Peer-Reviewed Study Validates Potential Economic and Energy Efficiency Advantages of Brimstone's Cement Process
- May 14
- 3 min read
Researchers from industry, academia, and government labs found that a silicate-based OPC process like Brimstone’s could reduce costs and energy compared to conventional producers and alternative cements
OAKLAND, Calif. — May, 14, 2026 — Brimstone today announced the publication of a peer-reviewed academic paper validating the fundamental economic and energy-efficiency advantages of producing ordinary Portland cement (OPC) from silicate rocks rather than limestone. The article—“Silicate-derived calcium as a pathway to low-carbon Portland cement,” published in Communications Sustainability, a journal from the publishers of Nature—concludes that producing cement from silicate rocks could improve energy and material efficiency while lowering costs and avoiding the emissions associated with limestone calcination. The paper also addresses the economic barriers facing alternative cement, most notably due to the high, risk-adjusted costs of novel construction materials.
The study found that silicate rocks, an abundant resource in the United States and globally, could provide a lower-energy pathway for producing OPC and avoid the limestone calcination emissions from conventional cement manufacturing. The analysis examined chemistry, thermodynamics, feed rock availability, and material flows to conclude that a silicate-based cement production process could improve overall energy and material efficiency relative to conventional methods. The paper specifically found that co-producing OPC and supplementary cementitious materials (SCM) could reduce total energy required by approximately 30% relative to conventional production pathways. (Brimstone’s first-generation Rock Refinery® process will co-produce OPC and SCM with a third product, smelter grade alumina.)
The paper also examined the economic headwinds facing alternative cements. Even if manufacturing costs were zero, novel cement chemistries would still face higher risk-adjusted costs due to permitting requirements, performance uncertainty, and long-term reliability concerns. Addressing these risks requires long-term testing in buildings. By contrast, the paper found that producing OPC from silicates could reduce energy use and emissions while preserving the underlying chemistry, standards, infrastructure, and construction practices practiced globally. The study also discussed another possible benefit of using silicate rocks to produce cement already incorporated in Brimstone’s approach: they can support co-generation and refining with other industrial materials, such as alumina, SCM, and steel.
“This study reflects the kind of rigorous pressure-testing that all new industrial processes should undergo,” said Cody Finke, Ph.D., CEO and co-founder of Brimstone. “The findings help explain the challenging outlook for novel cement chemistries and reinforce our conviction that producing Portland cement from silicate rocks offers structural advantages in energy use, adoption, and overall economics. More fundamentally, the paper shows that, like any successful industrial process, Brimstone’s edge comes from embracing first principles, not fighting against them.”
“The central question behind our paper was simple: could silicate rocks offer a better way to make cement?” said Jeff P. Prancevic, Ph.D., the paper’s lead author and a researcher at UC Santa Barbara. “Our analysis suggests that the answer is ‘yes.’ We specifically found that the thermodynamics and material balances associated with manufacturing ordinary Portland cement and supplementary cementitious materials from common silicate rocks like basalt could outperform conventional cement production using limestone in terms of energy efficiency, carbon emissions, and overall economics.”
The paper’s coauthors span academia, industry, and the national laboratories. Lead author Jeff P. Prancevic, Ph.D., a former scientist at Brimstone, is a research geologist at UC Santa Barbara. Additional coauthors include Eric Peterson of Webcor Concrete Group; Andres F. Clarens, Ph.D., professor of civil and environmental engineering at the University of Virginia; Tatiana Pyatina,
Ph.D., a researcher at Brookhaven National Laboratory; and Brimstone-affiliated authors Cody Finke, Ph.D., the company’s CEO, and Wilson Nguyen, Ph.D.
The study underscores some of the fundamental advantages of Brimstone’s Rock Refinery® model, which co-produces cement, SCM, alumina, and, ultimately, other critical materials and steel from calcium silicate rocks. The company is currently advancing development of its first commercial-scale facility.
Paper Information
Title: “Silicate-derived calcium as a pathway to low-carbon Portland cement”
Journal: Communications Sustainability
DOI: 10.1038/s44458-026-00056-4
