Completed in April 2001, St. Lawrence Cement's $60 million state-of-the-art GranCem facility in Camden, N.J., is the largest of its type in the world and the only one in the Eastern United States. It produces a portland cement and concrete additive called GranCem, a premium GGBFS (Ground Granulated Blast Furnace Slag) with multiple advantages for the cement and construction industries. St. Lawrence's Camden facility imports high-grade granulated slag from steel and iron mills in Japan and Italy and grinds it in the world's largest vertical roller mill to produce the extremely fine powder product GranCem, which pound for pound can replace a portion of the other ingredients in cement mixtures.

Reported benefits include improved uniformity, workability and pumpability; increased compressive and flexural strength (concrete fortified with GranCem can resist 13,000 lb of pressure per sq in.); greatly reduced permeability, i.e., reduced levels of CaOH₂ in GranCem-enhanced concrete; improved resistance to chemicals such as sulfates and protection against alkali-silica reaction; reduced heat of hydration (crucial for very large concrete applications); enhanced aesthetics due to a whiter concrete facilitating brighter colors; and, reduction of the waste stream by the environmentally sound practice of utilizing by-products of iron and steel production.

Furthermore, St. Lawrence will strive to ensure that its Camden GranCem plant is in strict accordance with environmental regulations. The facility's stack emissions tested most recently several months ago registered lower than half the allowable limit as established by the NJDEP's (New Jersey Department of Environmental Protection) Stack Emissions Review.