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Construction CHEMICALS
Riteks SRA – 157
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GENERAL DESCRIPTION
Riteks SRA – 157 is a liquid shrinkage-reducing admixture, which can be used, in any Portland cement-based product to significantly decrease drying shrinkage. Riteks SRA – 157 is not expansive material, but rather functions by blocking capillaries of pore water, which is the major mechanism that causes drying shrinkage in concrete. Riteks SRA – 157 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.
APPLICATIONS & BENEFITS
FEATURES & ADVANTAGES
APPLICATIONS & BENEFITS- 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
Recommendations
APPLICATIONS & BENEFITS
Riteks SRA – 157 is recommended for use at a dose of 1.0% to 2.5% by weight of cementitious. For maximum effectiveness, use 2% by weight of cementitious. For example, a mix containing 600 lbs./yard, 2% equates to 12 lbs./yard or 1.5 gals. /yard. The shrinkage reduction is generally linear with the dosage within the recommended dosage range, so any dosage, within this range can be selected based on the degree of shrinkage reduction desired. Because local job conditions vary, contact your local Riteks technical service representative for further assistance if using this product outside the recommended dosage ranges or when combining with other admixtures
Technical Specifications
PACKAGING
275 Totes
Bulk deliveries
Compatability
Riteks SRA – 157 is compatible with all types of: Portland cement, Class C and F fly ash, silica fume, fibers, approved air-entraining agents, water-reducing, mid-range water-reducing, corrosion-inhibiting, silica fume, and superplasticizing admixtures. For best results, each admixture must be introduced separately into the concrete mix.
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