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©
Canadian Standards Association
Precast concrete — Materials and construction
November 2009
Table 2
Accelerated curing cycle
3EE
#LAUSE
Table 3
Heated concrete cycle
3EE
#LAUSE
Figure 1
Warpage of one corner of slab or panel
3EE
#LAUSE
(EAT TREATMENT CYCLE
-OISTURE CATEGORY
$RY
$AMP
Minimum holding period (delay) before application of heat and
maximum concrete temperature during the holding period
1 h at 30 °C 3 h at 30 °C or
4 h at 40 °C
Maximum heating rate of concrete, °C/h*
20
20
Maximum concrete temperature, °C
70
60
Maximum cooling rate of concrete, °C/h†
15
15
*
For structural low and semi-low-density concrete, the heating rate shall be limited to
10 °C/h
.
†
Cooling shall continue until the concrete temperature is not more than
20 °C
above the ambient
temperature.
(EAT TREATMENT CYCLE
-OISTURE CATEGORY
$RY
$AMP
Maximum temperature of the compacted fresh concrete in the form, °C 50
40
Maximum concrete temperature, °C
70
60
Maximum cooling rate of concrete, °C/h*
15
15
*
Cooling shall continue until the concrete temperature is not more than
20 °C
above the ambient
temperature outside the enclosure.
Level plane
Corner
warpage
Distance to nearest
adjacent corner
Distance to farthest
adjacent corner
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