huh, the water squeezes out air pockets due to weight?
On Wed, 27 Jun 2007, chiliblindman wrote: > They have found that concrete poured under water for bridges is much > stronger and harder and last much longer than other concrete. After testing > to find out why they come up with the answer. > Pack damp sand in a box and remove the box and see how much weight it > holds when dry, try it with dry sand. Next pack wet sand and water it down, > it will settle and compress even more. After it dries, it is especially > adhesive to it's self and will withstand an extreme amount of weight. > When roads are made with concrete you will notice that they use more > water on it than is needed just to keep it wet from cracking. > ......................bob > > [Non-text portions of this message have been removed] > >
