Polyheed 1721 

POLYHEED 1721 is a chloride free, mid range water reducing admixture formulated to produce rheoplastic concrete.

Rheoplastic concrete is fluid concrete with a slump value of at least 200 mm, easily flowing but at the same time free from segregation, and having the same water / cement ratio as that of a non-slump concrete (25 mm) without additive. The slump retention characteristics of rheoplastic concrete allow the addition of POLYHEED 1721 at the batching plant.

POLYHEED 1721 meets ASTM C494 Type A and G Admixtures.

POLYHEED 1721 can maintain the workability of fresh concrete for 1-2 hours at 20oC. The precise workability duration depends on temperature, types of cement and aggregates, transport and dosages of admixture. Higher dosage provides longer duration of workability of fresh concrete.

POLYHEED 1721 is compatible with both water reducers and air entraining agents approved under ASTM specifications. When used in concrete, it should be dispensed separately into the concrete mix. Should it be used in conjunction with water reducing admixture, specific test information using proposed dose rates are required. Otherwise, extended retardation could result.