3.6
Workability / Consistence
Designer
- Mix design approval
Builder
- Specification of consistence class (EN 206) or Target Value to suit placing method and conditions
- Normal placing (skip/direct)
- Pumping
- Monitoring arrangements/testing regime
- Tolerances (EN 206 NA)
- Reinforcement spacing implications
- Complex formwork - placing requirements
- High quality finish implications
- Delivery requirements
- Prevention of water addition on site
Producer
- Design of mix to suit consistence class requirements
- W/C ratio consistent with placing method
- Low W/C ratio – effect on fresh concrete properties
- Sufficient ‘open time’
- Surface finish requirements
- Weather conditions
- Special requirements (e.g. Flow )
- Control of water content /allowance for water in aggregates
- Admixture type / dosage / combinations
- Production testing