1, clean up the residual floating ash, oil and other debris and empty drum parts on the concrete wall, etc.
2. Remove concrete blocks, inclusions, hollows, etc. that split the roof, and repair them again.
3. It is required that the surface flatness deviation of the ceramic fiber board should not exceed 4nm when bonding, and if it is out of tolerance, polish the prominent concrete surface and repair the concave part (plaster with 1:2.5 cement mortar when the repair thickness exceeds 6mm, and use polymer bonding mortar when the repair thickness is less than 6mm); To ensure that the flatness of the whole wall is within 4mm, and the angle of yin and yang is square and smooth.
4. Mortar used in construction is divided into special bonding mortar and special adhesive for surface high temperature.
5. The weight ratio of mixing bonding mortar is water: mortar =1.5, and the mixing time is not less than 5min while adding water. The mixing must be sufficient and uniform, with moderate consistency and certain viscosity.
6. After the mortar is prepared, it must be left to stand for 5 minutes. Stir again before use. The mixed mortar should be used up within 1 hour.
7. In order to enhance the binding force between extruded board and bonding mortar, before pasting fiberboard.
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