A cubic meter of conventional concrete releases roughly 330 kilograms of carbon dioxide into the atmosphere. The new material developed by engineers at Worcester Polytechnic Institute does the opposite: it locks away more than 6 kilograms of CO₂ during production and hardens into a strong, durable solid within hours, not weeks.
The material, called enzymatic structural material, or ESM, was described in the journal Matter. It uses an enzyme to accelerate a reaction that converts carbon dioxide into solid calcium carbonate minerals, which then become the structural backbone of the finished product.
“Concrete is the most widely used construction material on the planet, and its production accounts for nearly 8% of global CO2 emissions,” said Nima Rahbar, the Ralph H. White Family Distinguished Professor and head of the Department of Civil, Environmental, and Architectural Engineering at WPI, who led the research team. “What our team has developed is a practical, scalable alternative that doesn’t just reduce emissions—it actually captures carbon.”
The Enzyme Drives a Mineralization Reaction
At the center of the process is the enzyme carbonic anhydrase. The enzyme catalyzes the combination of water and CO₂ to form carbonic acid, which then precipitates with calcium to produce solid calcite crystals.
The researchers bound these mineral particles together using a capillary suspension technique that incorporates a carbon-rich scaffold. After thermal curing under mild conditions, the process yields a hydrophobic carbon backbone that stabilizes the calcium carbonate and bonds sand particles at an optimized porosity.
The result is a ternary composite material that can be molded into structural shapes and hardened in hours. Traditional concrete, by contrast, requires high-temperature clinker production and can take 28 days to fully cure.
The team reported that ESM achieves an average compressive strength of 25.8 megapascals, which exceeds the minimum strength threshold for structural concrete. The material also maintained high water stability with only minimal strength reduction under humid conditions.
A Stark Difference in Carbon Accounting
The carbon differential between ESM and conventional concrete is among the most striking elements of the research. According to the study, producing one cubic meter of ESM sequesters 6.1 kilograms of CO₂.
Conventional concrete production emits approximately 330 kilograms of CO₂ per cubic meter. The researchers cited life cycle assessments indicating that producing a single cubic meter of concrete also consumes 1,579 megajoules of energy.
The building and construction sector accounts for 40 percent of global energy consumption and 33 percent of greenhouse gas emissions, the study noted, citing a World Economic Forum report. Concrete’s contribution to construction-related emissions remains disproportionate because clinker, its main ingredient, demands sustained high-temperature processing.
“If even a fraction of global construction shifts toward carbon-negative materials like ESM, the impact could be enormous,” Rahbar said, according to WPI’s announcement of the research.
Where the Material Could Be Used First
The researchers pointed to several near-term applications that match the material’s rapid curing, tunable strength, and recyclability. Possible uses include roof decks, wall panels, and modular building components.
Because ESM can be produced with low energy and renewable biological inputs, the team suggested it could also support affordable housing and climate-resilient construction. Lightweight structural parts manufactured quickly could speed rebuilding after extreme events, making it relevant for post-disaster reconstruction.
The material is also repairable. The authors said this feature could lower long-term construction costs and reduce the volume of construction waste sent to landfills.
Laboratory Promise, Not Yet a Construction Product
The study is clear that ESM has not left the laboratory. The paper states that future work must address large-scale production, long-term durability, and further improvements in mechanical properties.
The researchers provided no cost data, no manufacturing timeline, and no results from real-world structural testing. While the compressive strength exceeds the minimum for structural concrete, it remains below many conventional formulations used in load-bearing infrastructure. The team described continued development toward reinforced applications as a goal, not a current achievement.
The research team at WPI has demonstrated a working laboratory-scale process that transforms CO₂ into solid minerals using an enzyme-driven reaction. The material cures in hours rather than weeks and carries a carbon-negative footprint.
The scientific mechanism is documented. The environmental arithmetic is laid out. What remains is the engineering work of proving it can be made reliably, affordably, and at volumes that matter to a global construction industry that pours billions of tons of concrete every year.
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