MasterLife SRA 21 - High performance shrinkage reducing agent
Formerly: Tetraguard AS 21
How does MasterLife SRA 21 work?
MasterLife SRA 21 is a ready to use liquid
admixture formulated to greatly reduce the
drying shrinkage of any concrete.
What is MasterLife SRA 21 used for?
MasterLife SRA 21 is recommended for all types of concrete where a reduction in drying shrinkage is required. Examples include:
- Slab-on-ground concrete.
- Concrete structures subject to marine
and/or chemical environments.
- Industrial pavements.
- Pre-stressed elements.
- Tunnel linings.
- Bridge girders.
- Watertight and water retaining structures.
- Concrete pipes.
- Manufactured concrete products.
What are the advantages of MasterLife SRA 21?
Pore water capillary tension is the major
contributor to the drying shrinkage of concrete.
MasterLife SRA 21 reduces the drying
shrinkage of concrete by reducing the capillary
tension of the pore water in concrete.
Reductions in drying shrinkage of up to 50%
have been obtained using MasterLife SRA 21.
The benefits derived from the reduction in drying
shrinkage include:
- Dramatic reduction in crack occurrence
caused by drying shrinkage.
- Increased joint spacing in concrete
pavements and slab-on-ground.
- Improved concrete durability.
- Longer service life.
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