Displaying items by tag: concrete

Lithuania: Scientists at Kaunas University of Technology (KTU) have developed methods to convert discarded textiles into alternative fuels and cement additives to reduce waste. Efforts focus on reducing the clinker content of cement and CO₂ output.

Dr Raimonda Kubiliute of the KTU Faculty of Chemical Technology said “The cement industry, especially clinker firing processes in rotary kilns, contributes significantly to environmental pollution. This is why researchers are actively seeking ways to reduce the amount of conventional cement in cement-based mixtures by replacing it with alternative binders or fillers.”

KTU found that polyester fibre from waste textiles, when added to concrete at 1.5%, increases compressive strength by 15-20% and improves freeze-thaw resistance. Ash from thermal treatment of textiles at 300°C in an inert atmosphere can replace up to 7.5% of ordinary Portland cement and increase strength by up to 16% under curing conditions. The findings are part of the ‘Production of Alternative Fuel from Textile Waste in Energy-Intensive Industries (Textifuel)’ project between KTU and the Lithuanian Energy Institute.

Dr Kubiliute said “This technological solution not only reduces CO₂ emissions during cement production but also provides an innovative and environmentally friendly approach to textile waste management.”

US: Vulcan Materials has appointed Ronnie Pruitt as its CEO with effect from the start of 2026. Tom Hill, the company’s current CEO and chair, will become its executive chair.

Pruitt holds over three decades of experience in the building materials sector. He has worked as Vulcan’s Chief Operating Officer since mid-2023. Prior to this, he was Senior Vice President for Vulcan's Southwest and Western Divisions. He joined Vulcan in 2021 with the acquisition of US Concrete, where he worked as CEO. He has also worked for Martin Marietta Materials and TXI.

Vulcan Materials produces construction aggregates and materials including asphalt and ready-mixed concrete. Its headquarters are in Birmingham, Alabama.

France: Heidelberg Materials has launched a new range of its Socli lime product that contains hemp. The product is available in two binder and two coating formulations that combine natural hydraulic lime and plant fibres. Formulated for hempcrete bio-based concrete applications, on vertical walls or for insulating intermediate floors, its high lime content increases durability, according to the producer.

Heidelberg Materials says that the Socli lime range is especially suited to the restoration of historic buildings, as it guarantees breathable walls and healthy indoor air, and prevents mould, while providing thermal and acoustic insulation. The absence of cement further increases hygrometric regulation and thermal insulation.

US/Canada: Martin Marietta Materials signed a definitive agreement with Quikrete Holdings to exchange its Midlothian cement plant, related terminals and North Texas ready-mixed concrete assets for aggregates operations with a capacity of 20Mt/yr in Virginia, Missouri, Kansas and Vancouver, and US$450m in cash. The transaction is expected to close in the first quarter of 2026, subject to regulatory approvals.

Chair and CEO of Martin Marietta Ward Nye said “Following a thorough evaluation, we believe that exchanging our remaining cement plant and related ready-mixed concrete operations for core aggregates assets and pursuing accretive bolt-on acquisitions best positions the company for long-term earnings growth.”

US: Amazon and Brimstone have announced successful third-party test results for Brimstone’s lower-CO₂ ordinary Portland cement (OPC), which meets ASTM C150 requirements using Amazon slab mix designs. The companies will continue testing through 2025 and 2026. On the basis of the successful tests, Amazon has signed a commercial agreement to reserve annual volumes of OPC and supplementary cementitious materials from Brimstone’s upcoming plant in Oakland, California.

UK: Material Evolution has partnered with CRH subsidiary Tarmac to launch a pilot project to test applications of its heat-free, 85% reduced-CO₂ cement, MevoCem. The partners aim to demonstrate the suitability of MevoCem cement for use in concrete production in line with the prospective BSI Flex 350 performance-based standard.

Material Evolution’s CEO Liz Gilligan welcomed Tarmac as an ‘early adopter’ of MevoCem cement. In a post to LinkedIn, she said “We have been quietly building something game-changing with CRH and their team at Tarmac. It is bold, it is industrial scale and it is all about cutting carbon where it counts. We are only just getting started.”

Material Evolution currently operates a 120,000t/yr Mevocem plant in Wrexham, Wales.

Canada: Concrete carbon capture technology producer CarbonCure Technologies has appointed Kristal Kaye as Interim CEO. Kaye previously served as the company’s Chief Financial Officer and, in that capacity, has already been deeply engaged with CarbonCure’s team, strategy and day-to-day operations. Her appointment comes as CarbonCure’s founder, Robert Niven, steps away from the CEO role. Niven will remain a strong supporter of CarbonCure, continuing to serve on the company’s Board of Directors.

Under Niven’s leadership, CarbonCure developed and commercialised the most widely-deployed carbon utilisation solution for lower-carbon concrete manufacturing. Over the past decade, CarbonCure has licensed hundreds of its CO2 injection systems to concrete producers across more than 20 countries, permanently mineralising and reducing nearly 0.6Mt of CO₂.

“Everyone at CarbonCure feels deep gratitude to Rob for his pioneering carbon utilisation innovation for lower carbon concrete and his tireless dedication to CarbonCure over the past 13 years, with many years of research and development before that,” said Kaye. “Stepping into this interim role, I am eager to carry Rob’s legacy forward, and our entire team remains committed to that mission, our core values and the success of our concrete producer partners around the world.”

Europe: Heidelberg Materials and environment consultancy Arup have signed a memorandum of understanding (MoU) to collaborate on decarbonisation of the built environment through carbon capture and storage-enabled cement and concrete.

The partners will conduct joint research and technical analysis on the deployment of CCS technologies across cement and concrete production. Heidelberg Materials and Arup previously began collaborating in November 2024 to assess the benefits and feasibility of carbon-captured cement and concrete.

Global: The Global Cement and Concrete Association (GCCA) has launched the Low Carbon Ratings (LCR) system for cement and concrete, a new global rating based on products' carbon footprints. The system uses a clear AA to G scale to help customers prioritise sustainability in material selection across construction sectors worldwide.

The GCCA says that the LCR system is designed to be easily recognisable, with a simple visual graphic that indicates a product’s rating and provides consistency and comparability to other products. Countries will be able to adapt the system according to local standards.

Sweden: Cemvision and S:t Eriks have entered into a partnership agreement as a result of several pilot projects using Cemvision’s cement in S:t Eriks’ production. The partners have signed a letter of intent to develop and implement sustainable concrete solutions within water and sewage infrastructure. Having already tested Cemvision’s cement in its own production, S:t Eriks will then implement the cement in commercial projects. The product reportedly offers high resistance to sulphate and acid attacks, which contribute to longer service life.

In the coming months, Cemvision and S:t Eriks will continue testing to explore the potential for broader implementation of the cement in water and sewage systems.