Sika® Stabilizer-6018 TBM

Set accelerating admixture for cement or bentonite stabilized and retarded injection grouts

Sika® Stabilizer-6018 TBM 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.

  • 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)