Building Materials
The rocks which are formed due to pouring of magma at the earth's surface are called

Volcanic rocks
Igneous rocks
Plutonic rocks
Hypabyssal rocks

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Building Materials
Rapid hardening cement attains early strength due to

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

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