Efflorescence
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In chemistry, efflorescence is the migration of a salt to the surface of a porous material, where it forms a coating. The essential process involves the dissolving of an internally held salt in water
Secondary efflorescence on the dam of the Robert Moses Niagara Power Plant.
Primary efflorescence on a brick wall in Germany.
Primary efflorescence on a firestop mortar at Mississauga Civic Centre in Mississauga, Ontario City Hall.
Substantial primary efflorescence on a building in Denver, Colorado.
Ground granulated blast-furnace slag is obtained by quenching molten iron slag from a blast furnace in water or steam, to produce a glassy, granular product that is then dried and ground into a fine p
Samples of "ground granulated blast furnace slag" (left) and "granulated blast furnace slag" (right)