Page 70 - Martin Marietta - 2024 Sustainability Report

ENVIRONMENTAL STEWARDSHIP

Our Roadmap to our 2030 Targets and our NET ZERO
2050 Ambition

Our roadmap to achieving our reduction targets and our newly adopted ambition includes numerous actions we have
committed to, through current or recent investments and operational improvements, as well as future steps we are
evaluating, including:

Coal replacement and tire derived fuel (TDF) investments • We have deployed 41 hybrid wheel loaders across our

• In the last six years we invested in tire handling systems footprint. We continue to evaluate them in a variety of
at both the Midlothian and Hunter Cement Plants. In conditions. Initial results are promising and it appears
2024 tires made up 41% of our fuel mix at our they are 20% more fuel efficient than a comparable
Midlothian plant traditional diesel loader. We are working with our other
heavy equipment vendors as they develop their own
• Prior to its divestiture, we completed construction of a
heavy electric and hybrid vehicle technology. For
larger natural gas line to the Hunter Cement Plant and
example, in 2024 we deployed 2 Liebherr Electric/
further reduced our coal usage
Hydraulic Excavators
• We have reduced coal in the fuel mix at our Midlothian
• Continued upgrading our mobile equipment fleets to
Cement Plant from a high of almost 70% to 6.7%
newer, cleaner burning equipment
Use of additional alternative fuels, including the
Operational improvements
purchase of wind energy and other renewables
• Adding slag to our process, using our CemStar patented
• In 2024 we continued to make use of Biodiesel in our
technology. In 2024, the slag addition represented over
Midwest Division, lowering our lifecycle GHG emissions
3% of our clinker production
by over 30,000 metric tonnes of CO compared to using
2
ordinary diesel • Completed a $135 million modernization of our Finish
Mill 7 at the Midlothian Cement Plant, which will
• At our Woodville, Ohio lime Magnesia Specialties plant
increase efficiency and reduce energy consumption at
we completed a wind energy project that will provide
the facility.
much of the power needed to operate the facility
• Constructed three new loadout silos for customer trucks
• We are currently evaluating both wind and solar power
at the Midlothian Cement Plant. In addition to increasing
projects across our businesses
cement storage capacity, these silos have reducied
Rollout of PLC Cement loadout cycle times by as much as 40 percent with an
• With the approval of PLC Cement by both CALTRANS and attendant reduction in diesel emissions (Scope 3) from
TXDOT, in 2022 we embarked on a rollout of this product customer truck idling
• We converted 90% of our Type I/II customers to our Investments in our business to develop and market
Type 1L (PLC) product products that deliver meaningful environmental
• PLC Cements contributed to the reduction of the GHG benefits, including reducing emissions and chemical
footprint of our cement business in both actual tonnes use
and on an intensity basis • Scrubber stone produced by our limestone operations
Capital investments in more efficient, lower is used by power producers and chemical manufacturers
emission transportation systems and emissions in controlling sulfur dioxide emissions
reduction equipment • Products manufactured by our Magnesia Specialties
• Reduced fuel use in our aggregates business by business assist in purifying industrial and municipal
converting from quarry trucks to conveyor belt systems wastewater, controlling sulfur dioxide in power plant gas
in multiple locations, right-sizing trucks and installing streams, neutralizing nuclear waste and reducing
fleet management software chemical usage and wood demand in paper production

68 2024 SUSTAINABILITY REPORT