Building Materials
During pudding

Silicon forms a slag
Molten metal is kept clear of the fuel
All listed here
Carbon is converted into carbonic acid gas

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Building Materials
Rapid hardening cement attains early strength due to

Lesser proportion of lime grounded coarser than normal cement
Larger proportion of lime grounded finer than normal cement
Excess percentage of gypsum
Lesser proportion of lime grounded finer than normal cement

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