Mortar additive Sika® Sigunit®-49 AF

for concrete

Sika® Sigunit®-49 AF is a non-toxic, alkali-free accelerator in powder form for shotcrete in the dry spray process. Alkalifree fast cement setting Minimum strength loss in the spray concrete Accredited for the French railways Usage When large thicknesses is required to be sprayed even if overhead spraying is necessary When high initial strength is needed / the shotcrete must play a supporting role in the early stage. The main application areas of Sika® Sigunit®-49 AF are: Heading stabilization in tunnelling Support at the face in tunnelling Rock and slope stabilisation Advantages Sika® Sigunit®-49 AF causes in the shotcrete: Fast setting and high early strength The performance is depending on: Cement content, - age and kind Shotcrete and substrate temperatures The quantity of mixing water Layer thicknesses and the spray process The following advantages distinguish Sika® Sigunit®-49 AF as a shotcrete accelerator: Alkali-free and non-toxic, which eliminates any adverse effects from additional alkali`s in the spray dust If proper applied minimum strength loss in the accelerated concrete No additional surface and ground water pollution by leached-out alkalis Lower rebound during application Improves bond of shotcrete to rock and concrete, makind overhead spraying easier Sika® Sigunit®-49 AF is non corrosive to steal reinforcement Packaging 25 kg bags, 40 bags on a pallet Colour Beige powder Composition Mineral based alkali-free powder Shelf life 12 months shelf life from date of production if stored properly in undamaged, unopened, original sealed packaging.