Polystyrene board interior insulation external wall construction technology

At present, most of the brick-concrete buildings in northern China use polystyrene boards to insulate the outer walls. As far as the Beijing area is concerned, thermal insulation with this method is better, but it is more difficult in construction. At the same time, due to improper operation, there is often a phenomenon that the entire wall surface is poor in smoothness, and cracks occur at the intersections of the internal and external corners of the board seams. In view of this situation, we use a more reasonable construction method for your reference.
First, the construction conditions 1. The wall surface of the polystyrene board to be pasted should first be cleaned so that there will be no dust, floating dust or loose particles on the wall.
2. Check the wall surface so that its flatness and verticality meet the specifications.
3. The wall can not be moist or dry on the sensory surface, but it can be moistened slightly.
4. Polystyrene board should meet the quality requirements, accurate size, specifications, no dust and dirt on the board.
5. Tools are available and materials are complete. The main auxiliary materials are: quick-curing adhesives VP and BP; slow-hardening adhesives Ao and Be.
Second, the construction process 1. Stick a polystyrene plate. In the area where the polystyrene plate is to be scratched, the blade is brushed with a knife or a wire brush, and then the uniform quick-hardening adhesive is scooped onto the polystyrene plate with a spoon, and a bonding point with a diameter of 100 mm and a thickness of 3 is wiped out. They are plum-shaped and spaced at a distance of 300mm from point to point. Wipe the four corners and the center of the polystyrene board with a slow-hardening adhesive. After the adhesive has been wiped, the two persons lift up and stick to each other on the wall. In order to ensure that the flatness of the wall surface satisfies the requirements, spacers can be leveled in the air layer. Immediately afterwards, inspections were made using a ruler board and a wire drop. Those that did not meet the specifications should be adjusted in time.
2. The use of adhesives. The adhesive strength of the fast-hardening adhesive-bonded polystyrene sheet grows rapidly, enabling the polystyrene sheet to bond quickly and securely. However, this kind of adhesive has a certain brittleness. In the course of use, if there is a large deformation on the plate surface or a relatively severe vibration or impact is encountered, there is a possibility that the polystyrene plate and the wall surface may be separated at individual parts. Therefore, in the evenly distributed bonding points, the quick-hardening adhesive should be used at four-fifths of the points and the slow-hardening adhesive should be used at one-fifth of the points. Fast and hard adhesive should be used with the mix. Each batch must be used within 40min. In this way, the polystyrene board can be adhered as early as possible to improve the early bond strength and have a good long-term bond strength.
3. Plate seam processing. In the construction of polystyrene slabs, the most common problem is that after surface plastering, there are cracks in the board seams and at the corners and at the corners. For this purpose, a KF80 caulking putty was used at the joint between the polystyrene plates, and a layer of glass ribbon was placed at the caulking place, pressed flat with a gray knife, and the glass ribbon was pressed into the putty, when the surface was wiped, After the first layer of putty is flattened, apply a layer of glass ribbon, and then do the second layer.
Using the above methods, it is both reliable and safe, satisfies the construction quality of the polystyrene board, and has played an economic and applicable effect. Suspended architecture is one of the modern new structure and the new construction method. The common practice is to tighten the super-strong net on the empty pillars inside. The architect hangs everything he thinks necessary anywhere on the Internet. In any form of this type of construction, most of them are symmetrical, so that the center of gravity falls on the center pillar. The pillars are under pressure, and the skeleton of the building is under tension. This kind of building has many advantages that do not need to be fully based on the foundation and the floor construction can also be carried out on the ground, so it develops quickly. In 1972, B. was built in Munich, formerly West Germany. M. The W company building is a well-known hanging structure.
The building consists of three parts, belonging to the office building with a height of 22 floors. The plane of this part is arranged like four petals symmetrically at the four corners of the central elevator shaft. Each floor area of ​​1600m2, height 3.82m, net height 2.9m. This architectural design is a winning design for a limited design competition. The suspended structure is determined by the specific building conditions - the petal-shaped plane, the middle device layer making the outer wall discontinuous, and the building volume comparison requiring the upper and lower layers to be separated from each other. There are no foundations for the four cylinder office buildings, and the foundation is concentrated under the high towers of the central elevator. The full load of the four petal shaped office units is supported by four prestressed reinforced concrete booms. The boom is suspended from the central elevator and is lifted out of the support, and adopts a layered construction method that adapts to this type of structure. That is, the central elevator and the tower are built first, and four strong ones are extended on the top of the tower. Beam racks, and then hang the ropes used to hang the house at the end of the beam, straight down to the ground. The construction worker first builds the highest floor on the ground. After he builds it, he lifts the floor up and hangs it up, then builds the next floor on the ground. This is done one by one and the steel cables are collected layer by layer, and most builders are always working on the ground.
The entire B. M. The W company building has achieved good results both technically and economically.