On Thu, 12 Apr 2007 19:05:28 -0400, "Joseph Meehan"
wrote:
BTW the amount of water in the mix is not, or should not, be dependent
on desired workability, There are specific ratios and messing with them
will reduce the strength of the final product. Water becomes part of the
concrete. With a proper mix very little evaporates.

Might be the Discovery Channel showing the bridge pour below the
Hoover Dam. Said to be the largest single pour; ever?

Trucks lined up and up. One person's job to check the mix on every
truck. They even moved trucks up ahead of the line, timing travel,
sitting time, etc. Great show.

--
Oren

"The voices in my head may not be real, but they have some good ideas!"