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430 HEAVE PROTECTION generally
• Location:
- Beneath beams and raft;
- Beneath capping concrete structures to piles ;
- Beneath existing foundation;
- Beneath needles;
- Both faces of underpinning blocks;
- Both sides of beams;
- Inside face of underpinning blocks;
- Inside face of underpinning blocks and existing below ground structure; and
- Sides of needles.
• Type: Compressible board as section E20.
• Thickness: site specific.
• Features: site specific.

435 IN SITU CONCRETEgenerally
• Standard: To BS 8110-1 or BS EN 1992-1; site specific.
• Concrete: Designed as section E10.
- Immature concrete: Protect from drying, frost and loading for a minimum period
of 7 days.
- Extend period to allow for inclement weather.
• Cover to reinforcement (minimum): as BS 8500-1 .
- Top face: as BS 8500-1.
- Faces cast against as BS 8500-1.

440 MAKING CONCRETE GENERALLY
• Standard: To BS 8500-2.
• Exchange of information: Provide concrete producer with information required by
BS 8500-1, clauses 4 and 5.
• Other requirements: Project compressive strength testing of concrete filling to piles
required as SPERW, clause B19.8.

450 DESIGNED CONCRETE FOR PILE FILLINGgenerally

• Embedded metal: site specific.

• Compression strength class (cylinder/ cube minimum): site specific.

• Target density (oven-dry): Normal.

• Fibres: site specific.

• Aggregates:

- Size (maximum): site specific.

- Type/ Density: Normal weight.

- Coarse recycled aggregates: site specific.

- Additional aggregate requirements: site specific1.

• Design chemical class: site specific.

• Limiting values for composition:

- Water:cement ratio (maximum): site specific.

- Cement/ Combination content (minimum): site specific.

- Cement/ Combination content (maximum): site specific.

- Air content in situ (minimum): site specific.

• Consistence class: site specific.

• Permitted cement/ combinations: site specific.

• Chloride class: site specific.

• Admixtures: site specific.

• Additional requirements: site specific.

RotF generic (intermediate) NBS 2014 6118-AEW-XX-XX-NBS-A-01