Product Advantages:
Lightweight
Autoclaved aerated concrete blocks typically weigh between 500-700 kg/cubic meter, which is only 1/4-1/3 the weight of clay bricks and fly ash bricks, and 1/5 the weight of normal concrete. They are one of the lighter types of concrete and are suitable for filling walls in high-rise buildings and load-bearing walls in low-rise buildings. Utilizing this material can reduce the overall weight of the structure by over 40% compared to traditional brick-and-concrete buildings. Due to the reduced weight, the buildings are less susceptible to earthquake damage, significantly enhancing their seismic resistance.
Insulation and Heat Retention
The thermal conductivity of aerated concrete typically ranges from 0.11 to 0.18 kcal/m·h·°C, which is only 1/4 to 1/5 that of granular earth bricks and fly ash bricks (the thermal conductivity of granular earth bricks is 0.4 to 0.58 kcal/m·h·°C; for fly ash bricks, it is 0.528 kcal/m·h·°C), and about 1/6 that of normal concrete. Practical evidence shows that a 20cm thick wall made of aerated concrete provides insulation equivalent to a 49cm thick mud brick wall, and its heat insulation performance is significantly better than that of a 24cm brick wall. This greatly reduces the thickness of the walls, thereby expanding the effective usable area of the buildings, saving on building materials, improving construction efficiency, reducing construction costs, and lightening the building's weight.
High Strength
Through experimentation, the compressed aerated concrete blocks have demonstrated compressive strength exceeding 25 kg/sq. cm, which is equivalent to the compressive strength of No. 125 clay bricks and sand-lime bricks.
4. Seismic resistance
In the 7.8-magnitude earthquake that struck Fengnan in Tangshan, post-earthquake inspections revealed that aerated concrete buildings only showed a few cracks, while brick-concrete structures collapsed almost entirely. This stark contrast between the two buildings, which are structurally similar but made of different materials, highlights the effectiveness of aerated concrete. Analysis suggests that this is due to the light weight and overall performance of aerated concrete, which results in less inertia force during an earthquake, thus providing certain seismic resistance. This will be highly beneficial for our earthquake-prone region.
5. Processed Goods
Autoclaved aerated concrete boasts excellent workability. It can be cut, planed, nailed, milled, and drilled. Additionally, steel reinforcement can be added during the manufacturing process, offering great convenience and flexibility in construction.
6. High Temperature Resistance
Autoclaved aerated concrete experiences a slight increase in compressive strength below 600°C, reaching nearly the same compressive strength as at room temperature around 600°C. Therefore, as a construction material, its fire resistance meets the national first-grade fire safety standard.
7. Acoustic Insulation
The aerated concrete's porous structure, resembling a sponge-like bread, is uniformly distributed with a large number of sealed air cells, thereby granting it sound-absorbing properties not typically found in conventional building materials.
8. Mechanization
In the current scenario, prefabricated aerated concrete panels can save storage space for finished products; reduce labor costs for masonry; minimize wet work; accelerate on-site construction progress; and enhance construction efficiency.
9. Adaptability
Customized solutions can be tailored based on local raw materials and conditions. Raw materials can include river sand, fly ash, ore sand, and more, adapting to local availability. Waste utilization is also possible, promoting environmental benefits and truly transforming waste into treasure. The strength of the aerated concrete blocks produced by the aerated concrete equipment is measured relative to a certain moisture content, known as the reference moisture content. The range of reference moisture content for strength varies by country; for instance, the standards in Germany, the European Community, and the UK require a reference moisture content of (6±2)%, based on the assumption that the product will have a moisture content of 2%-8% after installation on the wall. In Sweden and other countries, the reference moisture content is based on the air-dry state of the aerated concrete block, which is (10±2)%. In China, when evaluating the compressive strength grade, the GB/T11969—2008 "Autoclaved Aerated Concrete Performance Test Method" - "Compression Test Requirements" specifies a moisture content of 8~12%. The GB/T11971-1997 "Aerated Concrete Performance Test Method" stipulated that the test for compressive strength should be conducted under a moisture content of 25%-45% of the quality moisture content, which significantly differs from the actual moisture condition in walls and thus affects the quality assessment of the compressive strength of aerated concrete, and has been abolished.
