How Long Does Concrete Take To Dry Before Rain. The is the commonly asked question was how long does concrete take to dry. A concrete driveway takes 24 to 48 hours to dry.
The bad news is that the surface of the concrete should not have been allowed to dry out for a week or more a time also referred to as the curing period. For the maximum strength concrete takes 28. Drying is critical when the flooring system will be installed over the concrete slab and if the slab is not dry when the floor is installed then the floor will be damaged by excess moisture.
Quick-set concrete is a dry concrete mix that has calcium chloride added.
Otherwise technically no problemThe rain drops can cause some pitting which is ok. It can then take up to 4 days to cure and harden to its maximum strength. Pour the concrete onto the existing damaged concrete in the same way and trowel to a smooth finish and hopefully there is no more rain to cause any damage. As mentioned before the concrete will gain its hardness and strength in twenty-eight days after the application.