Curing cement based products
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How do you cure freshly laid concrete?
It is important to moisten the surface and edges of the slab for up to 7 days. This provides a continuous supply of moisture to provide a better surface quality. Curing occurs to ensure that the hardened surface abrasion is developed and dusting is reduced.
Protection should start as soon as the final surface finish is produced and not the next day.
This can also be achieved by covering the slab with black plastic. Care should be taken to ensure that covering the slab does not mark the freshly poured concrete. Protection of coloured concrete slabs must be considered. If polythene sheets are in direct contact with the concrete variable colour of the surface due to hydration staining may occur and this is not possible to correct at a later stage.
Alternatively, mist spray the slab at least twice daily for up to 7 days as it is important that the slab does not dry out before the cement has fully hydrated.
How do you cure freshly applied render?
Where render has been applied to a masonry surface, to prevent cracking it is vital keep the rendered surface moist for a period of time. Spray the surface with a hose on mist spray 24 hours after the wall is finished and repeat this for 5 days in the early morning and evening.
It is not advised to cure render that has been applied to blueboard or fibre cement sheeting.