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Duane Craig
Duane Craig writes on:

Harness the benefits of pozzolans in your next project

9March10

If you haven’t heard of “pozzolans,” then you are missing out on a concrete idea that can make projects greener.  Thousands of years ago the Greeks and Romans built structures that are still standing today by incorporating pozzolans into the mix - literally into the mix.
The Romans used lime and a fine volcanic ash (pozzolana) to create [...]