Mapeplast R815 is a multi-usage admixture that when used at a low dosage, provides water-reduction with no impact on set-time. However, at higher dosages, while providing additional water reduction, it also delays set, and as such, Mapeplast R815 conforms to ASTM C494 Type A, B and D and CSA A23.1. Mapeplast R815 increases strength, and improves workability and finishing characteristics.