DaleaRetard
WATER-REDUCING INITIAL SET RETARDER
DaleaRetard is a high performance, ready-to-use liquid admixture, formulated from selected purity of lignosulphonates and modified polymers. Ingredients are factory premixed in exact proportions to minimise handling
Application
DaleaRetard retards the initial and final set of concrete. At the usual addition rate of 300mL / 100kg cementitious material it will extend the initial setting time of portland cement concrete by 2 to 3 hours at 21°C.
DaleaRetard is used wherever a delay in setting time is required to insure sufficient delivery, placement, vibration or compaction time, such as in:
- Hot Weather Concreting
- Transit Mix Concrete
- Prestressed Concrete
DaleaRetard is also used in special applications, as in bridge decks where it extends plastic characteristics of the concrete until progressive deflection resulting from increasing loads is completed
Water-Reducing Properties
Along with set retardation, DaleaRetard provides water-reduction (typically 8 to 12%) in a concrete mix. This water-reducing action of DaleaRetard produces greater plasticity and workability in the fresh concrete and the strength and permeability of the hardened concrete are measurably improved. DaleaRetard is designed for use on jobs where high temperatures make extended setting times desirable. It is recommended only when the primary purpose is to delay and control the setting time of concrete.