SRA-157-EXT
RussTech shrinkage-compensating admixtures significantly decrease drying shrinkage in all Portland cement based mixtures. They are not expansive materials, but they function by blocking capillaries of pore water, which is the major mechanism that causes drying shrinkage in concrete. Shrinkage-compensating admixtures, when added to concrete at a rate of 2 % by weight of cementitious material, can reduce shrinkage (ASTM C 157) by up to 80% at 28 days of age and by up to 50% at one year of age.
SRA-157-EXT is a liquid shrinkage-reducing admixture, which can be used, in any Portland cement-based product to significantly decrease drying shrinkage. SRA-157-EXT is not expansive material, but rather functions by blocking capillaries of pore water, which is the major mechanism that causes drying shrinkage in concrete. SRA-157-EXT, when added to concrete at a rate of 2 % by weight of cementitious, can reduce shrinkage (ASTM C 157) by up to 80% at 28 days of age and by up to 50% at one year of age.
Advantages
- Can be used in Air Entrained Concrete
- High level of shrinkage reduction that can eliminate cracking due to drying shrinkage in restrained concrete
- Reduces potential for cracking
- Improves aesthetics
- Increases water tightness of the mix
- Improves durability of the concrete
- Reduces creep and curling of slabs
- Decreases carbonation at the surface of slabs