Basics & definitions
Sourced answers on basics & definitions, written for the person standing in front of the problem.
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1
What's the difference between concrete and cement?
Cement is the powdered binder inside concrete. Concrete is cement plus sand, gravel, and water — the finished material you pour, place, and stand on.
2How to make concrete
Concrete is cement, sand, coarse aggregate, and water. A common site proportion is 1:2:3 by volume, mixed to a 3–5 inch slump and cured, not just poured.