Product Data Sheet Show all documents

Sika® Stabilizer-6015 TBM US

LIQUID ACCELERATOR FOR CEMENT/BENTONITE STABILIZED & RETARDED INJECTION GROUTS

Sika® Stabilizer-6015 TBM US is a set and hardening accelerating admixture for cement / bentonite injection grouts, commonly used in backfilling operations during tunnel excavation with shielded TBMs.    During excavation, the shield leaves an empty ring space between the concrete lining and the excavated ground. Injection and filling of this space is commonly done with a cement / bentonite grout that is stabilized and retarded.

  • Allows pumpability of retarded and stabilized grout.
  • Stops segregation and bleeding after injection.
  • Ensures a controlled hardening of the injected grout.
  • Allows hydration of cement.
  • Ensures good mechanical strengths (comparable to ground strengths).
Product Data Sheet Show all documents

Usage

This product is normally used in tunnel excavation with shielded tunnel boring machines (TBMs).   This product is used for:
  • The re-activation of the setting properties of two component grouts.
  • Acceleration of the grout setting time allowing the hardening of an injected mix even if it has been retarded for 24-72 hours.

Advantages

  • Allows pumpability of retarded and stabilized grout.
  • Stops segregation and bleeding after injection.
  • Ensures a controlled hardening of the injected grout.
  • Allows hydration of cement.
  • Ensures good mechanical strengths (comparable to ground strengths).

Packaging

Bulk Supply

Custom packaging is available to suit specific project requirements

Color

Almost Colorless Liquid

Product Details

Product Information

Chemical Base

Silicate Base

Shelf Life

12 months from date of production

Storage Conditions

The product must be stored in original, unopened and undamaged packaging in dry conditions at temperatures between 41°F - 104°F (5 °C - 40 °C)

Always refer to packaging

Specific gravity

Approx. 1.32

Solubility

Soluble in water

pH-Value

11–12

 
System information

Compatibility

Compatible with Sika® admixtures and other Sika® products.

Contact your Sika STM Technical Representative for additional information.

Application

Consumption

Recommended Dosage

The correct dosage must be determined by preliminary testing. Pre-trials should be executed to confirm correct dosage with the equipment and
shotcrete that is intended to be used. Typical dosage range of Sika® Stabilizer-6015 TBM US is 6.1 - 19.9 US gal per cubic yard of grout (40 - 130 kg per cubic meter of grout). 
Application steps

MIXING

Addition of Sika® Stabilizer-6015 TBM US is done through a special injector that pushes the admixture into the grout lines at the end of the back of the shield.

The product must only be added to grout immediately before injection of the grout.

Conduct preliminary jobsite and laboratory trials to evaluate the setting time specific to the project.

Documents