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Concrete Admixtures
Shrinkage Reducer
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Tetraguard® AS 20
Tetraguard AS20 shrinkage-reducing admixture is the first commercially
available chemical admixture developed specifically to reduce drying
shrinkage of concrete and mortar, and the potential for subsequent
cracking.
Tetraguard AS20 admixture has been used successfully in the Far East and
North American construction markets since its introduction in 1985.
Tetraguard AS20 admixture was developed to replace/enhance inorganic
expansive admixtures that were being used to prevent drying shrinkage
cracking. These expansive admixtures acted by inducing compressive
stresses in concrete to offset tensile stresses caused by drying
shrinkage.
Tetraguard AS20 admixture functions by reducing capillary tension of
pore water, a primary cause of drying shrinkage.
Features
Significantly reduces drying shrinkage by as much as 80% at 28 days, and
up to 50% at one year or beyond when 2% Tetraguard AS20 admixture by
mass of cement is used in the concrete mixture
Reduces
stresses induced from one-dimensional surface drying in concrete slabs
and floors
Reduces
compressive creep
Reduces
carbonation
Benefits
Reduces
drying shrinkage cracking and microcracking thereby improving
aesthetics, watertightness and durability
Reduces
compressive creep under drying conditions that minimizes prestress loss
Minimizes curling |
