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.
Roofing cement cure time.
If you re using.
Do spray new concrete with water.
Fill small holes and cracks with roof cement.
At seven days you should have concrete that is cured to 70 full strength or greater.
This suggested length of time comes not from nrca but was garnered from the concrete industry s recommendation for the appropriate amount of time for concrete to cure and develop adequate compressive strength.
Water curing can be done after the slab pour by building dams with soil around the house and flooding the slab.
Concrete which is moist cured for 7 daysis about 50 stronger than uncured concrete.
Don t thin the cement.
But to answer the question of how long does concrete take to set concrete setting time is generally 24 to 48 hours.
Allow proper time to watercure slabs after concrete is placed the concrete increases in strength very quickly for a period of 3 7 days.
Clean dust dirt and debris from the area to be patched.
Work in dry weather if possible.
Typically the roofing industry has required a 28 day curing period prior to testing the deck for dryness and suitability for roofing.
Curing time for concrete in standard industrial cases full strength concrete is recognized at 28 days.
One of the most common methods for curing concrete is to hose it down frequently with water five to 10 times per day or as often as you can for the first seven.