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Ecocem announced this week that it has achieved certification in the US for its ACT low-carbon cement technology. This follows CRH’s agreement to buy US-based Eco Material Technologies, a supplier of supplementary cementitious materials (SCM), which was revealed in late July 2025. These moves and others mark a flurry of activity by various companies in the US SCM sector in recent months.

Donal O’Riain, the founder and managing director of Ireland-based Ecocem, underlined the importance of certification in North America when he said that “The US is one of the largest cement markets in the world, and this certification will support integration into existing supply chains and offers a pathway for the sector to rapidly decarbonise.” The country imported just under a fifth, 19Mt, of its Portland and blended cement in 2024 according to the United States Geological Survey (USGS).

Ecocem started out as a manufacturer of cements made using ground granulated blast furnace slag (GGBS), a SCM, in the early 2000s. Its ACT technology was formally announced in 2022. It is described as a process that can make cements using “available fillers like limestone and local SCMs.” It is currently scheduled for a commercial launch in 2026, starting in France. In the US it is planning to build a terminal and mill at the Port of Los Angeles in California. This follows a previous attempt to build a slag grinding plant, also in California, in the 2010s.

CRH, another cement company with strong links to Ireland incidentally, said on 29 July 2025 that it had agreed to acquire Eco Material for US$2.1bn. The latter operates a network of fly ash, pozzolan, synthetic gypsum and green cement operations. It partners with electricity generators to process about 7Mt/yr of fly ash and 3Mt/yr of synthetic gypsum and other materials. As CRH’s CEO Jim Mintern put it, “this transaction secures the long-term supply of critical materials for future growth and puts CRH at the forefront of the transition to next generation cement and concrete.” The deal is expected to close by the end of 2025. In separate comments to analysts Mintern added that he expects the market for SCMs to double in the US by 2050.

Other players have also been busy in recent months. Amrize, for example, noted in its financial results for the second quarter of 2025 that it had broken ground on a new fly ash beneficiation facility in Virginia in the reporting period. Last week, Graymont and Fortera signed an agreement to produce Fortera’s ReAct low-carbon cement product by using Graymont’s existing lime production operations. Fortera runs a plant in Redding, California that takes captured CO₂ from the adjacent CalPortland cement plant and uses it to manufacture its own proprietary SCM. Back in April 2025 Buzzi Unicem said that it had partnered with Queens Carbon to produce a novel cement and SCM. The start-up was intending to build a 2000t/yr demonstration plant at Buzzi Unicem’s cement plant in Stockertown, Pennsylvania.

The backdrop to all of this attention on SCMs in the US are the cost of cement and sustainability. Using more SCMs reduces clinker usage in cement and it can reduce the cost. At the same time reducing the amount of clinker used decreases the amount of CO₂ emissions. So, for example, Ecocem says that its ACT technology can reduce CO₂ emissions by up to 70% compared to conventional cement.

A report by Mckinsey on SCMs in the autumn of 2024 reckoned that growth in the cement market in North America was expected to be ‘robust’ in the next 15 years to 2050. However, the sector faces material, particularly clinker, and labour shortages. Enter SCMs! It went on to assert that much of the available stocks of GGBS and fly ash in the country are effectively used. Yet, traditional industrial SCMs such as GGBS, fly ash and limestone are anticipated to be available for longer than in Europe as industries such as steel manufacture and electricity generation will take longer to decarbonise. Hence companies such as Ecocem are preparing to import them, ones like CRH are cornering existing stocks and others such as Fortera and Queens Carbon are working on creating their own ‘virgin’ sources. At the same time the American Cement Association has been promoting the use of Portland Limestone Cement in the country.

All this helps to explain the interest in SCMs in the US right now. It’s a busy moment.

Ireland: CRH reported second quarter 2025 sales of US$10.2bn, up by 6% from US$9.7bn in 2024, driven by acquisitions and commercial execution despite slowdowns due to inclement weather. Adjusted earnings before interest, taxation, depreciation and amortisation (EBITDA) rose by 9% year-on-year to US$2.5bn. Net income grew by 2% year-on-year to US$1.3bn.

CEO Jim Mintern said “Our strong second quarter performance was driven by favourable underlying demand, disciplined commercial management and further contributions from acquisitions. CRH's proven strategy continued to drive higher sales and profits, while our robust balance sheet and financial capacity enabled us to allocate approximately US$3bn to growth investments and capital returns year-to-date. We completed 19 acquisitions year-to-date and continue to see an active pipeline of opportunities to further strengthen our market-leading positions in attractive growth markets. Underlying demand in our key end-use markets remains positive and we are pleased to raise our guidance for 2025.”

France: Ireland-based Ecocem has obtained a Technical Evaluation of Products and Materials (ETPM) from the Centre Scientifique et Technique du Bâtiment (CSTB) for ACT1, the first iteration of its low-carbon cement technology. The ETPM certifies the mechanical performance and durability of concrete made with ACT1, confirming its compliance with European structural design codes.

The ETPM will support Ecocem’s planned submission for an Appréciation Technique d’Expérimentation (ATEx) in the second half of 2025, which will assess the use of ACT1 in structural applications such as walls, beams and foundations.

Director of product development and standardisation Christian Clergue said “To guarantee the swift deployment of our ACT technology in the French market, it was essential that Ecocem opted for the most relevant national technical assessments. This assessment provides clear evidence of ACT1’s workability, durability, safety and strength, demonstrating it is safe to use across the construction ecosystem.”

Ecocem received a European Technical Evaluation (ETE) for ACT in early 2024. Further iterations of ACT will be subject to similar assessments in France and the EU.

Ireland: Irish Cement (ICL) has opposed a planned 139-home development by Tergnum Properties in Mungret over concerns it could ‘inhibit’ its future expansion, according to the Limerick Leader newspaper. The company said “This planning application is not consistent with the proper planning and sustainable development of the area,” and has reportedly written twice to the local authority to express its concern. The company’s agents indicated that permission would be sought for its own expansion plan in the future, which could take its plant just 40m from the rear wall of some of the proposed houses. They also said that Tergnum Properties should implement measures such as triple-glazed windows, to mitigate against the noise from the plant.

Irish Cement has 14 days to decide if it will appeal the council’s decision or lodge an appeal to the national planning authority.

“It is imperative to ICL that its strategically important cement plant facility and associated proven long-term reserves are protected. It is not evident from this application that limestone resources and cement plant activities on the adjacent lands will not be impacted by the proposed development,” the firm’s agents concluded.

Ireland: CRH recorded total revenues of US$6.8bn in the first quarter of 2025, up by 3% year-on-year, and adjusted earnings before interest, taxation, depreciation and amortisation (EBITDA) of US$495m, up by 11%. However, it reported a net loss of US$98m, compared to a net income of US$114m in the first quarter of 2024.

The company said performance was driven by its ‘differentiated strategy’, positive pricing and acquisition contributions, with underlying demand across key markets remaining positive. CRH completed eight acquisitions for US$0.6bn during the period and reaffirmed its full-year 2025 guidance for a net income of US$3.7bn – 4.1bn and adjusted EBITDA of US$7.3bn – 7.7bn.

US: CRH has appointed Nancy Buese as its chief financial officer (CFO). She will be based in New York. She succeeds Alan Connolly in the post, who was working as interim CFO. Connolly will return to his previous role as Director of Strategic Finance in May 2025.

Buese previously worked as Executive Vice President and CFO at Baker Hughes Company and Newmont Corporation. She has also served as Executive Vice President and CFO at MarkWest Energy Partners and MPLX and was a partner at Ernst & Young. She is a graduate of the University of Kansas.

Ireland: Ecocem has secured €4m in research funding as part of the European Innovation Council’s Pathfinder Challenges 2024 in order to optimise electric arc furnace (EAF) slag for low-carbon cement production. The four-year programme is funded by Horizon Europe and will explore ways to enhance EAF slag reactivity and its suitability as a supplementary cementitious material without compromising cement durability. The project was submitted to the Pathfinder Challenge 2 call: “Towards Cement and Concrete as a Carbon Sink.”

Corporate development executive director Eoin Condren said “For many years, we have been pioneering the use of a range of slags and cementitious materials to create scalable and durable low-carbon cement. Thanks to this grant, we will continue our groundbreaking work as the steel industry transitions to new manufacturing processes, delivering a viable solution for a new generation of waste from steel.”

Ireland: CRH recorded a 2% year-on-year increase in sales to US$35.6bn in 2024, with net income rising by 15% to US$3.5bn during the period. The producer's earnings before interest, taxation, depreciation and amortisation (EBITDA) grew by 12% year-on-year to US$6.9bn.

In the fourth quarter of 2024, the company's sales rose by 2% year-on-year to US$8.9bn, while its net income increased by 24% to US$700m and its EBITDA by 12% to US$1.8bn.

CRH invested US$5bn in mergers and acquisitions during 2024. It maintains a positive outlook for the 2025 financial year, forecasting a net income of US$3.7 – US$4.1bn and an EBITDA of US$7.3 – US$7.7bn.

UK/Ireland: France-based Hoffmann Green Cement Technologies has launched a strategic licensing agreement with UK partner Cemblend, furthering its international expansion strategy. The deal builds on an existing partnership established in 2022 for the launch of Hoffmann’s 0% clinker cements, with the partners aiming to accelerate the decarbonisation of the construction sectors in the UK and Ireland. Under the terms of the agreement, Hoffmann Green will receive up to €2m in entry fees and annual royalties tied to the sales of Hoffmann cements and premixes. Cemblend will construct production units in the UK to support the rising demand for sustainable building materials.

Thomas Atkinson, international director of Hoffmann Green Cement Technologies, said “2024 marks a key period in Hoffmann Green's international development. After signing a strategic partnership in the US and strengthening our development in Saudi Arabia, this new licensing agreement provides us with ambitious new perspectives on the European market.”

Ireland: CRH has appointed Alan Connolly as its Interim Chief Financial Officer (CFO). The move follows the appointment of Jim Mintern, the current CFO, as Group CEO from January 2025. Recruitment is ongoing for a permanent CFO.

Connolly is a chartered accountant who holds over three decades of finance experience working at CRH. He has held several senior finance roles across the company’s European and Americas businesses. He most recently worked as the Director of Strategic Finance. Prior to this he was the Finance and Performance Director of Europe Materials, CFO of Global Building Products and Director of Group Finance. Before working for CRH, Connolly was an auditor at KPMG.