More Concrete Suppliers Switch to Portland Limestone Cement, Opening New Environmentally-Friendly Options for Construction

As one of the leading concrete testing facilities in  Ohio, CTL Engineering regularly tests new mix designs produced by local concrete suppliers in their AASHTO-accredited materials laboratories. This gives CTL unique insight into the changing concrete market and what products are available.

In recent months, local suppliers have had a big push to begin using Portland Limestone Cement (PLC, or ASTM C595 Type IL), a change that can reduce concrete carbon emissions by as much as 10 percent.

In Ohio, this change has been largely prompted by the Ohio Department of Transportation, which released a memo earlier this year that allows for a 1:1 replacement of Type I and Type I/II (traditional) cement with Portland Limestone Cement in concrete mix designs.