Displaying items by tag: US

US: Holcim US has inaugurated a 1300 – 1500Mwh/yr solar power plant at its Fort Totten ready-mix concrete plant in Washington DC. Resources News has reported that the solar power plant consists of both silo rooftop modules and carport-mounted modules. Madison Energy Investments will operate the solar power plant, and solar power engineering companies Centennial Generating Company and Halo were also partners for the project. Holcim US is committed to powering 100% of its operations renewably by 2030. It expects to reach 40% by the end of 2023.

US: The Department of Energy has awarded cement-free concrete developer C-Crete Technologies US$950,000-worth of research funding. The company will put the funds towards developing its concrete using new feedstocks.

Resources News has reported that C-Crete Technologies’ president Rouzbeh Savary said "By enlarging our technology toolbox to utilise geographically versatile and abundant feedstocks, we can ensure that local materials can be converted to cementitious binders, eliminating the need for shipping such materials over long distances.”

US: Carbon Built’s proprietary technology for the production of reduced-CO₂ concrete blocks won awards across three categories at the Fast Company Innovation by Design Awards 2023. The product won the Circular Design, Materials and Sustainability prizes. Carbon Built’s technology enables existing concrete block plants to use common alternative raw materials to produce blocks with 70 – 100% lower CO₂ emissions than ordinary Portland cement-based blocks.

US: Block-Lite plans to install a system to cure concrete blocks using direct air capture (DAC)-sourced CO₂ at its Flagstaff, Arizona, concrete block plant. The upgrade will implement CarbonBuilt’s low-CO₂ concrete production technology and AirCapture’s modular DAC technology, across five or six capture units. Direct air capture will thus remove 500 – 600t/yr of CO₂ from the atmosphere, while process changes will reduce CO₂ emissions from the Flagstaff plant by over 2000t/yr. The project has attracted fundraising from the 4 Corners Carbon Coalition (4CCC), with a goal of US$50,000. The Arizon Daily Sun newspaper has reported that Block-Lite plans to supply its first shipment of low-CO₂ blocks to a 50-home development by Habitat for Humanity in Flagstaff.

US: Prometheus Materials' microalgae biocement-based bioconcrete has demonstrated 12 times greater sound absorption than concrete produced using ordinary Portland cement (OPC). Prometheus Materials' bioconcrete contains its biocement, which is produced at ambient temperature, without process CO₂ emissions.

US: Geopolymer cement and concrete producer Renca has supplied its geopolymer 3D printing mortar for the construction of a house in the Western US. The product contains no cement, lime or gypsum due to the non-hydraulic binding properties of the mortar. It contains industrial by-products and has a faster setting time than mortar produced with ordinary Portland cement (OPC), as well as 90% lower CO₂ emissions.

Renca said that its geopolymer mortar performed well despite the desert setting of the project, with dramatic changes in temperature. It added, "Even though geopolymer mortars require a specific approach towards the mixing procedure and, unlike cementitious-based products, need to be mixed in a batch mixing system, this milestone opens new horizons. Renca's current research and development seeks to develop a one-component geopolymer mortar for continuous mixers, as well as a 2K system where you can control the setting time right at the nozzle."

US: C-Crete Technologies supplied its binder for a pour of 60t of cement-free concrete at a construction site in Seattle, Washington. CNNW News has reported that the binder replaces cement, eliminating 1t of CO₂ emissions per tonne of concrete.

C-Crete Technologies president Rouzbeh Savary said "We are thrilled to introduce our cement-free concrete, a game-changer in sustainable construction.” He added “Given that our product meets industry standards and has cost-parity with conventional concrete, it opens up an entirely new era in construction."

North America: The Global Cement and Concrete Association (GCCA) has partnered with consultancy WAP Sustainability to launch an on-demand environmental product declaration (EPD) service for concrete products. The partners say that their EPDs will allow concrete producers to show the impacts of their products across metrics including CO₂ emissions. This is in line with current market trends, including increasing Buy Clean initiatives in federal and state procurement under the Inflation Reduction Act.

GCCA's concrete and sustainable construction director Andrew Minson said “The cement and concrete sector is playing a key part in sustainable construction, but this requires transparent, objective and accessible data on the environmental impact of our products. Our collaboration with WAP will allow concrete producers to quickly and cost effectively produce EPDs that can demonstrate the contribution of their products to a sustainable world of tomorrow.”

WAP Sustainability’s EPD director James Salazar said “WAP’s partnership with the GCCA leverages the GCCA’s industry-leading computation engine with WAP’s easy-to-use software and full-service support. As requirements for EPDs grow, we’re excited to offer credible and low-cost solutions through close partnerships with industry leaders like the GCCA.”

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."

US: Holcim US has begun selling ECOPact reduced-CO₂ concrete in the Colorado Springs, Denver and Pueblo markets in Colorado. The producer says that the range offers 30 - 90% lower CO₂ emissions than concrete produced using ordinary Portland cement (OPC). Colorado aims to achieve CO₂ emissions reductions of 50% by 2030 and 90% by 2050.

Holcim US' Mountain regional general manager and senior vice president Kevin Peart said "Sustainable construction is essential to building a net-zero future in Colorado and across the nation. Denver has consistently ranked as one of the fastest-growing areas in the nation, and Colorado Springs is projected to become the state's largest city within the next 15 years. Low-carbon, high-performance building solutions such as ECOPact are essential to mitigating climate change and creating a more sustainable, resilient urban landscape."