Improper concrete mix, concrete is too thick, it is difficult from vibration when the bubble is caused by hardening the surface of concrete structure surface causes cellular Ma.

• 混凝土配合比不当，混凝土过于粘稠，振捣时气泡很难排出，是造成硬化混凝土结构表面出现蜂窝麻面的原因。