Page 45 - 2021 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
upgrades and other modernization in which we have
producers, their ability to calculate reportable CO 2
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 • As noted in prior Sustainability Reports, we have made a
regulated if they wish to use alternative fuels in production, significant investment in tire processing systems at our
must report a greater amount of the related CO emissions Midlothian Cement Plant and are actively exploring
2
from such fuels than their European competitors and use adding additional equipment to our Hunter Cement
more higher-CO clinker in cement, carbon intensities are Plant in the next several years. In total between our two
2
effectively calculated differently for U.S. and European plants, tires made up 26.8 percent of our fuel mix in
producers. We believe that our track record of achieving 2021.
comparably favorable clinker intensities to European • In the last seven years, we have dramatically reduced the
producers, despite key regulatory differences that give us use of coal in our kiln fuel mixes at both cement plants
fewer options for easily reducing emissions through clinker from almost 70 percent to 13.5 percent of our total fuel
substitution and alternative fuel use in the U.S., highlights our usage. We are actively engaged in a pipeline project to
record of investing in our plants and continually improving obtain additional supplies of natural gas at Hunter as an
our processes. It further underscores our continued dedication alternative to coal use. We expect this project to be
to sustainable practices in our operations. completed late in 2022.
• In late 2021, CALTRANS approved the use of Portland
“Despite these regulatory constraints, Limestone Cement (PLC) Cement in its specification, and
has given specific approval to our Type 595 IL at both
Martin Marietta views the use of California Cement plants that we acquired from Lehigh
alternate fuels and improving fuel Hanson. TXDOT has also approved PLC in its standard
specification and we are rolling out our new Type 1L at
efficiency as important components
our two Texas plants. It is estimated that PLC cement
of our overall commitment to production will reduce GHG emissions by up to 10
percent per ton of cement.
sustainability, including climate
change-related issues and concerns.”

MARTIN MARIETTA 43