Page 65 - 2023 Sustainability Report

ENVIRONMENTAL STEWARDSHIP

Our Midlothian Cement facility
Midlothian, Texas

Initiatives to Reduce Our Carbon Despite these regulatory constraints, Martin Marietta views
Intensity the use of alternate fuels and improving fuel efficiency as
important components of our overall commitment to
Although our actual carbon emissions from clinker
sustainability, including climate change-related issues and
production may be comparable to or better than European
concerns. In this regard, in addition to significant plant
producers, their ability to calculate reportable CO 2 upgrades and other modernization in which we have
emissions differently leads, in part, to a seemingly lower
invested, our accomplishments include the following:
carbon intensity calculation.
Simply put, because U.S. producers are more heavily regulated • As noted in prior Sustainability Reports, we have made a
if they wish to use alternative fuels, and must report a greater significant investment in tire processing systems at our
amount of the related CO emissions from such fuels than Midlothian Cement Plant. In total between our two
2
their European competitors, and must use a higher percentage plants, tires made up nearly 30 percent of our fuel mix in
of clinker in domestic cement, carbon intensities are effectively 2023.
calculated differently for U.S. and European producers. We • In the last seven years, we have dramatically reduced the
believe that our track record of achieving comparably use of coal in our kiln fuel mixes at both cement plants
favorable clinker intensities to European producers, despite key from almost 70 percent to 9 percent of our total fuel
regulatory differences that give us fewer options for easily usage. In 2023 we completed a natural gas pipeline
reducing emissions through clinker substitution and alternative project to obtain additional supplies of natural gas at
fuel use in the U.S., highlights our record of investing in our Hunter as an alternative to coal use.
plants and continually improving our processes. It further
• In late 2021, CALTRANS approved the use of Portland
underscores our continued dedication to sustainable practices
Limestone Cement (PLC) Cement in its specification.
in our operations.
TXDOT has also approved PLC in its standard
specification. Accordingly, we converted approximately
“Despite these regulatory constraints, 90% of our Type I/II customers to our new Type 1L at
our two Texas plants. We estimate that this contributed
Martin Marietta views the use of to the 10.8% reduction in Scope 1 emissions in our
alternate fuels and improving fuel heritage cement business.
efficiency as important components

of our overall commitment to

sustainability, including climate
change-related issues and concerns.”

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