The influence of water reducers on durability and workability can never be under estimated. A durable concrete means a low water to binder ratio combined with specially selected constituent materials in the right quantity adjusted according to the environmental, ambient conditions and performance requirements.
Water reduction limits in practice
When considering low water content to increase strength and durability, the performace requirements must be balance with workability requirements. This must be balanced with the method of application and workability time which can only be achieved with the right admixture. Admixture which functions to reduce the amount of water in the concrete mix while still getting the same workability / slump.