Displaying items by tag: low carbon cement

The mood music for this year’s United Nations Climate Change Conference (COP29) in Azerbaijan has been poor. Despite this though the decarbonisation prospects for the cement sector are looking rosier than other industries.

First, the negatives. People are starting to question whether the COPs are fit for purpose. Donald Trump’s election as President-Elect in the US before the event started pretty much set the tone given that he intends to withdraw from the Paris climate agreement. Again. Azerbaijan's President Ilham Aliyev described his country’s natural gas resources as a “gift from God” following reports that, once again, COP national delegates had been caught promoting fossil fuel deals. France and Argentina also withdrew their lead negotiators for differing political reasons. Meanwhile, there has been increasing lobbying against carbon capture from the environmental sector. In short the view is growing that carbon capture is a delaying tactic by fossil fuel companies rather than a viable solution. This poses a threat to the cement sector because its current net zero roadmaps require carbon capture.

The World Cement Association’s CEO Ian Riley asked in a statement whether there might be “...a shift toward negotiations driven by the major emitters - China, the US, India, Russia, and Saudi Arabia.” However he observed that none of these countries yet seem ready to lead on the climate agenda globally.

Now, the positives. Cement CO₂ sector emissions may have continued to fall in 2023. The Global Carbon Project published its Global Carbon Budget 2024 in mid-November 2024. It predicts that global fossil CO₂ emissions will rise by 0.8% year-on-year in 2024 with emissions from coal, oil and gas still mounting. However, emissions from cement producers are expected to fall by 0.8%. This trend started in 2022. It appears to be due to declines in China, the US and the EU but, notably, not in India. It’s worth commenting here that this decline may be principally down to the parlous state of the real estate market in China, but there is also a lot of decarbonisation work happening. We’ll take a win where we can.

Next, the Global Cement and Concrete Association’s two big announcements at COP29 have been the publication of its Cement Industry Net Zero Progress Report 2024/25 and the launch of international definitions for low carbon cement and concrete. The progress report proffers a nifty update on how well it’s going. Short version: 23% reduction in emissions intensity since 1990; lots going on; plenty more to do.

One of those issues that require attention is low-carbon procurement. Hence those international definitions. This may seem like an abjectly boring topic but never underestimate the power of standards upon building materials. This should help support governments, policy makers and the private sector to set low carbon procurement rules. Since governments are among the biggest buyers of building materials worldwide, both directly and indirectly, this is intended to start speeding up decarbonisation by driving demand for existing lower carbon cement and concrete products. Whether this is the tool that cracks the global adoption of low carbon building materials remains to be seen. Yet the long lead time it took the Portland Cement Association (PCA) in the US, for example, to promote the use of Portland Limestone Cement is both instructive and inspirational. It can be done and it can deliver results.

COP29 has been described as the ‘finance COP’ because the representatives are hoping to set a new global climate finance target. This target, or new collective quantified goal (NCQG), is seen as one of the summit's main outcomes. It is intended to replace the existing US$100bn goal that is due to expire in 2025. However, the question of how much each country pays has predictably caused disagreements between developed, developing and those countries in between. All of this is well above the ‘paygrade’ of the cement sector but is crucial to what happens next, because it’s going to get expensive. Establishing regional carbon capture infrastructure requires serious funding. Time will tell whether COP29 can actually further this aim. The arguing continues.

Taiwan: Taiwan Cement Corporation (TCC) and 100 construction firms have together launched the Low Carbon Construction Pioneer Alliance. CNA News has reported that the founding members eliminated 146,000t of CO₂ emissions altogether through their use of reduced-CO₂ building materials since November 2024. This includes despatches of 800,000m³ of Portland limestone cement (PLC) concrete by TCC, with 2.5Mm³ in cumulative orders to date. TCC first launched its PLC in October 2023, touting an emissions reduction of 15% compared to ordinary Portland cement (OPC). It since enlarged the net reduction to 24% through production modifications.

Taiwan Cement chair Zhang Anping said "TCC took the initiative to align with the Global Cement and Concrete Association and released the lowest-carbon PLC concrete in Taiwan. The CO₂ reduction is far greater than the 53% as defined by the government.”

Europe: Titan Group and Ecocem will partner for the development of Ecocem's low-carbon cement technology, ACT, in Europe. This partnership will produce a new low-carbon cement by substituting a ‘substantial portion’ of clinker with supplementary cementitious materials, reportedly reducing cement's carbon footprint by up to 70%.

India: Global Cement & Concrete Association (GCCA) India has entered talks with UK-based Xynteo and the Build Ahead coalition to scale up decarbonisation in India’s construction sector. The partners have signed a memorandum of understanding to promote low-carbon cement and concrete usage. This two-year collaboration will develop emission thresholds for cement and concrete as a basis for future policy on production and use of low-carbon materials. The initiative will also include joint governmental engagement and the sharing of research for low-carbon building materials.

Deepak Khetrapal, GCCA India co-chair and Orient Cement managing director, said "The reduction of clinker factor and the increasing use of supplementary cementitious materials in cement manufacturing is an important decarbonisation lever for the industry. Developing an India-specific definition for ‘low-carbon’ or ‘green’ cement and concrete is the need of the hour, and it is crucial for the development of a net zero CO₂ roadmap for the Indian cement and concrete industry."

UK: Heidelberg Materials UK has launched evoBuild, a global brand for low-carbon and circular cement, ready-mixed concrete, aggregates and asphalt products, in line with its parent company's sustainability strategy. According to the company, EvoBuild products either reduce CO₂ emissions by at least 30% or incorporate at least 30% recycled content.

This launch complements evoZero, the ‘world's first carbon-captured net-zero cement’, launched by Heidelberg Materials in November 2023. All eligible products from Heidelberg Materials UK will be integrated into the evoBuild portfolio ‘over the coming years.’

US: Terra CO₂ has received a US$52.6m federal grant from the US Department of Energy to support the construction of a new plant in Magna, Utah, that will produce up to 240,000t/yr of supplementary cementitious materials using mining waste from the nearby Kennecott copper mine. This method reportedly aims to cut CO₂ emissions by 70% per tonne of traditional cement replaced, according to the company’s CEO Bill Yearsley. The project is expected to create 61 jobs.

US: California-based climate technology startup Furno Materials has been awarded US$20m by the US Department of Energy (DOE) for a new ‘low-carbon’ cement production facility in Chicago. The facility will use recycled industrial byproducts to produce cement, with the aim to reduce carbon emissions ‘significantly’, according to the Chicago Business Journal. This investment is part of a broader DOE initiative that is funding 14 projects totalling US$428m, in order to address clean-energy supply chains and boost US manufacturing. The project is expected to create 80 jobs.

Indonesia: Suvo Strategic Minerals has reported successful laboratory tests in collaboration with Makassar State University (UNM) in Indonesia, transforming nickel slag into a ‘high-strength, low-cost and low-carbon’ cement, according to The Sydney Morning Herald. The trials used slag from PT Huadi Nickel-Alloy Indonesia's operations in South Sulawesi, achieving a compressive strength of 37.5MPa after seven days. The company is now looking to conduct further testing and will provide the results to PT Huadi, with the aim of forming a partnership for the commercialisation of low-carbon cement using nickel slag.

Aaron Bank, executive chair of Suvo Strategic Minerals, said “We are excited to have commenced this workstream in Indonesia testing the byproduct of one of the country’s largest mining companies, with our ultimate goal being to manufacture an environmentally-friendly and low-carbon alternative to Portland cement. Achieving up to 37.5MPa after only seven days is an outstanding first round trial result for the company and could provide an entry into a large industry.”

Vietnam: Fico Tay Ninh Cement has launched ‘green-labelled’ cement with CO₂ emissions between 350-600kg/t, 70% lower than traditional Portland cement, according to Tuoi Tre News. Director of Fico Tay Ninh Cement, Nguyen Cong Bao, said that the company has invested in automated production lines and research and development to produce this ‘eco-friendly’ cement, aiming to offer it at competitive prices due to cost-saving technologies.

In addition, SCG Concrete Roof Company has introduced its own ‘green’ cement to the local market, reducing carbon emissions by 20% during production compared to traditional Portland cement.

Ireland: New regulations effective from 1 September 2024 require all state-funded building projects in Ireland - including roads, schools, and hospitals - to use low-carbon cement. The directive prohibits the use of CEM I cement, mandating a minimum of 30% replacement of clinker with low-carbon alternatives for public projects.