Product Data Sheet Show all documents

Sika® Sigunit® L

Liquid shotcrete accelerating admixture for the wet spray process

Sika® Sigunit® L is a liquid cohesion agent and a rebound reducer for the wet spray method with momentary gluing effect.

Sika® Sigunit® L produces increased internal cohesion and adhesion of shotcrete.
  • Reduced significantly the rebound of the gun mix
  • Thick layers can be applied in one application
  • Improves adhesion of the shotcrete to walls, rock formations and
  • concrete and thus facilitates overhead application of shotcrete
  • Result in dust reductions
  • Makes it possible to produce a high strength and dense shotcrete
Product Data Sheet Show all documents

Usage

Sika® Sigunit® L is used in producing an economical and high quality wet shotcrete.
  • To produce permanent gunite and shotcrete elements
  • To secure loose and fragranted rock formations during mechanical or conventional tunnel construction
  • To secure construction pits and sub-terranean excavations
  • For rock and soil stabilisation
 

Advantages

Sika® Sigunit® L produces increased internal cohesion and adhesion of shotcrete.
  • Reduced significantly the rebound of the gun mix
  • Thick layers can be applied in one application
  • Improves adhesion of the shotcrete to walls, rock formations and
  • concrete and thus facilitates overhead application of shotcrete
  • Result in dust reductions
  • Makes it possible to produce a high strength and dense shotcrete

Packaging

250 kg/ 300kg

Colour

Viscous hazy liquid

Product Details

Sustainability / Certifications / Approvals

APPROVALS / STANDARDS

ASTM C 1141 Type II Grade 9 Class A
Product Information

Chemical Base

Modified silicate

Shelf Life

12 months from date of production if stored in undamaged and unopened, original sealed containers.

Note: Once containers are opened, use the material as quickly as possible.

Storage Conditions

Sika® Sigunit® L must be stored in its original containers.

Sika® Sigunit® L has a reaction in air with atmospheric humidity [moisture] or rain etc., and must therefore always be stored in sealed containers. Sika® Sigunit® L should only be decanted into clean containers.  Avoid mixing with air - filling through floor inlets or immersed pipes is best.  Containers must always be properly sealed.

Do not store in aluminium tanks.

Protect from extreme cold.

Density

~1.38 kg/l at 25 ºC

Application

Application Information

Dispensing

Sika® Sigunit® L must be added with a gauging device suitable for the wet spray process.

Skilled nozzle operation and thorough mixing within the concrete are essential.
Consumption

Recommended Dosage

The correct dosage must be determined by preliminary testing. For layer thicknesses of up to about 20 cm in one pass, dosage is between 3% and 7% by weight of binder. Actual dosage to be finalised on the basis of site trials.

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