by The Chinese name of ALC board or AAC board (or NALC) is autoclaved lightweight aerated concrete, which is divided into ALC board (or NALC board) and AAC block (or NALC block, sand aerated concrete block).
It is a porous concrete board made of silica sand, cement, lime and other main raw materials, reinforced by rust-proof reinforcement, and cured by high temperature, high pressure and steam.
It is a new building material with excellent performance.
So there is no difference between the three kinds of plates, just the different names of plates.
The plate can be divided into ALC partition plate, ALC outer wall plate, ALC roof plate and ALC floor plate according to the purpose.
The reinforcement of each plate is determined according to the design load, material thickness, length, etc.
Generally, the thickness provided ranges from 75mm to 300mm, with 25mm interval.
The main properties of ALC board are as follows: 1.
Light weight: the specific gravity is only 0.5, and the structural calculation is 0.652.
Fire protection: 100 mm board can reach 3.23 hours, and 150 mm board can reach more than 4 hours.
3.
Thermal insulation: thermal conductivity is 0.114, and the thermal insulation effect of 125 mm thick material can reach ordinary 370 mm brick wall.
It is a material that can achieve more than 50% of building energy saving with a single material 4 Sound insulation: the sound insulation index of 100mm material reaches 44dB (transmission loss) 5.
Seismic resistance: it can adapt to large interlayer angle displacement, and the allowable interlayer displacement angle is 1/150, and it can reach 1/120 when special joints are used.
In all cases of joints, when the interlayer displacement angle is 1/20, the plate will not fall off.
6.
No radiation: its hourly exposure is 12 γμ/ h.
It is equivalent to the level on the outdoor lawn.
7.
Bearing capacity: its plates are equipped with steel mesh inside, providing external wall panels, partition panels, roof panels, floor slabs, decorative panels, etc.
8.
Construction convenience: the materials are factory prefabricated products, with high accuracy, planeable, sawable, and on-site fabricated plates.
Dry operation, simple installation, simple process, greatly shorten the construction period, improve efficiency and construction quality.
9.
Economy: NALC is used as the wall material, It can effectively increase the use area of the building and reduce the foundation cost.
Without increasing the comprehensive cost of the building, it can greatly improve the comfort of the building, reduce the energy consumption, and meet the national building energy conservation standard Roof panel, firewall, blast wall, fire protection maintenance of steel structure beams and columns, soundproof wall, storey adding and reconstruction of old buildings, etc.
In addition, Grade 04 damping block, 50mm thin plate and 37mm ultra-thin plate (which can be used as external wall insulation board) ALC plate is the abbreviation of autoclaved aerated lightweight concrete, which is a high-performance plate produced from fly ash or silica sand or industrial tailings or mineral sand (four materials can be used as main materials), water mud, lime aluminum powder and other main raw materials.
ALC plate is the international abbreviation of this material.
NALC board is a company in Nanjing that prepared the national standard node atlas at its own expense to publicize its own ALC board products in order to publicize its own materials.
It specially added the capital first letter N of the south of Nanjing to the ALC board as the name of the atlas.
Its sales personnel misled customers with the selling point that NALC board is different from other ALC boards in product promotion.
In fact, it is also called ALC board in the atlas published by the enterprise in Jiangsu Province; This is a joke in the industry.
AAC slab is also a new name prepared by some domestic autoclaved aerated concrete slab manufacturers.
No matter how the name is changed, ALC plate, NALC plate or AAC plate is the abbreviation of autoclaved aerated concrete plate.
Our national product standard is GB15762-2008.
Any domestic manufacturer must comply with this product technical standard.
Whether the main material is fly ash, silica sand, industrial tailings or mineral sand, its chemical composition is calcium silicate, but it exists in different forms in nature.
Source: steel structure design.
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