ETL 1110-2-365
31 Aug 94
Figure B-4.
Crack plot at day 143 of the middle wall half of the chamber monolith model
for the concrete placing temperature for lock con-
b.
Analysis results.
struction was 60 oF. Since cooling the concrete to
this temperature during the summer months would
(1) Temperature results. The results of the heat
require adding ice in place of water or including
transfer analysis should first be evaluated for the
liquid nitrogen to the mixture, it was determined that
three cases under consideration. Time-history tem-
higher placing temperatures should be evaluated to
perature plots are presented for three points in the
determine if costs associated with cooling the con-
slab in Figures B-19 through B-21. The initial obser-
crete could be reduced. Two additional analyses
vation on all three plots is that a noticeable difference
were performed. One analysis used a placing temper-
exists when the concrete is first placed due to the
ature of 70 oF, and the other used a placing tempera-
different placing temperatures for each case, but at
ture equivalent to the ambient temperature at the time
300 days very little difference exists between the
the lift was placed. The study was performed on the
three analyses. It should also be noted that while the
chamber monolith of the Olmsted project as shown in
general shape of the curves in all three figures follow
Figure B-1.
the shape of the ambient temperature curve
B-6
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