Displaying items by tag: Hoffmann Green Cement Technologies

There were mixed feelings evoked by HeidelbergCement’s good news last week that its French subsidiary Ciments Calcia is to set to spend Euro400m on a modernisation project. Sadly, this came with the bad news that the integrated plants at Gargenville and Cruas will be downgraded into a grinding plant and a terminal respectively, and there will be a review of the company’s headquarters in Guerville. All of this will cut 160 jobs but create 20 new ones.

Make no mistake, this is serious money to invest. Euro300m alone will go towards an upgrade of the integrated Airvault cement plant in the former Poitou-Charentes administrative region. HeidelbergCement didn’t say it in its press release but French press reported that the pyroprocessing line at Airvault will be rebuilt starting in 2022 with commissioning scheduled for 2025. If correct then this certainly suits an investment on this scale for a single plant. Smaller investments in the region of Euro25 – 50m were also said be earmarked for the integrated plants at Bussac-Forêt, Beaucaire and Couvrot. These are serious commitments to HeidelbergCement’s production base in France.

Generally speaking, the French cement and construction market has done as well as expected for a country forced to implement two coronavirus lockdowns so far in 2020. Half-way through the year the major cement producers were reporting sales declines of around 10% year-on-year with business picking up again over the summer. Vicat, for example, reported a 9% fall in sales volumes in the first half followed by ‘solid business growth’ in June 2020. LafargeHolcim, CRH and HeidelbergCement all reported a similar situation for their local subsidiaries.

Looking at the wider construction industry, in October 2020 analyst company GlobalData stuck by its forecast of a contraction of construction output by 11.6% in France in 2020. It noted a 35.5% quarter-on-quarter rebound in the third quarter, although it reckoned output was still down by around 5% in the quarter year-on-year, using French National Institute of Statistics and Economic Studies (INSEE) data. With a second national lockdown initiated in late October 2020, it said that INSEE expected a contraction in the fourth quarter of 2020 even with construction sites being allowed to stay open. This follows a peak of cement production above 20Mt in the late 2000s before hitting a low of around 15.5Mt in 2015 and a gradual recovery since then, according to data from the French cement industry union (SFIC).

Ciments Calcia’s upgrade at Airvault is noteworthy for the whole of Europe because it is one of only a few new pyroprocessing line projects in the last decade. The last major one was the new 4000t/day line at HeidelbergCement’s Burglengenfeld plant in Germany that was commissioned in 2018. The trend since then has generally been one of integrated plants slowly closing as markets shrank following the 2008 financial crisis, international clinker levels boomed and environmental measures tightened. Dominik von Achten, chairman of the managing board of HeidelbergCement, addressed this last point directly with the announcement of the Airvault project when he said, “This is why we focus our initiatives on the main CO₂-emitting plants in France.” The competitors to the larger established cement producers in France are certainly thinking about CO₂. Alongside the general European trend of fewer new clinker production lines has been rise in France of the smaller cement producers with grinding and/or reduced-clinker factor models like Cem’In’Eu, Hoffmann Green Cement Technologies and Ecocem. Anyone spending Euro300m on a clinker kiln spewing out CO₂ would do well to consider how much the CO₂ price might be in fifty years time.

France: Social housing developer Immobilière 3F says that it has signed a contract with construction company Groupe GCC for the use of Hoffmann Green Cement Technologies' 78% reduced-carbon dioxide (CO₂) emissions concrete for the construction of an 85-unit housing project in Saint-Leu-la-Forêt, Île-de-France.

Groupe GCC says that it participated in the development of the concrete as part of a three-year development partnership agreement with Hoffmann Green Cement Technologies signed in July 2020.

France: Hoffman Green Cement Technologies recorded a net loss of Euro 4.41m in the first half of 2020, up by 320% year on-year from a loss of Euro1.04m in the first half of 2019. Its revenues nearly tripled to Euro96,000 from Euro33,000.

Co-founders Julien Blanchard and David Hoffman said, “The first half of 2020 was very active, notably on the industrial and commercial fronts. We continued our actions in all of our strategic areas under sometimes delicate conditions as a result of the Covid-19 pandemic. The rollout of our industrial plan is progressing in line with our objectives. We have used this period to integrate additional resources that will enable us to accelerate our development in the coming months and years.” They added, “Thanks to the recent resumption of building sites activity and more generally of the construction sector, we have been able to reactivate our commercial negotiations and have signed a number of new contracts since July 2020.”

France: Hoffmann Green Cement Technologies has announced the signing of a supply contract with precast concrete structural engineers CAPREMIB. It says that the contract covers the supply of a minimum volume of low-carbon cement for the production of wooden concrete sound barriers for use in stadia and public spaces such as underground stations.

Co-founders Julien Blanchard and David Hoffman said, “We are delighted to have signed this contract with CAPREMIB, a highly innovative player in the construction sector. This partnership follows months of technical tests, and will allow the CAPREMIB group to produce wooden concrete acoustic screens with a lower carbon footprint. Combining wood and concrete in the manufacturing of this type of product meets market expectations and illustrates our ability to continually increase the growing number of applications for our technologies.”

France: Hoffmann Green Cement Technologies has appointed François de Gliniasty as Technical and Commercial Promoter for the Ile-de-France region. The 45-year old holds over 25 years of experience in sales, marketing and logistics. He began his career at Lapeyre, part of Saint-Gobain Group, in sales and was then Logistics Manager from 2000 to 2005. He was then appointed as the Lapeyre Group’s Organizations Manager for the Rhône-Alpes and Provence-Alpes-Côte d’Azur regions of southeast France. Since 2008, he has been in charge of sales development for the Paris region at WEDI France.

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.

France: Hoffman Green Cement Technologies, a pioneer in low-carbon cement production, has announced the publication of its Life Cycle Inventories (LCI) in the INIES database, France’s national reference database for environmental and health performance in the construction sector.

The LCI published by Hoffmann Green summarises all incoming and outgoing flows of raw materials and energy resources used to manufacture its H-UKR and H-EVA cements to allow an assessment of the environmental impacts. They will serve as input data for the software that carries out the life cycle analysis of a construction product, often comprising several materials.

H-UKR is a binder that is based on alkali-activated blast furnace slag, which is sold into the precast concrete, ready-mix concrete and bagged cement markets. H-EVA is a high ettringite binder that is used in the mortar, coatings, road binder and ready-mixed concrete markets.

Julien Blanchard and David Hoffmann, the company’s founder’s stated, "The publication of the LCI of our cements is a first in France and is part of our determined ambition to decarbonise the construction sector and be fully transparent vis-à-vis all our stakeholders. It also illustrates our commitment in the face of the climate change emergency and the need to reconcile cement and the environment.”

France: Hoffman Green Cement Technologies has launched an initial public offering (IPO) to raise Euro50m on the Euronext Growth market. The company wants to use the funds to build two new plants with a capacity of 0.25Mt/yr in Vendée and in the Paris region, according to the Le Figaro newspaper. Hoffmann Green Cement Technologies inaugurated its pilot plant at Bournezeau, Vendée in 2018. The unit is developing cement products using flash-calcined metakaolin and blast-furnace slag.

France: Hoffmann Green Cement Technologies and Bouygues Construction have signed a 30-month initial technical and commercial collaboration agreement to develop and test concrete formulations using new cement made from Hoffmann’s H-EVA technology. Hoffmann Green Cement inaugurated its pilot plant at Bournezeau, Vendée in late 2018. The unit will manufacture cement products using flash-calcined metakaolin and blast-furnace slag. Bouygues Construction is a global construction company with a presence in over 60 countries.

France: Hoffmann Green Cement Technologies has inaugurated its pilot plant at Bournezeau, Vendée. The 50,000t/yr unit will manufacture cement products using metakaolin and blast-furnace slag, according to the L'Usine Nouvelle magazine. It says it will produce cement with reduced CO₂ emissions up to 250kg/t using a flash-calcined process down from 900kg/t in the normal clinker production process. The project had investment of Euro10m.