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Autoclaved Aerated Concrete Material
The AAC materials mainly include sand, fly ash, lime, aluminum powder, aluminum paste, etc.
Sand
Sand is mainly used for providing SiO2 in AAC production line.
| Contents | Superior Quality Product | First Class Product | Quality Product | |
| SiO2 | ≥ | 85.0% | 75% | 65% |
| K2O+Na2O | ≤ | 1.5% | 3.0% | 5.0% |
| Mica | ≤ | 0.5% | 0.5% | 1.0% |
| SO3 | ≤ | 1.0% | 1.0% | 2.0% |
| Silt | ≤ | 3.0% | 5.0% | 8.0% |
Fly Ash
Fly ash is mainly used for providing SiO2 in AAC production line. The Al2O3 contained also plays a great role.
| Contents | I Class | II Class | |
| Fineness (filtered by 0.045mm square hole sieve) | ≤ | 30% | 45% |
| Fineness (filtered by 0.080mm square hole sieve) | ≤ | 15% | 25% |
| Ignition Loss | ≤ | 5.0% | 10.0% |
| SiO2 | ≥ | 45% | 40% |
| SO2 | ≤ | 1.0% | 2.0% |
Lime
Lime is mainly used to provide CaO for reacting with SiO2, Al2O3 in siliceous materials under water heating condition to produce calcium silicate hydrate in AAC production line, leading to high strength finished products.
Besides, lime can also provide the aluminum the condition for gas generation.
Parameters| Contents | Superior Quality Product | First Class Product | Quality Product | |
| A(CaO+MgO) % | ≥ | 90 | 75 | 65 |
| MgO % | ≤ | 2 | 5 | 8 |
| SiO2 % | ≤ | 2 | 5 | 8 |
| CO2 % | ≤ | 2 | 5 | 7 |
| Reaction Speed (Min) | ≤ | 5～15 | 5～15 | 5～15 |
| Reaction Temperature (℃) | ≥ | 60～90 | 60～90 | 60～90 |
| Residue (%) | ≤ | 5 | 10 | 15 |
| Fineness (filtered by 0.080mm square hole sieve),% | ≤ | 10 | 15 | 20 |
Aluminum Powder/Aluminum Paste
Aluminum powder and aluminum paste is used for the chemical reaction in slurry in the AAC production line. The generated gas will form small and uniform air hole, enabling the AAC to be porous.
| Type | Model | Solid (%≥) | Active Aluminum in Solid%≥ | Fineness (filtered by 0.075mm square hole sieve) %≤ | Gas Evolution Rate % | Water Dispersibility | ||
| 4min | 16min | 30min | ||||||
| Oil Based Solvent Aluminum Paste | GLY-75 | 75 | 90 | 3 | 50-80 | ≥90 | ≥99 | No Granule |
| GLY-65 | 65 | |||||||
| Water Based Solvent Aluminum Paste | GLS-75 | 70 | 85 | 40-60 | ||||
| GLS-65 | 65 | |||||||
| Model | Particle Size Distribution | Porosity (g/cm³ ≤ ) | m2g ≥ | Chemical Ingredients | ||
| Particle Size (um ≥) | Mass Fraction (%≤) | Active Aluminum (≥) | Impurities /Grease (≤) | |||
| FLQ80B | 80 | 1.5 | 0.25 | __ | 90 | 3.5 |
| FLQ80D | 80 | 1.0 | __ | 0.42 | 85 | 2.8 |
| FLQ80E | 80 | 1.0 | __ | 0.60 | 85 | 2.8 |
| FLQ8OF | 80 | 0.5 | __ | 0.60 | 85 | 3 |
| FLQ63A | 63 | 0.3 | 0.25 | __ | 88 | 3.5 |
Cement
Cement is one type of widely used hydraulic binding materials. The common portland cement is suitable for producing AAC.
Common portland cement mainly includes CaO, SiO2, Al2O3, Fe2O3 and small amount of MgO and SO3. As the main calcium materials, cement can be used alone, but cement is more likely to be used with lime as the calcium material.