Plasters and Mortars

Further applications concerning foaming of masses, based on different cementitious materials, with aluminium powders and pastes include adjusting the effect of expansion in insulation plasters and restoration plasters and for shrinkage compensation in mortars, screeds and sealing compounds.

Insulation plasters and restoration plasters, mortar and sealing compounds can be made porous based on the same principle as for autoclaved aerated concrete. On one hand, adding aluminium improves processing qualities, and on the other, the pore formation compensates for the shrinkage that occurs during the hardening process.

Usually mixtures of aluminium powders and calcium carbonate powders are used to avoid the risk of explosion when dealing with aluminium powders when processing dry mixtures.

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Aluminium flakes

These coarse, lamellar particles are produced by grinding or stamping aluminium foils.

In addition to pyrotechnics (to produce certain effects), application areas are primarily found in the chemical industry.

Acetone extract [%] Active metal content [%] Bulk density [g/cm³] Particle size [µm] Application
0/150 max. 0,6 min.92 approx. 0,40 0 - 150
0/300 max. 0,6 min.92 approx. 0,40 0 - 300
150/300 max. 0,6 min.92 approx. 0,40 150 - 300
0/600 max. 0,6 min.92 approx. 0,40 0 - 600
300/600 max. 0,5 min.92 approx. 0,40 300 - 600

Calcium carbonate mixtures

For applications that require a medium for generating porosity in plasters and mortars, mixtures of aerated concrete aluminium powders and calcium carbonate are recommended to inhibit the ability of the powder mixture to ignite.

AL-content [%] D 50 value [µm] Sieve residue 45µm [%] Application
CaCO3/4307/10 10 ca. 35 max. 25
CaCO3/4307/20 20 approx. 35 max. 25
CaCO3/4402/10 10 ca. 45 max. 35
CaCO3/4402/20 20 ca. 45 max. 35
CaCO3/7004/10 10 ca. 85 max. 72
CaCO3/7004/20 20 ca. 85 max. 72
CaCO3/8010/10 10 ca. 30 max. 15
CaCO3/8010/20 20 ca. 30 max. 15
CaCO3/8610/10 10 ca. 30 max. 15
CaCO3/8610/20 20 ca. 30 max. 15
CaCO3/UP30/10 10 ca. 70 max. 70
CaCO3/UP30/20 20 ca. 70 max. 70

Aerated concrete aluminium powders

Produced from aluminium grit using wet or dry grinding in a ball mill.

By varying the production process, particle size distribution and, if required, post-treatment of the aluminium particles, performance properties such as reaction start time, reaction speed, the resulting pore structure and casting stability are adapted to meet the requirements for the building material (bulk density, strength, etc.). Effective quality controls and an international technical application service are the foundation of Schlenk`s position as a market and technology leader.

Bulk density [g/cm³] D 50 value [µm] Recommended bulk density [kg/m³] Sieve residue 45µm [%] Application
7002 0,18 - 0,29 approx. 150 > 600 max. 90
7004 0,20 - 0,29 approx. 85 > 600 max. 72
7304 0,24 - 0,29 approx. 85 > 600 max. 72
7008 0,15 - 0,19 approx. 65 500 - 600 max. 46
7009 0,15 - 0,19 approx. 50 500 - 600 max. 32
7110 0,12 - 0,15 approx. 40 400 - 500 max. 20
7310 0,12 - 0,15 approx. 40 400 - 500 max. 20
7112 0,11 - 0,15 ca. 35 400 - 500 max. 12
7114 0,10 - 0,15 approx. 30 300 - 450 max. 10
4102 0,11 - 0,16 approx. 45 500 - 600 max. 35
4402 0,11 - 0,16 approx. 45 500 - 600 max. 35
4307 0,13 - 0,15 ca. 35 450 - 550 max. 25
8010 0,12 - 0,14 approx. 30 350 - 450 max. 15
8610 0,12 - 0,14 approx. 30 350 - 450 max. 15
8013 0,09 - 0,14 approx. 25 300 - 450 max. 5
8014 0,09 - 0,14 approx. 22 < 400 max. 2
77004 0,14 - 0,19 50 - 70 > 500 max. 70
77007 0,13 - 0,18 45 - 70 > 500 max. 60
77010 0,11 - 0,15 22 - 30 400 - 500 max. 20
77012 0,11 - 0,15 22 - 27 400 - 500 max. 8
77212 0,11 - 0,15 20 - 25 400 - 500 max. 8
77013 0,11 - 0,15 20 - 25 400 - 500 max.4
77113 0,11 - 0,15 20 - 25 400 - 500 max. 4
77014 0,11 - 0,15 18 - 25 300 - 450 max. 2
75107 0,20 - 0,28 40 - 65 > 500 max. 60
75110 0,18 - 0,26 25 - 32 400 - 500 max. 20
75210 0,18 - 0,26 25 - 32 400 - 500 max. 20
75112 0,15 - 0,22 20 - 25 400 - 500 max. 10
75113 0,15 - 0,22 20 - 25 350 - 450 max. 4
76007 - 40 - 65 > 500 max. 60
76010 - 22 - 30 400 - 500 max. 20
76012 - 20 - 28 400 - 500 max. 10
76013 - 17 - 25 350 - 450 max. 4

If you would like further information we would be happy to assist you.

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