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)
Portland cement
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Portland cement is the most common type of cement in general use around the world as a basic ingredient of concrete, mortar, stucco, and non-specialty grout. It was developed from other types of hydra
Bags of Portland cement wrapped and stacked on a pallet.
Blue Circle Southern Cement works near Berrima, New South Wales, Australia.
Plaque in Leeds, England commemorating Joseph Aspdin
William Aspdin is considered the inventor of "modern" Portland cement.