Q: I’m considering pervious concrete for the driveway on an upcoming project. What exactly is pervious concrete? Does it require extra maintenance to keep it functioning?

A: Peter Zoni, sales manager at Cape Cod Ready Mix, in Orleans, Mass., responds: Pervious concrete is a mix of Portland cement, coarse aggregate, water, and admixtures. Because there is little or no sand in the mix, the concrete contains bigger voids than ordinary concrete. These voids let water and air pass through, allowing pervious concrete...

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