Thank you for the article "Better Garage Floors" (5/11), which contains most of the advice I've presented to clients for the last 20 years on making better concrete. I offer one more point of advice and a couple of lessons from experience.

The photo of concrete delivery shows it coming directly out of the chute of a ready-mix truck, which is excellent. One of the best ways to end up with cracks throughout hardened concrete is to use a pea-gravel mix that can be pumped through a hose. The huge portion of sand in a pea-gravel mix requires a lot of extra water just to wet all the...

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