在现场预制混凝土构件时,有的施工人员为了节约水泥或材料,使用油毡代替水泥胎模面层和木模(见图)。当构件起吊后,底胎模上的油毡,大面积粘在构件的底面,不易铲下, 同时,构件的底面出现很多的鼓包。这样做既浪费了大量的油毡,又要花费很多人工去清铲凿平,造成构件表面 When precasting concrete components on site, some construction workers use linoleum to replace the surface layers of the cement tires and wood molds (see figure) in order to save cement or materials. When the component is lifted, the linoleum on the bottom tire mold adheres to the bottom surface of the component in a large area and is not easy to shovel. At the same time, many bulges appear on the bottom surface of the component. This will not only waste a lot of linoleum, but also take a lot of manual work to clear the shovel, causing the surface of the components.