The Slag Cement Association (SCA) represents companies that produce and ship over 90 percent of the slag cement (ground granulated blast furnace slag) in the U.S.  The SCA's mission is "To serve as the leading source of knowledge for slag cement and slag blended cements through continuous research, promotion and education. To communicate the performance and environmental benefits of these cementitious materials in the United States through the support and participation of member companies”.