Why calcium silicate board suspended ceiling construction cracks?
The wall knot at improper handling: not in accordance with the relevant requirements in the construction of atlas node, but the calcium silicate board and the wall at the junction of the caulking putty with scraping, and some also use copper paste to strengthen, do not leave any space to the shrinkage, cracking.
Improper treatment of deformation joint: at the deformation joint, there is no suture on the calcium silicate board ceiling, and the whole plate is connected directly. Although some deformation joints have been set up, the method of deformation joint is not correct. Only the joints are left at the faceplate, and the keel is not broken. Under the deformation of the structure, the calcium silicate board is easy to crack.
Plate storage improper: plate in the installation of construction, damp, wet, deformation, in the construction of natural drying conditions, produce shrinkage, cracks.
Ceiling keel installation spacing is too large: part of the keel mechanical performance has not reached the national standard indicators, plate installation after a greater degree of deformation. When the keel and the plate are installed, the joints are not staggered, so it is difficult to avoid stress concentration. When the whole plate is installed, screws are fixed in different directions at the same time, so that secondary stress is generated in the plate, and cracks are easy to occur.
