Mortar additive Sika® Sigunit®-59 AF

for concrete

Sika® Sigunit®-59 AF is an alkali-free setting accelerator for dry-mix shotcrete in powder form. Alkalifree fast cement setting Especially for CO2 reduced cement Minimum strength loss in the spray concrete Usage Sika® Sigunit®-59 AF is especially formulated for use as setting accelerator in Portland and Portland composite cement based mortars and concrete. The product is particularly suitable for: Applications, where high initial strength is needed and/or the shotcrete must play a supporting role in the early stage Dry-mix shotcrete for tunnel repairs, heading stabilization in tunneling, slope and trench stabilization, etc. Processing in thin-flow process Advantages The benefits of Sika® Sigunit®-59 AF include, but are not limited to the following: Very effective in Portland and Portland composite cement based systems, such as CEM II/B-M (S-T) Low dosage Fast cement setting High early strength development of shotcrete Lower rebound during application Improved bond of shotcrete to rock and concrete, making overhead spraying easier Minimum strength loss in the accelerated concrete Sika® Sigunit®-59 AF is non corrosive to steel reinforcement Alkali-free, which eliminates any adverse effects from additional alkali in the spray dust No additional surface and ground water pollution by leached-out alkali Packaging 20 kg bags, 800 kg on pallet; 1000 kg BigBag Colour White powder Composition Mineral based, alkali-free powder Shelf life 24 months shelf life from date of production if stored dry and properly in undamaged, unopened, original sealed packaging. Storage conditions Dry storage at temperatures up to 30 °C. Protect from direct sunlight.