Air-detraining admixture ASTM C494 Type S
NULAIR® 50 is a liquid air-detraining admixture that is used to reduce the level of plastic air in non air-entrained concrete. NULAIR® 50 weighs approximately 8.3 lbs/gal (1.0 kg/L). NULAIR® 50 does not contain intentionally added chloride.
NULAIR® 50 air detraining admixture, may be used wherever it is desired to decrease the plastic air content in non air-entrained concrete. This includes the following:
- Ready mix concrete
- Precast concrete
- Interior flatwork
- Architectural concrete
- Heavyweight concrete
- Polished exposed aggregate concrete
There is no standard addition rate for NULAIR® 50. Typical NULAIR® 50 addition rates range from 0.5 to 6.0 fl oz/100 lbs (30 to 100 mL/400 kg) of cementitious material. NULAIR® 50 dosage rates will be dependent on the level of air detrainment required. Pretesting of concrete should be performed to confirm dosage rates required to achieve desired concrete performance. Addition rates may vary depending on materials, job conditions and desired performance characteristics. Please consult your GCP Applied Technologies representative for information and assistance.
- Reduces plastic air in concrete
- Increases the unit weight of concrete
- Increases in compressive strength of concrete
- Decreases potential for rejected concrete
Compatibility with Other Admixtures and Batch Sequencing
NULAIR® 50 air detrainer 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 the product be added to the concrete mix near the end of the batch sequence for optimum performance. Please see GCP Technical Bulletin TB-0110, Admixture Dispenser Discharge Line Location and Sequencing for Concrete Batching Operations for further recommendations.
Pretesting of the concrete mix should be performed before use, and as conditions and materials change in order to assure compatibility, and to optimize dosage rates, addition times in the batch sequencing and concrete performance. Please consult your GCP Applied Technologies representative for guidance.
Packaging & Handling
NULAIR® 50 air detrainer is available in 275 gal (1040 L) totes, 55 gal (208 L) drums, and 3.5 gal (13 L) pails. The product can begin to freeze at 32°F (0°C).
A complete line of accurate, automatic dispensing equipment is available. Typically, NULAIR® 50 air detrainer is hand dosed at the job site.
Review product label and Safety Data Sheet prior to use.
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This document is only current as of the last updated date stated below and is valid only for use in the United States. It is important that you always refer to the currently available information at the URL below to provide the most current product information at the time of use. Additional literature such as Contractor Manuals, Technical Bulletins, Detail Drawings and detailing recommendations and other relevant documents are also available on www.gcpat.com. Information found on other websites must not be relied upon, as they may not be up-to-date or applicable to the conditions in your location and we do not accept any responsibility for their content. If there are any conflicts or if you need more information, please contact GCP Customer Service.
Last Updated: 2021-04-22