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متالوژی::
آلومینای واکنشپذیر ( راکتیو )
Microsilica/reactive alumina (vol%) 100/0 75/25 50/50 25/75 0/100 Weight %:
The castables have all the same PSD, but the superfines fraction is' modified form pure microsilica through mixtures to pure reactive alumina (CT3000SG from ALCOA).
The reactive alumina was chosen because of similar PSD as microsilica when measured by laser diffraction.
When microsilica is substituted by reactive alumina on a volume basis, then 2wt% microsilica has to be replaced by 3.5wt% reactive alumina.
Another effect caused by differences in density is that by substituting microsilica with reactive alumina, the amount of water to make a given volume percent water addition is lowered.
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