Displaying items by tag: Alternative raw materials

Global: The Global Cement and Concrete Association (GCCA) has launched its ‘Cement and Concrete Industry Net Zero Action and Progress Report 2025/6’, which reports a fall by 25% in CO₂ intensity of cementitious products since 1990 and sets out policy measures needed to accelerate decarbonisation. The report was launched at COP30 in Belem, Brazil.

The report highlights more than 60 decarbonisation projects across alternative fuels, alternative raw materials, carbon capture, renewable energy and recycled concrete. Examples include Fletcher’s Golden Bay plant and JSW’s Nandyal and Shiva plants. Publicly announced projects are collated and made available to see on the GCCA/LeadIT green cement technology tracker. The document also calls for policies enabling non-recyclable waste use in kilns, wider adoption of blended products, national carbon pricing mechanisms and the use of construction demolition waste as recycled raw materials.

GCCA president and Heidelberg Materials chair Dominik von Achten said “Our industry is collaborating and innovating across every aspect of our production - finding new ways to work and deploying exciting technologies that are already making a genuine step change. However, to achieve the industrial scale transformation that our world needs, we cannot do it by ourselves - our industry needs the support of governments, policymakers, stakeholders, and our allies across the built environment right now.”

GCCA chief executive Thomas Guillot said “The breadth of activity we are seeing across our membership is truly inspiring, with great examples of projects and work across all decarbonisation levers, where enabling policies exist. Cement and concrete are essential materials for the world, but we know they are also essential to decarbonise. Despite our progress, we know that firm policy action across the world is fundamental to enabling us to accelerate our reductions.”

Türkiye: The European Bank for Reconstruction and Development (EBRD) is providing a €50m loan to cement producer Çimsa to support its decarbonisation efforts. According to the EBRD, the financing will fund a calcium aluminate cement (CAC) kiln and decarbonisation upgrades for existing grey and white cement kilns at Çimsa’s Mersin plant. CAC production has a ‘significantly’ lower carbon footprint than traditional grey cement, according to the producer.

The EBRD said that the project aligns with Türkiye’s Industrial Decarbonisation Investment Platform, the world’s largest industrial decarbonisation programme, which provides policy guidance and low-carbon pathways for hard-to-abate sectors, including cement.

Erdem Yasar, EBRD Deputy Head for Türkiye, said that the partnership supports both Çimsa’s competitiveness and broader industry sustainability.

South Korea: Cement packaging will now be required to display information on waste materials used in production under the revised Waste Management Act, the Ministry of Climate, Energy and Environment has announced. The regulation mandates that packaging show the types and amounts of waste materials used as alternative raw materials. A ministry source said “The outer surface of the packaging will only display the types of waste materials input, and scanning the QR code will link to a detailed information page about heavy metals and other components.”

Combustible waste such as tyres is also used as kiln fuel. The ministry said that South Korea is the first country to legally require disclosure of the kinds of waste material used in cement. The government is also pursuing revisions to the Housing Act to ensure that the types of cement used in new buildings are publicly disclosed.

Switzerland: The first nine months of 2025 yielded a 2% year-on-year decline in sales for Holcim, from US$15.3bn to US$15bn. Nonetheless, the company succeeded in raising its recurring earnings before interest and taxation (EBIT) by 2% to US$2.86bn. It recorded year-on-year organic growth of 3% in sales and 11% in EBIT. Holcim noted the centrality of sustainability in its growth in the period. Its sales of ECOPlanet reduced-CO₂ cement rose from 32% to 35% of total cement sales, while its sales of ECOPact reduced-CO₂ concrete sales from 26% to 31% of total ready-mix concrete sales. Its use of construction-demolition materials (CDM) in production rose by 20% year-on-year.

During the period, Holcim continued its on-going diversification through the acquisition of Germany-based walling systems producer Xella. At the same time, the company’s cementitious division continued to target ‘profitable growth in highly attractive markets,’ as exemplified through its Australia-based joint venture Cement Australia’s acquisition of BCG Cement. Across all divisions, Holcim closed 14 value-accretive transactions in the period. It spun off Holcim North America and sold its Nigerian cement business and Iraq-based Karbala Cement Manufacturing.

CEO Miljan Gutovic thanked Holcim’s 45,000 employees, saying "We are delivering on Holcim's vision to be the leading partner for sustainable construction. With accelerating net sales growth in the third quarter of 2025, we delivered strong profitable growth for the first nine months of the year, with a 10% increase in recurring EBIT in local currency and an industry-leading margin of 19%. Margin expansion was driven by our high-value strategy, scaling up our sustainable offering to meet customer demand, and accelerating decarbonisation and circular construction for profitable growth.” Gutovic confirmed Holcim’s full-year guidance for 2025, namely: recurring EBIT growth of 6 – 10% in local currency, with a margin of above 18% and free cash flow before leases of US$2.51bn.

Canada: Progressive Planet Solutions has hired Japan-based independent technical consultant Gerhard Albrecht. Albrecht’s work for Progressive Planet Solutions will focus on issues around the increased water demand of cement replacement by pozzolanic materials.

Albrecht has created over one hundred patents and appeared in more than 30 papers during his career as Vice President at Germany-based BASF Construction Solutions from 2006 to 2017. He previously held senior research positions at Degussa Construction Chemicals and SKW Trostberg. Albrecht holds a PhD in polymer science from Friedrich-Schiller University Jena, Germany.

North Korea: State-owned Komusan Cement has successfully deployed alternative raw materials derived from quarry overburden in cement production at its Komusan cement plant in Hamgyŏng Province. State-run Korean News has reported that the producer presented the resulting products at a provincial building materials exhibition.

The Komusan cement plant reportedly had ‘decades-worth’ of overburden in stockpiles, but previously lacked the equipment to properly process it.

France: Heidelberg Materials has launched a new range of its Socli lime product that contains hemp. The product is available in two binder and two coating formulations that combine natural hydraulic lime and plant fibres. Formulated for hempcrete bio-based concrete applications, on vertical walls or for insulating intermediate floors, its high lime content increases durability, according to the producer.

Heidelberg Materials says that the Socli lime range is especially suited to the restoration of historic buildings, as it guarantees breathable walls and healthy indoor air, and prevents mould, while providing thermal and acoustic insulation. The absence of cement further increases hygrometric regulation and thermal insulation.

US: Ozinga has broken ground on a 1Mt/yr alternative cement grinding plant in East Chicago, Indiana. The plant is equipped with a Gebr. Pfeiffer MVR5300-C6 vertical roller mill. It will produce ASTM C989-compliant slag cement and other blended cements. When operational in 2026, it will be the largest of its kind in North America, and avoid 700,000t/yr of CO₂ emissions from conventional cement production. Its location offers strategic rail, road and shipping access to large markets in the US and Canada.

East Chicago Mayor Anthony Copeland welcomed an anticipated 150 new jobs resulting from construction and subsequent operations at the plant.

India: During the fourth quarter of the 2025 financial year (which ended on 31 March 2025), premium products constituted 16% of Shree Cement’s sales mix, up from 12% one year previously. During the period, the company further diversified its offering with the launch of two new premium cements, Bangur Marble Portland slag cement and Extra White Portland slag cement, in Bihar, Jharkhand and West Bengal. Both products are designed for maximum brightness and smoothness within their category of CEM-II Portland slag cements. The company says that its growing portfolio helped it to increase its full-year financial realisation per tonne by 5% year-on-year.

Business Today News has reported that managing director Neeraj Akhoury said "In the 2025 financial year, 74% of our cement output was blended, avoiding over 7.2Mt of CO₂ emissions."

Shree Cement crossed 60% consumption of energy from renewable sources in May 2025, Construction World News has reported. It has 582MW of installed renewable power capacity and is currently in the process of building a 1MW battery storage system at one of its cement plants in India.

US: Researchers at the Massachusetts Institute of Technology (MIT) have developed an AI tool to compare studies of alternative raw materials for cement production. A collaborative team from the MIT Concrete Sustainability Hub and MIT’s recycling research programme, Olivetti Group, published its findings in the Nature journal. The team mined 5.7m academic publications to identify 14,434 alternative raw materials. These belonged to 19 ‘types,’ including bottom ashes, fly ashes, calcined clays and slags, as well as less homogenous types such as biomass ashes, glasses and mine tailings. The study more than doubles the number of fly ashes and slags recorded on a database of this kind. The tool then provides a unified assessment of cementitious reactivity and pozzolanicity, also accounting for variables in particle size and amorphous content.