在混凝土预制构件的生产过程中,由于骨料粒径过大或粗、细颗粒级配不好,混凝土的和易性差,模板漏浆、振动器移动间距过大、振动延续时间短等多方面的原因,使混凝土构件表面产生蜂窝、麻面、露筋和空洞等缺陷。这些缺陷,不仅影响建筑物的外观,严重时还将缩短建筑物的使用寿命,在吊装过程中,也会发生安全事故。因此,在混凝土构件拆模后,如果发现混凝土表面有缺陷,应及时提出修补 In the production process of prefabricated concrete parts, due to the large size of coarse aggregates, poor coarse-grain gradation, poor workability of concrete, stencil leakage, excessive moving distance of vibrators, and short vibration duration, etc. The reason is that the surface of the concrete member has defects such as honeycomb, hemp surface, exposed ribs, and voids. These defects not only affect the appearance of the building, but also shorten the service life of the building in serious cases. During the lifting process, safety accidents also occur. Therefore, if the concrete surface is found to be defective after the concrete member is removed from the mold, repairs should be made in time.