Displaying items by tag: concrete

Japan: A proposal by Mitsubishi Group on researching CO₂ injection into concrete has been approved for a grant from the New Energy and Industrial Technology Development Organisation (NEDO). This joint project between Mitsubishi Group, Kajima Corporation, and Chugoku Electric Power aims to improve the existing technology so that it can be applied to the reinforced and cast-in-place concretes used in building construction. At present the group said that current carbon-recycling techniques are mainly used for unreinforced concretes, such as concrete blocks.

Mitsubishi Group has already been involved in the development of concrete projects that take advantage of carbon-recycling, including a zero-emission concrete called CO₂-SUICOM. It added that carbon capture, utilisation and storage (CCUS) technologies, including carbon-recycling, are an excellent opportunity for the company to use its strengths between industries that both emit and use CO₂.

Italy: Italcementi and Calcestruzzi have supplied specialists and products, including 67,000m³ of concrete, for the Genoa-San Giorgio Bridge. The new structure has been built to replace the Morandi Bridge that collapsed in mid-2018. Products from the integrated Calusco d'Adda cement plant, the Novi Ligure grinding plant and Calcestruzzi’s concrete plants in Genoa supported the project.

UK: Breedon Group says it has completed the acquisition of selected assets from Cemex. Following instructions from the Competition and Markets Authority (CMA) the assets will be operated as Pinnacle Construction Materials, a newly-created separate business led by its own management team and operating from its own offices. Pinnacle will offer a range of heavy building materials, including aggregates, asphalt, ready-mixed concrete, concrete products and cement, together with contracting services, from approximately 100 locations in England, Wales and Scotland.

The CMA is still investigating the acquisition and plans to announce its initial conclusions in late August 2020. Breedon Group expects to integrate Pinnacle into its UK business at a later date once this process is fully completed. Cemex agreed to sell Breedon Group some of its UK assets in January 2020. This included 49 ready-mix plants, 28 aggregate quarries and a cement terminal for Euro211m.

US: Switzerland-based LafargeHolcim has announced the start of sales via its local subsidiaries of its ECOPact range of 30 - 100% reduced CO₂ concretes. Chief executive officer (CEO) Jan Jenisch said, “I am proud to introduce ECOPact, the industry’s broadest range of green concrete for high-performing, sustainable and circular construction.”

The company says that, where regulatory conditions allow, ECOPact products integrate upcycled construction and demolition materials, further closing the resource loop. ECOPact concretes will enter the Canadian, Latin American and UK markets in mid-late 2020. “With the roll-out of this Green Concrete, we are accelerating the transition to more sustainable building materials for greener construction,” added Jenisch.

Mexico: Cement has announced the launch of a range of carbon neutral concretes called Vertua. By offsetting, Cemex has eliminated Vertua’s remaining carbon footprint following a 70% reduction in embodied emissions compared to Ordinary Portland Cement (OPC) through use of a geopolymer cement mixture. The concretes will become available on different markets globally in 2020 and 2021.

Mexico: Cemex says that it is involved in a working group “focussed on the application of FastCarb aggregates to concrete production” as part of its efforts towards net-zero CO₂ concrete production. FastCarb, administrated by the US-based International Research and Exchanges Board, is a project aimed at the production of aggregates from recycled concrete containing trapped carbon dioxide (CO₂) requisitioned from industrial exhaust streams.

Cemex said, “After completing the first phase of the experimental approach at the laboratory level with promising preliminary results, the project is now entering the second phase seeking to tackle the industrial approach. In this industrial approach phase, Cemex was recently assigned to evaluate the physical and mechanical properties of the carbonated recycled concrete aggregates when used in ready-mix concrete in the laboratory facilities at the Cemex France National Technical Centre.”

Pakistan: The upcoming Diamer Basha Dam and 21MW Tangir Hydropower Project will use concrete made from Ordinary Portland Cement mixed with fly ash and other additives. The Frontier Works Organisation said, “This reduces thermal loads on the dam and reduces chances of thermal cracking,” according to China Daily News. The Chinese-backed project is scheduled for completion in 2028.

Germany: HeidelbergCement has reported the successful resurfacing of a section of Federal Motorway 5 (BAB 5) between Karlsruhe and Frankfurt using a concrete made from low-alkali cement produced at its 1.4Mt/yr-capacity Schelklingen, Baden-Württemberg integrated cement plant. The company used over 3600t of cement to produce the 12,000m³ of concrete required for the 3.2km stretch of road. Traffic infrastructure product manager Klaus Felsch said, “The cement’s low alkali content significantly reduces the risk of an alkali-silica reaction and maximizes the durability of the concrete.”

Nepal: Ashden Environment and the United Nations Science, Technology and Innovation Forum have awarded Build Up Nepal their respective highest awards for its low-cement disaster-resistant concrete blocks. The Nepal Time newspaper has reported that the blocks contain a mix of 10% cement, 40% clay and 50% sand, all sourced from near Build Up Nepal’s Mitra Marg, Patang plant. The company has supplied its unique building materials to projects in 300 different communities, including the construction of 4500 homes. It says that the blocks, reinforced with iron rods, have a greater earthquake resistance than concrete.

Build Up Nepal said, “Interlocking brick is a highly suitable construction technology in Nepal, reducing the cost of construction as well as the carbon footprint of building a house. With this technology Nepal's houses can be stronger, more affordable and its air cleaner.”

Colombia: Cementos Argos Colombia has reported on its situation and shared its business outlook as it returns to full operations post-coronavirus lockdown. The company says that 1700 people are currently active in operations, with 910 working from home and 660 on furlough. In May 2020 it served 5300 customers, down by 74% year-on-year from 7210 in May 2019. Cement volumes fell by 41% and concrete volumes by 43%. 44 of Cementos Argos Colombia’s 58 concrete plants were operational, and 73 of its 92 work centres.

During the lockdown period the company completed over 100 new infrastructure project supply contracts. Cementos Argos Colombia regional vice president Tomás Restrepo said, “We are confident in a positive future, in our resilience, in the ability to face challenges and that we have extraordinary talent who are aware of the importance of self-care and who work every day on good ideas to continue to be the best allies of our client.”