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Reducing crazing

Avoiding the following can reduce the occurrence of crazing:
- over-rich or excessively wet mixes
- over-vibration
- excessive finishing.

Formwork with low absorbency should be avoided as this is much more likely to produce a surface layer with higher permeability than the main body of concrete. Continuous curing should be applied, avoiding cycles of wetting and drying.

Acknowledgement: The Concrete Society

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Crazing: power trowelled concrete floor slabs

TR22 Non-structural cracks in concrete