Displaying items by tag: concrete

India: Construction is underway on a section of National Highway 66 in Maharashtra which is being built of concrete made from ground granulated blast furnace slag (GGBFS) and slag cement. India Today News has reported that the Central Road Research Institute developed the technology, in partnership with the National Institute for Transforming India Aayog and the Council of Scientific and Industrial Research.

UK: Teesside University is working with a number of partners, including Material Evolution, on developing a new type of concrete using steel slag. The ‘Mevocrete’ project has a total budget of Euro8.6m and it received around Euro3.5m funding from the Innovate UK scheme. It intends to build a full scale on-site unit for cement production using waste steel slag at the Teesworks industrial zone. Researchers from the university’s School of Computing, Engineering & Digital Technologies will analyse the steel slag and its chemical composition and measure how efficient it is at sequestering carbon. The projects aims to manufacture a concrete that emits up to 85% less CO₂ compared to a traditional concrete made from Ordinary Portland Cement (OPC).

Material Evolution is the lead industrial partner on the project. Other partners include Celsa Manufacturing UK, LKAB Minerals, Nanomox, Enursan, Retaining UK, Geocast, Playfair Capital and ZTL Contracting.

India: Finland-based Betolar has launched its first concrete products manufactured using Geoprime on the Indian market. Geoprime is an additive designed for use in cement-free concrete production with ash and ground granulated blast furnace slag (GGBFS). The new concrete product range consists of precast blocks, paving slabs and tiles, and is currently on display at World of Concrete India in Mumbai, Maharashtra.

Betolar's India managing director Abhishek Bhattacharya said "We are happy to introduce our first products to our customers for the Indian markets. We have now moved from laboratory tests into the production phase, and can show concretely how well this solution works. It is great to hear the feedback from the concrete industry in the region to our sustainable solution. Decarbonisation of the concrete industry is a very current and important topic."

Ireland: Ecocem has launched Superfine, a ground granulated blast furnace slag (GGBS) for use in specialist applications in the European market. The product is a GGBS that has been ground to a very fine particle size. It is intended to be added to other products to improve their strengths in applications such as high performance and ultra-high-performance concrete (UHPC). It can also be used to improve the finish of concrete and reduce the amount of pigment required.

Superfine will be launched across Europe, with the product already being trialled in Abu Dhabi and specified in projects across Ireland. It is designed to be used as a specialist additive in binders, industrial mortars, ultra-high performance concrete (UHPC) and precast concrete.

Susan McGarry, the managing director of Ecocem Ireland, said “After extensive time in research and development, launching Superfine onto the Irish market is testament to our global range of innovative and sustainable concrete solutions.”

Vietnam: Trung Hieu Development Corporation has secured a five-year contract to use Betolar’s alkali-activated slag and fly ash-based concrete additive Geoprime. Trung Hieu Development Corporation plans to source the materials for Geoprime from local industrial side streams. Dow Jones Institutional News has reported that the move will eliminate 80% of raw materials CO₂ emissions across its 120,000t/yr-worth precast concrete production capacity.

Betolar's Head of Asia Juha Pinomaa said "Vietnam is the world's third largest cement producer and fourth largest cement consumer, with 85Mt/yr. We estimate that the Vietnamese market represents significant commercial potential for us in the coming years due to the huge potential for cement replacement.” He concluded “We can promote the local circular economy and accelerate Vietnam's sustainable development efforts by directly offering cement-free alternatives. The Vietnamese steel and energy industry generates large amounts of steel slag and fly ash as side streams, which can be used for Geoprime-based concrete."

UK: A team of researchers from six UK universities has filed a patent for a clinkerless cement product called Cambridge Electric Cement. Local press has reported that the project, called UK Fires, saw researchers successfully produce the cement using renewable power from recycled cement powder and ground granulated blast furnace slag (GGBFS). Following its successes, UK Fires has obtained a further Euro2m in funding from the UK Engineering and Physical Sciences Research Council (EPSRC) to continue its work into the range of concrete wastes suitable for use in Cambridge Electric Cement production.

US: The Slag Cement Association (SCA) has announced the recipients of its 2021 Slag Cement in Sustainable Concrete Awards program. Thirteen construction projects were chosen to showcase the broad applications of slag cement and its impact on creating more durable and sustainable concrete. The infrastructure winners included projects with slag cement supplied by companies including Argos USA, Cemex, Lehigh Hanson, Ozinga, Skyway and St Mary’s Cement. These projects included work on roads, bridges, residential construction, a concert venue, a sport stadium, airports, a theme park and a hydroelectric dam. Two research projects on slag cement from Cleveland State University and Florida State University were also recognised.

Finland: Betolar has signed a letter of intent with Australia-based RISAB and the Vanadium Recovery Project to research the use of slag ‘purified from vanadium’ in concrete production. Dow Jones Institutional News has reported that the company says that, through it Geoprime alkali-activated additive technology, the new slag source could replace 10% of the cement used in concrete production in Finland.

CEO Matti Löppönen said "We see a huge opportunity for Betolar here. If successful, we would be able to offer our customers a specific, currently unused slag of the steel industry to replace cement in concrete. Our customers already have experience in utilising other types of slag in the production of concrete using Geoprime. Utilising new side streams will expand the reach of our solution as planned.”

Betolar launched Geoprime in September 2021. It is currently developing a recipe-optimising artificial intelligence (AI) and data platform to bring together concrete producers and alternative raw material suppliers.

UK: Tarmac has demonstrated a new concrete product using a high proportion of slag with Align, the joint venture building part of HS2, a new high-speed railway line. It demonstrated the potential to use very high ground granulated blast furnace slag (GGBS) content in excess of 90%, as an alkali activated cementitious material conforming to BS EN197, the standard for cementitious materials allowed to be used in ready mixed concrete, to significantly reduce carbon emissions, whilst still producing a quality finish and allowing normal construction and demoulding times.

Demonstration and testing at full scale used one of three Tarmac concrete batch plants at a Chalfont Lane construction site in Hertfordshire. A structural slab forming part of the new viaduct pre-cast factory and a vertical wall were poured. Tarmac says that the mixes, designed to Align concrete specification, exceeded expectations in both fresh and hardened properties, and showed that the new concrete can be produced in normal concrete plants and placed via mixer truck and by skip with a tremie pipe. The new low carbon concrete has a carbon footprint following industry BSI PAS2050 calculation rules that gives a 62% reduction in CO₂e per cubic metre of concrete, compared to a standard CEM I concrete, meeting the same specification in the same raw materials. The footprint covers all aspects of the concrete production and supply with no carbon off-setting applied, delivering an actual footprint of 133kg/m³ CO₂e. This represents a saving of 220t CO₂e for every 1000m³ produced.

“Together we’ve shown this new concrete is fit for purpose in slabs and walls, with good repeatability and works with standard production and construction methods. This product is a great step along the industry zero carbon routemap, and the demonstration will help accelerate adoption of this new concrete,” said Robert Gossling, head of commercial engineering solutions at Tarmac.

Tarmac is supplying concrete for the construction of the Central 1 section of HS2 Phase One that is being built by Align. This includes a 22km section of high-speed rail infrastructure incorporating a 3km viaduct across the Colne Valley, a 16km twin-bored tunnel, and five vent shafts handling both intervention and tunnel ventilation facilities.

UK: Ecocem and construction company Taylor Woodrow have conducted the first pour of the Exegy ultra-low CO₂ concrete at waste management site in London. The mix used on the project is reported to reduce the carbon footprint by up to 70% when compared to traditional concrete. Cemex also collaborated on the project by producing the concrete used for the pour.

The concrete product was developed by Ecocem and Vinci Construction, using Ecocem Ultra, as part of Vinci Construction’s ultra-low carbon concrete range. Ireland-based Ecocem is a producer of cement and additives made using ground granulated blast furnace slag (GGBFS). Exegy is already being used at a pilot site of the Grand Paris Express and in the construction of the Athletes’ Village in Paris for the 2024 Summer Olympic Games.

Micheál McKittrick, managing director, Northern Europe, Ecocem, said, “Our Ecocem Ultra technology is already being used at scale in France, and we’re excited to now see it being adopted in the UK.” He added, “The cement and construction industries are developing and deploying a range of emission reduction technologies to help the UK Government reduce emissions by 78% by 2035, and reach net zero by 2050, and Ecocem will add a further dimension to these efforts.”