Displaying items by tag: Recycling

UK: Cemex UK has relaunched its used pallet collection service. The scheme aims to reduce timber waste in its supply chain, according to the company. It forms part of its Future in Action – Committed to Net Zero CO2 climate action strategy. Its partner ELM will collect stockists’ pallets free of charge for refurbishment and return to Cemex UK. It will reuse all repaired pallets and recycle those damaged beyond repair.

Packed cement sales manager Graeme Barton said “We want to make life easier for our merchants to work with us to reduce waste. We’d like to make pallet recovery part of the standard delivery process, as many pallets still end up in landfill. It is increasingly costly to dispose of pallet waste and there is far greater value to be gained by recycling and reuse. Rising timber costs, combined with pallet shortages, means there is a heightened need to conserve and maintain pallets throughout the supply chain. Recovery is considerably more cost effective than buying new replacements.” He added “Pallets are a standard format in transporting building products and contribute a significant financial and environmental cost which needs to be captured by the user. We saw a similar situation with supermarkets and plastic bags, but we’d rather not wait for legislation to enforce this; we’d really like to make a difference now with preventative action. The pallet recovery service is regenerative by design and aims to support the key principals of the circular economy to benefit business, society and the environment. If we all pull together it will have a significant impact across the whole supply chain.”

Germany: Holcim Deutschland says it has joined Madaster, an online registry for materials and products. Under the scheme, buildings are registered, including the materials and products that were used in their construction. This is intended to make the reuse or recycling of the materials easier, to encourage ‘smart’ design and to eliminate waste. Thorsten Hahn, the chief executive officer of Holcim Deutschland said “The use of alternative raw materials and the closing of product cycles are among the greatest challenges in the construction industry. We owe it to future generations to use the resources that are available to us responsibly and sensibly.”

Holcim has started to unify its low carbon cement product range this week with the launch of its ECOPlanet label globally. The products are already available in Germany, Romania, Canada, Switzerland, Spain, France and Italy. The plan is to extend this to 15 countries by the end of 2021 and then to double its ‘market presence’ by the end of 2022.

The headline news is that the range will include what Holcim says is the world’s first cement product with 20% recycled construction and demolition waste. This appears to be an improvement on the group’s Susteno cement products that use fine fractions from concrete and demolition waste. This product is currently sold in Switzerland where it is advertised as saving 10% of CO₂ emissions compared to a standard cement product. Both Holcim and HeidelbergCement already sell concrete products that use the coarse waste from building demolition. Other than this, Holcim says that the range will also include cements that contain calcined clay. In June 2021 subsidiary Lafarge France announced that it would produce a cement product under the ECOPlanet banner using kaolin clay with its proprietary ProximA Tech process at its integrated La Malle cement plant in Bouc-Bel-Air.

We will have to wait and see how far Holcim goes in standardisng the range between different countries. Yet, judging from what the countries that are already selling ECOPlanet are doing, it looks like it will be a variety of blended cements. At present, for example, Holcim Germany offers four products in the ECOPlanet range. These are all slag cements, with three having effective CO₂ reductions of up to 70% and the fourth, ECOPlanet Zero, reaching 100% through a carbon offsetting scheme in conjunction with MoorFutures. Holcim Italy also launched a product in the range called ECOPlanet Prime using calcined clay in June 2021.

Incidentally, LafargeHolcim US announced a research project this week with the US Army about using demolition waste. It’s going to start working with the US Army Corps of Engineers’ Engineer Research and Development Center and Geocycle to look at how construction and demolition materials from military installations can be used for energy recovery and mineral recycling. Group resources at Geocycle’s Holly Hill Research Center in South Carolina, US and Holcim’s Global Innovation Center in Lyon, France will be used in the scheme.

Other low carbon cement products are available of course. Holcim is far from alone in launching low CO₂ cement and concrete products. Yet the use of worldwide brand names is different. Cemex is doing something similar with the global rollout of its Vertua concrete products. It first launched Vertua in France in 2018 before going global in 2020. Holcim started to launch ECOPact Concrete in 2019. Now, Holcim has gone further by doing the same thing with cement. Given how localised cement and concrete products are, it will be instructive to see how global branding for low carbon cementitious products helps these companies. For instance, who is the target audience? It could be eco-minded self-build customers or project specifiers or government departments or industry lobbyists. Or perhaps it is simply another marketing channel to reinforce the sector’s sustainable offerings.

The other point worth considering is when will the multinational cement producers start selling sustainable cements and concretes in less rich parts of the world? While Holcim was playing with blended cements and marketing this week, Dangote Cement said that it was ready to start commissioning its new 6Mt/yr integrated plant at Okpella, Edo State in Nigeria. Another 5Mt/yr plant is also on the way in the country from Madugu Cement. It has just signed a contract for China-based Sinoma International Engineering Company to build it. When Holcim and the other cement companies start selling low carbon cements in places like Nigeria then the rise of these products will be complete.

For more information on low CO₂ cement production read our feature in the February 2021 issue of Global Cement Magazine

Mexico: The municipal administration of Atotonilco de Tula, Hidalgo province, has given US$3050 to Cemex to help with the running of its Ecomunidad recycling initiative. In June 2021, the initiative involves recycling collection at 11 Cemex sites and has educated 11,000 people. Since its foundation at 20 local schools in 2019, the initiative has recycled 37t of plastic waste.

Switzerland: Sika has developed ReCO2ver, a process which produces limestone, sand and gravel from the combination of concrete and CO₂ with an additive developed by the supplier. The process enables demolition companies to completely recycle used concrete, while storing captured CO₂ at a rate of 60kg/t of crushed concrete. The materials produced can be used as aggregates to make concrete of comparable strength to an all-new product.

Chief executive officer Paul Schuler said, "The five largest European Union countries alone generate roughly 300Mt/yr of old concrete. With complete recycling of these materials, up to 15Mt/yr of CO₂ emissions can be stored. We are convinced that our new process has the potential to benefit both our customers and the environment."

Colombia: Grupo Argos subsidiary Cementos Argos has recycled a total of 7m cement bags since 2013 under its Green Bags recycling initiative. The El Nuevo Siglo newspaper has reported that the recycled bags contained 1000t of paper. In water savings alone, the figure corresponds to 80,200m3 - enough water to supply 472,000 people for a day. 159 commercial customers have so far contributed their used bags. In the Medellín metropolitan area, the programme achieved a bag return rate of 95%.The group overcame coronavirus pandemic-related challenges to recycle 15,900 bags in 2020.

Japan: Taiheiyo Cement plans to establish a facility for processing waste produced by natural disasters in Saitama Prefecture. The company says that the facility will sort waste for recycling and sort non-recyclable materials suitable for use as cement additives for further processing. The plans received approval at a talk with Kumagaya City and Saitama Prefecture administrators in mid-January 2021.

The company said, “We have been accepting waste and by-products for cement production and promoting recycling, and we are now also working to contribute to the early recovery of disaster areas.”

Spain: Cementos Molins has dismantled kilns 3, 4 and 5 of the Sant Vicenç dels Horts cement plant in Catalonia. The company says that it will use 48,000t of waste material from the demolition process in cement production in kiln 6 at the plant. The material consists of 35,000t of concrete, 10,000t of scrap metal, 1450t of refractory material and 1500t of other waste.

The total investment cost of the dismantling work was Euro2m. The company said that the demolition of silos presented the most complex challenges of the 24-month process.

The plant mothballed lines 3, 4 and 5 upon the opening of line 6 in 2010.

Switzerland: LafargeHolcim has announced the launch of EcoLabel, a brand to encapsulate its green cements and concretes. All products bearing the label must have either a 30% lower carbon dioxide (CO₂) footprint compared to the local industry standard or use 20% recycled content. The company says that the reason behind EcoLabel is to “support builders in making greener choices” and to “accelerate the company’s Net Zero Journey.”

Chief sustainability officer Magali Anderson said, “I am very proud of how our company is turning our net zero pledge into action across more than 70 countries, with our broad range of green building solutions. The EcoLabel is a key milestone on this journey, confirming LafargeHolcim’s commitment to lead the way in sustainability and innovation.”

Canada: Lafarge Canada, Geocycle Canada and Rio Tinto are working together to reuse waste from the aluminium smelting process to make cement. The three companies have developed a new product called Alextra, made from used potlining, as part of the aluminium electrolysis process that would otherwise go to landfill. Lafarge Canada plans to produce on average 1Mt/yr of cement at its plant in Bath, Ontario, using Alextra as an alternative to raw materials such as alumina and silica. The companies will also explore options to further expand the supply of Alextra from Rio Tinto’s Potlining Treatment Plant in Saguenay-Lac-St Jean to Lafarge Canada's network of cement plants.

"This partnership shows how Rio Tinto is innovating to find new ways to reuse waste, generating value from our operations and reducing their environmental footprint,” said Rio Tinto Aluminium manager valorisation and marketing Stéphane Poirier. “We have worked closely with Lafarge Canada and Geocycle Canada over the past two years to develop a product that meets their needs and look forward to building on this partnership,”