In cold weather conditions, the temperature of concrete should not be allowed to fall below ___________ for at least 3 days after its placing.

In cold weather conditions, the temperature of concrete should not be

1.	In cold weather conditions, the temperature of concrete should not be allowed to fall below ___________ for at least 3 days after its placing.
A.	5° C
B.	25°C
C.	15°C
D.	50°C
Answer» D. 50°C

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In cold weather conditions, the temperature of concrete should not be allowed to fall below ___________ for at least 3 days after its placing.

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