Bruce,

Have you ever heard how long it takes for a concrete slab to cure out completely?

I heard a SE once say it took like 30-40 years.

I know by doing termite treatments, when you take a rotor-hammer and start drilling through the slab the grindings will be light in color at first and the deeper you drill the darker they become. I personally always figured it was due to the moisture in the ground wicking up through the slab, but this SE said No its the original moisture in the slab that has not cured out.

What do you think?

rick