Calcium Carbide testing and Silicates

[CC Solutions]

Floor curling results from the top drying faster than the bottom. A good design mix that limits the amount of free water will minimize the water in the lower portion of the slab which will help.

Good curing techniques will allow the top to stay wet for the first couple of days and the lower horizon will gain strength to resist curling. Then as the lower horizons dry over the first few months, the curling that occurs will relax and the floor will become flatter.

We had excellent results using concrete mixes that minimized the cement required, minimized the cement paste that needs water and creates all this movement.

It isn't the aggregate that is causing movement.

I see you added 'perform a single steel pass'... Be careful of that slippery slope. I like to tell the finisher I want a porous, absorptive surface, which will resemble sandpaper. We don't want a glassy black surface that looks like polished marble. They can finish the slab with combo blades even.