Displaying items by tag: low carbon cement

India: ACC and Ambuja Cements have partnered with the Indian Institute of Technology Delhi (IITD) to develop a range of calcined clay cements with 50% lower CO₂ emissions than Ordinary Portland Cement (OPC). The collaboration will vary clinker, calcined clay and limestone levels in calcined clay cements in order to ascertain their effects on its performance. France-based Holcim Innovation Centre will fund the research.

Holcim India chief executive officer and managing director Neeraj Akhoury said "Through our extensive research and development setup, we consistently strive to develop new low-CO₂ materials for the construction industry. Calcined clay cement is one such avenue to make a significant quantitative difference in the industry and further accelerate our sustainability drive. Our academic partnership with IITD is a big step towards building a greener future and we are excited to collaborate with the best minds in the country."

The producers have previously partnered with the Indian Institute of Technology Madras (IITM) to study low-CO₂ binders with alternative reinforcements and with the Indian Institute of Technology Hyderabad (IITH) to develop smart sensing technology for continuous on-site strength evaluation of a concrete structure.

Climate activist Greta Thunberg memorably summarised the outcome of the 2021 United Nations (UN) Climate Change Conference (COP26) as “blah, blah, blah” but what did it mean for the cement and concrete industries?

Making sense of the diplomatic language the UN uses is a full time job due to its impenetrable jargon. This is partly why climate activists and others may have become jaded about the outcome of the world’s biggest climate change jamboree. The conference of the parties (COP) tried desperately to hang on to the 1.5°C warming aim set at the Paris event (COP21) in 2015. This is dependent though on countries sticking to their 2030 targets and becoming net-zero by 2050 or earlier. Unfortunately, both China and India, two of the world’s current top three CO₂ emitters, have announced net-zero dates of after 2050. Those two countries also drew fire in the western press for weakening the language used in the COP’s outcome document about the ‘phasing out’ or ‘phasing down’ of coal use. However, simply getting coal written on the final agreement has been viewed as a result. Other positive outcomes from the event included commitments for countries to review their 2030 targets in 2022, progress towards coordinating carbon trading markets around the world and work on adaptation finance from developed countries to developing ones.

The headline results from COP26 carry mixed implications for the building materials sector. The Paris agreement (COP21) has already achieved an effect in the run-up to COP26 by prompting the cement and concrete industries to release a roadmap from the Global Cement and Concrete Association (GCCA) in October 2021. Now it’s down to whether individual governments actually follow the targets and how they enforce it if they do. If they don’t, then the response from building material producers is likely to be mixed at best.

What may have a more tangible effect is the work on carbon markets at COP26. Countries were finally able to complete technical negotiations on the ‘Paris Agreement Rulebook,’ notably including work on Article 6, the section that helps to govern international carbon markets and allows for a global carbon offsetting mechanism. The European Union (EU) Emissions Trading Scheme (ETS) has shown over the last year how a high carbon price may be able to stimulate companies to invest in mitigation measures such as upping alternative fuels substitution rates and developing carbon capture and storage/utilisation projects. Critics would argue that it may simply be offshoring cement production and closing local plants unnecessarily. Making a more global carbon trading scheme work amplifies both these gains and risks. Either way though, having an international framework to build upon is a major development. Finally, work on adaptation finance could have an effect for cement producers if the money actually makes it to its destination. The big example of this announced at COP26 was a US$8.5bn fund to help South Africa reduce its use of coal. It is mainly targeted at power generation but local cement producers, as a major secondary user of coal, are likely to be affected too.

Alongside the big announcements from COP26 lots of countries and companies, including ones in the cement sector, announced many sustainability plans. One of these included the launch of the Industrial Deep Decarbonisation Initiative (IDDI) during COP26 by the governments of the UK, India, Germany, Canada and the UAE. This scheme intends to create new markets for low carbon concrete and steel to help decarbonise heavy industry. To do this it will disclose the embodied carbon of major public construction projects by 2025, aim to reach net zero in major public construction steel and concrete by 2050, and work on an emissions reduction target for 2030 which will be announced in 2022. Other goals include setting up reporting standards, product standards, procurement guidelines and a free or low-cost certification service by 2023.

All of this suggests that the pressure remains on for the cement and concrete sector to decarbonise, provided that the governments stick to their targets and pledges, and back it up with action. If they do, then the industry will remind legislators of the necessity of essential infrastructure and then continue to ask for financial aid to support the development and uptake of low carbon cements, carbon capture and whatever else. Further adoption of carbon markets around the world and global rules on carbon leakage could help to accelerate this process, as could adaptation finance and global standards for low carbon concrete. The next year will be critical to see if the 1.5°C target survives and the next decade will be crucial to see if global gross cement-related CO₂ emissions will actually peak. If they do then it will be a case of ‘hip hip hurrah’ rather than ‘blah blah blah’.

Greece: Titan Cement has recorded sales of Euro1.26bn in the first nine months of 2021, up by 5% year-on-year from Euro1.2bn in the first nine months of 2020. Its earnings before interest, taxation, depreciation and amortisation (EBITDA) fell by 4.3% to Euro220m from Euro229m, while its net profit rose by 41% to Euro81.9m from Euro58m.

During the third quarter of 2021, Titan Cement’s US low-carbon cement sales reached 50% of its total US cement sales. It also continued with hydrogen enrichment pilot studies in its cement kilns in Bulgaria and Greece.

Croatia: Holcim Croatia plans to invest Euro1.28m to upgrade the dosing equipment of its Koromačno cement plant’s kiln line. The planned upgrade will enable the line to increase the proportion of alternative materials used in its cement production, thus equipping the plant for low-carbon cement production. Innovation Norway has granted the producer Euro441,000 towards the cost of the project.

Managing director Nikola Kovačević said “Mineral admixtures in cement have a threefold benefit: on the one hand, different characteristics are created in the cement to meet the requirements of different types of construction; on the other hand, the exploitation of natural resources decreases. Thirdly, the carbon footprint of the cement is thus reduced through the lowering of the clinker factor.”

Germany/Brazil: Researchers at the Martin Luther University Halle-Wittenberg in Saxony-Anhalt and the University of Pará in Pará have produced a cement alternative with 66% reduced CO₂ emissions. A type of calcium sulphoaluminate cement, it replaces up to 60% of limestone in clinker with overburden from bauxite mining. Researchers demonstrated that the resulting product conforms to all standards for commercial Ordinary Portland Cement. The results of the research have been published in ‘Sustainable Materials and Technologies.’

Holcim has started to unify its low carbon cement product range this week with the launch of its ECOPlanet label globally. The products are already available in Germany, Romania, Canada, Switzerland, Spain, France and Italy. The plan is to extend this to 15 countries by the end of 2021 and then to double its ‘market presence’ by the end of 2022.

The headline news is that the range will include what Holcim says is the world’s first cement product with 20% recycled construction and demolition waste. This appears to be an improvement on the group’s Susteno cement products that use fine fractions from concrete and demolition waste. This product is currently sold in Switzerland where it is advertised as saving 10% of CO₂ emissions compared to a standard cement product. Both Holcim and HeidelbergCement already sell concrete products that use the coarse waste from building demolition. Other than this, Holcim says that the range will also include cements that contain calcined clay. In June 2021 subsidiary Lafarge France announced that it would produce a cement product under the ECOPlanet banner using kaolin clay with its proprietary ProximA Tech process at its integrated La Malle cement plant in Bouc-Bel-Air.

We will have to wait and see how far Holcim goes in standardisng the range between different countries. Yet, judging from what the countries that are already selling ECOPlanet are doing, it looks like it will be a variety of blended cements. At present, for example, Holcim Germany offers four products in the ECOPlanet range. These are all slag cements, with three having effective CO₂ reductions of up to 70% and the fourth, ECOPlanet Zero, reaching 100% through a carbon offsetting scheme in conjunction with MoorFutures. Holcim Italy also launched a product in the range called ECOPlanet Prime using calcined clay in June 2021.

Incidentally, LafargeHolcim US announced a research project this week with the US Army about using demolition waste. It’s going to start working with the US Army Corps of Engineers’ Engineer Research and Development Center and Geocycle to look at how construction and demolition materials from military installations can be used for energy recovery and mineral recycling. Group resources at Geocycle’s Holly Hill Research Center in South Carolina, US and Holcim’s Global Innovation Center in Lyon, France will be used in the scheme.

Other low carbon cement products are available of course. Holcim is far from alone in launching low CO₂ cement and concrete products. Yet the use of worldwide brand names is different. Cemex is doing something similar with the global rollout of its Vertua concrete products. It first launched Vertua in France in 2018 before going global in 2020. Holcim started to launch ECOPact Concrete in 2019. Now, Holcim has gone further by doing the same thing with cement. Given how localised cement and concrete products are, it will be instructive to see how global branding for low carbon cementitious products helps these companies. For instance, who is the target audience? It could be eco-minded self-build customers or project specifiers or government departments or industry lobbyists. Or perhaps it is simply another marketing channel to reinforce the sector’s sustainable offerings.

The other point worth considering is when will the multinational cement producers start selling sustainable cements and concretes in less rich parts of the world? While Holcim was playing with blended cements and marketing this week, Dangote Cement said that it was ready to start commissioning its new 6Mt/yr integrated plant at Okpella, Edo State in Nigeria. Another 5Mt/yr plant is also on the way in the country from Madugu Cement. It has just signed a contract for China-based Sinoma International Engineering Company to build it. When Holcim and the other cement companies start selling low carbon cements in places like Nigeria then the rise of these products will be complete.

For more information on low CO₂ cement production read our feature in the February 2021 issue of Global Cement Magazine

Australia: Calix has joined as a partner of the Heavy Industry Low-carbon Transition Cooperative Research Centre (HILT CRC). The initiative brings together heavy industry players, government and research and aims to boost the capability of Australian companies to remain globally competitive by capitalising on existing mineral and renewable energy resources to become international producers and exporters of low-carbon products. HILT CRC has secured US$29m from the government. This joins funding of US$158m in direct and in-kind contributions from its partners over the last decade.

“It is a chance for us to demonstrate the technology developed for CO₂ mitigation in the production of cement and lime through our European LEILAC-1 and 2 projects in an Australian setting, as well as explore other more sustainable applications for our technology in heavy industry, backed by this impressive team of researchers and industrial participants," said Calix’s managing director Phil Hodgson.

As part of the HILT CRC, Calix will continue to develop its technology for the reduction of carbon emissions from lime and cement production, and also use its Calix Flash Calciner (CFC) technology to develop other more processing applications such as for bauxite processing for the aluminium industry and production of calcined clay from kaolinite for use in new lower carbon cements.

HILT CRC’s core industrial partners include Adbri, Alcoa, Boral, Fortescue, Grange Resources, Liberty, Roy Hill and South32. The initiative has its headquarters in Adelaide and it plans to establish hubs in heavy industry regions of Gladstone, the Pilbara, Northern Tasmania, South Australia’s Upper Spencer Gulf, Western Australia's Kwinana and South West regions, the Southern Highlands of Nnew South Wales and Portland in Victoria.

France: LafargeHolcim subsidiary Lafarge France has completed the renovation of its 70m³/hr Larrieu concrete plant in Toulouse, Haute-Garonne Department. The renovated facility is equipped with six cement silos, two of which are dedicated to low-carbon cements for the production of ECOPact low-carbon concrete. It also has eight aggregate hoppers, including one dedicated to recycled concrete aggregates, and two mixer loading stations with forward truck access for safety. The total cost of the upgrade was Euro3m.

Haute-Garonne sector head Vincent Pelloquin praised the project’s speed and ability to rebuild the concrete plant in the middle of the coronavirus pandemic.

Lafarge France is presently engaged in a systematic modernisation of its concrete plants.

France: Hoffmann Green Cement Technologies has announced the signing of a supply contract with precast concrete structural engineers CAPREMIB. It says that the contract covers the supply of a minimum volume of low-carbon cement for the production of wooden concrete sound barriers for use in stadia and public spaces such as underground stations.

Co-founders Julien Blanchard and David Hoffman said, “We are delighted to have signed this contract with CAPREMIB, a highly innovative player in the construction sector. This partnership follows months of technical tests, and will allow the CAPREMIB group to produce wooden concrete acoustic screens with a lower carbon footprint. Combining wood and concrete in the manufacturing of this type of product meets market expectations and illustrates our ability to continually increase the growing number of applications for our technologies.”

France: LafargeHolcim France says that it has “responded to the demand for low-carbon concretes” with the launch of a CEM-II Portland limestone cement product with 25% lower carbon dioxide (CO₂) emissions than Ordinary Portland Cements (OPC) in its Galaxim Planet range. The new addition to the range, of which LafargeHolcim plans to produce 100,000t by 31 December 2020, contains 35% limestone, up by 23% from 12% in ordinary Portland limestone cement.

LafargeHolcim France south region cement sales director Olivier Mespouilles said, “Our goal is to offer all builders a cement offering properties equivalent to a conventional cement with the advantage of a reduced carbon footprint. This tour de force was successful thanks to the involvement of all our teams, and we are the first player in France to offer this type of limestone cement in such a volume." The cement is due to enter the market in the Languedoc-Roussillon region. From 2021 the company hopes to supply 80% of customers there with the low-carbon cement.