Pavement slabs roof slab etc.
Roof slab curing time.
The removing of shuttering related with span of the roof slab.
The enclosed area is continually flooded with water.
48 hours for sides of foundations columns beams and walls.
Are covered under water by making small ponds.
Water curing can be done after the slab pour by building dams with soil around the house and flooding the slab.
The indian standard is 456 2000 recommends that curing duration of concrete must be at least seven days in case of ordinary portland cement at least ten days for concrete with mineral admixtures or blended cements are used.
But to answer the question of how long does concrete take to set concrete setting time is generally 24 to 48 hours.
At seven days you should have concrete that is cured to 70 full strength or greater.
Are cured by spraying water.
Ideally the slab could be water cured for 7 days some builders on a tight schedule water cure for 3 days as this achieves approximately 80 of the benefit of water curing for 7 days.
In standard industrial cases full strength concrete is recognized at 28 days.
Curing time for concrete.
21 days for underside of beams arches above 6 meter span and up to 9 meter span.
At this point the neighborhood dog will not leave his footprints in it but you should keep it clear of heavy equipment during this time period.