Difference between revisions of "12.9 - Surface finish"
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| − | + | The concrete finish should be specified taking into consideration the proposed use of the floor slab and any surface finishes being applied. The slab finish may require additional surface preparation to facilitate the installation of some floor/roof finishes, advice should be sought from the finishes supplier. Where curing membranes are applied this must also be checked for compatibility with the subsequent applied finishes. | |
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| − | + | '''Skip/Easy float finish''' | |
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| + | Normally a ‘trowel’ finish is applied to suspended upper floor concrete using a skip/easy float (defined as ‘Basic’ in 4th edition of the National Structural Concrete Specification for building construction). It should be noted that this type of surface finish is likely to leave localised ridges, reinforcement ripple, surface laitance and a mottled effect in the final surface appearance. These areas may require some minor remedial attention prior to receiving subsequent floor finishes. | ||
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| + | Skip/Easy float finish Fig.12.9a | ||
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| + | Skip/Easy float finish Fig.12.9b | ||
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| + | Pan finish Fig.12.9c | ||
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| + | Pan finish Fig.12.9d | ||
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| + | '''Pan or Powerfloat finish''' | ||
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| + | These can be provided (respectively defined as ‘Ordinary’ or ‘Plain’ in 4th edition of the National Structural Concrete Specification for building construction), although it must be specified in the context of the previous deflection section i.e. powerfloating will make the surface appear smoother and flatter, but not level to datum. Restrictions on working hours, particularly in built-up areas, may prevent the option of these types of finishes being provided. | ||
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| + | Polished finish Fig.12.9e | ||
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| + | Polished finish Fig.12.9f | ||
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| + | Refer to 'Concrete Society Technical Report No.75 - Composite slabs using steel decking' for more information | ||
Revision as of 15:06, 25 January 2017
Back to main Contents page
The concrete finish should be specified taking into consideration the proposed use of the floor slab and any surface finishes being applied. The slab finish may require additional surface preparation to facilitate the installation of some floor/roof finishes, advice should be sought from the finishes supplier. Where curing membranes are applied this must also be checked for compatibility with the subsequent applied finishes.
Skip/Easy float finish
Normally a ‘trowel’ finish is applied to suspended upper floor concrete using a skip/easy float (defined as ‘Basic’ in 4th edition of the National Structural Concrete Specification for building construction). It should be noted that this type of surface finish is likely to leave localised ridges, reinforcement ripple, surface laitance and a mottled effect in the final surface appearance. These areas may require some minor remedial attention prior to receiving subsequent floor finishes.
Skip/Easy float finish Fig.12.9a
Skip/Easy float finish Fig.12.9b
Pan finish Fig.12.9c
Pan finish Fig.12.9d
Pan or Powerfloat finish
These can be provided (respectively defined as ‘Ordinary’ or ‘Plain’ in 4th edition of the National Structural Concrete Specification for building construction), although it must be specified in the context of the previous deflection section i.e. powerfloating will make the surface appear smoother and flatter, but not level to datum. Restrictions on working hours, particularly in built-up areas, may prevent the option of these types of finishes being provided.
Polished finish Fig.12.9e
Polished finish Fig.12.9f
Refer to 'Concrete Society Technical Report No.75 - Composite slabs using steel decking' for more information
Other items within 12.0 - Concrete:-
- 12.1 - Site considerations
- 12.2 - Temporary propping
- 12.3 - Cleaning the decking
- 12.4 - Damaged decking
- 12.5 - Construction joints
- 12.6 - Reinforcement drawings and bending schedules
- 12.7 - Concrete mix requirements
- 12.8 - Placement
- 12.9 - Surface finish
- 12.10 - Surface flatness
- 12.11 - Curing
- 12.12 - Post-installation characteristics
