Welcome to Skyway Cement Company

Skyway Cement Company produces Slag cement, which is a valued construction material due to its superior performance and environmental qualities. Skyway’s manufacturing facility is located in southeast Chicago near the Skyway Bridge.


Skyway Cement is used in a wide variety of commercial and architectural concrete construction applications which include cast-in place, precast, bridges, roads, pipe, block, pre-stress, mass concrete, masonry mortars, grouts, waste solidification and soil stabilization. Skyway Cement is particularly suitable for providing light color, resistance to sulfate and alkali-silica reaction (ASR), low permeability and low heat for mass-concrete applications.


Using Skyway Cement to replace a portion of Portland cement in concrete is a useful method to enhance concrete characteristics and provide better consistency. Among the measurable improvements are:

Flex Graph• Better concrete workability
• Easier finishability
• Higher compressive and flexural strengths
• Lower permeability
• Improved resistance to sulfates and ASR
• More consistent plastic and hardened properties
• Lighter color




green-world1Blast-furnace slag is produced in a blast furnace during the reduction of iron ore to iron. It consists of non-metallic minerals, which are tapped off from the blast furnace while molten. By processing blast furnace slag into Skyway Cement or slag aggregate, the material is diverted from landfills. Utilization of Skyway Cement in concrete not only lessens the burden on landfills, it also conserves a virgin manufactured product (Portland cement), reduces air emissions at the blast furnace and, through the avoided manufacture of Portland cement, decreases the amount of energy required to produce the cementitious materials in concrete.
Skyway Cement requires nearly 90 percent less energy to produce than an equivalent amount of Portland cement. Reducing the use of Portland cement in concrete by substituting a portion of it with Skyway Cement significantly reduces the total energy in a cubic yard of concrete, since Portland cement constitutes 70 percent or more of this energy in concrete.
Our commitment to a clean environment and safety is a job that we take very seriously. We operate under strict guidelines set by the U.S. EPA and the States we operate in. Our environmental program strives to go beyond just what is required. Our goal is to work hard every day to try to meet expectations for a clean, safe, and successful plant that our communities are proud of.

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