Aerated Concrete Grade
AAC-grade aluminum paste, fast/standard/delayed gas curves certified per lot, 65-72% solids, water-based options. 0.4-0.6 kg/m³ dosing, custom reactivity tuning.
QUICK ANSWER
AAC aluminum paste is flake aluminum powder dispersed in a carrier (water or solvent with protective agents) used as the gas-forming agent in autoclaved aerated concrete — the lightweight building blocks and panels whose millions of uniform pores come from aluminum reacting with lime to release hydrogen. It is the highest-volume aluminum powder product in the world, consumed by every AAC plant on earth.
The chemistry is simple but the specification is exacting: aluminum flake reacts Ca(OH)₂ + Al → calcium aluminate + H₂, and the gas release must peak while the slurry is still plastic but peak neither too early (gas escapes) nor too late (cracking). Reactivity is controlled by flake size, thickness, oxide skin, and surface treatment — which is why AAC plants buy paste on gas-evolution curves, not just chemistry. Paste form (65-72% solids) eliminates dust explosion risk and doses cleanly into the mixing line. A standard AAC plant consumes 0.4-0.6 kg of aluminum per cubic meter of blocks — modest per unit, enormous in aggregate.
MATERIAL DATA
Lot-level controls focus on the chemistry, particle characteristics, and process values that influence manufacturing consistency and finished-part performance.
| Element | Content | Performance Role |
|---|---|---|
| Active aluminum | 85-92% of dry flake | Gas-forming value — drives hydrogen release |
| Flake particle size (D50) | 15-40 µm grade dependent | Controls reaction timing and pore structure |
| Solids content | 65-72 wt% (paste) | Dosing consistency and safe handling |
| Carrier | Water or DEHP-free solvent systems | Dust-free handling; water-based for green plants |
| Covering agent | Fatty acid protected | Delays reaction start for process window |
Final limits can be aligned with the agreed purchase specification.
APPLICATIONS
Autoclaved aerated concrete production is the entire market — and it is a giant: AAC is the standard wall material across China, Europe, the Middle East, and growing markets in India and Southeast Asia, with global production in the hundreds of millions of cubic meters annually. Every plant runs aluminum paste or powder dosing on every mix, buying on reaction-curve consistency because a drifting lot shows up immediately as off-spec block density or cracking. Plants qualify a paste supplier and stay for years — the switching cost is a production line full of scrapped blocks.
Adjacent demand comes from calcium silicate boards, lightweight refractory castables, and cellular concrete variants that use the same gas-forming chemistry. Green-building momentum favors AAC (thermal insulation, fire resistance, low embodied energy), and water-based paste grades have displaced solvent systems as environmental standards tighten — the direction our product range already reflects.
NON-FERROUS BASE METAL POWDERS
CUSTOM SUPPLY
We supply AAC aluminum paste in fast, standard, and delayed reaction grades, water-based and solvent-based, each certified with gas-evolution curves (onset time, peak, total volume at standard conditions). Custom reactivity tuning for your lime quality and process temperature, dosing-equipment compatibility, and trial lots against your mix design are standard. Not export-controlled; paste form ships as non-DG.
We supply AAC aluminum paste in fast, standard, and delayed reaction grades, water-based and solvent-based, each certified with gas-evolution curves (onset time, peak, total volume at standard conditions).
Custom reactivity tuning for your lime quality and process temperature, dosing-equipment compatibility, and trial lots against your mix design are standard.
MATERIAL COMPARISON
| Comparison Point | This Product | Dry Aluminum Powder |
|---|---|---|
| Dust explosion risk | Eliminated — wet paste | Present — needs ATEX handling |
| Dosing accuracy | High — pumps/scale | Good but dust loss |
| Reaction start | Delayed by carrier — forgiving | Immediate — tighter window |
| Storage safety | Simple | DG storage rules |
| Price per active Al | Slightly higher | Lower |
| Plant preference | Modern standard | Legacy plants |
TECHNICAL FAQ
Need a different chemistry, particle range, or processing route? Our material team can review the requirement and supply window.
Send your lime reactivity, mix temperature, and target density — we recommend fast/standard/delayed grade and tune if needed. The gas curve must peak while the cake is plastic; we certify the curve per lot.
0.4-0.6 kg per m³ for 500-600 kg/m³ blocks is typical; higher for lower densities. Active aluminum content drives it — our lots certify active content so your dosing stays stable.
AAC density is set by gas volume per batch. A 2% reactivity drift between lots shifts block density outside tolerance — visible as scrap within hours. Our lots are blended and certified to tight gas-curve windows.
Yes with modern covering agents — our water-based grades match solvent curves and now outsell them as plants upgrade environmental compliance.
No — and in paste form it ships as non-dangerous goods, simplifying logistics considerably versus dry aluminum powder.
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REQUEST THIS GRADE
Share your target chemistry, particle size, process, annual volume, and destination. Our powder specialists will confirm the closest production grade and documentation package.
