Nowadays, China is vigorously promoting prefabricated buildings, which have ushered in great development opportunities. As a new type of wall material, autoclaved aerated concrete slabs are becoming increasingly popular due to their advantages. However, what are the characteristics or advantages of autoclaved aerated concrete slabs that are so popular among people?

Application of autoclaved reinforced concrete slabs

The common lightweight blocks and boards in the current market include aerated concrete blocks and boards, lightweight concrete blocks and boards, fly ash wall materials, etc. They have their own advantages and characteristics, and are highly trusted and promoted by users

1、 What is autoclaved aerated concrete slab

Autoclaved aerated concrete slab (ALC slab) is a lightweight, porous, and environmentally friendly building material that is mainly made of cement, lime, silica sand, and other raw materials, and is configured with different quantities of anti-corrosion treated steel mesh according to structural requirements. Through high temperature and high pressure, steam curing, and reaction production, autoclaved aerated concrete slabs with porous crystals are produced. Their density is lower than that of general cementitious materials, and they have good fire resistance, fire resistance, sound insulation, thermal insulation, and thermal insulation properties.

2、 Characteristics and advantages of autoclaved aerated concrete slabs

1. Lightweight: With a specific gravity of only 500-650kg/m3, which is only 1/4 of concrete and 1/3 of clay bricks, it is known as concrete that floats on the water surface. The design value is 650kg/m3.

2. Fireproof: A 100mm thick board can last for 3.82 hours, and a 125mm thick board can last for more than 4 hours, making it a first-class fireproof material.

3. Thermal insulation: The thermal conductivity coefficient is 0.114, and the insulation effect of its 125mm thick material can reach that of a regular 370mm thick brick wall. It is a new type of building material that can achieve building energy efficiency of over 65% with a single material.

4. Sound insulation: The sound insulation index of 100mm thick board (double-sided putty) reaches 40.8dB (transmission loss); The sound insulation index of 120mm thick board (double-sided putty) reaches 45dB (transmission loss); The sound insulation index of 150mm thick board (double-sided putty) is 48dB (transmission loss); There are many small pores inside the ALC board, which has dual sound insulation and absorption properties.

5. Seismic resistance: It can adapt to large inter story angle displacement, allowing for an inter story displacement angle of 1/150. When using special joints, it can reach 1/120, and under all joint conditions, there will be no board detachment when the inter story displacement angle is 1/20.

6. Environmental friendliness: No radiation, with an hourly exposure of 12&gamma& mu;/h， Equivalent to the level of outdoor grass; ALC is a new type of environmentally friendly building material that can also save energy consumption during use, and belongs to the national tax-free building material category.

7. Load bearing capacity: The interior of the board is equipped with double-layer and bidirectional steel mesh sheets, providing external wall panels, partition panels, roof panels, floor slabs, decorative panels, etc.

8. Crack resistance: ALC boards are reinforced with rust resistant steel bars and cured under high temperature, high pressure, and steam. They have a small shrinkage ratio in inorganic materials and are filled with specialized polymer adhesives to effectively prevent cracking.

9. Convenience: ALC boards are measured on-site and processed to a fixed length. They are factory prefabricated products with high precision and can be planed, sawed, and drilled. Adopting dry operation, installation is simple, and the process is simple. It eliminates the construction columns, waist beams, and plastering of traditional walls, and directly applies putty, greatly shortening the construction period, improving efficiency and construction quality.

10. Economy: Using ALC as a wall material can effectively increase the usable area of buildings, reduce energy consumption, and meet national building energy efficiency standards. Under the same requirements for sound insulation and fire prevention, ALC boards have a small thickness and do not require auxiliary components such as columns, ring beams, and waist beams. This can reduce wall loads and thus reduce building costs.

11. Creativity: ALC board can be made into artistic patterned board, and the material can directly achieve effects such as brick pattern, grid pattern, horizontal pattern, imitation brick, imitation stone, etc. after installation.

12. Widely applicable: It can be used for the interior and exterior walls, floor slabs, roof panels, firewalls, explosion-proof walls, steel structure beams and columns fire protection maintenance, soundproof walls, and retrofitting of old buildings in office buildings and factories with concrete structures, steel structure residences, frame structures, and frame shear structures.

13. Diversity: There are also 50mm thin plates and 30mm ultra-thin plates (which can be used as exterior wall insulation boards and fireproof boards).

14. Shortcut: Eliminating the traditional masonry process of mixing, masonry, plastering, reinforcing steel, formwork, concrete and other trades, all work can be completed by panel installers alone, avoiding conflicts and mutual constraints between trades.

15. Specificity: ALC board has a width of 600mm and a length of up to 6 meters (150mm thick), while other boards cannot reach a length of 6 meters.

3、 Application scope of autoclaved aerated concrete slab

1. Old building renovation project. Energy saving renovation of existing buildings is a planned national undertaking that will be carried out for a long time. In such projects, using lightweight exterior wall panels is a wise choice. Compared with other exterior wall materials, lightweight thermal insulation wallboard is simple and fast to install, with short construction period, low cost, less interference to the normal work and life of residents during construction, and has the advantages of waterproof and anti-aging, so it is more and more popular in such projects.

2. The interior and exterior walls of public buildings such as office buildings, hospitals, school classrooms, office buildings, shopping malls, supermarkets, hotels, and guest rooms, as well as the infill walls of residential and apartment buildings (including bathrooms, kitchens, partition walls, partition walls, and exterior walls). The common characteristics of this type of building are multiple compartments, a relatively simple and unified internal layout, and often the need to adjust the internal structure according to customer needs. Therefore, lightweight partition boards are more suitable for use.

3. Interior decoration. At present, the main material used for room partitions is light steel keel gypsum board. Compared to lightweight wall panels, this material has low strength, poor sound insulation effect, poor durability, and no significant price advantage. Therefore, many users now turn to using lightweight wall panels as room partitions.

4. Due to the lightweight nature of this material, it is specifically used as the main wall building material for steel structure buildings (factories/public buildings/residential buildings, etc.) that have developed maturely abroad

Aerated concrete slabs are mainly made of siliceous and calcareous materials, with aluminum powder as the gas generating material, and reinforced with anti-corrosion treated steel mesh. They are made of porous slabs through water mixing, pouring, pre curing, cutting, and steam curing. From the initial processing of raw materials to the final product being discharged from the kettle, the Zhengyi aerated concrete slab production line solution will effectively meet the processing needs of various customers for aerated concrete slabs.

The production line for aerated concrete slabs is an improved version of the production process for aerated concrete blocks. Compared with other lightweight boards, aerated concrete boards have significant advantages in board performance, product stability, raw material sources, and production scale. Aerated panels can be divided into partition panels, exterior wall panels, roof panels (floor slabs), fireproof panels, etc. according to their applications. They are widely used in industrial and civil buildings such as concrete structures and steel structures.

Henan Zhengyi Machinery has many years of experience in the production and design of aerated concrete building materials. Choosing Zhengyi Machinery not only provides you with high-quality equipment, but also expert tailored project planning. Equipment installation, debugging, technical training, including every small detail of your production and maintenance, Zhengyi Machinery is always at your service.