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.

Join the National Slag Association!


   Leadership Meeting – January 26th, 2022,  9:00 am to 1:00 pm Horsham PA

Marketing, Technical, Environmental  Committee Spring Meetings –        March  9th,  2022,  9:00 am to 1:00 pm Location TBD

Procurement, Operations, Safety, Allied Committee Spring Meetings –     March 17th,  2022,  9:00 am to 1:00 pm, Charlotte NC

Procurement, Operations, Safety, Allied Committee Summer Meetings –    June 22nd, 2022,  9:00 am to 1:00 pm, New Castle PA

Marketing, Technical, Environmental  Committee Summer Meetings –         July 13th,  2022,  9:00 am to 1:00 pm Location TBD

NSA 2022  Annual Meeting –  September 18th– September 20th, 2022  Wild Dunes SC


The NSA would like to congratulate Mellott Companies’ on their 100-year anniversary as an organization.   Mellott Company has helped redefine the industry through their crushing experience, equipment service and machining capabilities, vast inventory of parts and equipment, reputation as a quality supplier, systems engineering work, and so much more.   The NSA looks forward to the  continued long term fruitful collaboration with Mellott and wish them success as they embark on another 100 years journey as an aggregate industry leader.  Please join us in celebrating with Mellott company and all its employees past and present on achieving this significant milestone.

Upcoming Events

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