1. Concept:
Generally, the process sequence of interior wall plastering is: basic treatment→ measuring vertical, setting squares, finding rules→ making plaster cakes→ wall plastering. But when the wall area is large, it is necessary to continue to make one or several gray bars with mortar along the ash cake made along the wall in the vertical and horizontal directions, this process is called punching bar, divided into horizontal punching bar and vertical punching bar, and the spacing between the two is also different.
Punching divides the wall into smaller plastering areas, which can not only reduce shrinkage crack defects caused by excessive plastering area, but also better the flatness of the seismic wall.
2. Material requirements and specifications:
Punching time: after hardening of the ash cake mortar;
Mortar material: punching mortar can be the same as plastering mortar, and construction shall be carried out according to the design when otherwise specified in the design;
JGJT 220-201 Technical specification for plastering mortar
↘↘ Vertical reinforcement: The spacing between the two vertical reinforcements should not be greater than 1.5 meters
↘↘ Transverse bars: The spacing between the upper and lower punch bars should not be greater than 2m;
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