Fire-resistant mortar is obtained by the addition of ____________ to the powder of fire-bricks.
(a) Silica
(b) Sodium silicate
(c) Aluminous cement
(d) Caustic soda
The question was posed to me in semester exam.
This intriguing question originated from Mortar topic in portion Steel, Timber, Mortar, Plastics, Non-Ferrous Metals and Alloys of Construction & Building Materials