Cement production accounts for 8% of global CO2 emissions, but a new electrochemical process developed at the University of British Columbia could change that — cutting emissions by 98% and energy demand by 70%.
Cement is one of the most widely used materials in the world, and also one of the most carbon-intensive to produce. Every ton of cement made through conventional methods releases roughly 800 kilograms of CO2 into the atmosphere — a staggering figure that makes the industry responsible for about 8% of global carbon dioxide emissions. Now, researchers at the University of British Columbia have developed an electricity-driven process that could slash those emissions by as much as 98%, according to a study published in ACS Energy Letters.
The findings represent a significant breakthrough at a moment when climate scientists and policymakers are urgently searching for ways to decarbonize industries beyond the energy sector. While solar panels and electric vehicles have captured the spotlight in recent years, hard-to-abate industries like cement have remained stubbornly dependent on fossil fuels and high-heat manufacturing processes. This research offers a potential road map for changing that.
Why Cement Is Such a Climate Problem
Traditional cement production begins with limestone, a rock composed primarily of calcium carbonate. Manufacturers heat limestone alongside silica-containing minerals in two high-temperature stages, reaching more than 2,600 degrees Fahrenheit (1,450 degrees Celsius). The process releases CO2 not only from the burning of fossil fuels to generate that heat, but also as a direct chemical byproduct when calcium carbonate breaks down. That dual source of emissions makes cement exceptionally difficult to clean up using conventional approaches.
The resulting material — a powdery binder that, when mixed with water, locks sand and gravel into solid concrete — underpins virtually all modern construction, from residential buildings and highways to massive infrastructure projects like dams and bridges. Global demand for cement is not expected to decline anytime soon, which makes decarbonizing its production all the more urgent.
How the New Process Works
The UBC team, led by corresponding author Curtis Berlinguette, a professor of chemistry, took a fundamentally different approach by harnessing electrochemistry. Instead of relying on extreme heat to drive the conversion of limestone and silica into a cement precursor, their method uses electricity to facilitate the reaction at just 140 degrees Fahrenheit (60 degrees Celsius) — a fraction of the temperature required by traditional kilns.
“Our team was motivated to address cement production emissions at the source,” Berlinguette said in a news release. “We used electricity and recycled cement to make precursors that formed a type of cement called belite at lower temperatures than were previously known. Belite-rich cement is important for massive structures like dams.”
The product of this electrochemical reaction is then transferred to a kiln for a second step, where it is converted into belite — a mineral phase found in certain cement formulations — at 1,200 degrees Fahrenheit (650 degrees Celsius). That is still hot, but substantially cooler than conventional processes. Altogether, the two-stage method reduces thermal energy requirements by 70% compared with traditional cement manufacturing.
Belite-rich cement, Berlinguette notes, is particularly well-suited for large-scale infrastructure. It sets more slowly than conventional cement but ultimately achieves comparable or superior strength — making it a practical material for dams, foundations and other massive structures where durability matters most.
Recycled Cement Pushes Emissions Even Lower
The most striking result came when the team replaced limestone with recycled waste cement as the feedstock for the electrochemical process. Because waste cement has already undergone the CO2-releasing breakdown of calcium carbonate, using it as a starting material largely eliminates that emission source. With waste cement as the input, the process produced only 20 kilograms of CO2 per ton — compared with the 800 kilograms per ton generated by conventional methods.
“This work defines an electrified path for cement production that could reduce the industry’s massive carbon footprint by as much as 98% when using waste cement as a feedstock,” Berlinguette added.
The electrochemical reactions also generate hydrogen as a byproduct. The researchers point out that this hydrogen could be captured and burned to supply the thermal energy needed for the kiln step, potentially replacing fossil fuels in that stage as well. That closed-loop potential makes the system even more attractive from a sustainability standpoint.
What This Means for Students and the Future of Construction
For college students studying engineering, environmental science, materials science, or public policy, this research highlights a growing frontier in industrial decarbonization. The construction sector has long been considered one of the hardest industries to clean up — not because the will is lacking, but because the technical and economic barriers are formidable. Innovations like this one show that electrochemistry, increasingly cheap renewable electricity, and circular materials strategies could together crack problems that once seemed intractable.
The University of British Columbia has filed an international patent application covering the process, and two of the paper’s authors are co-founders of a company working to bring the technology to market. That commercialization pathway suggests the research is not purely theoretical — there is genuine momentum toward scaling it up.
The study received funding from the New Frontiers in Research Fund, the Natural Sciences and Engineering Research Council of Canada, the Canada Foundation for Innovation, the Canadian Institute for Advanced Research, Canada Research Chairs, and the Canada First Research Excellence Fund.
Source: American Chemical Society