熱門關鍵詞：濟南彩鋼板 | 濟南復合板 | 濟南彩鋼瓦 | 濟南c型鋼 | 濟南鋼結構 |
Taking rock wool composite board as an example, the requirements for rock wool board as thermal insulation material: select flame-retardant board, the density is ≥ 140kg / m3, the thermal conductivity is ≤ 0.04w / m.k, the tensile strength perpendicular to the surface is ≥ 10KPA, the compressive strength is ≥ 40kpa, and the combustion function grade is Grade A.
Glass fiber mesh is preferred: the glass fiber mesh used in Yantai insulation board thin plastering external wall external insulation system is required to be alkali resistant because it is buried in cement mortar. According to the data, Yantai polystyrene board exterior wall insulation system can reach the service life of 40-50 years. If the alkali resistant glass fiber mesh cloth is used, it will be damaged and broken in advance in the alkaline environment of cement, which will greatly shorten the service life of the whole system. Therefore, it is necessary to choose alkali resistant glass fiber mesh cloth.
Selection of bonding mortar: due to the addition of cement on site, it is difficult to control the quality and proportion of cement in the construction process, which increases the complexity of the construction process. Construction of single component bonding mortar is simple. It can only be used by adding water and on-site mixing, so as to prevent the decline of bonding mortar quality due to improper addition of cement and other materials. Single component bonding mortar shall be selected as far as possible during construction.
Selection of anchors: after the selection of anchors, it is necessary to first carry out the sample construction and tensile test of anchors.
2. Materials shall be properly deposited
Make preparations before construction and warehouse management. In many construction sites, it is common for rock wool boards to accumulate in the open air after entering the site. The sun and rain of rock wool board are very easy to cause board structure deformation and shrinkage deformation.
3. The treatment of base course must be qualified
For external insulation works (especially the external insulation system with thin plastering layer), the scale error between plastering layer and finishing layer largely depends on the base course. Therefore, it is necessary to evaluate the scale error of the base before construction.
4. The on-site paste is prepared in proportion
Binder slurry plays an important role in the construction of external wall thermal insulation rock wool board. It is necessary to strictly follow the instructions and pay attention to timeliness.
5. The selection of data scale of rock wool composite board is necessary and the standard is reasonable
6. Glass fiber mesh with correct structure
The grid cloth shall be paved and pressed into the cementation layer, and the anti crack mortar on the surface shall fully scrape the grid cloth, but the thickness shall not be too thick. For the system with thin plastering layer, the thickness of the protective layer shall not be less than 3mm and not more than 6mm, subject to the hidden grid, so as to give full play to the stress caused by temperature. If the anti crack mortar is too thick, the grid cloth can not play a good role and simply cause surface cracks. Reinforcement mesh shall be added around door and window openings and internal and external corners, and a layer of reinforcement mesh shall be fully paved on the wall on the first floor.
7. It is recommended to use strip bonding method to paste rock wool board
The so-called strip bonding method is to spread the mortar on the whole plate, then spread it with a serrated trowel, and hang the excess mortar. This method can prevent hollowing and warping deformation of rock wool board, and can also prevent water seepage, ventilation and falling due to lax edge sealing. The mortar consumed by strip bonding method is almost the same as that consumed by point bonding method.
8. Problems needing attention to prevent surface mortar cracks
The surface shall be plastered with mortar twice, and the total thickness shall be controlled between 3mm and 6mm.
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