Brimestone has confirmed the details around a successful lower-carbon cement test with American E-commerce company Amazon.
The test assessed Brimstone’s lower-carbon Ordinary Portland Cement (OPC) for use in construction. The tests were designed in conjunction with Amazon’s concrete consultants to evaluate the workability, compressive strength, and other key properties.
While further testing is expected to take place throughout this year and 2026, however, the initial test has already drawn positive results. According to Brimestone’s latest release, Amazon has signed a commercial agreement to reserve annual volumes of Brimstone’s OPC and supplementary cementitious materials (SCM).
“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,” Amazon director of global energy, sustainability and automation Asad Jafry said.
The initial test confirmed Brimstone’s OPC performed in accordance with ASTM C150 requirements and worked comparably well with the conventional materials currently used in Amazon buildings.
The two companies will build on these results with further testing. The next phase will evaluate durability, sulfate resistance, aggregate reactivity potential, and other key properties. The next phase will also use larger volumes of the material produced at Brimstone’s facility in Oakland, CA.
“Brimstone has developed a more efficient, economical, and sustainable process for producing industry-standard materials that can be used today with standardised, known testing programs, which allows for fast market adoption,” Brimstone chief executive officer and co-founder Cody Finke said.
“Our collaboration with Amazon proves that point. Because Brimstone makes ASTM C150 Ordinary Portland Cement, the most widely used cement in the world, at competitive prices, our path to commercialisation is well-defined with existing regulation, know-how, and material safety protocols.”
