In a small thermo-power plant, an segregation accident occurred in the process of concreting a C15 turbogenerator foundation.

The second is control of workability of fresh concrete, if concrete isolation secretion of water, strictly control the vibration time, vibration rehabilitation must be timely.

The diabase gravel almost was laminated cleavage, so the quality of aggregate by impurities and crushing was bad, segregation and bleeding of concrete made by the aggregate was heavy.