Treatment Method of Cracking of Cement Pressing Slab
Full batch processing
4.1 Seamlessly treated high-density fiber cement board surface can be pre-mixed with full batch of putty or other full batch of materials.
4.2 high-density fiber cement board surface batch should be carried out twice, the first pass of the thickness of about 2mm, the second pass the thickness of about 1mm.
4.3 After full batch processing, it is completely dry and polished with sandpaper.
Material Recommendation:
2. 1 seam putty recommended the main focus on the gap between the cracks and research and development of special high-strength filling paste.
2.2 Sealing belt requires lateral pull-off force of not less than 5.85KN / m o
2.3 Interface agent recommended WACKER (WACKER BS SM (1311) silicone or Dow Corning (Dow Corning DC520) water-soluble waterproof emulsion and other interface waterproof material.
1, seams before check:
1.1 Check the slit part of the screw to sink into the board surface 0. 5mm, the screw from the board edge 12 ^ -15mm, can not damage the edge of the board, the board should not have significant difference between high and low, if necessary, should be repaired, and then start seam construction The
1.2 must be checked to ensure that the plate and keel combination of dense, seamless.
1. 3 before the seam must be used to scrape the screw around the screw to clean, and then use the wet brush to clean the dust at the slit.
1.4 Check the material, no metamorphic agglomeration phenomenon, meet the requirements.
