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Cause analysis of MgO board inner partition wall crack

  • Categories:Blog
  • Author:
  • Origin:
  • Time of issue:2020-07-17 14:38
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(Summary description)

Cause analysis of MgO board inner partition wall crack

(Summary description)

  • Categories:Blog
  • Author:
  • Origin:
  • Time of issue:2020-07-17 14:38
  • Views:
Information

1. The performance of materials is not fully understood.

 

According to the performance test results of MgO board, the moisture absorption of MgO board is very strong, and the material performance is very unstable. The MgO board is prone to warpage and cracking after moisture absorption. Although MgO board has good impact resistance and fire resistance (the fire resistance level is a non combustible material), the thickness of MgO board is only 9 mm, so the material is prone to deformation and warpage after moisture absorption. If necessary moisture-proof measures are not taken in the process of transportation, storage and construction

 MgO board inner partition wall crack

After installation, if the board surface is exposed to humid air for a long time, it is easy to lead to high moisture content of the board. However, when the board loses water in the dry environment, it will produce shrinkage deformation. As the plate is fixed on the light steel keel by dovetail wire to prevent its deformation, cracks will appear on the wall surface. Therefore, the unreasonable selection of materials is the main reason for the problems in the project.

 

2. During the construction process, no effective crack prevention measures were taken, and the expansion joint was not cut according to the requirements of site construction, but the whole sheet was constructed. This is also one of the reasons for large area cracks on the wall surface.

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