Engineering of concrete structures is a continuously evolving process. Invention and development of new construction methods place increasing demands on the building materials. Concrete producers face this technological challenge daily alongside other factors such as economy, ecology, raw material and energy costs and logistical complexity. In the duration of the whole construction process, time itself is an increasingly important factor.

Sika provides a wide range of concrete admixtures with innovative options for concrete mix design, whether it's for substantially reducing the water content of a mix (e.g. with Sika® ViscoCrete), using a more economical mix design or achieving sufficient early strength. Sika's concrete admixtures help you meet the challenges of modern concrete technology and the construction business.

Explore Our Ready Mixed Concrete Solutions

Superplasticisers

Water Reducers

Air Entrainers

Accelerators

Set Retarders

Expansion Agents

Cavex®

Cavex®

EXPANSION AGENT FOR MASONRY INFILL AND GROUT INJECTIONS
  • Eliminates plastic settlement in the grouting mix
  • Produces a controlled expansion before initial setting. As porous masonry blocks absorb water from the grout the plastic expansion maintains a contact pressure at the interface until the blockfill starts setting. The blockfill can then bond with the masonry unit to become a composite structure
  • Provides improved bond between hardened masonry blockfill and both the reinforcement and inner surfaces of the masonry cells
  • Provides a volume increase to wet mixes ‐ helping to fill voids in tunnel linings, cable ducts, etc.
  • Eliminates the need for revibration ‐ enabling grout lift height limitations to be relaxed, as allowed for in the NZ Masonry Filling Standards
  • Produces a stable and plastic grout ‐ prevents the upward movement of bleedwater which would otherwise become trapped underneath the lower faces of reinforcement and other projections.