Foam Forms Speed Curing
To the Editor:
"Foam Foundation Forms" (12/93)
was an excellent article and answered
many questions raised by one of my current
projects. I have just one minor
clarification regarding curing.
Insulation does not cause concrete to
cure at a slower rate as the article states.
In fact, because the foam insulation
traps the heat of hydration, the concrete
cures faster and more importantly,
retains moisture to cure longer, resulting
in (as stated) greater strength.
Robert Randall, P.E.
Mohegan Lake, N.Y.
Cost-Plus Query
To the Editor:
I enjoyed your article on cost-plus
contracts ("Working Cost-Plus," 9/93),
but I felt unclear about the "guaranteed
maximum cost" part of the article.
Where does this figure come from?
Since the owner will want