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Shrinkage-compensating concrete

Concrete Expansive Agent

A U-type expansive additive for selected concrete and grout systems where controlled expansion or shrinkage compensation is required.

PowderU-typeConcrete and grout
Concrete Expansive Agent

Product role

Application context

A U-type expansive additive for selected concrete and grout systems where controlled expansion or shrinkage compensation is required.

Trial requirement: Expansion behavior is highly dependent on restraint, water-binder ratio, temperature and curing. Confirm the current method and trial data.

Technical overview

Catalogue reference information

Catalogue typeU-type
Catalogue reference dosage8–10%
Additional mixing time30–60 seconds
Catalogue curing referenceWater curing for 14 days

Reference values are transcribed from supplied company material. Request the current grade specification before purchasing or commercial use.

Information to include with your inquiry

Application

Concrete, mortar or formulation route.

Target

Required performance and local standard.

Materials

Cement, binders and other admixtures.

Destination

Country and required documents.

Buyer-oriented technical selection

Expansive-agent selection

Typical evaluation scope

Shrinkage-compensating concrete, grout and restrained members.

Factors that change performance

Restraint level, dosage basis, water-binder ratio, temperature and moist-curing duration.

Recommended verification

Measure expansion and strength under the intended restraint and curing regime.

Documents and evidence

Ask for the current grade specification and batch documentation. Review available company certificates, test evidence and supplier batch-report scope separately.

Quality & documents →

Grade-specific buying brief

Specify the expansion test, not only the additive percentage

Tell us whether the requirement concerns shrinkage-compensating concrete, grout or another cementitious system. Include the specified expansion method, restraint condition and measurement ages. A result from a different curing or restraint arrangement is not a direct demonstration that the proposed mixture meets your requirement.

Before comparing the catalogue percentage with a quotation, confirm its denominator and whether the additive replaces part of the binder or is additional material. The catalogue mixing and curing references need confirmation in the current grade instructions. They are not a universal site procedure. The responsible technical team should agree the application and acceptance plan before scale-up.

Details for a matched sample and quotation

  • Application: concrete/grout and intended shrinkage-compensation objective
  • Test brief: expansion method, restraint, ages and curing conditions
  • Specification: current grade, composition declaration and dosage basis
  • Commercial brief: sample, packaging, quantity and destination

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Request the current product specification

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Expansive agent or shrinkage-reducing admixture?

Specify which product function your requirement calls for before requesting a replacement.

Are these the same type of admixture?

No. An expansive additive is selected for a shrinkage-compensating system involving controlled expansion. A shrinkage-reducing admixture is a different functional category. ACI's educational discussion distinguishes these approaches; the names do not establish interchangeable chemistry, dosage or performance. This page lists a U-type expansive additive, not a confirmed shrinkage-reducing liquid grade.