Concrete Admixture Dosage Guide
- Accelerator: 1-2% CaCl2 by weight of cement; speeds set 30-50%
- Retarder: 2-5 oz/cwt; delays set 1-4 hours
- Water reducer: 3-5 oz/cwt; reduces water 5-10%
- Superplasticizer: 6-20 oz/cwt; reduces water 12-30%
- Air entrainer: 0.5-3 oz/cwt; targets 4-7% air content