About concrete construction in hot weather, the mistake is ()

Regarding concrete construction in hot weather, the mistake is that () is as follows:

B.noon is better.

Correct answer:

A. the mold temperature should be lower than 35℃

C. Moisturize and maintain in time.

D. It is recommended to use a white coated concrete transporter.

This topic investigates the construction technology of concrete engineering in high temperature weather. In concrete construction, when the average temperature of the day reaches above 30℃, measures should be taken according to the requirements of high temperature construction. Concrete shall be transported by white concrete mixer. Therefore, option d is correct. Concrete pouring into the mold temperature should not be higher than 35℃.

Therefore, option A is correct. Concrete pouring should be carried out in the morning or evening, and continuous pouring should be carried out. So option b is wrong. After concrete pouring is completed, it should be kept moist in time. Therefore, option C is correct.

Mass concrete with temperature difference between inside and outside of concrete exceeding 25 degrees Celsius during construction belongs to mass concrete as follows: The temperature difference between inside and outside of mass concrete refers to the surface concrete temperature and internal temperature.

If the temperature exceeds 25 degrees, there is a risk of cracking caused by temperature stress. If the surface layer is covered, it is isolated from the atmosphere. GB50 108-2008 clearly requires that the difference between the concrete center temperature and the concrete surface temperature should not be greater than 25 degrees, and the difference between the concrete surface temperature and the atmospheric temperature should not be greater than 20 degrees (it should be noted that,