VideRime Staff asked 4 years ago
For the manufacture of Portland cement, the proportions of raw materials used, are
a) Lime 63% ; silica 22% ; other ingredients 15%
b) Lime 22% ; silica 63% ; other ingredients 15%
c) Silica 40% ; lime 40% ; other ingredients 20%
d) Silica 70% ; lime 20% ; other ingredients 10%
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