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To: KyrosL who wrote (56065)10/9/2009 1:50:40 AM
From: Maurice Winn2 Recommendations  Read Replies (1) | Respond to of 218435
 
As an ex civil engineer, I'm sorely tempted to start ranting, but Bing is no doubt full of endless information. <concrete has a cement to other ingredients ratio of around 1:4.> In fact, the aggregate provides nearly all the volume and the cement and water fill in the nooks and crannies between the stones. The water is hopefully nearly all absorbed in rehydrating the cement.

Mqurice