Concrete doesn’t dry - it sets!
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More about the hydration reaction:http://iti.northwestern.edu/cement/mo...

Portland Cement Hydration:http://people.ce.gatech.edu/~kk92/hyd...

Calcium Silicate Hydrate:https://en.wikipedia.org/wiki/Calcium...

How concrete gets stronger and cures over time:https://courses.washington.edu/cm425/...

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