The technical index of calcium alumina cement :
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AL-70
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AL-75
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AL-80
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AL-85
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Chemical Composition
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|||||
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Al2O3
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%
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68-71
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74-76
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78-82
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83-85
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CaO
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%
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<30
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<24
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<20
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<14
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SiO2
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%
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<0.3
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<0.3
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<0.3
|
<0.3
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Fe2O3
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%
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<0.2
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<0.2
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<0.2
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<0.2
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Fineness
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Cm2/g
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>6000
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>6000
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>8000
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8000-10000
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Physical Properties
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Setting Time
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Initial Set
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h:min
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>0:30
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>0:30
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>0:30
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>0:30
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Final Set
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h:min
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<2:00
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<2:00
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<12:00
|
<12:00
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Shock flow value
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|||||
|
F30
|
mm
|
120-150
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120-150
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130-140
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130-140
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Rupture Strength
|
|||||
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Keep for 24hrs at 20°C
|
Mpa
|
>6
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>6
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>6
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>4
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Drying for 24hrs at 110°C
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Mpa
|
>8
|
>8
|
>8
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>6
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|
Baking at 1100°C and staying warm for 3hrs
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Mpa
|
>10
|
>10
|
>9
|
>8
|
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Compressive Strength
|
|||||
|
Keep for 24hrs at 20°C
|
Mpa
|
>50
|
>50
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>40
|
>40
|
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Drying for 24hrs at 110°C
|
Mpa
|
>70
|
>70
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>60
|
>60
|
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Baking at 1100°C and staying warm for 3hrs
|
Mpa
|
>80
|
>80
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>75
|
>75
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