What is the repair process for the warping of terrazzo prefabricated panels? Do we need to dismantle the entire board?

The repair process for the warping of terrazzo prefabricated panels depends on the amplitude of the warping and the degree of damage, and it is not necessary to remove the entire panel. The specific process and analysis of whether to remove it are as follows:

1, Repair process with a lifting amplitude greater than 1mm
Chisel out the copper bars in the grid and lay them again
Operation steps: Chisel the raised area along the grid copper strip, clean the base layer, and then lay the terrazzo aggregate again.
Applicable scenario: The lifting range is large and the board deformation is severe, requiring thorough repair of structural stability.
Advantage: By re laying the aggregate, internal stress can be eliminated and subsequent warping can be avoided.
The necessity of dismantling the entire board
The situation that needs to be dismantled: If the warping is caused by the overall deformation of the board (such as insufficient compactness, unreasonable aggregate matching) or the settlement of the base layer, and local repair cannot guarantee flatness, the entire board needs to be dismantled.
Post removal treatment: When replacing the new board, it is necessary to ensure that the base layer is dry and flat, and use elastic backing adhesive (such as Hanshi 929) to enhance the bonding force and prevent hollowing.

2, Repair process with a lifting amplitude less than 1mm
Drilling and grouting with epoxy resin adhesive for bonding
Operation steps:
Drill 6-8 small holes (with a depth of about 60mm) at the raised area, remove dust from the holes and keep them dry.
Inject epoxy resin adhesive, fill the gaps, flatten with a heavy object, and maintain for 24 hours.
Fill the holes with cement mortar or repair with epoxy resin, and finally polish the surface layer.
Applicable scenario: The lifting range is small and the board structure is complete, requiring only local reinforcement.
Advantages: No need to dismantle the board, low cost and fast repair speed.
Terrazzo polishing and silicon infiltration vitrification treatment
Operation steps: After gluing, polish the surface and infiltrate silicon vitrifying agent to enhance wear resistance.
Effect: Restore surface smoothness and luster, extend service life.
3, Criteria for determining whether to dismantle the entire panel
No need to dismantle the situation
The lifting amplitude is small (<1mm) and the board has no structural damage.
The grassroots is stable, and the uplift is caused by weak local bonding or stress concentration.
After repair, the functionality can be restored through processes such as gluing and polishing.
Situation requiring demolition
Board problems: Insufficient compactness, unreasonable aggregate matching leading to high deformation rate, or defects such as cracks and corner drops in the board.
Grassroots problems: insufficient filling, uneven thickness of cushion layer, unstable structural settlement, etc.
Invalid repair: After partial repair, it still repeatedly lifts or the hollow area exceeds 5% of a single board.

4, Preventive measures and material selection
Choose high-performance adhesive backing
It is recommended to use Han Shi 929 non hollow elastic backing adhesive, which is elastic and adaptable to deformation, and has super strong waterproof performance to effectively prevent hollowing and cracking.
Key points of construction: the proportion of 929 lotion 1: cement 1 shall be used, the back of stone shall be evenly coated (about 1mm thick), and it shall be installed after being left for 24 hours for curing.
Control construction technology
Grassroots treatment: Ensure that the grassroots is dry (moisture content<10%), flat, and free of floating ash and oil stains.
Laying points: Reserve expansion joints to avoid warping caused by thermal expansion and contraction; Use dry and hard mortar for paving, compact and smooth.

Maintenance management: No one is allowed to enter within 24 hours after laying, and the maintenance period should not be less than 7 days to keep the surface moist.