Displaying items by tag: supplementary cementitious materials

Asia Cement unveiled a selective catalytic reduction (SCR) unit at its Jecheon plant this week. The Korea Cement Association (KCA), government representatives and staff from other cement companies were present at a demonstration. The US$25m project has been supported by the Ministry of Industry and Trade. It was originally announced in late 2023, has been running on a pilot basis for two months, and is expected to start full operation shortly. The cement sector in South Korea will be subject to tighter emissions controls in mid-2027 and further SCR installations are expected.

Earlier in 2025 the KCA estimated that installing SCR units on all 35 active clinker production lines in the country would cost around US$675m with an additional annual running costs. One point to note here is that one of the local sector’s commonly used alternative fuels (AF), waste synthetic resin, impedes the SCR process. Subsequently, it has to be run at higher temperature, which increases running costs.

The local cement industry has faced a mixed response to its uptake of AF in recent years. One strand of this has been a movement against so-called ‘trash cement.’ This culminated in the Ministry of Climate, Energy and Environment amending the Waste Management Act in November 2025 to make it mandatory for cement products to disclose on the packaging the means to check which ‘waste’ materials were used in their manufacture. This appears to include both supplementary cementitious materials (SCM) and AF. The government is now intending to make it possible for citizens to check the type of cement used in newly-constructed buildings. The KCA reported that the share of blended cements (i.e. those made with SCMs) was 15% in 2024. The rate had gradually decreased over the last decade from 19% in 2015. South Korean cement producers had a AF co-processing rate of 35% in 2021. The main fuels being used in this way were waste synthetic resin, waste tires and waste rubber, with the first being used the most.

Graph 1: Cement sales in South Korea, 2019 - 2025. Source: Korea Cement Association.

Meanwhile, cement producers in South Korea have turned to exports in 2025 in response to poor construction levels and growing input costs. The KCA revealed this week to local press that exports are expected to grow by 52% year-on-year to 4.5Mt in 2025 from 3Mt in 2024. Local shipments, however, are anticipated to fall by 16.5% to 36.5Mt from 42.9Mt. Producers have focused their export strategies towards South America and Africa in response to competition in the export market in South-East Asia from China and Vietnam, producers. For example, Halla Cement started targeting Cameroon and Guinea in 2025 following previous favourite destinations such as Peru and Chile. Exports are still lower than they were in the mid-2010s. In 2015, for example, the country exported 7.3Mt of cement and clinker. However, the share of the share of exports to total sales is at its highest level for at least a decade.

The necessity of running kilns at certain levels rather than simply idling them has also emerged in recent reporting. The reason given was to “...maintain a minimum allocation of carbon emission allowances.” The detail is lacking but this may sound familiar to readers familiar with the European Union (EU) Emissions Trading Scheme (ETS). Following the financial crash in 2008, for example, an over-allocation of carbon credits enabled some producers to make money despite falling demand for cement. This is not to say that the same thing is happening in South Korea. Merely, that any ETS can potentially face structural issues in a declining market.

The South Korean cement market is facing tough times, with the KCA further anticipating a decline of 1.3% in 2026. Environmental regulations such as the new emissions controls are further putting up costs. One peculiarity of the local market is the scrutiny that the easiest routes to decarbonisation, SCAs and AFs, are facing. Giving the public the tools to check this kind of information is admirable. Yet it creates extra hurdles for a sector trying to decarbonise at the same time as a construction market construction. Good luck!

The Global CemFuels Asia Conference will take place on 2 - 3 February 2026 in Bangkok

Canada: Progressive Planet Solutions has launched a new supplementary cementitious material (SCM) called Gladiator SCM. The company developed Gladiator SCM using its PozGlass recycled glass-based SCM with other more abundant materials. The company says that it has supplied a sample to a global cement producer for evaluation.

Australia: Zeotech has executed a non-binding memorandum of understanding (MoU) with Cement Australia to exchange information and conduct testing for the company’s AusPozz high-reactivity metakaolin product. The collaboration will assess AusPozz’s technical performance and value, alongside evaluating Cement Australia’s infrastructure and supply chain options, with the aim of advancing its commercialisation.

Cement Australia general manager sales, marketing and risk Phil Halpin said “Cement Australia is pleased to enter this arrangement with Zeotech. The company’s high-grade kaolin has strong potential as a viable feedstock for producing high-reactivity metakaolin. Our planned technical assessment of AusPozz will focus on validating its performance as a supplementary cementitious material (SCM) for low-carbon concrete applications. In parallel, Cement Australia will undertake a detailed evaluation of the infrastructure and end-to-end supply chain requirements.”

Zeotech executive director Shane Graham said “We are pleased to be partnering with one of Australia’s largest suppliers of building materials. The MoU provides a framework for ongoing collaboration aimed at accelerating the development of AusPozz and evaluating pathways toward commercial-scale production. This partnership represents an important step in supporting the decarbonisation of the built environment through the development of high-performance, low-carbon construction materials.”

US: CRH has finalised its US$2.1bn acquisition of supplementary cementitious materials (SCM) supplier Eco Material Technologies. CRH previously announced the agreement on 29 July 2025. It said that the acquisition is expected to ‘unlock significant future growth opportunities.’

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.

US: Ecocem has obtained ASTM C1157 certification for its ACT low-CO₂ cement technology, confirming it meets or exceeds strength and durability benchmarks while reducing emissions and energy use. Unlike traditional cement specifications, the standard is performance-based, allowing for innovative formulations.

Founder and group managing director Donal O’Riain said “This is a significant moment for Ecocem and for low-carbon cement globally. Over the past 10 years our solutions have seen significant traction across Europe. 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 through improved efficiency and without increasing costs or complexity.”

Ecocem is advancing its first North American project, a proposed terminal and milling operation at the Port of Los Angeles, aimed at establishing a reliable low-CO₂ cement supply chain in California. The company says that its low-carbon cement technology, ACT, cuts clinker content by up to 70% by using limestone and locally-sourced supplementary cementitious materials. The announcement follows recent regulatory approvals in France, new investment in production lines in Dunkirk, and partnerships with Bouygues, Vinci and Titan Group.

US: Supplementary cementitious materials (SCM) producer Eco Material Technologies has published its 2024 Sustainability Report, detailing the measures it has employed to reduce its environmental impact over the year. The producer said that its SCM displaced 5% of US cement consumption, avoiding 5.5Mt of CO₂ emissions. The company diverted 6.2Mt of ash from landfill and harvested a further 0.5Mt, reducing water use by 7.57bn litres compared to conventional materials. It produced 73,292t of ‘green’ cement, avoiding over 65,000t of CO₂, and aims to double recycled material use to 20Mt by 2030.

Chief executive officer Grant Quasha said “We're proving that domestic fly ash is not only a powerful climate solution, but also a resilient and scalable one. The infrastructure transformation is already underway, and we're proud to be leading it.”

Eco Material Technologies operates 125 sites in 42 states and employs 1100 people.

US: Amazon and Brimstone have announced successful third-party test results for Brimstone’s lower-CO₂ ordinary Portland cement (OPC), which meets ASTM C150 requirements using Amazon slab mix designs. The companies will continue testing through 2025 and 2026. On the basis of the successful tests, Amazon has signed a commercial agreement to reserve annual volumes of OPC and supplementary cementitious materials from Brimstone’s upcoming plant in Oakland, California.

US: CRH has announced that it has signed an agreement to acquire Eco Material Technologies, a leading supplier of supplementary cementitious materials (SCM) in North America, for a total consideration of US$2.1bn. The business will subsequently operate as Eco Material Technologies, a CRH Company. CRH says that the deal positions it to meet growing demand for cementitious products for the modernisation of North America’s infrastructure and that it secures a long-term supply of critical materials in the region.

Eco Material is headquartered in Utah and operates a national network of fresh and harvested fly ash, pozzolans, synthetic gypsum and ‘green cement’ operations across a network of over 125 stockpiles, production facilities and terminals. The company partners with electric utilities to process and recycle approximately 7Mt/yr of fly ash and 3Mt/yr of synthetic gypsum and other materials, with additional capacity currently under construction.

The proposed transaction is subject to regulatory approval and customary closing conditions and is expected to close in 2025. CRH plans to fund the transaction with cash on hand and does not expect any change in its credit ratings.

Titan Group announced this week that it will build a processing and beneficiating unit for fly ash at Warrington in the UK. The move marks both a trend in fly ash projects in the UK recently and Titan’s own focus in the country.

Titan has struck a deal to use ponded fly ash at the former Fiddler’s Ferry power station in the North-West of England. It aims to process 300,000t/yr of wet fly ash from 2027 onwards with the option to double this capacity if desired. The processed fly ash will meet the BS EN 450 standard for subsequent use in cement or concrete. Crucially, Titan intends to use the technology of its subsidiary, ST Equipment & Technology (STET). This company has a proprietary dry electrostatic process that it uses for fly ash beneficiation. Titan acquired STET in 2002. It says its process is being used at 12 power stations in the US, Canada, the UK, Poland, and South Korea. The project at Fiddler’s Ferry will be the 20th fly ash project developed with STET technology.

Titan has not commented on the specifics of its arrangement with site-owner PEEL Group other than to describe it as a ‘long-term agreement.’ It currently operates a terminal in Hull, on the other side of the country, 160km from Warrington. As for Fiddler’s Ferry, the coal-fired power plant closed in 2020. Prior to this though RockTron Group built a 800,000t/yr unit at Fiddler’s Ferry to process both ‘fresh’ and stockpiled fly ash in the late 2000s. Unfortunately the company entered administration in 2013. Later, Power Minerals was reportedly selling fly ash from the plant at the time that its closure was announced in 2019. A report commissioned by consultants Arcadis for the local council reported that ash including pulverised fuel ash (PFA) was present in the lagoons at the site.

Other companies have also been looking at the fly ash market in the UK. Invicta, a joint venture between Türkiye-based Medcem and Brett Group opened a terminal at Sheerness in Kent in 2024 to import PFA and cement. In April 2025 a ship unloader supplied by Van Aalst was delivered to the port. Then in May 2025 it was announced that Mecem is planning to build a terminal in Liverpool to import cement and supplementary cementitious materials (SCM), such as fly ash and granulated blast furnace slag. The terminal will have a combined storage capacity of 45,000t in four silos in its initial phase and is scheduled for completion in mid-2026. Meanwhile, the Drax power station said in March 2025 that it had signed a 20-year joint venture agreement with Power Minerals to process legacy PFA. A unit at the now biomass power plant in Yorkshire is scheduled to start by the end of 2026 with an initial production capacity of 400,000t/yr.

The background to this interest in fly ash in the UK appears to be a local cement sector struggling with high energy costs and low capacity-utilisation rates. Reports in local media in late June 2025 cited preliminary estimates that cement output may have reached an ‘all-time low’ in 2024. High electricity prices were blamed for the situation by the Mineral Products Association (MPA) and it warned of mounting imports from the EU and North Africa. All of this was timed to coincide with a release of a new Industrial Strategy by the UK government. For more on the UK cement sector in general see Global Cement Weekly in May 2025 and Edwin Trout’s feature in the June 2025 issue of Global Cement Magazine.

Readers will be aware of the growing attractiveness of SCMs for cement and concrete production for both cutting costs and meeting sustainability goals. A report by McKinsey on SCMs for the cement sector in late 2024 forecast that SCMs and fillers in Europe could represent an emerging value pool that could reach €8 – 10bn in 2035 as the price of cement steadily rises. The SCMs being used are likely to change as sources of industrial SCMs such as slag and ash dwindle and others such as clays, pozzolans or limestone become more available. The UK may have closed its last coal-powered power plant in 2024 but ash from ponds can still be reclaimed or ash can be imported if the economics makes sense. Recent investments by Titan, Medcem and Power Minerals suggest that the price is indeed right. The interest of two major cement exporting companies amongst the three names above also indicates changing market dynamics. Expect more of these kinds of deals and investments in the UK, Europe and elsewhere in coming years.