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ProductData applied technologies 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. Please consult your GCP Applied Technologies representative for guidance. Performance Air is incorporated into the concrete by the mechanics of mixing and stabilized into millions of discrete semi-microscopic bubbles in the presence of a specifically designed air-entraining admixture such as DARAVAIR® 1000.These air bubbles act much like flexible ball bearings increasing the mobility, or plasticity and workability of the concrete. This can permit a reduction in mixing water with no loss of slump. Placeability is improved. Bleeding, plastic shrinkage and segregation are minimized. Through the purposeful entrainment of air, DARAVAIRG 1000 markedly increases the durability of concrete to severe exposures particularly to freezing and thawing. It has also demonstrated a remarkable ability to impart resistance to the action of frost and de-icing salts as well as sulfate, sea and alkaline waters. Addition Rates There is no standard addition rate for DARAVAIR® 1000. The amount to be used will depend upon the amount of air required for job conditions, usually in the range of 4%to 8%. Typical factors which might influence the amount of air-entraining admixture required are temperature, cement, sand gradation and the use of extra fine materials such as fly ash and microsilica. Typical DARAVAIR® 1000 addition rates range from % to 3 fl oz/100 Ibs (30 to 200 mL/100 kg) of cement. Pretesting of concrete should be performed to confirm dosage rates required to achieve desired concrete performance. The air-entraining capacity of DARAVAIRG 1000 is usually increased when other concrete admixtures are contained in the concrete, particularly water-reducing admixtures and water-reducing retarders. This may allow up to % reduction in the amount of DARAVAIRG 1000 required. Concrete Mix Adjustment Entrained air will increase the volume of the concrete making it necessary to adjust the mix proportions to maintain the cement factor and yield.This may be accomplished by a reduction in water requirement and aggregate content. Dispensing Equipment A complete line of accurate automatic dispensing equipment is available. These dispensers can be located to discharge into the water line,the mixer, or on the sand. Packaging & Handling DARAVAIRO 1000 is available in bulk, delivered by metered tank trucks,totes and drums. Page 2 of 3