Since the launch of the Roadmap, substantial progress has been made. We are very proud of what the industry has accomplished together so far and are excited to see what’s next.


In the Roadmap, PCA recommended a swift and widespread shift from regular cement to portland-limestone cement (PLC), a mix that is already widely used in Europe and can immediately reduce CO2 emissions by about 10%.

As of 2024, excitingly, all 50 state Departments of Transportation, major consumers of cement, have formally approved the use of PLC.

In California alone, the shift to PLC could result in 786,000 tonnes of CO2 potentially saved per year if a 100% shift to PLC occurred.

As of March 2024, approximately 50% of the cement produced by PCA members is PLC, with some companies exclusively producing PLC.

The cement industry has also called for increased funding for research and development for carbon capture, utilization and storage – CCUS. The recently passed Inflation Reduction Act has provided important updates, including greater incentives for the cement industry to develop, install and operate carbon capture and storage technologies at its facilities.

We are taking a lead in pilot projects, testing the commercial use of carbon capture in partnership with the Department of Energy, with six projects currently underway at U.S. cement plants.

Cement manufacturers are constantly pushing efficiency and looking for available, lower-carbon fuel for plants. The industry has reduced traditional fossil fuels by 15%, with 60 plants using lower-carbon sources of energy.

Reducing Emissions at the Cement Plant Focuses on the Production of Clinker and Cement

Optimizing Clinker

The first step in making cement is producing a binding ingredient called clinker. The production of clinker is a major source of CO2, accounting for more than 60% of the emissions from cement manufacturing.

There’s a lot of opportunity to cut emissions at this step.

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Optimizing Cement

When mixed with water, cement holds aggregates together and forms concrete.

Optimizing the ingredients in cement not only enhances the benefits of cement-based products, but also reduces the carbon intensity of cements.

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Sustainability Progress

Engaging local policymakers to advance carbon reduction goals

Heidelberg Materials established dialogue with state policymakers to educate, inform, and exchange perspectives to collaborate on statewide decarbonization goals.

Shifting production to lower carbon cement is essential

Ash Grove South announced in 2021 a 100% shift to producing portland-limestone cement, reducing emissions up to 10%.

Curbing energy demand

Roanoke Cement Co., A Titan America Company, is making progress across clean manufacturing practices.

A twofold approach to displacing traditional fossil fuels

Giant Cement Company and sister company Giant Resource Recovery (GRR!) are addressing excess waste while making significant strides in reducing carbon emissions.

Carbon capture technology can work for more than just the cement industry

Heidelberg Materials is investing in CCUS projects and has released a company roadmap that ensures our company actions are aligned with reducing emissions in the long-term.

Creating a circular energy economy

Continental Cement is reducing the carbon intensity of its operations through the use of alternative fuels and increased onsite energy efficiency, along with producing and promoting PLC.

Using algae as a carbon capture solution

Votorantim Cimentos North America is piloting a program using a bio-reactor filled with algae, which feed on carbon dioxide.

Using renewable energy

Buzzi Unicem is investing in renewable energy, furthering research into new technologies and placing a ‘sustainability mindset’ at the forefront.