To understand the dosage of plastering mortar when laying steel wire mesh in external wall insulation construction, we must first know the influencing factors of plastering mortar dosage of galvanized steel wire mesh system for external wall insulation:
1, different insulation materials, such as the difference between insulation board and insulation mortar.
2. The flatness of the insulation layer needs to be leveled with mortar. For example, in T-type system, the dosage of anti-crack mortar in plate system and inorganic thermal insulation system is lower than that in particle thermal insulation system, because the flatness of the former is much higher than that of the latter.
3. Surface roughness of insulating layer. For example, in the construction of insulating layer surface with rubber powder polystyrene particles, cement slurry should be put forward as far as possible to reduce the cracks on the surface of insulating layer, otherwise this part will be filled with plastering mortar.
4. The choice of galvanized steel wire mesh is the main reason that affects the dosage of plastering mortar. The standard requirement is 0.9mm galvanized steel wire mesh, the thickness should be controlled at about 8mm, and the dosage of mortar is about 12kg.
5, steel wire mesh laying, should be as flat as possible, jump, reduce warping. The choice of this layer of steel mesh is very important. Besides the diameter of steel wire, we should also pay attention to the carbon content of steel wire. Usually, low-carbon steel wire is soft, so it needs to be laid. In addition, there is the construction of yin-yang corner joints in steel mesh construction, and the flatness of this joint is very important.
6. After the plastering construction is completed, the steel wire mesh can be exposed or not, and the grain of the steel wire mesh is faintly visible, so it is not necessary to look at the steel wire mesh (because there is a layer of brick bonding mortar outside, the acceptance standard can refer to the Shanghai external wall insulation acceptance rules).
7, construction personnel's technology, workers' skills and sense of responsibility are also crucial.
The above points are the factors that affect the dosage of mortar in the construction of external wall insulation and wall plastering. Only by paying attention to the above problems in construction can we ensure the quality of the whole insulation system and control the cost reasonably.