Tetraguard AS20
Introduced in 1985, TETRAGUARD AS20 admixture is
the first chemical admixture in the world to reduce drying
shrinkage in concrete and mortar, and the potential for
subsequent cracking.
TETRAGUARD AS20 admixture can be used in any
mortar and concrete applications where reduced
shrinkage is required.
TETRAGUARD AS20 has been 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 and offset tensile
stresses caused by drying shrinkage.
TETRAGUARD AS20 admixture functions by reducing
the capillary tension of pore water, a primary cause of
drying shrinkage.