After re-reading my post, I need to clarify something. The mold is clamped
to a board and filled from the top...oops!
>The slump number is the amount of "drop" the concrete makes out of a 12"
>mold. They use a 12" cone (mold) and fill it from the bottom. Then they
>invert the cone (pointy end up) and lift this cone off the concrete (ever
>make sand castles?). The "cone of concrete" will drop from the original
>12" to...say...7" (measured from the ground up). 12 - 7 = 5 Now you have
>a 5" slump! How is that for the technical explanation? :-) Go with the
>5" slump. Too much water is not good! It won't "hurt" the concrete, but
>man will it take forever to cure (concrete cures and does not dry!).