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Mullite low-cement concretes - BM

Symbol Granularity
[mm]
Aggregate Max. working
temp.[oC]
Min. common
refractoriness sP
Min. Al2O3
content [%]
Concrete consumption [t/m3] Make-up water amount [l/100kg]

BM50/N

0-3   1500 177 51 2,4 5

BM60/N

0-3   1550 177 60 2,45 5

BM70/N

0-3 white aloxite 1650 177 70 2,65 6

BM80/N

0-5 white aloxite 1700 177 78 2,75 6

Technical parameters after drying and baking

Symbol after drying in 110 °C after baking in working temperature
Effective porosity
[%]
Apparent density
[g/cm3]
Shear strength
[MPa]
Effective porosity
[%]
Apparent density
[g/cm3]
Shear strength
[MPa]
Contraction (-) [%]

BM50/N

    80     80 -1

BM60/N

    65     105 -1

BM70/N

    95     100 + 0,2

BM80/N

17 2,7 50 19 2,73 90 +/- 0,3

APPLICATION:
- in steel ladles in iron and steel metallurgy,
- in blast furnaces as bottom lining – a "ceramic cup",
- in glass furnace regenerators.

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