3.14
Weather Effects (hot & cold)
Designer
- Specify limits for placing (or compliance with specific standard)
- Considerations for strength development, curing etc.
- Mix design – flexibility in approval of mixes for changing conditions
Builder
- Precautions required for either hot or cold weather
- Protection of cast concrete
- Temperature recording - ambient
- Temperature monitoring – internal concrete levels
- Effects of drying/cooling winds
- Erection of wind-breaks
- Selection of suitable curing method and materials
- Availability of frost blankets
- Pumping in hot weather - precautions
- Mix design – special requirements
- Min and Max temperature limits for pouring
- Striking time effects / constraints
- Review weather forecast/records
- Plan for varying site conditions (mid to hi-rise)
Producer
- Precautions with stored materials ( aggregates, water, cement, admixtures)
- Mix design – special requirements (use of cement type, additions, admixture dosage)
Further Guidance
Main Standards – Reference
I.S. EN 206 + NA
Clause 5.2.9 & NA.2.9