Displaying items by tag: Sustainability

Vietnam: Industry leaders have argued that co-processing of non-recyclable plastic waste in cement kilns could be a scalable solution to advance Vietnam’s sustainability and circular economy goals. At a workshop held in Hanoi on 2 October 2025, the Norwegian Foundation for Scientific and Industrial Research (SINTEF) and the Royal Norwegian Embassy, in partnership with the Vietnam National Cement Association (VNCA), concluded the OPTOCE Project (‘Ocean Plastic Turned into an Opportunity in Circular Economy’), funded by the Norwegian government.

Norwegian Ambassador to Vietnam Hilde Solbakken said “Combating marine plastics and climate change is a top priority for Norway – both globally and in Vietnam. Through OPTOCE, we’ve seen how science-based solutions like co-processing can transform plastic waste into a resource that benefits the climate, the economy and communities.”

OPTOCE was originally launched as a regional initiative in five countries, including Vietnam, and later expanded to eight countries across Asia. The workshop featured several presentations and a panel discussion focusing on the legal framework, potential waste supplies, and the practices and challenges in implementing co-processing in Vietnam.

Dr Kåre Helge Karstensen, chief scientist and programme manager of OPTOCE, added that the initiative has proven co-processing to be both technically feasible and environmentally sound. “The next step is to move beyond pilots and integrate this solution into national policy frameworks to drive systemic change,” he said.

Dr Lương Đức Long, VNCA vice president, said Vietnam’s cement industry is already applying co-processing successfully. “Co-processing waste in cement kilns is a safe and effective solution. We hope the government introduces specific policies and incentives that support enterprises and technology transfer. If we join forces, co-processing will turn wastes into ‘black gold’ and cement factories into ideal co-processing hubs,” he said.

Vietnam’s cement plants, including INSEE’s Hon Chong facility in Kien Giang and Lam Thach Green Cement (QNC)’s plant in the north, have piloted this approach since 2021, achieving thermal substitution rates of 35–40%.

India: Noida International Airport (NIA) has become India's first large-scale project to utilise limestone calcined clay cement (LC3), a low-carbon alternative to traditional cement. In a statement, concessionaire Yamuna International Airport Private Limited (YIAPL) said LC3 was used extensively in the construction of the airport.

Developed for more than 10 years by researchers at IIT Delhi, IIT Madras, Swiss Development Cooperation, École Polytechnique Fédérale de Lausanne (Switzerland), Universidad de las Villas (Cuba), and Technology and Action for Rural Advancement (TARA), LC3 emits up to 40% less CO₂ than conventional Portland cement. It costs 25% less to produce, uses low-grade limestone and clays and requires lower energy for manufacturing while delivering comparable strength.

Senegal: The Ministry of Environment and Ecological Transition, with the support of the United Nations Climate Technology Centre and Network (CTCN) and funding provided by the European Union through the Innovative Climate Solutions (ICS) Programme, held a workshop in late September 2025 to launch the development national roadmap for decarbonisation in the cement industry. The initiative, implemented by Cementis, aims to reduce CO₂ emissions in cement production in the country by optimising industrial processes and adapting the energy sources used.

Croatia: Holcim has inaugurated the Kodeco investment at its Koromačno cement plant, with commissioning still ongoing, according to a Linkedin post by Region Head Central and East Europe, Simon Kronenberg. The project includes the installation of a new calciner, a chlorine bypass, and storage and transport systems for solid recovered fuel (SRF). Holcim said the investment marks a key step in enhancing the efficiency and sustainability of its operations in Croatia.

UK: Cemex UK has announced a partnership with The Pallet LOOP to roll out reusable pallets for its Rugby Cement products from October 2025. The company said that it is the first cement manufacturer to adopt the LOOP system. The initiative forms part of Cemex’s ‘Future in Action’ strategy to reach carbon neutrality by 2050. Initially, the LOOP pallets will be used for the core Rugby packed range, including Premium Cement (paper and plastic bags), High Strength and Sulphate, with expansion across the portfolio planned for later phases.

Vicki Elliott, national sales manager for bagged cement at Cemex UK, said “This is a significant step forward for the cement industry. We’ve supported The Pallet LOOP from day one, signing its charter back in 2022. Now, we’re proud to be the first in our sector to integrate this solution into our supply chain. It’s about doing the right thing, as simply as possible: reducing waste, cutting carbon and helping our customers make more sustainable choices.”

The Pallet LOOP addresses the construction sector’s reliance on single-use pallets, of which fewer than 10% are reused, generating over 250,000t/yr of wood waste, according to the company. The Pallet LOOP’s FSC-certified pallets are built for multiple trips and backed by a nationwide collection service that offers financial incentives for returns.

We return to Brazil this week where Cimento Itambé has inaugurated a new kiln at its plant in Balsa Nova, Parana. The US$92m investment has added 0.6Mt/yr of cement production capacity to the unit, bringing its total to 3Mt/yr. Notably, the new kiln is intended to support the use of alternative fuels (AF) such as biomass and industrial waste. Local press reports that the new kiln can operate with a 50% AF thermal substitution rate (TSR) and in tests it has reached as high as 67%.

Local market leader Votorantim Cimentos has also embarked on an upgrade programme linked to increasing co-processing rates. In May 2025 it said that it had received and begun installing a new cement mill, supplied from China, at its Salto de Pirapora plant near São Paulo. Earlier in August 2025 it revealed that it was spending US$60m on upgrades at its Nobres and Cuiabá plants in Mato Grosso. A new cement grinding mill is to be installed at the Nobres plant. This should increase the site’s cement production capacity to 1.2Mt/yr from 0.6Mt/yr. At Cuiabá the company is installing a tyre shredding unit via its Verdura subsidiary to support increased rates of co-processing of AF. Work on these projects is set to start in 2025 with completion scheduled by the end of 2026.

These schemes are part of the group’s larger US$920m upgrade investment plans across the country. Announced in early 2024, this is intended to increase competitiveness and co-processing capacity and reduce CO₂ emissions. It will also add 3Mt/yr to the company’s production capacity. An investment of US$150m from the International Finance Corporation (IFC) in 2023 to Votorantim to support the uptake of AF is likely to have helped the decision to upgrade. The company currently has a target of a 50% TSR by 2030.

Of the other major producers, CSN is also aiming for a 50% TSR by 2030. It said in its 2024 sustainability report that all of its kilns were capable of processing AF. It also highlighted upgrade work at its Alhandra, Paraíba, plant in 2024 to handle, store and transport fuels, including biomass. InterCement reported some relatively high TSRs at individual plants in Brazil in 2023. For example, its Ijaci plant in Minas Gerais reportedly had a rate of 42%.

National Cement Industry Union (SNIC) data shows that the co-processing rate of AF reached 32% in 2023. The union says that this puts the sector ahead of its next target of 30% in the mid-2020s. The next one is to reach 35% by 2030. For reference, back in 2019 the country’s Cement Technology Roadmap reported that around 60% of cement kilns in the country were licensed by environmental agencies to co-process waste.

Graph 1: Sales of cement in Brazil, 2017 - 2025. Source: SNIC.

Looking at the domestic industry in general, SNIC reported growth in 2024 and the first seven months of 2025. Sales for the first seven months of the year grew by 4% year-on-year to 38.2Mt. This has been attributed to the real estate sector, boosted by the Minha Casa Minha Vida housing programme, and an expanding job market. Yet jitters remain, with fears of an economic slowdown in the second half of 2025 and uncertainty on how new US tariffs might affect the cement industry indirectly. Despite only exporting around 65,000t of cement in 2024 though, the association is wary of any indirect effects of tariffs.

It’s no surprise that cement plants in Brazil are prioritising AF usage. The market is buoyant and co-processing offers one of the cheapest routes to decarbonising cement production in the short-to-medium term. Increasing the use of AF can also potentially hedge against the cost of imported conventional fuels, such as coke, that are priced in US dollars. This is one example of SNIC’s concern over indirect effects on the cement industry from US tariffs via currency volatility. Expect AF rates to carry on rising.

The 18th Global CemFuels Conference & Exhibition on alternative fuels for cement and lime will take place on 17 - 18 September 2025 in Milan, Italy

Mexico: Cementos Moctezuma has established what it calls an ‘ambitious’ plan to reduce its embodied CO₂ emissions per tonne of cement to below 500kg by 2030. José María Barroso Ramírez, Cementos Moctezuma's CEO, explained that the company will optimise efficiency at every stage of production, without compromising cement quality. The company’s cement plants will also co-process up to 30% of alternative fuels. Maribel Leyte Jiménez, director of sustainability, environment, and continuous improvement, emphasised that reducing the clinker factor – while maintaining performance – is also key to lower emissions.

Cementos Moctezuma's 2030 roadmap is based on health and safety, energy and climate change, social responsibility and the environment, as well as biodiversity and the circular economy. These pillars are used to evaluate the company's performance each year.

One of the projects being carried out by the company is Reef Balls, in which artificial reefs are used to repopulate coastal areas with flora and fauna. Engineer José María Barroso points out that the implementation of approximately 500 Reef Balls would lead to a reduction of more than 1200t of CO₂. This initiative has been carried out in the state of Yucatán, but plans are underway to replicate the project on more beaches in Mexico.

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.

Costa Rica: Holcim Costa Rica has issued its first sustainability report, which states that it reduced CO₂ emissions by 19% between 2018 and 2024. During the last year, the company prevented the release of more than 4600t of CO₂ thanks to improvements in thermal efficiency. It also processed more than 72,000t of municipal and industrial waste as energy or alternative fuel in cement production and reused more than 90% of the industrial water consumed at its cement plant. It reported that it has reached gender equality within its executive team, with 50% female and 50% male leadership.

Holcim Costa Rica’s 2030 goals include achieving a 32% reduction in primary CO₂ emissions from cement plant operations, a 5% reduction in electricity consumption and a 21% reduction in logistics emissions, while reaching a net positive impact on biodiversity, and reducing the use of fresh water.

Mexico: Holcim has placed Mexico at the centre of its NextGen Growth 2030 strategy to ‘drive profitable expansion’ in Europe, Australia, North Africa and Latin America following the spin-off of its North American business. Mexico now plays a strategic role in scaling sustainable construction solutions across the region and will allow Holcim to respond to key global trends such as urbanisation, housing shortages, resilient infrastructure and environmental sustainability.

Holcim Mexico CEO Christian Dedeu said “Mexico is now a strategic market where we will scale innovative solutions for circular and low-carbon construction. Our goal is to triple the recycling of demolition materials, double the Disensa store network and expand our sustainable offering through ECOPact and ECOPlanet.”

Dedeu added “In a region facing major social and environmental challenges, Mexico and Latin America have the potential to lead a new era of sustainable construction. At Holcim, we are committed to scaling solutions that address the climate emergency while building progress for people and the planet.”