Corner guards stretching is applied on the wall

Now many buildings have insulation layers on their exterior walls, but there are gaps between the insulation boards. Filling the gaps with mortar can easily cause regular cracks on the surface of the plaster mortar. Because the bonding area of the insulation board is too small, hollowing during the pasting process will also affect the bonding strength. For example, obvious hollowing may cause cracks on the surface. The plaster mortar layer is too thin to cover the insulation board. After applying the paint corner guards, obvious traces of Profile Pvc and anchor bolts are likely to appear. The plaster mortar layer is too thick or the second layer of plastering is applied before the first layer of plaster mortar is completely dry, which is prone to shrinkage cracks.

In the external wall insulation system, Profile pvc with a certain alkali resistance should be used. If a Profile pvc self-insulation nail with a certain zirconium content is used to stick the corner guards, the alkali resistance of the Profile pvc and the long-term stability of the entire external wall insulation system can also be greatly improved. This type of product plays a great role in improving the strength of the entire system.
If the corner guards node does not slip when it is tensile, but the tensile strain is large, it will also cause the plastering mortar to crack at an early stage of the exterior wall insulation nails.
The tensile strain of the corner guards includes the strain at the early stage of tension and the strain at fracture, which can be expressed by the tensile force at elongation of 0.25%, 0.5%, and 1.0%, as well as the tensile force (breaking strength) at fracture, and the fracture strain.
If the corner guards node slips when it is tensile, the stress at the initial stage of force is mostly borne by the plastering mortar, resulting in cracks.
The test method for node strength is: cut a 330mm×50mm test strip along the weft direction (the weft yarn must be an odd number), cut all the yarns on both sides about 150mm away from the end of the test strip (need to be cut in the center of the node), leaving only the middle weft yarn, and after the insulation bracket is 50mm (or 6 nodes apart), cut the middle weft yarn, and do a tensile test on the test strip on a tensile testing machine. The testing machine clamps the central weft yarn at one end and all the yarns at the other end, and reads the force (N) pulled out of the yarn.