Crack control measures of exterior steel structure warehouse

The connecting way of thermal insulation layer and protective layer and structure layer, currently has the following kinds: connecting rod bracket;Inclined rod bracket;Long screw;Adhesives. The above four kinds of connection methods have their own characteristics, but the comprehensive comparison, the former three construction more troublesome the fourth scheme involving the problem such as compressive strength and durability, therefore recommend the following four kinds of simpler scheme: nail;Expansion bolt;Embedded bar or plastic reinforcement scheme;Glue, nail combining with solutions. This scheme not only construction is convenient, but also has good durability.

Second, to prevent and remove the protective layer and act the role of surface cracks, the measures to reduce the protective layer stress concentration and contraction stress.
Protective layer and act the role of surface cracks mainly has the following several reasons:
1.protective layer and the compressive strength of insulation layer is low or appear empty drum;
2.the protective layer and act the role of surface shrinkage deformation is larger, leading to cracks;
3.because the Windows and doors hole in stress concentration, which leads to the protective layer and act the role of surface cracks.
Aimed at several of the major causes of the cracks, should take the following measures:
4.the steel mesh or use wire mesh sandwich rock wool board enhancement layer, on the one hand, steel mesh can strengthen structural layer and insulation layer and protective layer connection, on the other hand can also be dispersed protective layer and the surface of the shrinkage stress and stress concentration, so as to achieve the purpose of reduce and prevent the cracks.At the site of the wall cracks easily still need to adopt measures to local Settings to strengthen network.
5.the higher compressive strength, small shrinkage deformation and has certain elasticity micro expansion of anti-cracking mortar or polymer mortar.Due to the rock wool board texture is soft, so the thickness of anti-cracking mortar with 25 mm to 30 mm advisable.
6.the protective layer partition and seam sealing waterproof processing, in order to reduce the shrinkage and temperature stress.
Three, to solve the protection problem of weathering layer and the facing layer.
Good protective layer and act the role of weathering on the surface can use two methods:
7.in the protective layer tile is stuck outside, but this method increased the wall body weight and cost, as there is a requirement for high decoration construction is feasible.
8.outside the protective coating of high elasticity, good weather resistance exterior wall coating, because the coating has good elastic-plastic and waterproof function, and has good anti-cracking and weather resistance, so the impact on the protective layer and insulation layer is a protective effect.