Construction chamfering process
When pouring concrete, remove the floating slurry on the surface, and make a “quick insertion and slow pull” when vibrating. In order to prevent delamination, segregation and vibration of the surface layer, the vibrating time is 15- 20 seconds, depending on the surface of the concrete, the level is no longer significantly sinking, no more bubbles appear, and the surface is generally floating.
The concrete foundation chamfering shall be fully vibrated 3 times, the vibrating tool shall be a small vibrating rod, and the first vibrating shall be carried out synchronously with the concrete foundation vibrating, and a large number of bubbles and blisters in the concrete shall be taken out, and if necessary, the same number of concrete may be used. The stone is stuffed on the concrete surface and chamfered; the second vibrating is carried out when the base surface is flattened after the casting is completed, and the chamfered portion is repeatedly inserted with small steel brazing, taking care not to damage the magnetic lines, the vibration is mainly Residual bubbles and blisters attached to the chamfered portion when the basic vibrating is extracted, the vibrating should be evenly inserted, and inserted slowly and slowly; the third vibrating is carried out before the surface is received, and if necessary, the stone used for the same type of concrete can be used for packing. At the chamfered concrete surface, use the wooden closing tool to repeatedly smash and slowly close the top surface of the column to completely extrude the bubbles and blisters in the chamfered portion, and make the concrete dense at this place to avoid the phenomenon of empty drum.
In addition, the slump, workability and the incorporation of water reducer of concrete have certain influence on concrete vibrating. The appropriate admixture can be selected, the concrete mixing time can be appropriately increased, and the slump can be appropriately increased. While conducive to concrete vibration, it has certain benefits in reducing the generation of concrete bubbles.