Displaying items by tag: Ecocem

Cement and concrete products with sustainability credentials have increased in recent years as societies start to demand decarbonisation. In spite of the recent drop in the European Union (EU) Emissions Trading Scheme (ETS) price, there has been a trend in recent years in the construction industry towards offerings with better environmental credentials. Indeed, this week’s position paper from Cembureau on a carbon border mechanism concerns directly the growth of these kinds of products within Europe. Typically, the higher profile projects have been slag cement or concrete implementations such as Hanson’s use of its Regen cement substitute in a London sewer project or David Ball Group’s Cemfree concrete in a road project also in the UK. In this short review we’ll take a selective look at a few of the so-called low carbon cement and concrete products currently available.

Table 1: Some examples of methods to reduce embodied CO₂ in cement and concrete. Note - the product examples are selective. In some cases many other products are available.

Looking at cement first, the easiest way for many producers to bring a lower carbon product to market has been to promote cements made using secondary cementitious materials (SCM) such as granulated blast furnace slag or fly ash. These types of cements have a long history, typically in specialist applications and/or in relation to ease of supply. For example, cement producers in eastern India often manufacture slag cements owing to the number of local steel plants. However, cement producers have more recently started to publicise their environmental credentials as they reduce the clinker factor of the final product. Alongside this though, in Europe especially, a number of so-called low carbon cement producers have appeared on the scene such as EcoCem and Hoffman Green Technologies. These newer producers tend to offer SCM cement products or other low carbon ones built around a grinding model. It is likely that their businesses have benefitted from tightening EU environmental legislation. How far cement producers can pivot to SCM cement products is contentious given that slag and fly ash are finite byproducts of other industries that are also under pressure to decarbonise. Although it should be noted that other SCMs such as pozzolans exist.

As will be seen below a few of the methods to reduce embodied CO₂ in cement and concrete can be used in both materials. SCMs are no exception and hold a long history in concrete usage. As mentioned above David Ball Group sells Cemfree a concrete product that contains no cement. Harsco Environmental, a minerals management company, invested US$3m into Carbicrete, a technology start-up working on a cement-free concrete, in late 2019.

Limestone calcined clay cements are the next set of products that are starting to make an appearance through the work of the Swiss-government backed LC3 project, more commercial offerings like FutureCem from Cementir and H-EVA from Hoffman Green Technologies and today’s announcement about ThyssenKrupp’s plans to fit the Kribi cement plant in Cameroon with its Polysius activated clay system. They too, like SCM cements, reduce the clinker factor of the cement. The downside is that, as in the name, the clay element needs to be calcined requiring capital investment, although LC3 make a strong case in their literature about how fast these costs can be recouped in a variety of scenarios.

Calcium silicate cements offer reduced process emissions by decreasing the lime content of the clinker lowering the amount of CO₂ released and bringing down the temperature required in the kiln to make the clinker. Solidia offers its calcium silicate cement as part of a two-part system with a CO₂ cured concrete. In the US LafargeHolcim used Solidia’s product in a commercial project in mid-2019 at a New Jersey paver and block plant. Solidia’s second core technology is using CO₂ to cure concrete and reducing water usage. They are not alone here as Canada’s CarbonCure Technologies uses CO₂ in a similar way with their technology. In their case they focus more on CO₂ mineralisation. In Germany, Schwenk Zement backed the Celitement project, which developed a hydraulic calcium hydro silicate based product that does not use CO₂ curing. Celitement has since become part of Schwenk Zement.

Solidia isn’t the only company looking at two complementary technologies along the cement-concrete production chain. A number of companies are looking at recycling concrete and demolition waste. Generally this splits into coarse waste that is used as an aggregate substitute in concrete and fine waste that is used to make cement. LafargeHolcim has Evopact for the coarse waste and Susteno for the fine. HeidelbergCement has EcoCrete for the coarse and is researching the use of fines. Closing the loop for heavy building material producers definitely seems like the way to go at the moment and this view is reinforced by the involvement of the two largest multinational producers.

Of the rest of the other low carbon cement methods detailed in table 1 these cover other non-Ordinary Portland Cement (OPC) such as geopolymer and calcium sulphoaluminate cements. The former are a type of alkali activated binder and generally lack common standards. The latter are similar to slag cements in that they are established specialist products with lower CO₂ emissions than OPC.

With concrete when trying to make a low carbon product the first choice is whether to choose a low-carbon cement as the binder or even not to use cement at all in the case of Regen or Cemfree. From here the next step is to simply use less cement in a concrete mixture. There are a number of ways to do this from optimising aggregate gradation, following performance specifications more closely, using strength tests like maturity methods and generally adhering to quality control protocols better to deliver more consistency. Read the Mineral Production Association (MPA) publication Specifying Sustainable Concrete for more detail on this. Using concrete admixtures can also help make concrete more sustainable by improving quality and performance at construction sites through the use of plasticisers and accelerators, by decreasing embodied carbon through the use of water reducers and by improving the whole life performance of concretes. The use of locally-sourced aggregates is also worth noting here since it can reduce associated transport CO₂ emissions.

More novel methods of reducing embodied CO₂ emissions in concrete include the use of geopolymer concrete in the case of Zeobond Group’s E-Crete or adding graphene as Concrene does. Like geopolymer cements, geopolymer concretes are relatively new and lack common standards. Products like Concrene, meanwhile, remain currently at the startup level. Finally, if all else fails, offsetting the CO₂ released by a cement or concrete product is always an option. This is what Cemex has done with its Vertua Ultra Zero product. The first 70% reduction in embodied CO₂ is gained through the use of geopolymer cement. Then the remaining 30% reduction is achieved through a carbon offsetting scheme via a carbon neutral certification verified by the Carbon Trust.

As can be seen, a variety of methods exist for cement and concrete producers to reduce the embodied CO₂ of their products and call them ‘low-carbon.’ For the moment most remain in the ‘novelty section’ but as legislators promote and specifiers look for sustainable construction they continue to become more mainstream. What has been interesting to note from this short study is that some companies are looking at multiple solutions along the production and supply chain whilst others are concentrating on single ones. The companies looking at multiple methods range from the biggest building material producers like LafargeHolcim and HeidelbergCement to smaller newer ones like Solidia and Hoffman Green Technologies. Also of note is that many of these products have existed already in various forms for a long time like SCM cements and concretes or the many ways concretes can be made more sustainable through much simpler ways such as changing aggregate sourcing or working more efficiently. In many cases once markets receive sufficient stimulus it seems likely that low carbon cement and concrete products will proliferate.

Global Cement is researching a market report on low carbon cement and concrete. If readers have any comments to make please contact us at This email address is being protected from spambots. You need JavaScript enabled to view it.

Ireland: Ecocem Ireland has appointed Susan McGarry as its managing director. Previously she held a variety of roles with the company including the positions of European Sustainability Manager, Environmental Manager and Technical Development Manager. Prior to this she was a lecturer at the Technological University Dublin. McGarry trained as a civil engineer and holds a master’s degree in engineering management.

Ireland: Ecocem Ireland has appointed Annemarie Harte as managing director of its Irish business. She succeeds Micheál McKittrick, who is moving to a new post as Ecocem’s managing director for Northern Europe with the responsibility for the Irish, UK and Benelux markets.

Harte was previously the chief executive officer (CEO) of Hardware Association Ireland, a representative body for hardware and DIY retailers, builders merchants, and manufacturers and distributors. She has also held a number of other senior roles, including consultant with the Royal Life Saving Society, CEO of Rotary International and manager of Dun Laoghaire Rathdown Chamber of Commerce.

Ireland: Ecocem Materials’ turnover rose by 9.4% in 2017 to Euro79.4m from Euro72.6m in 2016. Pre-tax profit fell by 37.5% to Euro2.5m from Euro4m in 2016, as its costs rose by 12% to Euro76.5m from Euro68.6m.

Ecocem makes cement using waste from steel slag. The company has its head offices and a factory in Dublin, as well as businesses in the UK, France and the Netherlands. It is looking to expand into the US, although its subsidiary Orcem Americas has come up against stiff resistance from environmental groups in San Francisco.

Hillhead 2018 is on this week and where better to capture a feel of the UK’s quarrying and construction industries? For those that don’t know, Hillhead is a biennial show that takes place in a quarry in Derbyshire. The show bills itself as the largest quarrying, construction and recycling event in the world. A large scale UK show gives us the opportunity to look at the local cement industry and we did exactly that in the June 2018 issue of Global Cement Magazine with Edwin Trout’s feature on the UK cement sector in 2017 and 2018. Following on from that article we’ll pick up a few threads.

Graph 1: Domestic cement production in the UK, 1996 - 2016. Source: Mineral Products Association (MPA).

Cement production in the UK fell by 5Mt/yr during the financial crisis of 2007 - 2008. Since then, as Graph 1 shows, production has been growing almost uniformly. However, it may have reached a plateau in 2017, with the major producers complaining about a weakened market due to Brexit uncertainty.

Main points from a news angle are the rise of the Breedon Group with its acquisition of Ireland’s Lagan Cement in April 2018, investments at Hanson’s Padeswood cement plant and Tarmac’s Dunbar cement plant and a fairly static market reported by the major producers. Alongside this, Ireland’s Ecocem opened a terminal in Sheerness in June 2017 and, more recently, has just inaugurated its slag grinding plant on the other side of the English Channel at Dunkirk.

The decision by Breedon to straddle an impending UK-European Union (EU) border seems wise with Hanson’s parent company HeidelbergCement actively blaming Brexit for market uncertainty in the UK. The rise of Ecocem, a slag cement grinder and distributor, also seems to suit the atmosphere with its smaller, more nimble operation than a clinker producer. It’s into this situation that Hanson is reusing a mill from Spain for its Padeswood project and Tarmac is buying its mill from Cemengal, a manufacturer known for making modular mills that can be moved after installation if so desired.

Banging on about Brexit, and indeed Brexit uncertainty, can’t last forever and once clarity appears then the building industry can focus on various pressing issues. One is the country’s lack of residential housing supply. One possible solution for this is a new national planning policy. The government finished a consultation period in May 2018 for the National Planning Policy Framework (NPPF) and industry bodies like the Mineral Products Association (MPA) have been making their views known. The MPA worries that that the proposed changes will weaken the mineral planning system and threaten the replenishment of aggregate and other mineral reserves. It argues that to secure the essential minerals required to build all those new houses the government needs an, “...efficient and effective mineral planning system with up to date plans, well-resourced planning departments and good data, which are prerequisites, as is appropriate capacity and capability in the ministry to ensure the system is planned, monitored and managed.” Detractors may point out that once the NPPF gets sorted we can all get on with the job of actually, like, building things but, as ever, the MPA has its part to play in the process.

Another indicator for the resumption of ‘business as normal’ might be the number of exhibitors at a trade show like Hillhead. The oranisers say that the exhibitors have grown by 10% in 2018 from 2016. With a heatwave forecast, the group stages of the football World Cup continuing and live demonstrations ongoing there are worse places to be to ponder the state of the industry. Come and find Global Cement at our stand (PC45) in the main pavillion at Hillhead 2018 and tell us what you think.

France: ArcelorMittal plans to increase its stake in Ecocem France to 49% from 30% by the end of May 2018. The transaction is subject to the approval of the Irish Competition Authority. The French subsidiary of Ireland’s Ecocem was set up in 2007 by ArcelorMittal and Ecocem Materials.

Ecocem produces slag cement from ground granulated blast furnace slag. Ecocem France operates a 0.7Mt/yr grinding plant at Fos-sur-Mer near to an ArcelorMittal plant. It plans to open a second 0.7Mt/yr grinding plant at Dunkirk in May 2018. The new plant is intended to target western and northern France as well as export markets in the UK and Belgium.

UK: Ecocem Ireland has officially opened its import terminal at Sheerness. The company’s second terminal in the UK is set to supply the construction market in the southeast and London. The unit cost is Euro2.9m to build and it will be able to supply the market with 250,000t/yr of the company’s slag cement products.

It follows the opening of Ecocem’s terminal at Runcorn in early 2016 and it joins facilities in the Ireland, the Netherlands and France.

“Our second investment into the UK in a state of the art import facility demonstrates to the market the need for the low carbon cement alternative and the growing demand from the UK construction industry. We have already engaged in long term agreements with major concrete manufacturers in the UK and will continue to build momentum in the coming months,” said Micheál McKittrick, the managing director of Ecocem Ireland.

Ireland: The Times has reported that financier Dermot Desmond is believed to have taken a stake in Ecocem Materials, the fast-growing low-carbon cement maker founded by Irishman Donal O'Riain and backed by French construction materials giant Saint-Gobain. It is understood that IIU, Desmond's private equity company, moved in recent weeks to acquire as much as 11% of the company.

Founded in 2003, Ecocem manufactures cement from granulated blast-furnace slag, a byproduct of steel production. The company had sales of Euro63m in 2015, according to its most recent accounts.

Ireland: Ecocem Ireland has appointed Micheál McKittrick as its Managing Director for Ireland and the UK. His role involves the management of all aspects of the Irish and UK operations. McKittrick is a Chartered Engineer and graduate of Trinity College Dublin. He previously worked in several senior roles with Atkins Consulting Engineers.

US: Orcem Americas, a subsidiary of Ireland’s Ecocem, has been refused planning permission to build a slag cement plant in Vallejo, California. The cement producer was hoping to build a US$50m grinding plant but it faced opposition from local residents on environmental grounds, according to the Irish Times. The issues for the planners was an anticipated increase in the number of trucks on local roads and pollution from the plant. Orcem Americas can now appeal the decision to Vallejo’s City Council if it chooses.