The minimum galvanizing amount and fire resistance time required for steel structure design are relatively high, and the unilateral price is relatively high. For multi- and high-rise residential steel structure systems, the selection of supporting, economical and energy-saving wall materials is very important. At present, the design and selection of exterior wall materials mainly include cement thermal insulation exterior wall panels, lightweight aerated concrete blocks, Jiangsu alc panels, etc.

1. Various physical parameters of Jiangsu alc sheet

Fire resistance, the fire resistance limit of 100 thick Jiangsu alc board can reach 3.23 hours, the fire resistance limit of the partition walls on both sides of the originally designed evacuation aisle is not less than 1.0 hours, and the fire resistance limit of room partition walls is not less than 0.75 hours, choose 150 thick Jiangsu The alc sheet can meet the original design requirements. Insulation, the original design is calculated according to the energy saving of the office building, and there is no insulation requirement for the inner partition wall. The thermal conductivity of Jiangsu alc sheet is 0.13, and it has good thermal insulation performance.

Sound insulation, the original design is according to the requirements of office buildings, and the sound insulation performance is 45dB. The sound insulation performance of 150 thick Jiangsu alc sheet is 45dB. Structural load requirements, the current self-weight of Jiangsu alc plate is 650kg/m3, the original 200-thick aerated concrete block is 750kg/m3, and the two sides of the aerated concrete block wall need to be plastered with cement mortar as the bottom layer. The alc sheet can be directly approved for putty, and the 150-thick Jiangsu alc sheet can meet the current structural calculation requirements after structural review. The toilet waterproof Jiangsu alc board is an aerated concrete product, which is similar to the original aerated concrete block.

2. Precautions for construction

When choosing Jiangsu alc board, pay attention to the flatness of the board and directly whiten it, and do not do mortar plastering in the later stage. Brush the face with acrylic emulsion and then paint. For the installation and reinforcement of the top plate of the door and window openings, refer to the requirements for different door opening widths in Atlas 03SG715-1. The specifications and dimensions of the reinforcement iron parts and the hanging bars should meet the relevant requirements in the Atlas, and anti-corrosion treatment must be carried out. The specification of Jiangsu alc sheet is 600mm wide, and 300 wide glass fiber mesh cloth is set at the seam. A 200-foot-high concrete counter-sill with the same wall width is set under the bathroom wall. In the later stage, the wall can withstand wall-mounted appliances and components such as range hoods and air conditioners.

Jiangsu alc sheet

What kind of installation plan is there?

Jiangsu alc sheet can be used as exterior wall, interior wall, roof, floor, thermal insulation, decoration, fence, frame, line angle, etc. Setting-out: Before setting-out, the dust on the ground of the construction site must be cleaned, and then the technicians shall set-out the corresponding positions on the ground and side walls according to the drawings provided by the partner (the deviation of the axis displacement shall not exceed 5mm). Arrange the number and size of wall panels, the corners of the walls and the special-shaped panels for door and window frames. The next process can only be carried out after the line has been inspected by the partner.

Clamp fixing: The connection between Jiangsu alc board and the main wall, ground, top surface, beam and column must be fixed with ∪ or L type clamps. When the alc board is connected to the ceiling and beam, the fixed position of the clip should be at the joint of the two boards; when the wall board is connected to the adjacent main wall or column, it should be in the contact between the adjacent main wall or column and the board. Two clips are fixed at each place, and all clips are fixed with a nail gun.

Vertical plate construction: The vertical plate should not only ensure the verticality and smoothness of the wall, but also ensure the stability of the wall. Therefore, the dust on each bonding surface must be cleaned before the vertical plate, and the interface treatment of each section shall be carried out. The adhesive material should be squeezed tightly when bonding, and at the same time, the wood block should be hit from the side with a rubber hammer, so that the bonding ash seam is full and dense, and the bonding is firm. Any wall that can reach the top with one board should be pryed up from the lower end of the Jiangsu alc board with a special crowbar. A gap of 20-30mm should be reserved between the lower end of the board and the ground. After the verticality and flatness are adjusted to pass, use wooden wedges to clamp to both sides, and then use C20 fine stone concrete to plug the gap at the bottom of the springboard. And plug its holes with C20 fine stone concrete.

What is the construction specification of Jiangsu alc sheet?

In fact, whether it is ALC board, AAC board or Jiangsu alc board is the abbreviation of autoclaved aerated concrete board, our country's product standard is GB15762-2008. Any domestic manufacturer must comply with this product technical standard. Regardless of whether the main material is fly ash, silica sand, industrial tailings or ore sand, its chemical composition is calcium calcium salt, but it exists in different forms in nature.

Jiangsu alc sheet is a non-combustible inorganic material with good fire resistance. As a wall panel, the fire resistance limit of 100 thick plate is 3.23 hours; 150 thick plate> 4 hours; The fire resistance limit of the thick plate to protect the steel column is more than 4 hours; all exceed the first-class fire resistance standard. Earthquake resistance/wind resistance: This can ensure that the building maintenance structure will not be damaged greatly under the action of strong wind or seismic force, and has strong earthquake resistance. In the 1:1 simulated earthquake test, after the seismic test with an intensity of 10.5 degrees (1.2g), none of the plates of the tested building model were broken, and none of the 120 Jiangsu alc plate installation nodes were damaged.

When choosing Jiangsu alc board, pay attention to the flatness of the board and directly whiten it, and do not do mortar plastering in the later stage. Brush the face with acrylic emulsion and then paint. For the installation and reinforcement of the top plate of the door and window openings, refer to the requirements for different door opening widths in Atlas 03SG715-1. The specifications and dimensions of the reinforcement iron parts and the hanging bars should meet the relevant requirements in the Atlas, and anti-corrosion treatment must be carried out. The specification of Jiangsu alc sheet is 600mm wide, and 300 wide glass fiber mesh cloth is set at the seam. A 200-foot-high concrete counter-sill with the same wall width is set under the bathroom wall. In the later stage, the wall can withstand wall-mounted appliances and components such as range hoods and air conditioners.

Jiangsu alc sheet

How to be used in steel structure houses?

At present, the production technology and production equipment of domestic Jiangsu alc sheet manufacturers are mainly from Japan and Germany, and the products can be widely used in various domestic and foreign construction projects as interior and exterior wall panels, roof panels, etc. First of all, let's introduce the usual Jiangsu alc sheet. It is mainly made of quartz sand or fly ash, cement, lime, etc., and is equipped with (or not) double-layer (or single-layer two-way cold-drawn steel mesh), which is cured by high-temperature steam curing. It is a mature building material with superior performance, easy installation and flexibility.

At present, the domestic Jiangsu alc board lacks experimental data support, and the thinnest floor application data is 100mm thick. The distance between the floor support system of the light frame system will not exceed 600mm, so the thin plate can be applied. The following is a scene showing the application of the thin plate abroad. In addition to the low-rise residential building, through the conversion of the light frame system, the supporting distance is reduced, and a large number of high-rise applications are also used. under construction.

The construction site stacking site of Jiangsu alc panels should be close to the installation site, and the terrain should be solid, flat and dry, and the panels should not directly touch the ground. The lower part should be aerated blocks or wooden support pads, and the height of each layer should be ≤1m, and the total height ≤2m, the length of the cantilever is 1/5L~1/6L of the board length, and covering measures should be taken in the rainy season.

The handling, loading and unloading and hoisting of Jiangsu alc plates use special equipment such as nylon belts, trolleys, tower cranes, etc., and good binding measures should be taken during transportation. Jiangsu alc plates are directly transported from the factory to the construction site, and the transfer should be reduced after entering the site. Jiangsu alc plate wall is composed of 600-wide C-type (complex reinforcement) plate, joint reinforcement, reinforced concrete outer frame with 150-250 width × plate thickness at the door opening, and a small reinforced concrete structural column is added at the free end of the plate. whole wall.