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Sika® Sigunit®-15 AF 11 L PK

Alkali Free Liquid Accelerator Shotcrete Admixture

Sika® Sigunit®-15 AF 11 L PK is a high performance, alkali free accelerator for shotcrete in liquid form.

The accelerator’s effect depends on the cement content, type and age, the shotcrete and substrate temperatures, layer thicknesses and the spray process. The water/ cement ratio in wet spraying and the quantity of mixing water in dry spraying are important criteria for the accelerating effects of Sika® Sigunit®-15 AF 11 L PK. Sika® Sigunit®-15 AF 11 L PK has following characteristics and advantages as a shotcrete accelerator:
  • High early strength development
  • Alkali-free
  • Minimal strength loss of the accelerated concrete
  • No additional pollution of surface and groundwater by leached out alkalis
  • Lower rebound during application
  • Improves bond of shotcrete to rock and concrete, thus facilitating overhead spraying
  • Distinct reduction of dust
  • Chloride free: does not attack steel reinforcement
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Product Data Sheet Show all documents

Usage

Sika® Sigunit®-15 AF 11 L PK is suitable for use as an accelerator in both the dry and wet spray processes. The main uses of Sika® Sigunit®-15 AF 11 L PK are as follows:
  • Shotcrete with high initial strength
  • Support at the face
  • In tunneling
  • In mining
  • In gallery construction
  • In shaft construction
  • Lining stabilization in underground works
  • Rock and slope stabilization
  • High quality lining shotcrete
  • To form permanent gunite or shotcrete shells  

Advantages

The accelerator’s effect depends on the cement content, type and age, the shotcrete and substrate temperatures, layer thicknesses and the spray process. The water/ cement ratio in wet spraying and the quantity of mixing water in dry spraying are important criteria for the accelerating effects of Sika® Sigunit®-15 AF 11 L PK. Sika® Sigunit®-15 AF 11 L PK has following characteristics and advantages as a shotcrete accelerator:
  • High early strength development
  • Alkali-free
  • Minimal strength loss of the accelerated concrete
  • No additional pollution of surface and groundwater by leached out alkalis
  • Lower rebound during application
  • Improves bond of shotcrete to rock and concrete, thus facilitating overhead spraying
  • Distinct reduction of dust
  • Chloride free: does not attack steel reinforcement

Packaging

05 ltr jerry can

20 ltr plastic can

200 ltr drum

1000 ltr IBC

Bulk supply in tanker is possible on demand

Colour

Turbid Viscous liquid

Product Details

Sustainability / Certifications / Approvals

APPROVALS / STANDARDS

Sika® Sigunit®-15 AF 11 L PK follows the requirements of ASTM 1102 - 94.
Product Information

Chemical Base

Special blend of inorganic materials

Shelf Life

06 months minimum from production date if stored properly in

original unopened packaging.

Storage Conditions

Store in undamaged, unopened, original sealed containers, protected from direct sunlight and frost, at temperature between +5 °C and +35 °C. 

Opened containers must be used as quickly as possible.

pH-Value

< 4

Total Chloride Ion Content

Nil

Specific gravity

1.4 - 1.6 at 25°C
System information

System Structure

Pumped concrete aggregate grading:

  • Normally max. aggregate size 8mm
  • Concrete consistency (dependent on spray equipment): flow table spread size 45cm; w/c ratio 0.48
  • The use of a suitable superplasticizer (such as Sikament, Sika Plastiment and Sika Viscocrete) is essential
  • Temperature of fresh concrete: > 15°C

Application

Consumption

Recommended Dosage

The correct dosage must be determined by preliminary testing. For layering thicknesses of up to 15cm in one pass, dosage is 3% to 10% of weight of binder.

Dosage of Sika® Sigunit®-15 AF 11 L PK is by peristaltic pump, such as the Aliva-403. Optimized mixing into the concrete mix and skilled nozzle handling are also essential.

The following Sika products are generally used for the basic shotcrete mix:

  • Sikament, Sika Plastiment and Sika Viscocrete
  • SikaFume
  • Sika Pump

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