Product Data Sheet Show all documents

Sika® Sigunit® L-5401 AF

Shotcrete spraying accelerator

Sika® Sigunit® L-5401 AF is a high-performance liquid, alkalifree, set accelerator for shotcrete.

Sika® Sigunit® L-5401 AF has the following characteristics and advantages:
▪ High early strength development
▪ Alkali-free
▪ Distinct reduction of rebound and dust
▪ Improved bond of shotcrete to the substrate
▪ Chloride-free, no negative affect on reinforcement steel
Product Data Sheet Show all documents

Usage

Sika® Sigunit® L-5401 AF is suitable for both dry and wet spraying processes and it is used for:
▪ Excavation stabilisation in tunnelling and mining
▪ Rock, slope and trench stabilisation
▪ High quality lining shotcrete  

Advantages

Sika® Sigunit® L-5401 AF has the following characteristics and advantages:
▪ High early strength development
▪ Alkali-free
▪ Distinct reduction of rebound and dust
▪ Improved bond of shotcrete to the substrate
▪ Chloride-free, no negative affect on reinforcement steel

Packaging

IBC (pallet tank)

Colour

Off white suspension

Product Details

Product Information

Composition

Inorganic aluminium complexes

Shelf life

Four (4) months from date of production if stored in original, undamaged and sealed containers.

Storage conditions

Storage at temperatures between 5°C and 35°C. Protect from direct sunlight, frost and contamination. Use clean containers when delivered in bulk. In case of separation of Sika® Sigunit® L-5401 AF the suspension has to be homogenised before using. Sika® Sigunit® L-5401 AF must not be stored in standard steel containers.

Density

~ 1.44 kg/L
Technical Information

Specific advice

Sika® Sigunit® L-5401 AF is added at the nozzle. Accurate and constant dosing into the concrete flow is essential.

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. Temperature of basic mix must be higher than 15°C.

Substrate

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

Application

Consumption

Recommended dosage

The correct dosage must be determined by preliminary testing. For layer thicknesses of up to 100 mm applied in one pass, the recommended accelerator dosage is between 5 % and 9 % by weight of binder. Lower ambient and basic mix temperatures require higher dosage of accelerator.

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