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Displaying items by tag: concrete
Lafarge Canada completes first phase ECOCycle Technology pilot at St. Constant cement plant
14 August 2023Canada: Lafarge Canada says that it successfully integrated 10,000t of recycled concrete waste in cement production at its St. Constant cement plant in Quebec using its ECOCycle Technology process. The year-long production trial constituted the first phase of Lafarge Canada’s pilot of ECOCycle Technology. The producer says that the achievement solidifies its leading position in North American circular construction innovation. Waste360 News has reported that concrete constitutes 4Mt (40%) of Canada’s 10Mt annual generation of construction and demolition waste.
President and CEO David Redfern said “By reusing construction and demolition wastes in the production of new building materials, we are reducing waste sent to landfill. Across Lafarge Canada, we’re evaluating any opportunity to decarbonise our operations, and circularity is part of this effort. This pilot is critical to demonstrate that we can effectively repurpose concrete waste, which goes a long way to conserve our naturally occurring resources and loops in construction sustainability - building new from old.”
Australia: Alternative cement and concrete producers have welcomed a new Australian civil engineering standard that allows builders to use reduced-CO2 geopolymer concrete in infrastructure projects. Wagners, which produces Earth Friendly Concrete (EFC), said that the revision has removed on if its key barriers to wider market acceptance. EFC replaces 100% of cement with supplementary cementitious materials, including ground granulated blast furnace slag (GGBFS) and pulverised fly ash, by virtue of its binder technology. Wagners previously supplied EFC for the London Power Tunnels project in the UK, based on local technical approval-based building codes. The producer now expects a new standard like the Australian one to follow in the EU.
Neocrete plans first Neocrete activator plant
24 July 2023New Zealand: Neocrete has launched an investment round to raise over US$1.86m in funding. The start-up will use the funds to build an industrial-scale plant for its Neocrete activator for pozzolan-based concrete. The use of Neocrete's activator can eliminate up to 50% of cement in concrete. Neocrete aims to ultimately displace 100% of concrete's cement content. The Hawke's Bay Today newspaper has reported that pozzolan-based concrete made using Neocrete's additive offers resilience benefits compared to conventional ordinary Portland cement (OPC)-based concrete. It is especially suited construction in seawater-exposed settings.
Peru: Cementos Pacasmayo's consolidated sales declined by 12% year-on-year in the first half of 2023. The company recorded a general decline in its cement and concrete volumes of 18%. It said that its earnings before interest, taxation, depreciation and amortisation (EBITDA) fell by 5.9% to US$64.8m.
China: China National Building Material expects its net profit to drop by 80% year-on-year during the first half of 2023. AAStocks Financial News has reported that the group partly attributed the anticipated drop to a fall in its cement prices, as well as its commercial concrete prices.
France: Heidelberg Materials has announced plans for its CIRCO₂BETON concrete recycling project. It intends to build an industrial-scale selective separation unit at its Achères quarry near Paris. Here it will recycle demolished concrete by crushing it and separating it into its components: sand, aggregates, and recycled concrete paste (RCP). The recycled sand and aggregates will be reincorporated into new concrete.
The RCP will be transported to the Ranville cement plant in the Normandy region. There, a reactor for enforced carbonation will be installed to carbonate the RCP by exposing it to CO₂-containing exhaust gases from the kiln. The carbonated RCP acts as a carbon sink and will replace clinker in new low-carbon cement types. The project has the potential to reduce the CO₂ emissions of the Ranville cement plant by 20%.
CIRCO₂BETON is supported by the ‘Investment for the Future’ Program coordinated by the Ecological Transition Agency (ADEME). In addition, the Île-de-France region supports the selective separation plant at Achères through its zero-waste and circular economy plan. Subject to the funding, construction of both industrial pilots is scheduled to start in 2024 with production of RCP starting in 2025. The carbonation reactor is planned to be operational by 2026.
Nicola Kimm, the chief sustainability officer at Heidelberg Materials, said ”We are investing in a pioneering large-scale project based on innovative process technologies. Selective separation and CO₂ mineralisation are important levers to reduce the carbon footprint of our products. By closing the materials loop, we prove that concrete has the potential to be the most sustainable building product over its entire life cycle from production to recycling.”
Read more about RCP in the Decemeber 2022 issue of Global Cement Magazine
It’s been a good week for graphene usage in the cement and concrete industries, with a trial set to take place at Breedon Group’s Hope cement plant and the inclusion of four graphene projects in the Global Cement & Concrete Association’s (GCCA) shortlist for its second second Innovandi Open Challenge.
The trial at the Hope cement plant was scheduled to take place on 28 June 2023, alongside First Graphene, Morgan Sindall Construction and the University of Manchester. The plan was to use 1.2t of First Graphene’s PureGraph product by testing different dispersion methods and dosage rates. The graphene was going to be prepared as a grinding aid and then added to cement grinding mill feed. Dispersion into the cement production line was planned to occur over a 24-hour period using traditional grinding aid dosage lines, with minimal operational or mechanical change required to the existing plant.
The cement produced was then going to be validated by Breedon’s quality control team to assess its performance enhancement. Overall the trial was going to produce around 2000t of graphene-enhanced cement during the trial. This cement will then be passed to Morgan Sindall Construction for real-world construction demonstrations. First Graphene reckoned that the trial was going to produce the largest volume of graphene-enhanced cement manufactured to date.
First Graphene and the other partners haven’t released any information yet on how the trial went. However, the results will be used to build on data obtained from smaller scale trials previously conducted at a concrete processing laboratory in the UK.
Elsewhere, the 15 projects shortlisted by the GCCA, as part of the Innovandi Open Challenge, were set to pitch their ideas for access to the scheme. The benefits of inclusion on the scheme include access to industry plants, laboratories, networks and the expertise and infrastructure of the manufacturer members of the association. 70 applications were made for the second Innovandi round. The first round in 2021 was focused on carbon capture and utilisation and two projects eventually made it to the pilot stage. This time the emphasis is on low-carbon concrete.
The graphene-related contenders for Innovandi in the current round include Nano Crete, Nanospan India, SeaMix and Versarien Graphene. All four companies are promoting concrete admixtures that use graphene. Given the brief for this Innovandi round, these projects are focused on concrete production as opposed to the trial at the Hope cement plant, mentioned above, which is testing graphene addition during cement grinding.
Nanospan India, for example, is promoting its Spanocrete product. It says that its admixture acts as a superplasticizer and accelerator, allowing for reduced cement and water consumption, a shorter curing cycle and an increase in compressive strength. US-based SeaMix (part of MEP Group), meanwhile, has developed its own concrete admixture that uses chopped basalt fibres and graphene. It too offers greater compressive strength and reduced cement consumption for the resulting concrete. However, it also allows for the use of any non-potable water source, a compelling selling point for construction companies trying to minimise the use of drinking water.
It is early days yet for the application of graphene in the cement and concrete sectors. Graphene was first produced at the University of Manchester in 2004. Just under 20 years later and various products are emerging with test projects slowly gathering pace and even commercial applications, such as SeaMix and others, building up their portfolios. Various challenges such as reduced workability, the high cost of graphene or even concerns about simply handling graphene get raised in discussions about the wider adoption of graphene-based admixtures but so far these do not seem insurmountable. We await the outcomes of the trial at Hope and the selections of the second round of Innovandi.
Pete Hollingworth appointed as managing director of Concrete Products business by Aggregates Industries
28 June 2023UK: Aggregates Industries has appointed Pete Hollingworth as the managing director of its Concrete Products business. He has spent over 25 years working in the construction industry to date, holding various commercial and managerial positions across the flat roofing, structural waterproofing and flooring industries. Most recently, he was the head of business support in the Europe, the Middle East and Africa region for Sika.
Update on South Africa, June 2023
21 June 2023Mining and materials company Afrimat said it was buying Lafarge South Africa this week. The assets it is acquiring include aggregate quarries, ready mix concrete (RMX) batching plants, one integrated cement plant, two cement grinding plants, cement terminals and fly-ash sources. The means of purchase is somewhat unusual, as Afrimat is paying around US$6m but it also appears to be taking responsibility for around US$50m of outstanding debt that Lafarge South Africa owes its parent company, Holcim. In a statement Afrimat’s chief executive officer (CEO) Andries van Heerden talked up the benefits for his company in terms of the boost to its aggregates and concrete businesses.
This is quite the change from 2012 when India-based Aditya Birla Group was reportedly looking into buying Lafarge South Africa. At this time the value for the business for a similar mix of assets, including 55 RMX plants and 20 quarries, was said to be to US$900m. Prior to this, Lafarge South Africa spent around US$170m in the late 2000s on increasing the production capacity at its integrated Lichtenburg plant and building its Randfontein grinding plant. Then in 2014, when the merger between Lafarge and Holcim was announced, Lafarge consolidated its Nigeria-based and South Africa-based operations as Lafarge Africa. It later decided to move the South African business to another Holcim subsidiary, Caricement, in 2019 to keep the business in Nigeria more profitable by reducing its debts. This transaction was valued at US$317m. At the time chair Mobolaji Balogun said that Lafarge South Africa’s operations had faced a challenging market in South Africa, with shrinking demand in an aggressively competitive sector. Afrimat is now buying Lafarge South Africa and its subsidiaries from Caricement.
Holcim isn’t alone in making an effort to sell up in South Africa. In April 2023 the Valor Econômico newspaper reported that Brazil-based InterCement was receiving offers for its remaining African-based assets in Mozambique and South Africa with a potential deal valued at around US$300m. InterCement runs Natal Portland Cement in South Africa, which operates one integrated plant and two grinding units. This follows the sale of its Egypt-based assets in January 2023 to an unnamed buyer.
PPC, the country’s largest cement producer, is staying put. However, it issued a mixed trading update this week ahead of the formal release of its annual results to 31 March 2023. Trading conditions in the interior of South Africa and Botswana were described as being ‘difficult,’ with cement sales volumes down by nearly 6% year-on-year and earnings before interest, taxation, depreciation and amortisation (EBITDA) down by 26%. Yet the group says it was able to grow its revenue. PPC’s CEO Roland van Wijnen added, “We therefore remain hopeful that the South African government will roll out its infrastructure development plans and protect the local cement market through the introduction of import tariffs to create a level playing field for domestic producers.” Dangote Cement subsidiary Sephaku Cement was more circumspect in its recent trading update but it too warned that, “deteriorating economic conditions and persistent challenges in the cement industry impacted Sephaku Cement’s financial performance to break-even levels.”
Much of the above makes for gloomy reading. As the local trade association Cement and Concrete South Africa (CCSA) has laid out to local media, the market faces the problem of having 20Mt/yr of production capacity, 12Mt/yr of demand and over 1Mt/yr of imports compounding the problem. Lobbying by local producers against imports has been a feature of the market since the early 2010s and this work continues through the efforts of the CCSA and others. However, the plea by PPC for government infrastructure spending suggests that the market faces more systemic problems. As a consequence some cement producers are trying to leave the market, while others are attempting to tough it out.
Update on cement diversification, June 2023
07 June 2023Taiwan Cement said this week that it is aiming for cement to account for less than half of its sales by 2025. At the annual shareholders’ meeting chair Nelson Chang defended the cement sector as a core business but said that the company was expanding more into the green energy sector through its energy storage and vehicle charging lines. Chang directly linked the strategy to growing carbon taxes around the world, such as the European Union Emissions Trading Scheme, where the carbon price has been occasionally close to pushing past Euro100/t since early 2022. Taiwan Cement formed a joint venture with Türkiye-based Oyak Group in 2018 that runs Cimpor in Portugal.
Company |
Cement share of business |
Other main sectors |
CNBM |
45% |
Aggregates, concrete, gypsum, wind turbines, batteries, engineering |
Anhui Conch |
78% |
Aggregates, concrete, sand, trading |
Holcim |
51% |
Aggregates, concrete, lightweight building materials |
Heidelberg Materials |
44% |
Aggregates, concrete, asphalt |
UltraTech Cement |
95% |
Concrete |
Taiwan Cement |
68% |
Power supply, rechargeable lithium-ion battery, sea and land transportation |
Taiheiyo Cement |
70% |
Aggregates, concrete |
Table 1: Cement business share by revenue of selected cement producers. Source: Corporate annual reports.
Taiwan Cement’s plan to decrease its reliance on cement is becoming a familiar one. Holcim notably revealed in 2021 that it was growing its light building materials division. Its cement division represented 60% of sales in 2020 with concrete and aggregates making up most of the rest to 92% and the remaining 8% on other products including light building materials. This started to change with the acquisition of roofing and building envelope producer Firestone Building Products in 2021. Other similar acquisitions have followed. Holcim’s current target is to grow the Solutions & Products division to around 30% by 2025, with cement reduced to somewhere between a third and half of sales. Earlier this year Japan-based Taiheiyo Cement said it was doing a similar thing as part of its medium-term strategy to 2035. In its case cement represented 70% of its sales in 2022 but it is now aiming to reduce this to 65% by 2025 and 50% by 2035.
A common pattern for the business composition of European cement companies is a mixture of heavy building materials made up of cement, concrete and aggregate. However, not every cement company follows the same route. Some cement companies are simply parts of larger conglomerates. UltraTech Cement, for example, is mostly just a cement company. However, it is also part of Aditya Birla Group, which runs a wide range of industries including chemicals, textiles, financial services, telecoms, mining and more. Depending on how one looks at it, UltraTech Cement’s cement business ratio is large or Aditya Birla Group’s ratio is small. Siam Cement Group (SCG) in Thailand is another example of a cement producer operated by a conglomerate with other major businesses.
A different approach that some cement producers take is to mix cement production with complimentary businesses outside of heavy building materials. A good example of this is Votorantim Cement in Brazil, which manufactures cement and steel. Companhia Siderúrgica Nacional (CSN) is another Brazil-based cement producer that is also well known for steel production. Adani Group in India, meanwhile, was well known for logistics, power generation and airports before it purchased Ambuja Cements and ACC from Holcim in 2022.
The driver for cement companies looking to reduce cement as a proportion of their businesses has varied between the three examples presented above. Holcim’s approach has been in response to growing European carbon costs but it also fits with a general desire to broaden its business as the company has sought to reshape itself following the merger between Lafarge and Holcim. Taiheiyo Cement’s plans also have a sustainability angle but the Japanese market has been in slow decline since the 1990s and this has been made worse by the spike in energy prices since 2022. Investing in new businesses makes sense for either of these reasons. Lastly, Taiwan Cement says it is taking action in response to carbon prices around the world. However, its proximity to many other large-scale producers in the Far East may also be a factor. Whether more companies follow suit and also start to reduce the ratio of their cement businesses remains to be seen. Yet, mounting carbon taxes and global production overcapacity look set to make more of the larger cement producers consider their options in certain places.