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ProductD• • Sheets *,,qr gcp applied technologies <br /> Addition Rates <br /> The addition rate range of 3 to 5 fl oz/100 Ibs (195 to 325 mL/ 100 kg) of cement or cementitious is <br /> typical for most applications. However addition rates of 2 to 7 fl oz/100 Ibs (130 to 455 mL/100 kg) of <br /> cement or cementitious may be used if local testing shows acceptable performance. Pretesting is required to <br /> determine the appropriate addition rate for desired performance. The optimum addition rate depends on the <br /> other concrete mixture components,job conditions, and desired performance characteristics. <br /> Compatibility with Other Admixtures and Batch Sequencing <br /> ZYLA® 630 is compatible with most GCP admixtures as long as they are added separately to the concrete <br /> mix, usually through the water holding tank discharge line. In general, it is recommended that ZYLA® 630 be <br /> added to the concrete mix near the end of the batch sequence for optimum performance. Different <br /> sequencing may be used if local testing shows better performance. Please see GCP Technical Bulletin TB- <br /> 0110,Admixture Dispenser Discharge Line Location and Sequencing for Concrete Batching Operations for <br /> further recommendations. <br /> Pretesting of the concrete mix should be performed before use, as conditions and materials change in order <br /> to assure compatibility, and to optimize dosage rates, addition times in the batch sequencing and concrete <br /> performance. For concrete that requires air entrainment,the use of an ASTM C260 air-entraining agent <br /> (such as DARAVAIR®or DAREX®product lines) is recommended to provide suitable air void parameters for <br /> freeze-thaw resistance. Please consult your GCP Applied Technologies representative for guidance. <br /> Packaging & Handling <br /> ZYLA® 630 is available in bulk, delivered by metered tank trucks, in totes, and in drums. <br /> ZYLA® 630 will freeze at about 28°F (-20C), but will be completely uniform after thawing and thorough <br /> agitation. <br /> Dispensing Equipment <br /> A complete line of accurate, automatic dispensing equipment is available. ZYLA ® 630 may be introduced to <br /> the mix through the water holding tank discharge line. The ZYLA®product line is formulated to be free of <br /> sediment. <br /> Specifications <br /> Concrete shall be designed in accordance with Standard Recommended Practice for Selecting Proportions <br /> for Concrete,ACI 211. <br /> The water-reducing admixture shall be ZYLA® 630, as manufactured by GCP Applied Technologies, or equal. <br /> The admixture shall not contain calcium chloride as a functional ingredient. ZYLA® 630 will not promote <br /> corrosion of reinforcing steel embedded in concrete. It shall be used in strict accordance with the <br /> manufacturers' recommendations.The admixture shall comply with ASTM Designation C494,Type A and D <br /> water-reducing admixtures. Certification of compliance shall be made available on request. <br /> Page 2 of 3 <br />