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.
Roof concrete curing time.
But to answer the question of how long does concrete take to set concrete setting time is generally 24 to 48 hours.
The curing of concrete for longer duration increases the strength and durability of concrete structural members.
24 to 48 hours after inital set forms can be removed and people can walk on the surface.
From the above graph it is clear that concrete attained 50 of its design strength when it cured for 3 7 days.
Further to which continuation of curing is of no use.
Find nearby concrete contractorsthat can make sure your concrete cures properly.
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.
However after 28 days of the casting of a concrete 99 of the hydration process of the concrete is completed.
Curing time for concrete.
28 days at this point the concrete should be fully cured.
The minimum period for curing concrete to attain maximum strength is 28 days.
90 of concrete design strength achieved in 28 days.
In standard industrial cases full strength concrete is recognized at 28 days.
Typically the roofing industry has required a 28 day curing period prior to testing the deck for dryness and suitability for roofing.
7 days after partial curing traffic from vehicles and equipment is okay.
For a clear understanding check the below graph.
75 of compressive strength achieved in 14 days.