Displaying items by tag: concrete

UK: Cemex will supply 40,000t of lining-sprayed concrete for the construction of the 13km central section of the Thames Tideway sewer project in Greater London. Engineering partners Ferrovial Construction and Laing O’Rourke will use the concrete for shafts and launch tunnels. The company produced the concrete at its Buxton, Derbyshire concrete plant. It says that it offers ultra-high strength, consistency and two-hour workability in line with the stringent requirements of the job. It also needs to be pumpable with a pipeline length of up to 400m. The producer will deliver up to 3000t/month of the concrete to Central London over ‘a few months.’

Europe, Middle East, Africa and Asia president Sergio Menendez said “The Thames Tideway Tunnel project is one of incredible scale which will solve serious capacity issues with London’s sewer system and have considerable benefits for the area’s wildlife and population, while also preventing pollution, creating jobs, a rejuvenated river economy and new areas of public space.” He added “This is a remarkable piece of engineering, and we’re proud to be working with world-class contractors to build this key infrastructure in the most sustainable and cost-effective way possible for one of the world’s greatest cities.”

The 25km ‘Super Sewer’ will conduct the city’s sewage to a new treatment facility at Abbey Mills in the Borough of Newham. The central section runs between 30m and 60m below the Thames past part of West London, Westminster and the City of London.

Spain: Cementos Molins has increased its stake in concrete design specialist Escofet to 76% from 37%. The company says that it hopes to retain the public architecture producer’s management team. It said that it will integrate the subsidiary under its prefabricated concrete division to combine industrial expertise with design excellence.

Chief Executive Officer Julio Rodríguez said that the company’s 2020 – 2022 strategy prioritises “both organic and inorganic growth,” seeking new acquisitions while “maintaining financial discipline and selecting projects where the return on investment is clear."

Switzerland: Holcim Switzerland has started using three full electric concrete mixer trucks. The subsidiary of LafargeHolcim is working with Designwerk, a Switzerland-based company specialising in the electric mobility sector. Designwerk has equipped a motorless basic chassis of a Volvo vehicle with electric motors for both locomotion and the mixing drum. This is intended to be sustainable and offer quiet driving, mixing and unloading. The three vehicles are expected to save around 90t/yr of CO₂.

The trucks are labeled with the Futuricum brand and are active in the St Gallen, Zurich and Basel regions. The building materials company says that electric vehicles suit concrete logistics because they cover relatively short transport routes and have a fixed starting point with a battery charging station in the Holcim concrete works. Holcim says it obtains the electricity it needs exclusively from renewable energy sources.

US: Charah Solutions has been awarded a marketing contract by Dominion Energy for the beneficiation and utilisation of up to 8.1Mt reclaimed ponded coal ash at its Chesterfield Power Station in Chester, Virginia. The contract will run from 2021 until 2032. It follows local state legislation requiring the power company to remove coal ash from sites at the Chesterfield Power Station within 15 years.

As part of the agreement, Charah Solutions will install processing and transportation infrastructure in 2021 to facilitate rail transportation of the ash from Chesterfield Power Station to cement kiln feed markets. The beneficiated ash product will replace other currently utilised virgin raw materials in the production of Portland cement at multiple cement kiln locations in the eastern US for the next decade and beyond, and help supply the growing demand for concrete in the construction industry.

UK: Cemex UK has supplied 70m³ of Vertua Classic concrete to the site of Citu’s upcoming office building in its Climate Innovation District in Leeds, West Yorkshire. It will provide the building’s foundations. The company says that it has a 30 – 50% smaller carbon footprint than a standard mix. It produced the concrete at its Leeds ready-mix plant.

Ready-mix technical manager Tracey Carden said “We are very proud to have supplied our Vertua Classic concrete to the latest phase of work at Citu’s Climate Innovation District in Leeds, particularly as this will be its head office. This is a development that prioritises sustainable construction, making our low-carbon concrete the obvious choice for the office building foundations.”

UK: Yorkshire Water is trialling a new concrete surface applicant designed to prolong the lifespan of concrete. It says that the alumina and zirconia silicate ceramic surface treatment protects concrete from wet/dry and freeze/thaw cycles, peeling, flaking, chalking and delaminating. This reduces the need for replacement of concrete structures, reducing CO₂ intensity by 43% compared to bare concrete, according to the company. Advanced materials producer Haydale supplied the product.

Senior project manager Jonathan LeMoine said “In early 2021 we will be using one of our capital partners to apply the material to a number of our chemical bunds. The results will be immediately apparent and will pave the way for a larger programme of works protecting our assets.” He added “We often invest in trialling new technologies and techniques to pave the way for lower emissions in our capital expenditure (CAPEX) and operating expenditure (OPEX) solutions. We’re excited to see the results from this trial, and hope that it will provide a low carbon alternative to demolishing and rebuilding.”

UK: The Mineral Products Association (MPA) has appointed Jeremy Greenwood as the Chair of UK Concrete. He will work with Chris Leese, the Director of UK Concrete, to coordinate the work of the Concrete Centre, MPA Cement, British Ready-mixed Concrete Association (BRMCA) and British Precast on the roadmap the sector is implementing to go ‘Beyond Net Zero by 2050.’ Greenwood previously worked for Tarmac as its managing director, having been at the company since 1988.

US: A US court has fined Argos USA US$20m for violations of antitrust rules between 2011 and 2016 with regards to the ready-mixed concrete market. The subsidiary of Columbia-based Cementos Argos subsidiary has admitted to collusion with another ready-mix producer. The US Department of Justice says that the companies coordinated price rises, submitted collusive non-competitive bids to customers, allocated markets in Southern Georgia and elsewhere and charged fuel surcharges and environmental fees.

Argos says the conspiracy was committed by, “a small number of former employees of a small, local sales office” that joined Argos when it acquired another company, according to Reuters. It added that its management “did not participate in or condone the conduct, which was undertaken in contravention of company compliance policies.”

France: Vicat started using a CO₂ntainer system supplied by UK-based Carbon8 Systems at its Montalieu-Vercieu cement plant in November 2020. It uses captured CO₂ from the unit’s flue gas emissions to carbonate cement-plant dust and produce aggregate, which can then be used to make products such as concrete. The system has particular relevance for a plant burning alternative fuels due to the additional chlorinated dust created compared to the use of conventional fossil fuels. The company says it is the first European cement producer to use the process at an industrial scale. Previously, Carbon8 Systems said that its CO₂ntainer would process and convert up to 12,000t of cement bypass dust in its first phase of operation.

Vicat Group scientific director Laury Barnes-Davin said, “We were drawn to Carbon8 Systems’ two-part technology: capturing the CO₂ that Montalieu emits, and using it to produce an aggregate that can be marketed in the construction industry. It opens up great potential for our operations not just in France but also in all the countries where we work across the globe.” The group hopes to reach a 100% alternative fuel substitution rate in France by 2024.

US: Mexico-based Cemex has launched the Vertua range of low and net-zero CO₂ concrete products in the US following introductions in Mexico and Europe. The range consists of Vertua Classic, Vertua Plus and Vertua Ultra. The company has begun by selling Vertua Classic – which it says offers a 20–30% reduction in CO₂ emissions – in Bay Area, Central Valley, Los Angeles, Sacramento and San Diego, California. Vertua Plus and Vertua Ultra products will be introduced in 2021.

California regional president Francisco Rivera said, “Since many customers are motivated to reduce the carbon footprint of their projects, we are delighted to offer Vertua Classic, which is suitable for a wide range of commercial and residential applications. Our Vertua products are uniquely designed to balance limited carbon specifications with our customers’ needs for high-quality performance and resilience.”