Third-party testing confirmed Brimstone’s Ordinary Portland Cement (OPC) meets ASTM C150 standards and performs comparably to conventional materials used in Amazon buildings.
Amazon signed a commercial agreement to reserve annual volumes of Brimstone’s OPC and supplementary cementitious materials from its future production facility.
Expanded durability and performance testing will run through 2025–2026, using larger volumes from Brimstone’s Oakland, CA plant.
Amazon and Brimstone have announced promising results from initial tests of Brimstone’s lower-carbon Ordinary Portland Cement (OPC), designed for use in concrete construction. The tests, created in collaboration with Amazon’s concrete consultants, evaluated workability, compressive strength, and other core performance metrics using Amazon slab mix designs.
The results showed that Brimstone’s OPC met ASTM C150 requirements and performed comparably to the conventional cement currently used in Amazon buildings.
“These initial results are encouraging and demonstrate the potential for Brimstone’s innovative materials to scale across our buildings portfolio and reduce the carbon footprint of concrete,” said Asad Jafry, Director of Global Energy, Sustainability & Automation at Amazon.
Following the successful trials, Amazon signed a commercial agreement to secure annual volumes of Brimstone’s OPC and supplementary cementitious materials (SCM) from the company’s upcoming facility.
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The partnership will now enter an expanded testing phase in 2025 and 2026 to evaluate durability, sulfate resistance, aggregate reactivity, and other properties across a wider range of mix designs and applications. This phase will use larger material volumes from Brimstone’s Oakland, CA plant.
“Brimstone has developed a more efficient, economical, and sustainable process for producing industry-standard materials that can be used today with standardized, known testing programs, which allows for fast market adoption,” said Cody Finke, co-founder and CEO of Brimstone. “Because Brimstone makes ASTM C150 Ordinary Portland Cement, the most widely used cement in the world, at competitive prices, our path to commercialization is well-defined with existing regulation, know-how, and material safety protocols.”
The companies emphasized that pending successful testing and commercialization, the supply agreement will support Amazon’s efforts to integrate lower-carbon cement into its construction projects at scale.
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