In order to effectively ensure the flatness of the concrete at the root of the wall or the central tube, the surface elevation of the concrete should be strictly controlled. When installing the root of the large formwork, a long lever of 3~4m should be used for flattening, calendering, and springing. , And stick a sponge strip. After the floor is flattened, rub the hair with a wooden trowel or press it with a plastic brush to pull the hair.
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