Ozinga Opens 1M-Ton Slag Cement Mill in East Chicago
CHICAGO – October 13, 2026 -- Ozinga has opened a slag cement mill in East Chicago, Indiana, with capacity of 1 million tons per year. The company calls it the largest of its kind in North America. Its blends are designed to cut embodied carbon by up to 80% compared with traditional Portland cement mixes.
Mill targets 700,000 metric tons of annual CO2 offsets
At full operation, the plant is projected to offset more than 700,000 metric tons of CO2 emissions a year. Ozinga equates that to taking more than 150,000 gasoline-powered passenger vehicles off the road for a year.
The facility will produce ASTM C989-compliant slag cement. It will also make proprietary blends under the CarbonSenseTM brand that meet ASTM C1157 performance standards. The process recycles slag, a by-product of steelmaking. Traditional Portland cement accounts for nearly 7% of global CO2 emissions.