‘Crete at Last!

The concrete finishers arrived at 7 am this morning, and the pump lady showed up shortly thereafter. The first of two concrete trucks (this pour is about 17 cubic yards) rolled in around 7:30.

Here is a short time-lapse view of the end of the first truck’s worth of concrete being poured.

One question that has come up is how long it will take for the concrete to set/cure/dry. “Setting” is the process of the concrete hardening to the point of being able to be floated to a smooth finish; generally speaking this takes several hours, more or less. “Curing” is the chemical process of the concrete fully hardening; after a week or so the concrete is around 70% cured and can safely be walked on, but it takes a month to reach 100%. It is still not “dry”, however, as that process takes, by rule of thumb, one month for each inch of thickness. So this slab won’t be fully dry until spring.

I intend to stay off this slab for at least a week. I am not yet sure whether I need to wait a month or 5 months before putting the sealant on it, more research is needed.

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