Displaying items by tag: supplementary cementitious materials

US: Solidia Technologies has commenced production of its mineralised CO₂-based supplementary cementitious material (SCM) at a pilot line at its headquarters in San Antonio, Texas. The pilot line increases the company’s production capacity of the SCM by a factor of 25.

Solidia Technologies senior director of strategy and business development Pradeep Ghosh said "With the dramatic increase in production capacity that the new pilot line brings, we are now shipping significant quantities of Solidia SCM to ready-mix concrete producers, transport agencies and contractors to qualify and trial our material."

Australia: Alternative cement and concrete producers have welcomed a new Australian civil engineering standard that allows builders to use reduced-CO₂ geopolymer concrete in infrastructure projects. Wagners, which produces Earth Friendly Concrete (EFC), said that the revision has removed one if its key barriers to wider market acceptance. EFC replaces 100% of cement with supplementary cementitious materials, including ground granulated blast furnace slag (GGBFS) and pulverised fly ash, by virtue of its binder technology. Wagners previously supplied EFC for the London Power Tunnels project in the UK, based on local technical approval-based building codes. The producer now expects a new standard like the Australian one to follow in the EU.

World: The Global Cement and Concrete Association (GCCA) has named the 15 anticipated deliverers of low-CO₂ cement and concrete production shortlisted for participation in its second Innovandi Open Challenge. The association chose the start-ups based on their potential to deliver CO₂ emissions reduction in the global cement and concrete sector in line with its Concrete Future 2050 Net Zero Roadmap. The applicants are presenting their pitches to GCCA members on 30 June 2023. All those accepted will gain access to members' plants, labs, networks and expertise. The following start-ups made the Innovandi Open Challenge 2023 shortlist:

GCCA cement director and innovation lead Claude Loréa said “We received more than 70 quality applications, so drawing up a shortlist was challenging." Loréa continued "Our essential industry needs something easily scalable and affordable. Those start-ups on the list demonstrated the most potential, and we look forward to hearing more about their ideas. But we’ll also be keeping in touch with other start-ups who didn’t make this year’s shortlist, with future projects in mind.”

US: Eco Material Technologies has supplied its PozzoCEM Vite clinker-free cement to 3D printing construction firm Hive 3D for its The Casitas @ The Halles project in Texas. PozzoCEM Vite cement has 92% lower CO₂ emissions than ordinary Portland cement (OPC). The producer said that concrete produced using PozzoCEM Vite is also more durable and longer lasting than OPC-based concrete. Eco Material Technologies and Hive 3D developed a custom batching system to mix PozzoCEM Vite cement and local Texan sand for use in the project. Eco Material Technologies said that the system created a significant cost reduction compared with other available printable mortar technologies.

Eco Material Technologies recently launched a new 99% reduced CO₂ PozzoCEM formulation, which it expects to use in future projects with Hive 3D. Other reduced-CO₂ cements produced by Eco Material Technologies include its PozzoSlag 50% ground granulated blast furnace slag cement. In total, Eco Material Technologies has supplied 1Mt of reduced-CO₂ cements across 4000 construction sites since 2012. It said that it expects to announce multiple new infrastructure projects and strategic partnerships later in 2023.

Eco Material Technologies' CEO Grant Quasha said “Hive 3D’s commitment to building the first 100% cement replacement 3D printed homes aligns with our goal of transitioning the construction industry away from using materials that generate approximately 8% of the world’s carbon emissions each year."

Finland: Betolar has signed a cooperation agreement with concrete producer Consolis Parma to develop reduced-CO₂ hollow concrete slabs. The development process will implement Betolar's Geoprime binder into Consolis Parma's concrete production. Consolis Parma is committed to halving its CO₂ emissions between 2021 and 2035.

Consolis Parma's Technology Director Juha Rämö said “The use of alternative new binder combinations and additives that ensure the efficiency of the manufacturing process are key factors in achieving our climate goals. We are actively seeking new channels to address these challenges. The cooperation with Betolar is an important new partnership for us."

Namibia: Ohorongo Cement Namibia has supplied 3000m³ of cement to the site of NamPower's upcoming Sekelduin power plant in Swakopmund. Ohorongo Cement used 730t of its CEMIR cement, which contains 30% fly ash, combined with an additional 30% fly ash in the concrete mixer. The producer said that the extra ash increases the finished product's density, reducing permeability.

Ohorongo Cement said that the project is 'near completion,' having begun in mid-2021.