencement of the project. High quality shotcrete requires a w/c ratio of less than 0.48 and a flow table spread of more than >45 cm. Temperature of basic mix must be higher than 15°C.

  • 8 mm aggregate size
  • use of appropriate superplasticizer (viscocrete)

Substrate

The substrate must be clean, free of loose stones and free of water under hydrostatic pressure.

Application

Consumption

Recommended Dosage

The correct dosage of the liquid accelerator has to be determined by preliminary testing and depends on the concentration of the liquid. For layer thicknesses of up to 15 cm applied in one pass, dosage of solution is between 3% and 6% of weight of binder. Lower ambient and basic mix temperatures require higher dosage of accelerator.

 

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