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| Ozinga posted We have officially cut the ribbon on our new slag cement mill in East Chicago, Indiana! This is a proud milestone for our team, for Midwest construction, and for every project team working to reduce embodied carbon without giving up performance. Slag is produced during steelmaking. Instead of letting it go to waste, we recycle it into high-performance slag cement. At full capacity, the mill will produce one million tons of slag cement every year. The mill is projected to offset more than 700,000 metric tons of CO₂ annually, the equivalent of taking more than 150,000 gasoline-powered cars off the road for a year. Our CarbonSense blends deliver up to 80% less embodied carbon than traditional Portland cement mixes, and all products meet ASTM C989 and ASTM C1157 performance standards, giving designers and specifiers a compliant path to lower-carbon concrete. Supply constraints have led to allocations, delays, and price swings for Portland cement in recent years. Direct rail, water, and highway access lets us move material reliably across the Midwest and beyond. One barge carries the equivalent of 75 semi-trucks, which also lowers the total embodied carbon of every ton we ship. "We built this mill in the heart of the Midwest because we believe it is central to producing high-performing, American-made materials that will be the foundation of U.S. infrastructure for years to come. We are taking the cement-to-concrete process from start to finish, with American ownership at every step of the domestic supply chain, with homegrown scientific innovation, and with American workers all the way." - Marty Ozinga We're grateful to Gov. Mike Braun, U.S. Sen. Todd Young, U.S. Rep. Frank J. Mrvan, East Chicago Mayor Anthony Copeland, the East Chicago City Council, Morrison Construction, and many other partners and vendors, for helping bring this vision to life. Clarence Deckinga: Y didn’t they use slag years ago for cement has the slag changed recently. Ima Psuedonym: Clarence Deckinga Slag has been around for decades. We started blending it with Portland cement back in the early 90’s when Cement companies started using waste products as fuel for the kilns. The waste fuel adversely affected the strength gain of the Portland. Ground Granulated Blast Furnace Slag has a high percentage of calcium silicates to interact with the Portland’s high percentage of calcium aluminates, resulting in better concrete. |
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| Ozinga North America’s Largest Low-Carbon Cement Mill At the heart of the facility is the MVR5300-C6 vertical roller mill from Gebr. Pfeiffer, the largest of its kind in North America. With six independent rollers and unmatched throughput capacity, the mill maximizes energy efficiency while minimizing carbon emissions. “This isn’t just a plant—it’s a technological milestone,” said Timothy Burden, President of Gebr. Pfeiffer Americas. “The MVR5300-C6 sets a new benchmark for sustainable cement production.” The facility will produce ASTM C989-compliant low-carbon slag cement, as well as proprietary blends under Ozinga’s CarbonSense™ brand, meeting ASTM C1157 performance standards and delivering up to 80% reductions in embodied carbon. Once fully operational, the plant is projected to offset more than 700,000 metric tons of CO₂ emissions annually, a significant reduction in the carbon footprint of U.S. construction. Ozinga’s leadership in sustainable building materials has been strengthened by partnerships with Meta, the University of Illinois Urbana-Champaign, and other industry leaders. These collaborations have yielded AI-optimized low-carbon concrete, used in Meta’s DeKalb, IL data center, and enabled a 64% reduction in embodied carbon at the award-winning Amazon Web Services New Carlisle, IN data center, setting a new industry benchmark. |
As of the Oct 2026 ribbon cutting, Ozinga's location map doesn't mark the location.
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The plant is served by the IHB.
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| RailwayAge "IHB (map above) encircles Chicago, extending from near O’Hare to Northwest Indiana, and roughly parallels Interstate 294 (Tri-State Expressway) and I-80/94. Our diverse business portfolio encompasses steel, automotive, and oil-related commodities. It also extends eastward for 16 miles on trackage rights to access Burns Harbor and Portage, Ind., including Indiana’s International Port. (Courtesy of IHB)" |
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