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Sika® Stabilizer-5010 TBM AE

Plasticising admixture with set retarding properties for use in annular grout Component A for TBM application

Sika® Stabilizer-5010 TBM AE is a liquid plasticizer which disperses and deflocculates cement particles whilst delaying the hydration process, thereby retarding the initial and final set. It can be used to improve workability without the addition of extra water, or to allow reductions in the free water content. Due to improved dispersion of the cement particles the process of hydration of Component A proceeds under the optimum conditions, leading to improved strength characteristics with or without reduction in free water.

  • The retarding action allows storage of the annular grout in the pumping lines and grout agitator tanks on the TBM for up to 72 hours depending on dosage.
  • Enables controlled extension of initial set of Component A.
  • Highly effective in low cement content high water cement ratio mixes where its use enables grout to be made more workable without loss in strength, density and durability
  • Allows a reduction in free water in the region of 5–12 %
  • The strength gain of annular grouts containing Sika® Stabilizer-5010 TBM AE is enhanced. After retardation of initial and final set, a more rapid hardening of the grout occurs, and the effect on stripping time is negligible.

 
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Usage

  • High flow, low cement content, high w/c ratio annular grout mixes for TBM tunneling.
  • Hot weather applications of grout where control of initial and final set is important.
  • Setting control of annular grout mixes for injection behind segmental tunnel linings.
 

Advantages

  • The retarding action allows storage of the annular grout in the pumping lines and grout agitator tanks on the TBM for up to 72 hours depending on dosage.
  • Enables controlled extension of initial set of Component A.
  • Highly effective in low cement content high water cement ratio mixes where its use enables grout to be made more workable without loss in strength, density and durability
  • Allows a reduction in free water in the region of 5–12 %
  • The strength gain of annular grouts containing Sika® Stabilizer-5010 TBM AE is enhanced. After retardation of initial and final set, a more rapid hardening of the grout occurs, and the effect on stripping time is negligible.

 

Packaging

Sika® Stabilizer-5010 TBM AE is available in bulk, 1000 L flowbins or 210 L drums.

Colour

Brown liquid

Product Details

Product Information

Shelf life

12 months from date of production

Storage conditions

The Product must be stored in original, unopened and undamaged sealed packaging in dry conditions at temperatures between +5 °C and +50 °C. Always refer to the packaging.

Specific gravity

~1.158 (+25 °C)

Total chloride ion content

Nil

(EN 934-2)

 

Application

Application Information

Compatibility

Sika® Stabilizer-5010 TBM AE can be used with all types of Portland cement including sulphate resisting (Type V). For use with other special cements, contact Sika Technical Department.

Sika® Stabilizer-5010 TBM AE is compatible with accelerators such as Sika® Stabilizer-6001 AE
Sika® Stabilizer-5010 TBM AE should not be premixed with other admixtures. If other admixtures are to be used in annular grouts containing Sika® Stabilizer-5010 TBM AE, they must be dispensed separately. Consult Sika Technical Department.
Consumption

Recommended dosage

Field trials should be conducted to determine the optimum addition rates of Sika® Stabilizer-5010 TBM AE.
As a guide to these trials, a dosage range of 3–5 % per m3 of backfill grout.

Dosages outside this range can be used where improved workability, increased water reduction and/or further set retardation are required.
Application steps

APPLICATION

Sika® Stabilizer-5010 TBM AE is added to the Component A mix.

Never add Sika® Stabilizer-5010 TBM AE to the dry cement. No extension to normal mixing time is necessary.

 

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