Sika® Sigunit® P-1 AF
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.
- 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 substrate
- Chloride-free, no negative affect on reinforcement steel
- High flexibility in use
- Low cost of logistics
- Longer shelf-life
Usage
Sika® Sigunit® P-1 AF dissolved in water is suitable for both dry and wet spraying processes and it is used for:- Excavation stabilisation in tunnelling and mining
- Rock- and slope stabilisation
- 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 substrate
- Chloride-free, no negative affect on reinforcement steel
- High flexibility in use
- Low cost of logistics
- Longer shelf-life
Packaging
600 Kg Bulk Bag
Colour
Fine powder / white
Product Details
Composition / Manufacturing
Special inorganic materials.
Shelf Life
36 months from date of production if stored properly in original unopened, sealed and undamaged packaging in dry conditions.
Solution: At a concentration of 55%, the liquid product mixed from Sika® Sigunit® P-1 AF has a shelf life of 2 weeks.
Storage Conditions
Protected from humidity, direct sunlight and frost, preferably at temperatures between 5 and 30°C.
The liquid product mixed from Sika® Sigunit® P-1 AF must be stored in suitable containers made of plastic or stainless steel.
Bulk Density
~ 0.85 kg/L
pH-Value
~ 3.0 dissolved in water
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 0.5 and a flow table spread of more than 500 mm. Temperature of basic mix must be higher than 15°C.
Concrete Substrate
The substrate must be clean, free of loose stones and free of water under hydrostatic pressure.
Application
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 10 cm applied in one pass, dosage of a 55% solution is between 4% and 8% of weight of binder. Lower ambient and basic mix temperatures require higher dosage of accelerator.
Depending on the required performance Sika® Sigunit® P-1 AF is dissolved in water with a powder/water ratio of 45/55 M-% to 55/45 M-%. It has to be mixed in minimum for 45 minutes. Please consult the Method Statement of Sigunit-P1 AF / -P10 AF.
