Displaying items by tag: Sustainability
Opterra Karsdorf cement plant awarded Nature and Biodiversity Conservation Union plaque
17 June 2020Germany: The Nature and Biodiversity Conservation Union (NABU) has awarded a placard to Opterra’s 2.3Mt/yr integrated Karsdorf plant, declaring that a multi-purpose facility at the plant in Saxony-Anhalt is a “martin-friendly house.” The company says that the building is the first industrial facility to receive the accreditation, after becoming the home to 60 breeding pairs of house martins. Opterra Karsdorf head of mining Axel Horn said, “For us, active environmental and biodiversity protection means protecting and respecting nature, even during limestone extraction. Animals and plants established here will find ideal living conditions.”
Cemex UK lobbies for sustainable development
16 June 2020UK: Cemex has joined the Aldersgate Group alliance of companies in calling on the UK government to support an economic recovery, “aligned with the UK’s climate and environmental goal.” In a policy briefing, the Aldersgate Group said that a low-carbon recovery plan should: address regional inequality and unemployment; strengthen the UK’s economic competitiveness and productivity through investment in the sectors and technologies of the future; deliver critical public goods including clean air, better health and improved resilience to future environmental shocks; build a more resilient financial system fit to withstand future climate shocks ;deliver the Global Britain agenda by strengthening the UK government’s influence ahead of the G7 and COP26 summits that it will be hosting in 2021; and enable UK businesses to be competitive providers of low carbon goods and services.
Cemex Europe director of public affairs Martin Casey said, “Our aim is to enable the development of climate-smart urban projects, sustainable buildings and climate-resilient infrastructures. Setting a clear policy direction for restarting the economy will enable to play its part in the recovery in a way that advances our climate and environmental goals.”
South Korea: All nine domestic cement producers and the Ministry of Environment have agreed on measures to reduce NOx emissions. Asia Cement, Halla Cement, Hanil Cement Manufacturing, Hyundai Cement, Korea Cement, Sampyo Cement, Ssangyong Cement Industrial, SungShin Cement and Union Corporation have agreed to invest in upgrades to filters or new high-efficiency filters and process improvements, according to the Korea Times newspaper. There was also an agreement to set NOx emissions reduction targets for the allocation of funding. The Korea Environmental Industry Technology Institute is investing US$2.93m in research towards developing methods of selective catalytic NOx emissions reduction and selective non-catalytic NOx emissions reduction.
The government aims to reduce national NOx emissions by 20% to 155,000t/yr from 195,000t/yr through subsidies to emissions reduction technologies development and uptake. The cement sector presently emits 62,500t, 32% of the domestic total.
Tarmac to electrify van fleet
09 June 2020UK: Tarmac says that it is the first cement company to have signed up to the EV100, a scheme that targets net-zero carbon emissions in transportation. Under the initiative, Tarmac will replace its fleet of 2000 corporate cars and vans with electric models by 2030.
Tarmac procurement director Jonathan Harry said, “We are fully committed to supporting the UK’s ambition of net-zero carbon emissions by 2050 and have been proactive in making significant changes to our business and product portfolio for many years. The road to a reduction in carbon requires collective action and sustainable procurement strategies have an important role to play in supporting these ambitions. By taking progressive actions such as adopting electric vehicle (EV) technology and switching to clean electricity, we can lead by example and begin to effect real change.”
UK: Breedon Group has appointed Donna Hunt as its first Group Head of Sustainability. In the newly-created role, she will be responsible for developing and implementing a sustainability strategy to shape the group's practices and performance, ultimately improving the sustainability of Breedon's operations, products and services.
Hunt holds over 20 years' experience having held several senior sustainability, environmental and stakeholder engagement positions across the energy, aerospace engineering and construction materials sectors. She has served on several cross-industry committees on sustainability-related topics and remains an active STEM (Science, technology, engineering, and mathematics) Industry Ambassador on behalf of the Mineral Products Qualifications Council (MPQC).
Switzerland/US: LafargeHolcim has announced the extension of its partnership with Solidia Technologies to mid-2020. Cash News has reported that the partnership, which has seen a 30% reduction in LafargeHolcim’s overall CO2 emissions since its formation in mid-2013, aims to achieve a 70% reduction in the producer’s carbon footprint.
Cemex is an Energy Star Partner of the Year 2020
28 April 2020US: The Environmental Protection Agency (EPA) has declared Cemex USA an Energy Star Partner of the Year, the highest award for energy-efficient production in the US. Cemex USA President Jaime Muguiro said, “Sustainability is embedded in our day-to-day operations and is an integral part of our core business strategy. Energy conservation is part of our vision as we are building a better future and believe it’s our responsibility to vigorously practice energy management through on-going initiatives and the use of alternative fuels.”
Cemex USA has earned more than 50 Energy Stars since 2007.
Titan Cement publishes integrated annual report
15 April 2020Greece: Titan Cement has published its integrated annual report for 2019, a year in which its net profit fell by 5.5% year-on-year to Euro50.9m from Euro53.8m in 2018 and sales rose by 8.0% to Euro1.61bn from Euro1.49bn. The company noted its ‘sustained performance and stronger cash flow generation’ throughout the year, with growing demand in the US and Southeastern Europe and the beginning of growth in Greece, in spite of a 7.0% year-on-year fall in cement volumes to 17.0Mt from 18.2Mt in 2018. Challenging conditions in Egypt and Turkey caused the group’s performance to deteriorate.
Titan Cement said that it is ‘on track to meet the Group’s 2020 sustainability targets and has already met ‘all targets related to emissions and water consumption.’ It acknowledged inevitable ‘short-term impacts’ of coronavirus, including reduced sales volumes ‘particularly and more severely in the second quarter of 2020,’ and has strengthened its liquidity position to Euro400m.
A short look at low carbon cement and concrete
01 April 2020Cement 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.
Material | Type | Method | Product examples |
Cement | SCM cement | Lower clinker factor | Many products |
Cement | Limestone calcined clay cement | Lower clinker factor | LC3, FutureCem, Polysius activated clay, H-EVA |
Cement | Calcium silicate cement | Reduced process emissions | Solidia, Celitement |
Cement | Recycled concrete fines | Reduced lifecycle emissions | Susteno |
Cement | Geopolymer cement | Reduced process emissions | Vertua |
Cement | Calcium sulphoaluminate cements | Reduced process emissions | Many products |
Concrete | CO2 curing/mineralisation | Uses CO2 and reduces water usage | Solidia, CarbonCure Technologies |
Concrete | Recycled concrete coarse | Reduced lifecycle emissions | Evopact, EcoCrete, FastCarb |
Concrete | SCM concrete | Uses less or no cement | Cemfree, Carbicrete, Regen |
Concrete | Uses less cement in mix | Uses less cement | |
Concrete | Admixtures | Uses less cement | |
Concrete | Locally sourced aggregate / better supply chain logistics | Reduced transport emissions | |
Concrete | Geopolymer concrete | Uses no cement | E-Crete |
Concrete | Graphene concrete | Uses less cement | Concrene |
Concrete | Carbon offsetting | Separate offsetting scheme | Vertua |
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.
Cemex reports on sustainability steps taken in 2019
27 March 2020Mexico: Cemex has shared its 2019 sustainability achievements in an integrated report entitled ‘Innovating for a Better World,’ which analyses the company’s strategic vision, operational performance and corporate governance against its commitment to drive innovation in the cement sector. Throughout the year, the company introduced its new Climate Action strategy to reduce CO2 emissions by 35% by 2030 and established an ambition to deliver net-zero CO2 concrete by 2050. It achieved an alternative fuel substitution rate of 28%, its highest since 2014, bringing its net specific CO2 emissions per tonne of cementitious product to 624kg.
Cemex’s net income was US$179m in 2019, down by 69% year-on-year from US$570m in 2018. Its sales declined by 8%, to US$4.3bn from US$4.7bn