Sika® Sigunit® L-1453 AF

Special inorganic substances in liquid form

6 months if stored properly in original unopened packaging

Stored in cool and dry conditions, protected from direct sunlight

1.36 – 1.46 kg/l

(At 20°C)

2.00 – 3.00

(At 25°C)

Concrete temperature should not be lower than 15 deg.C (especially so for thick layers). Lower temperatures require higher dosages.

Generally speaking, the accelerator will be added and mixed with the other concrete components as follows:
Dry process: Sika® Sigunit® L-1453 AF is supplied from the liquid dosing unit to the mixing tube assembly by means of water under pressure (2-3 bars more than the conveying pressure). The mixing tube assembly being located ~ 2.5 meters behind the nozzle or at the nozzle directly.

Wet process: Sika® Sigunit® L-1453 AF is supplied from the liquid dosing unit to the mixing tube assembly by means of air under pressure (2-3 bars more than the conveying pressure). The mixing tube assembly being located ~2.5 meters behind the nozzle or at the nozzle directly.

Sika® Sigunit® L-1453 AF is added thanks to suitable liquid dosing unit such as Aliva AL 403.4 (24-240 lt/h) or AL 403.5 (30-700 lt/h).
Suitable dosing unit type is determined according to cement content, spraying out-put and the accelerator dosage.

When using sulphate resistant cement, strength development may be slower

• Sika® Sigunit® L-1453 AF is not compatible with Sika® Sigunit® L-20/L-62
• Accelerator hoses must be throughly cleaned before using Sika® Sigunit® L-1453 AF
• Metal parts of the pump coming into contact with Sika® Sigunit® L-1453 AF must be stainless steel
• The set accelerating effect depends on cement content, cement age, cement type, temperature of shotcrete and substrate as well as on layer thickness and shotcreting method

A further efficiency parameter of Sika® Sigunit® L-1453 AF is the W/C ratio of the concrete mix in wet process or the quantity of water added at the nozzle in dry process

• Do not store under direct sunlight
• Sika® Sigunit® L-1453 AF is suspended solution. Stir the product well before use

Accelerator dosage depends on many factors and actually should be adjusted as per the site conditions met.
It should not be fixed for one time at all!
The dosage of the accelerator would vary according to the scope of work. Typically if the reduction of the rebound (without early strength) is
required the dosage would be 2-4%. If early strength is required, dosage would be 4-6%. It would depend as well as on the type of application,
vertical (benches) spraying or over-head spraying.
The performance of the accelerator would depend on the cement type, content, age and quality, the W/C of the mix, temperature of the mix, the
substrate condition, etc.
As guide line, accelerator dosage – that need to be confirmed by site trial: