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The Indonesian government emphasised its intention this week to use ‘green’ cement in the construction of its new capital city Nusantara in Borneo. However, this begs the question: what exactly is ‘green’ cement?

In this case, Mohammad Zainal Fatah, the secretary general of the Ministry of Public Works and Public Housing, told state media that his department was “seeking to encourage the supply of domestic-industry-based material resources and construction equipment, which can support sustainable infrastructure development principles." The ministry is working with state-owned cement producers such as Semen Indonesia (SIG) to ensure the provision of sustainable cement and related products. SIG was selected as a supplier for the project in late 2022 and, as of February 2024, has reportedly provided 400,000t of cement from its plants at Balikpapan and Samarinda.

This is admirable stuff. However, the timing of the announcement is curious given that both the head and deputy head of the Nusantara Capital City Authority resigned this week forcing the government to reassure investors that the project was still on. Cue some swift discussion about ‘green’ cement! Previously it was hoped that the first phase of the US$34bn project could be inaugurated on the country’s independence day in August 2024 with civil servants scheduled to start relocating to the site in the autumn.

SIG sells a number of ‘green’ blended cement products and some of these have received Green Label Cement certification from the Green Product Council Indonesia. The group says that these products have contributed up to a 38% drop in CO₂ emissions compared to Ordinary Portland Cement (OPC). This compares to the group’s clinker factor reduction rate of 69% and its Scope 1 emissions intensity reduction of 17% to 585kg/CO₂/t of cement in 2023 compared to 2010 levels.

Along similar lines, the Alliance for Low-Carbon Cement & Concrete (ALCCC) in Belgium also announced this week that it had released a new policy roadmap aimed at achieving net zero emissions by 2040. Amongst its recommendations were a focus on the standards for cement and concrete to promote low-carbon products and encouragement to create lead markets to develop demand for them.

Crucially, the ALCCC uses low-carbon cement in place of ‘green’ cement and this makes its definition clearer. ‘Green’ cement is a marketing term intended to associate cement with environmentalism. Yet there is no accepted definition describing how these products are more sustainable than, say, OPC. For example, a so-called ‘green’ cement could use 100% clinker manufactured with no CO₂ emissions-abatement, but it might be sustainable in other ways such as saving water. For the purposes of this article we’ll assume that ‘green’ cement means a low-carbon one. To further add to the confusion, ‘green’ concrete can be made using OPC in various ways but that’s beyond the scope of this piece. Clearly the world could do with some universal definitions.

US-based research and consulting company Global Efficiency Intelligence came to the same conclusion when it published its ‘What are Green Cement and Concrete?’ report in December 2023. It decided that - despite there being plenty of standards, protocols, and initiatives - there is no general agreement on the definition of ‘green’ cement or concrete. Its emissions intensity for cement summary table can be viewed below. It demonstrates the massive range of emissions intensity between the various standards. It is worth noting here that the description the Indonesian government may have been using for ‘green’ cement could already meet SIG’s Scope 1 emissions intensity reduction for its cement in 2023 depending on the standard being used.

Table 1: Emissions intensity definition for cement as stated by standards, protocols, initiatives, and policies with stated numerical quantity targets. Source: Global Efficiency Intelligence.

Part of the problem here is that there is a language gap between the simple definition of a cement that is less CO₂ emissions-intensive than OPC and the technical definitions used in the specifications and standards. Simply describing a cement product as ‘green’ can potentially cover anything that is slightly better than OPC down to a bona-fide net-zero product. Added to this is pressure from the manufacturers of new and existing cement products that use less or no OPC for regulators to move to performance-based standards to replace existing prescriptive standards, because it makes it easier for their products to be used. For more on this issue see Global Cement Weekly #606. Cement associations such as Cembureau and the Global Cement and Concrete Association (GCCA) have also called in their respective net zero roadmaps for changes to the standards system to promote low-carbon cement and concrete products.

The answer to what is ‘green’ cement is whatever the promoters want it to be. So, it might be helpful if the use of the word ‘green’ were banned in connection to any marketing activity related to cement products. Everyone could then adopt some kind of universal grading system using simpler language. One approach might be to copy the colour-coding scheme used by hydrogen to describe how it is made. One could use yellow for limestone blends, silver for slag, orange for clay, black for OPC made with carbon capture and so on… but not green! Another route might be to mandate the use of the carbon labels that some cement producers have used for at least a decade. Or something like the alphabet energy rating system used in the UK and EU for electrical appliances could be used. It’s too much to hope for a global system but simpler systems in the main markets would make it much easier to determine what exactly is ‘green’ cement.

Peter Edwards, Editor of Global Cement Magazine, discusses ‘sustainable’ cement in The Last Word in the June 2023 issue

UAE: Gulf Cement Company has appointed Mohamed Ahmed Ali Ebrahim as its CEO. He was previously working as the company’s Acting CEO.

Indonesia: The Ministry of Industry is preparing a comprehensive roadmap for decarbonising the cement industry, due for initial implementation by the end of 2025. Newsbase Daily News has reported that that the roadmap includes targets for CO₂ emissions reduction, alternative fuels substitution and energy efficiency. It will also focus on developing new technologies and implementing supportive policies for the transition. The ministry noted that the Indonesian cement industry is already working to reduce its carbon footprint through multiple initiatives.

UK/Poland: SigmaRoc announced it has entered a share purchase agreement and exercised a call option to acquire the Polish lime operations of CRH. The deal, valued at €100m for deferred consideration, follows SigmaRoc's acquisition of CRH's lime operations in Germany, Ireland, the Czech Republic and the UK. The acquisition includes two production sites in Kujawy and Sitkowka, along with an associated distribution network. Completion is contingent upon clearance from the Polish Competition Office, anticipated by the end of September 2024.

SigmaRoc said it is ‘pleased’ with the progress to date on the integration of the German, Czech, Irish and UK entities, and will provide a further update alongside its interim results for the period ending on 30 June 2024.

UK: Holcim has completed the acquisition of Land Recovery. This acquisition broadens Holcim's access to construction demolition materials, with Land Recovery having recycled over 300,000t in 2023. The deal follows the previous purchase of Sivyer Logistics.

CEO of Holcim, Miljan Gutovic, said "Land Recovery strengthens Holcim’s leading position in circular construction and advances our group target of recycling 10Mt of construction demolition materials in 2024. I look forward to welcoming all 85 employees of Land Recovery and investing in our next era of growth together."

Pakistan: Cement dispatches rose by 7.8% reaching 4.275Mt in May 2024 from 3.97Mt in May 2023. According to data from the All Pakistan Cement Manufacturers Association (APCMA), local sales fell by 2.2% to 3.36Mt, while exports increased by 72% to 0.91Mt. Over the first 11 months of the financial year, total dispatches were up 3% year-on-year to 41.7Mt. Domestic sales dropped 4% to 35Mt, but exports grew by 66% to 0.66Mt.

An APCMA spokesman said “It is a matter of serious concern that the cement sector continues to post negative growth in local dispatches for the ninth straight month. We are hopeful that the government will give due attention to the concerns of the cement industry in the upcoming budget. We have an almost one-third idle capacity which, if utilised, can bring our operational costs down and provide relief to end-consumers

Global: Policymakers, including those from the governments of Canada, the UAE and Thailand, are meeting cement industry CEOs in Bangkok to discuss how to further advance the decarbonisation of the cement industry. Thailand’s Minister of Industry, Pimphattra Wichaikul, opened the conference.

Wichaikul said “Thailand is one of the first countries in the word with a credible national roadmap for delivering on the cement industry’s net zero commitments. Key to success is innovation, cross-sectorial cooperation, strong leadership with clear targets and international collaboration to drive policy and implementation.”

Fernando González, CEO of Cemex and President of the GCCA, said “We have strong commitments and are already delivering the goal of building a more sustainable industry, and by working with governments, policymakers, built environment experts and other key players we have the opportunity to accelerate our progress in this important ‘decade to deliver’.”

The UN’s Industrial Development Organization (UNIDO) also unveiled a new package of investment, technical and other support, to help Thailand decarbonise its own cement industry.

Indonesia: The local government will begin using 'green' cement supplied by state-owned PT Semen Indonesia (SIG) in a bid to ensure sustainable construction in the new capital of Nusantara. This initiative will be a partnership to provide 'green' cement and cement-based products between SIG and PT Bina Karya, a state-owned company carrying out property development in Nusantara. Through 'green' cement production, the company has reportedly recorded a reduction in carbon emissions of up to 38% per tonne of cement so far.

SIG was chosen to supply materials for infrastructure development needs in Nusantara in December 2022. As of February 2024, the company has supplied 0.4Mt of cement from its production facilities in Balikpapan and Samarinda, near Nusantara.

PUPR Ministry’s secretary general, Mohammad Zainal Fatah, said "The Ministry of Public Works and Public Housing (PUPR) is seeking to encourage the supply of domestic industry-based material resources and construction equipment, which can support sustainable infrastructure development principles. SIG has the advantage of extensive production and distribution networks that are able to meet development needs in all regions in Indonesia.”

Thailand: B.Grimm Power has partnered with Siam City Cement (SCCC) to establish a joint venture named ‘Insee B.Grimm Solar.’ This collaboration aims to develop a solar rooftop project and a ground-mounted solar photovoltaic (PV) project within SCCC’s plant located in Saraburi province.

This project is expected to contribute to Thailand’s clean energy goals by reducing reliance on fossil fuels and integrating renewable energy sources into industrial operations. Specific details regarding the project’s capacity and timeline are not yet available.

Nigeria: Riga has announced its partnership with Lafarge Africa for a kiln shell replacement project in Nigeria. The project will take place at the Lafarge plant in Ewekoro, 64km from Lagos.