Pile of Slag

The ultimate sustainable product


Join us for the for the 100th year celebration of the National Slag Association.

This year we are celebrating our 100th year as an association September 4th - 7th and are inviting you to join us at the Gaylord National Resort in Oxon Hill, Maryland. As of July 1st, we will be adding registration information.


Since 1918, The NSA has promoted the use of Blast Furnace and Steel Furnace Slag. Blast Furnace slag has been called the "All-Purpose Aggregate" as it can be used in all construction applications as either a normal weight or lightweight (expanded or pelletized) aggregate depending on how it was formed and processed. Blast Furnace Slag is also quickly quenched by water or air to produce Granulated Blast Furnace Slag.