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Aluminium powders and pastes
Aerated concrete, a vapour-hardened building material with high porosity, is produced by using a small amount of aluminium powder or paste as reaction additive. The aluminium serves as an expansion agent.
The raw material mixture for manufacturing aerated concrete, a low viscosity mortar of ground sand, unhydrated lime, cement and water, contains homogenous distributed tiny aluminium particles which cause a gas formation in the mixture. As a result, the hydrogen gas in the form of numerous small bubbles turns the mixture into a highly porous foam.
For the different bulk density of aerated concrete products appropriate adjusted aluminium powders and pastes are used. Mainly they are characterized by a different particle size distribution.
EXPANDIT® BE
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Aluminium powders: |
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Product |
active. |
D50 [µm] |
Sieve residue |
Application |
| EXPANDIT® BE 1080 | min. 95 |
ca. 55 |
65 ± 5 |
medium densities |
| EXPANDIT® BE 1080 AR | min. 95 |
ca. 55 |
65 ± 5 |
medium densities |
EXPANDIT® BE 1100 |
min. 95 |
ca. 50 |
55 ± 5 |
medium and low densities |
EXPANDIT® BE 1100 AR |
min. 95 |
ca. 50 |
55 ± 5 |
medium and low densities |
EXPANDIT® BE 1140 |
min. 95 |
ca. 42 |
25 ± 5 |
medium and low densities |
EXPANDIT® BE 1140 AR |
min. 95 |
ca. 42 |
25 ± 5 |
medium and low densities |
EXPANDIT® BE 1160 |
min. 95 |
ca. 38 |
20 ± 5 |
low densities |
EXPANDIT® BE 1160 AR |
min. 95 |
ca. 38 |
20 ± 5 |
low densities |
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Aluminium pastes: |
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Product |
Solvent |
Solids |
D50 [µm] |
Sieve residue |
Application |
| EXPANDIT® BE 1081/SC | DE-Glycol |
70/75/80 |
ca. 55 |
65 ± 5 |
medium densities |
EXPANDIT® BE 1101/SC |
DE-Glycol |
70/75/80 |
ca. 50 |
55 ± 5 |
medium and low densities |
EXPANDIT® BE 1140/SC |
DE-Glycol |
70/75/80 |
ca. 42 |
25 ± 5 |
medium and low densities |
EXPANDIT® BE 1160/SC |
DE-Glycol |
70/75 |
ca. 38 |
20 ± 5 |
low densities |
For all pastes: active metal content is at least 95M.-%