35
30
25
20
15
10
5
0
Control
5
Air
10
15
16
17
18
19
20
21
22
23
March
a. Control concrete and heated air.
10
5
0
5
10
EY11L
Air
15
15
16
17
18
19
20
21
22
23
March
b. EY11L concrete and unheated shelter air.
20
15
10
5
0
5
10
EY11H
Air
15
20
15
16
17
18
19
20
21
22
23
March
c. EY11H concrete and outside air.
Figure 4. Thermal history of test concretes.
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