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M10 Cement based levelling/ wearing screeds

TYPES OF SCREED

115 CEMENT:SAND LEVELLING SCREEDSgenerally
• Substrate: Site specific.
• Screed construction: Site specific.
- Reinforcement for crack control: Site specific.
• Thickness
- Nominal: Site specific.
- Minimum: Site specific.
• Mix:
- Proportions (cement:sand): To BS 8204-1.
• In situ crushing resistance (ISCR) category: A (3 mm maximum indentation).
- Mass of test weight: 4 kg.
• Flatness/ Surface regularity class: clause 355.
• Finish: Smooth floated, as clause 530.
- To receive: Site specific.
• Other requirements: Site specific.

120 FINE CONCRETE LEVELLING SCREEDSgenerally
• Substrate: Site specific.
• Screed construction: Site specific.
- Reinforcement for crack control: Site specific.
• Thickness:
- Nominal: Site specific.
- Minimum: Site specific.
• Mix:
- Proportions (cement: total aggregate): To BS 8204-1.
- Sand to coarse aggregate: To BS 8204-1.
• In situ crushing resistance (ISCR) category: A (3 mm maximum indentation).
- Mass of test weight: 4 kg.
• Flatness/ Surface regularity class: clause 355.
• Finish: Smooth floated, as clause 530.
- To receive: Site specific.
• Other requirements: Site specific.

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