The operation of the mandrel vibrating cement pipe machine in summer needs to pay attention to the fact that the concrete is simply limited by mixing. What points should be paid attention to in the construction of the cement pipe machine in summer:

　　1. The concrete strength shall not be lower than C40, and the concrete strength shall not be lower than C50.

　　2. For concrete materials, concrete cannot be placed for a long time when the ambient temperature is higher than 30°C. The concrete placement time is 45 minutes, and when the ambient temperature is 20-30°C, the placement time is 60 minutes.