Concrete Drying Conditions

[planemad]

My foundation trench was filled today (by builders) with C30 mix concrete the depth filled was 1200mm.
How long does this normally take to dry and how long is it normally left before it can be built on?

They have covered the concrete up with sheets of ply wood, are there any precautions to take with regards to the weather its going to be hot tomorrow 25degrees.

Many thanks

 

[cowboyontheloose]

tomorrow, dont wait 6 months as some donuts suggested for shrinking :

 

[planemad]

Builders are back Monday afternoon or Tuesday to start the building.
(depending on the Travis delivery slot)

 

[mater]

takes 28 days to reach its designed strength, but build on the next day when it is nice and green

 

[fastneattrowel]

takes 28 days to reach its designed strength, but build on the next day when it is nice and green

most do ,yet to see a house move after its layed 2 or 3 days later even get away with 1

 

[noseall]

You will be able to build on it within 24 hours.

The highest you could possibly build is up to dpc in any case. At 1.2m thick, the concrete will hardly feel it. The percentage of masonry loading against the massive amount of concrete will tell you this.