Building Materials
Asbestos

Contains iron oxide and alumina
All of these
Is composed of hydrous silicates of calcium and magnesium (CaSiO3, 3MgSiO3)
Is a natural fibrous mineral substance

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Building Materials
Pick up correct statement from the following:

Fibre boards are obtained by impregnating a resin product on fibres
All listed here
Fibre boards are used for light weight standing members
Fibre boards are used for thermal and acoustic control

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Building Materials
Rapid hardening cement attains early strength due to

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

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