Production of granulated blast furnace slag is used to make Ecocem, a superior slag cement ideal for underwater applications.
Slag is a by-product of iron and steel making. In nature, the ores of metals are found in impure states, often oxidized and mixed in with silicates or other metals. During iron and steel making, when the ore is exposed to high temperatures, these impurities are separated from the molten metal and removed as slag.
Through determining its many uses, it was found that ground granulated slag reacts with water to produce cementitious properties. It could therefore be used in concrete, in combination with Portland cement, as a blended cement. Concrete containing ground granulated slag develops strength over a longer period, leading to reduced permeability and more durability properties. Since the unit volume of Portland cement will also be reduced, concrete is less vulnerable to alkali-silica and sulfate attack.
Processing blast furnace slag into slag cement or slag aggregate eases the burden on our environment in a number of ways. It reduces the air emissions at the blast furnace as well as the material in landfills. Slag decreases Portland cement usage by as much as 50 percent, thereby diminishing CO2 emissions.
Typical mix designs for structural or paving concrete normally use substitution rates between 25 and 50 percent; high-performance and mass concrete applications can use substitution rates up to 80 percent. Approximately one ton of CO2 is released for every ton of Portland cement produced. The benefits of substituting 50 percent slag cement in various concrete mixtures results in between 165 and 374 pounds of CO2 saved per cubic yard of concrete. By using a 50 percent slag cement substitution, a 42 to 46 percent reduction in greenhouse gas emissions can result.
Slag 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 slag reduces the embodied energy in a cubic yard of concrete by 30 to 48 percent.
Raw materials for Portland cement are gathered through mining operations. A ton of Portland cement actually requires about 1.6 tons of raw materials. Substituting 50 percent slag cement can save between 281 and 640 pounds of virgin material per cubic yard of concrete.
Levy, through its jointly held company Superior Materials Holdings LLC, produces high-quality ready-mix concrete using both natural and lightweight aggregates to enhance the properties and performance of the final product. Superior Materials Holdings LLC is a ready mix concrete supplier with seventeen production facilities and multiple portable ready mix plants located in southeastern and greater Lansing, Michigan.
The local company names are known as:
Superior’s Quality Assurance & Quality Control team combined with our in-house concrete laboratory, has produced products that meet and exceed your expectations. We perform regularly for commercial, MDOT, specialty and residential applications.
Midway Group LLC, dba Protocon RM is a jointly held company with 313 Ready Mix, LLC that produces and delivers ready-mix concrete from locations in Washington and Sterling Heights, Michigan.
“Producing products to exact specifications on a consistent basis is imperative to meet customers’material requirements. At Levy,we achieve process excellence using proven practices that we have perfected over time, including recycling, conservation, benchmarking, preventive maintenance, and other technologically-advanced methods. By measuring and monitoring these key processes and conducting purpose-focused and ongoing training to keep abreast of the most effective quality control measures, we are able to define and refine our operations to ensure that we are performing at optimum production and quality levels.”
A LEVY EMPLOYEE SINCE 1993