Knowde Enhanced TDS
Identification & Functionality
- Product Type
- Technologies
Features & Benefits
- Special Feature
- Polarset® provides set time acceleration and early strength development similar to that provided by calcium chloride, but without the potential corrosive effects. Polarset® can, therefore, be used where potential corrosion of embedded or stressed steel must be avoided.
- It can also be used in concrete that is to be placed on steel clad or zinc coated steel decks where corrosion must be similarly avoided.
- Advantages
- Designed for cold weather concreting at temperatures as low as 20°F (-7°C).
- Completely non-corrosive.
- Reduces set time and increases early strengths.
- Can be used at high dosages.
Applications & Uses
- Markets
- Compatible Substrates & Surfaces
- Applications & Uses
- Polarset® is specially formulated to reduce concrete setting times and increase early strengths for concrete in very cold conditions and may be used to reduce the time that concrete must be protected against freezing in ambient temperatures as low as 20°F (-7°C).
- For conditions not subject to freezing, Polarset® may be used to speed finishing operations and/or form removal, leading to savings in concrete construction costs.
Technical Details & Test Data
- Performance
In concrete mixes, Polarset® accelerates the chemical reaction between Portland cement and water. It speeds up the formation of gel, the binder that bonds concrete aggregates together. Accelerated gel formation in turn shortens the setting time of concrete, compensates for the set-slowing effects of cold weather and contributes to the development of higher strengths. Gel formation promotes heat generation within the mix, helping to protect the concrete from freezing during the critical first hours after placement.
- Compatibility
- Polarset® is compatible with most GCP admixtures as long as they are added separately to the concrete mix, usually through the water holding tank discharge line. In general, it is recommended that Polarset® be added to the concrete mix near the end of the batch sequence for optimum performance. Different sequencing may be used if local testing shows better performance.
- Polarset® should not come into contact with any other admixture before or during the batching process, even if diluted in mix water. Pretesting of the concrete mix should be performed before use, as conditions and materials change in order to assure compatibility, and to optimize dosage rates, addition times in the batch sequencing and concrete performance.
- For concrete that requires air entrainment, the use of an ASTM C260 air-entraining agent (such as Daravair® or Darex® product lines) is recommended to provide suitable air void parameters for freeze-thaw resistance.
- Mix Adjustment
Since Polarset® may be used at high dosages, the concrete producer should account for the water contained in the Polarset®. Each gallon of Polarset® added to a concrete mix will contribute 6.5lbs (0.78kg/L) of water to that mix.
- Addition Rates
The amount of Polarset® used will depend on specific job conditions, on local materials and on the degree of set acceleration and early strength development required. Typical addition levels range from 8 to 60 fl.oz/100 lbs (520 to 3910 mL/100 kg) of cement, but levels as high as 100 fl.oz/100 lbs (6520 mL/100 kg) of cement can be used. For freeze protection purposes typical addition rates are between 60 to 80 fl.oz/100 lbs (3910 to 5220 mL/100 kg) of cement.
- Specifications
- The set-accelerating admixture shall be Polarset®, non-corrosive, non-chloride set accelerator, as manufactured by GCP Applied Technologies. The admixture shall be used in strict accordance with the manufacturers’ recommendations. The admixture shall comply with ASTM Designation C494 Type C and will not contain purposely added chlorides or contribute to steel corrosion. Certification of compliance will be made available upon request.
- Concrete shall be proportioned in accordance with Recommended Practice for Selecting Proportions for Normal Weight Concrete, ACI 211.1 or Recommended Practice for Selecting Proportions for Structural Lightweight Concrete, ACI 211.2, or in accordance with ACI 318.
- For use in freeze protection, request sample specification available from your GCP Engineering Services representative.
Packaging & Availability
- Packaging Type
- Packaging & Availability
- Polarset® is currently available in bulk quantities by GCP metered systems, or in totes and drums.
- A complete line of accurate dispensers is available.
Storage & Handling
- Handling
- Polarset® may be introduced on the sand, in the water, or at the end of the batch cycles. Similar to all concrete admixtures, Polarset® should not come in contact with other admixtures prior to entering the concrete.
- Polarset® freezes at approximately -10°F (-23°C), but its set acceleration, strength gain and non-corrosive properties are completely restored by thawing and thorough agitation.