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Slag Replacement

R-E-D Slag Replacement

Slag Replacement is a by-product of pig iron production from a blast furnace.  Consisting primarily of silicate and aluminosilicates, Slag Replacement makes concrete more durable and sustainable.   Slag Replacement is a supplementary cementitious material (SCMs) that increases durability and strength.  Further, Slag Replacement can decrease thermal cracking, increase resistance to sulfates, chlorides, and mitigate ASR.  Slag Replacement is sustainable as it makes low CO2 concrete and reduces embodied carbon and waste in landfills. Slag Replacement can be used in a variety of applications in mix-design, precast, and other cement-based processes.  It can be used for high-strength projects, such as dams and foundations.  Slag Replacement can be mixed into concrete designs for precast, used in high-volume mortar applications, and in paving projects.    The use of Slag Replacement produces a lighter-colored finish compared to other (SCMs) such as silica fume and fly ash.

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Slag Replacement & Sustainability

We provide real-world solutions to sustainability challenges when using R-E-D Industrial Products Slag Replacement. We stand by the durability of our Slag Replacement and its ability to ensure strength into the future. See how Slag Replacement can help you with your next project's sustainability needs by reading the information below. 


Applicability for Sustainability:
  • Increase concrete strength 

  • Reduction permeability 

  • Resistant against corrosion 

  • Reduction of cracking 

  • Stands up against an internal chemical attack

  • Decreased embodied energy 


  • When used in tandem with traditional Portland cement it increases strength extending the life cycle cost

  • Increase structural life when used as a cement replacement, it can be used as a partial or full replacement of cement cutting back on greenhouse gas emissions

  • Increases concrete longevity, especially in areas where concrete is surrounded by or subject to high levels of water or corrosive natural elements such as bridges, tunnels, and dams

  • Its low permeability protects reinforcing steel and rebar from internal chemical attacks 


  • Decreased embodied energy (the amount of energy used from production to transportation and delivery)

  • Decreases the urban heat island effect which is a direct contributor to increased energy costs and air pollution

  • Reduction of greenhouse gas emissions that contribute to climate change 

  • Avoids having a byproduct that is otherwise useless from being landfilled and increasing industry waste 

  • Overall reduction of the environmental impact of concrete mixtures


Sustainability Fact: issues related to urban heat islands jeopardize more people in the United States than hurricanes, floods, tornadoes, and lightning combined [1].


[1] “Urban Heat Islands.” The Nature Conservancy, 22 July 2019, https://www.nature.org/en-us/about-us/where-we-work/united-states/pennsylvania/stories-in-pennsylvania/pennsylvania-heat-islands/.