3.1
Strength
Designer
- Specification of Design strength class (from EN 1992 / 206 NA tables)
- Special/High strength mixes – mix approval process
- Flexural/shear strength requirements
- Specification of Identity test regime
- Consider strength requirements for design / installation of anchors / fixings
Builder
- Early age strength requirements
- Special /construction technique requirements
- Formwork stripping requirements
- Strength monitoring programme (7 & 28 Days)
- Process for addressing Non-conformities
Producer
- Cement content & W/C ratio
- Strength development rate / ratio (EN 206)
- Mix design requirements
- Conformity control
Further Guidance
Main Standards – Reference
I.S. EN 1992-1-1
I.S. EN 206
See NA strength classes
I.S. EN 13670
Other Guidance Documents
I.S. EN 12390 series
Testing hardened concrete
I.S. EN 13791
Assessment of concrete strength in structures
CIRIA Report C519
Action in the case of non-conformity in concrete structures