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A circular economy is imperative for a sustainable future

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Ujjwal Batria, Chief Operating Officer, Dalmia Cement (Bharat)

Give us a brief on the activities of Dalmia Group in the Indian subcontinent regarding AFR.

Cement is an essential commodity in construction and infrastructure development. Although there is some environmental impact during its production, we have always adhered to strict environmental norms and have implemented various measures in line with the evolving technologies to reduce the carbon footprint. In sync with the Swachh Bharat Mission, we make major use of AFR (alternative fuels and raw materials).

Apart from AFR, we use fly ash (thermal power plant waste) and BF Slag (steel industry waste) in our blended cement, which comprises nearly 80 per cent of our product portfolio. Our AFR consumption has more than doubled from 14.5 per cent in FY20 per cent 13-14 to 30 per cent in FY2017-18. Portland Slag Cement and Portland Composite Cement collectively contribute to nearly 50 per cent of our product portfolio. Similarly, our clinker factor has come down to 63 per cent at current levels from about 81 per cent in 2013.

What has been the performance of Dalmia in the last two years in terms of TSR? What do you think about the next three years?
At the group level, we have touched 4 per cent TSR (Thermal Substitution Rate) compared to nearly 0.5 per cent five years ago. We have also developed pockets of excellence in some plants where nearly 18 per cent of TSR has been achieved. Presently, we are utilising various alternative fuels such as biomass, tyre nylon threads, carbon black, spent wash, paint sludge, spent carbon, sawdust as well as waste from cotton, plastic and footwear. While boosting the bottom line, these simultaneously curb GHG (greenhouse gas) emissions from cement operations. Moving forward, we are augmenting our fuel feeding systems with additional investments for making more use of both solid and liquid alternative fuels.

What do you think needs to be done urgently to improve the overall TSR numbers in the country?
Thermal Substitution Rate refers to the percentage of sustainable alternative fuels used in replacing fossil fuels. Commodity materials such as refuse-derived fuel (RDF) improve TSR percentage but lower investment payback. India is targeting 25 per cent TSR by 2025. Yet, compared to global standards (TSR of about 60 per cent to 100 per cent in many countries), we remain far behind. The main issues – waste characteristics and lack of support from the required agency for generating good segregated waste quality.

A circular economy is imperative for a sustainable future. Given its second-largest producer tag, India’s cement industry contributes to the circular process by handling different types of waste – whether it is steel industry slag, municipal solid waste or fly ash. The cement industry can be a mega player in waste management. In 2017-18, its production was 298 MTPA, which is expected to touch more than 550-600 MTPA by 2025. To meet this demand, it requires more than 51 million tonnes of coal that is already in short supply.

Besides, given the Centre’s Swachh Bharat Mission, we should use alternative fuels and raw materials (AFR). Along with the need for AFR, it is essential to use RDF along with other industrial waste, which is anyway a part of kiln feeds. Consequently, RDF offers an immense opportunity to boost the TSR of cement kilns, which could also save millions in foreign exchange due to lower coal imports. From 1 per cent a few years ago, the average TSR is now 4 per cent. The target is 25 per cent by 2025 and 30 per cent by 2030.

Are you handling industrial or any hazardous waste at any of the plants under your control? Kindly provide details.
The country’s cement industry is no longer as polluting or hazardous as some others since a complete transformation has occurred in this sector. A single visit to any of our sites will dispel any preconceived notions about cement plants being most polluting and hazardous.

The environmental emission norms mandated by the Government of India for the cement industry are at par with many developed countries. Cement is a basic building block and an essential glue that binds concrete – the world’s second-most consumed commodity after water. Nonetheless, when any industrial activity takes place on such a scale, some collateral impact on the environment cannot be ruled out. In recent years, however, the industry has made its operations significantly safer.

Overall, the industry is using waste more energy efficiently. The industry consumes almost 50 per cent of the country’s fly ash. Likewise, the steel industry’s entire BF Slag is used by our industry. Many cement plants in India are water positive. In other words, we are providing more water to nature than we take from it. The cement industry is growing by leaps and bounds in promoting sustainable business practices in India. Recently, international climate research rating agency CDP published their report on the global cement sector. CDP ranked six cement companies from India in the Top 10. Dalmia Cement has been ranked No.1 in the CDP report on business readiness for low carbon transition.

More than 65 per cent of cement production capacity in India comes under the Global Cement and Concrete Association (GCCA). The main objective of GCCA is introducing sustainable business practices in the industry. Moreover, safety is the topmost priority. Typically, there is a major shift in providing a safe environment for our employees. Progressive cement companies are implementing a people-first policy, making the safety of workers a priority. Engagement in the supply chain is another area where much progress has been made. Various programmes such as defensive driving and driver passport system have been initiated for greater safety of workers, including during transport-related operations.

Provide more details on the platform created for handling hazardous waste.
Cement kilns deploy co-processing in waste disposal. Unlike landfilling and incineration, this practice is a more sustainable and environment-friendly waste disposal method thanks to the lower emissions and lack of residue after the treatment. Recently, our cement sector has made significant investments in ensuring a greener future via the enhanced use of AFR and other means. But the industry’s contribution is contingent on the progress of the nation’s overall waste management segment.

The progress on the AFR front has been robust, which includes the penetration of blended cements. While OPC (Ordinary Portland Cement) was the market leader in India earlier, today it has only around 20-25 per cent of market share. It is heartening that nearly 75 per cent of the nation’s cement production presently is in the form of various types of blended cement against barely 30 per cent in 1999-2000. The Indian cement industry has more potential to use alternative fuels than is being done currently. Yet, to achieve this, a complete transformation is required in India’s waste management sector from the generation point to disposal methods. Once implemented, the circular economy could become the backbone of India’s waste management practices. There is overwhelming customer acceptance of environment-friendly products. Many States have also come forward and developed policies for greater utilisation of blended cements. On our part, we are continuing policy advocacy and training of masons in using more blended cements and making them sensitive to environmental issues such as climate change. The use of industrial wastes in cement offers the technical advantages of improved durability and lower carbon footprint.

Can hazardous waste and other waste materials go together in the kiln or have to be moved separately?
Cement kilns use co-processing for waste disposal. Unlike landfilling and incineration, this is a more sustainable and environment-friendly waste disposal method due to lower emissions and lack of residue after the treatment. Thereby, waste materials in industrial processes are used as AFRs in recovering material and energy from them. These are fully utilised as a replacement for fossil fuels in cement kilns. Given the high temperatures in cement kilns, various kinds of wastes are disposed of effectively without harmful emissions by co-processing. In many countries, different types of plastic wastes are regularly disposed of in an environmentally-sound manner through co-processing. In essence, hazardous and non-hazardous wastes, which includes plastic wastes, are used as AFRs.

Nonetheless, care is required in selecting wastes and equipment, with trained personnel handling the co-processing of any waste. Tell us something about the pre-processing required for hazardous waste.
Conversion of Segregated Combustible Fraction (SCF) into RDF is done by a waste management operator at the existing waste management site. This comprises setting up a pre-processing facility with storage, shredding and blending operations. The cement company needs to establish a co-processing facility in the plant to ensure its viability. For the plant, the expenditure streams are the pre-processing cost and RDF transportation cost.

In utilising hazardous waste, enormous challenges arise since it’s necessary to have proper inputs from waste generators about the waste characteristics while having a proper material safety data sheet to understand the important precautions during transportation and usage of different wastes.

What has been your experience in moving waste across state borders after the introduction of GST? To what extent the movement has become less painful?
Overall, the introduction of GST has made transport of waste smoother besides reducing the compliance costs as well as complexity. Earlier, due to multiple state entry taxes and CST, it was more cost-effective in maintaining multiple warehouses in different states. But the higher number of warehouses meant most were operating below capacity, creating operational inefficiencies. GST has made this practice redundant as companies benefit by consolidating and maintaining warehouses wherever it is more beneficial. This has thus boosted operational efficiencies.

Additionally, there is a reduction in transit time as vehicles now spend less time idling at checkpoints. In turn, this has lowered logistics costs. Taking these factors into account, movement of waste is less cumbersome for cement companies today.

It is said processing of any kind of waste is not a problem but the issue is of logistics and getting waste at the plant at the right price. How do you think the problem can be solved?
For an industry holding 10 per cent global market share and as the third-largest volume product loader of the Indian Railways, multi-modal transport options are crucial. In comparison with other industries, as a per centage of sales, cement holds the highest logistics cost. This cost soars when the material is unloaded and transported further via road and if it is brought from or taken to the hinterland. The industry requires solutions for controlling transport costs since it comprises about 20% of retail cement prices. Therefore, automation of key processes vis-a-vis monitoring and controls could provide savings in freight costs. Some initiatives can include planned transport deploying intelligent algorithms as well as smart monitoring in implementing operations via GPS technologies.

Wherever possible, Railways should be used for transport as it is the most economical form. Such a focused approach can yield cost benefits. Meanwhile, initiatives are being undertaken by the Railways to ease movement of goods – whether raw materials or finished products. Development of mega stations and dedicated freight corridor will also be useful in boosting cement logistics. More cement manufacturers are now inking long-term freight contracts with the Railways, which will lead to a significant reduction in operating costs.

Do you think that Indian plants have been handling waste in a safe manner that will not cause harm to society in general?
While supply, segregation, quality and consistency are important in handling waste safely, segregation is the most important. Segregation and management at source are generally the best means of managing waste. Thereafter, waste quality and consistency are essential for effective disposal. While existing norms are adequate, the focus needs to be on proper implementation. Standardisation of waste disposal norms could facilitate greater safety while ensuring the cement sector leaves a lower carbon trail.

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Economy & Market

Fornnax Names Lukas Baur as Authorised Service Partner to Bolster EU Operations

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Strapline: Fornnax Technology has appointed NOBA Maschinenservice’s Lukas Baur as its authorised service partner for the European Union, strengthening its commitment to delivering fast, reliable, and localised after-sales support across the region.

Fornnax Technology, a leading manufacturer of industrial shredding solutions, has announced the appointment of Mr. Lukas Baur of NOBA Maschinenservice as its authorised service partner for the European Union. The partnership, formalised under the authorisation of Fornnax CEO Mr. Jignesh Kundaria, reinforces the company’s commitment to providing dependable, localised service support to its expanding customer base across Europe.

Strengthening Service Through Proven Expertise

With over two decades of experience in servicing, maintaining, and overhauling industrial shredders, Mr. Baur brings extensive technical expertise to the partnership. His capabilities span welding, hardfacing, shaft and knife rebuilding, complex assembly, hydraulics, and complete electrical engineering services, delivered in collaboration with a trusted partner company based in Halle/Saale.

Operating from Worbis, Germany, Mr. Baur is strategically positioned to provide emergency support across the European Union within 24 hours, covering an operational radius of approximately 1,000 kilometres.

Supporting this capability is a well-equipped service infrastructure comprising 12 Mercedes Sprinter service vans, a team of 24 skilled technicians, specialised bearing-change tools, a fully equipped hydraulic workshop, and a 1,000-square-metre facility with a five-ton crane track. Together, these resources position his team to manage the complete spectrum of Fornnax’s European service requirements efficiently and reliably.

Partnership Driven by Industry Insight

Having spent years servicing Eldan, Lindner, and Vecoplan shredders across the European recycling industry, Mr. Baur’s decision to collaborate with Fornnax is rooted in his understanding of market needs and customer expectations. His experience has provided valuable insight into what recycling plant operators require—not only from their machinery but also from the service teams supporting them.

According to Mr. Baur, Fornnax’s reputation for robust machine construction, superior wear protection, and maintenance-friendly design made the partnership a natural fit.

The collaboration comes at a time when Europe’s tyre recycling industry is facing mounting challenges, including rising cost pressures, shrinking margins, delayed investments, and a shortage of skilled labour. Mr. Baur believes these conditions reinforce the need for technically strong service partners capable of delivering rapid, dependable support.

Commenting on the partnership, he said, “Fornnax, with its exceptional price-performance ratio and superior quality, has the potential to become a market leader in Europe. We would like to be their service partner in this journey.”

Comprehensive Support Across the Equipment Lifecycle

As Fornnax’s authorised service partner, Mr. Baur will oversee the complete lifecycle support of the company’s equipment throughout the European Union. His responsibilities will include installation, commissioning, preventive maintenance, emergency repairs, and spare parts support across mechanical, hydraulic, and electrical systems.

Looking ahead, he also plans to develop a centralised spare parts distribution hub for European customers, particularly if Fornnax establishes a warehouse facility in Worbis to facilitate faster deliveries. To further strengthen service coverage, Mr. Baur intends to expand operations by adding two to three additional service teams and vehicles each year, progressively increasing capacity across the continent.

A Shared Commitment to Customer Excellence

Highlighting the strategic importance of the partnership, Mr. Jignesh Kundaria, Director and CEO of Fornnax, said:

“We strongly believe that by continuously improving our service quality and customer satisfaction index, we can build long-term relationships with our customers. Higher customer satisfaction leads to greater trust, which significantly increases repeat orders and ultimately drives sustained growth in our sales revenue.”

This customer-first philosophy underpins Fornnax’s strategy of building a dedicated European service partner network instead of relying solely on remote support. With Mr. Baur joining this network, customers across the European Union will benefit from faster response times, expert technical assistance, and dedicated on-ground support from a partner with extensive experience in high-throughput shredding operations.

Mr. Baur’s appointment also reflects Fornnax’s broader ambition to establish itself as the preferred shredding solutions provider for the European recycling industry, marking another important milestone in the company’s international growth strategy.

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Concrete

Nuvoco Vistas launches Limla cement plant, expands Gujarat footprint

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Nuvoco Vistas opens a 2 MMTPA grinding unit at Limla, entering Gujarat and advancing its target of 35 MMTPA capacity by FY 2028.

Surat (Gujarat)

Nuvoco Vistas Corporation Ltd, a part of Nirma Group and one of India’s leading building materials company, has inaugurated the Limla Cement Plant in Surat (Gujarat), one of Vadraj Cement Limited’s (VCL) principal manufacturing facilities. The commissioning represents a key milestone in Nuvoco’s acquisition and restoration of VCL, while supporting the company’s expansion across the Western Indian cement market.

Vadraj Cement Limited is a subsidiary of Nuvoco Vistas Corporation Limited and has installed cement capacity of 6 MMTPA across its assets. The Limla inauguration therefore represents the first operational step in the acquired platform’s wider revival, while the Kutch facilities provide clinker supply, mineral security and coastal logistics support for the western business.

Nuvoco completed its acquisition of Vadraj Cement Limited, then under the Corporate Insolvency Resolution Process, after paying a consideration of Rs 1,800 crore in June 2025. VCL’s asset portfolio comprises a clinker unit at Kutch and a grinding unit at Limla in Surat. It also includes high-quality captive limestone reserves and a captive jetty at Kutch, supporting more efficient logistics. Following the takeover, Nuvoco began an extensive programme of restoration, refurbishment and expansion at both locations, leading to the commissioning of the Limla plant.

The Limla Cement Plant is expected to support a phased increase in sales volumes across Gujarat. It will also help Nuvoco supply neighbouring markets in Western Maharashtra and release cement capacity from its northern plants, which can consequently be redirected towards markets in North India. The plant will manufacture a full portfolio comprising Ordinary Portland Cement, Portland Slag Cement, Portland Pozzolana Cement and Portland Composite Cement. It will additionally produce the complete Nuvoco Duraguard range, including the premium Nuvoco Duraguard Microfibre product. The acquisition is also expected to generate operational synergies with Nuvoco’s existing plants at Nimbol and Chittorgarh in Rajasthan, improving logistics optimisation and market reach across important regional markets.

The grinding unit at the Limla Cement Plant was completed ahead of schedule, with 2 MMTPA of capacity now inaugurated to expand Nuvoco’s operating scale and customer reach. After Vadraj Cement’s assets become fully operational, plants in North and West India are expected to account for nearly 40 per cent of Nuvoco’s total cement capacity. This will broaden the company’s manufacturing network, strengthen access to high-growth markets and support its plan to increase consolidated cement capacity to 35 MMTPA by FY 2028, reinforcing its longer-term growth strategy.

Commenting on the development, Jayakumar Krishnaswamy, Managing Director, Nuvoco Vistas Corp Ltd, said: “The inauguration of the Limla Grinding Unit in Surat is an important milestone in Nuvoco’s growth journey and demonstrates our commitment to disciplined, value-accretive expansion. Gujarat is strategically significant for Nuvoco, with substantial opportunities arising from infrastructure investment, industrial growth, rapid urbanisation and continuing demand from the housing and construction sectors. The facility strengthens our regional footprint, improves operational flexibility and increases our ability to serve customers across northern and western markets with greater reliability and efficiency.”

He added: “Through the Vadraj acquisition, we have refurbished and restarted a strategically important asset, returning it to operations in record time through strong execution and collaboration between teams. The achievement demonstrates our ability to create value from acquired assets, fulfil our commitments and retain the confidence of stakeholders. It also highlights the strength of our project delivery capabilities and our continued focus on building sustainable, profitable growth over the long term.”

Nuvoco Vistas Corporation Limited is a building materials company whose vision is to build a safer, smarter and more sustainable world. It is among the leading players in East India and has a significant presence across North and West India. Nuvoco began operations in 2014 with a greenfield cement plant at Nimbol, Rajasthan. It later acquired Lafarge India Limited, which had entered India in 1999, followed by Emami Cement Limited in 2020 and Vadraj Cement Limited in April 2025. The company has also announced an expansion in eastern India through a new grinding mill at the Arasmeta Cement Plant, supported by several debottlenecking programmes involving equipment upgrades, process improvements and internal capacity initiatives. These developments place Nuvoco on track to achieve total cement capacity of approximately 35 MMTPA. The company reported total income of Rs 11,362 crore in FY 2025-26, reflecting its continuing growth trajectory.

Nuvoco operates a diversified portfolio across three segments: Cement, Ready-Mix Concrete and Modern Building Materials. Its cement portfolio includes Concreto, Duraguard, Double Bull, PSC, Nirmax and Infracem, covering Ordinary Portland Cement, Portland Slag Cement, Portland Pozzolana Cement and Portland Composite Cement. Its pan-India RMX business provides value-added products under Concreto for performance concrete, Artiste for decorative concrete, InstaMix for ready-to-use bagged concrete, X-Con covering M20 to M60 grades, and Ecodure for specialised green concrete. Nuvoco has supplied materials to projects including the Mumbai-Ahmedabad Bullet Train, Birsa Munda Hockey Stadium in Rourkela, Aquatic Gallery at Science City in Ahmedabad, and metro railway projects in Delhi, Jaipur, Noida and Mumbai.

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Concrete

Green Construction Through Cement Innovation

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Indian Cement Review (ICR) and Fuller Technologies brought industry, policy and technology leaders together to discuss how cement innovation can drive green construction at scale, writes Rakesh Rao.

India is building at a pace few countries can match. Highways, airports, housing, logistics parks, industrial corridors and urban infrastructure are reshaping the country’s economic geography. But beneath this growth story lies a difficult question: can India continue to build at scale without locking itself into a high-carbon future?

That question formed the core of an online panel discussion titled “Driving Green Construction Through Cement Innovation”, organised by Indian Cement Review (ICR) in association with Fuller Technologies as the Presenting Partner on June 25, 2026. The webinar brought together experts from cement technology, R&D, global industry platforms, building performance policy and international development cooperation to examine how low-carbon cement and material innovation can accelerate India’s green construction transition.

The discussion came at a crucial time. India has committed to achieving net-zero emissions by 2070 and reducing the carbon intensity of its economy by 45 per cent by 2030. At the same time, the country’s construction sector is expanding rapidly, driven by urbanisation, infrastructure development, housing demand and industrial growth. Cement, as one of the most widely used construction materials, sits at the heart of this transition. It is indispensable to development, but also central to the challenge of reducing embodied carbon in buildings and infrastructure.

Moderated by Nitika Krishan, Senior Urban Infrastructure and Sustainable Policy Consultant, the panel featured:

  • Kiranmai Sanagavarapu, Director, Low Carbon Solutions, Fuller Technologies;
  • Dr Hemantkumar Aiyer, VP and Head R&D, Nuvoco Vistas Corp Ltd;
  • Devika Wattal, Innovation Lead, Global Cement and Concrete Association (GCCA);
  • Dr Sunita Purushottam, MD, GBPN India (Global Buildings Performance Network); and
  • Vaibhav Rathi, Senior Technical Advisor, GIZ (the German Agency for International Cooperation)

Setting the tone for the discussion, Nitika Krishan underlined the scale of the challenge before the sector. “The question before us is no longer whether we build, but how we build sustainably,” she said. She pointed out that construction accounts for nearly 40 per cent of global energy-related carbon emissions when both operational and embodied carbon are considered. Cement production, she added, remains one of the hardest industrial processes to decarbonise.

For India, this is not merely an environmental issue. It is a development issue, a competitiveness issue and increasingly, a market issue. As one of the world’s largest cement producers and among the fastest-growing construction markets, India’s material choices will influence the carbon trajectory of its built environment for decades. As Krishan observed, sustainability solutions in economies such as India must not remain limited to laboratory success. They must be scalable, commercially viable and practical at national level.

The innovation gap: From technology to market

Experts believe that there is a need to bridge the innovation gaps for making decarbonisation in cement and concrete scalable. Devika Wattal of GCCA, explained, “The starting point must be the core cement manufacturing process itself. The first and foremost is the heart of our process, the heart of cement manufacturing. How do we reduce clinker? That is always a topic where industry is working very intrinsically.”

Clinker reduction remains one of the most important pathways for lowering emissions in cement. Since clinker production is energy-intensive and chemically emits carbon dioxide, reducing the clinker factor through supplementary cementitious materials (SCMs), blended cements and new chemistries can have a significant impact. Wattal also noted that carbon capture, utilisation and storage (CCUS) will have a role, though it may not be the first lever for all markets.

However, she stressed that innovation cannot stop at technology development. A solution that works in the lab must also be adaptable to industry, scalable in production and acceptable in construction practice. “It is important for that innovation to be adaptable, to be scalable, and so that it can be executed in real time,” she said.

Wattal also called for stronger enabling systems around innovation. These include performance-based standards, product-level embodied carbon databases and clearer frameworks for evaluating green materials. Without these, low-carbon cement products may struggle to compete with conventional materials in procurement and design.

R&D must balance carbon, cost and performance

Bringing in the R&D perspective into the discussion, Dr Hemantkumar Aiyer of Nuvoco Vistas emphasised that low-carbon cement development cannot be treated as a single-variable exercise. Cement must perform in real construction conditions. It must deliver strength, durability, consistency and cost competitiveness, while also reducing carbon.

“The root of understanding and balancing all these aspects lies in materials, and knowing the materials,” he said.

According to Dr Aiyer, R&D teams must understand the variability of raw materials such as fly ash, slag and clinker. Different sources produce different material behaviours. This makes mix optimisation, material characterisation and processing-property relationships critical. When performance is affected, cement manufacturers must understand how strength enhancers, admixtures and other performance chemicals interact with the material system.

He also linked material science with process efficiency. Clinkerisation takes place at extremely high temperatures, around 1,400 to 1,450 degrees Celsius. Any improvement in raw mix design, process control or energy optimisation can, therefore, help reduce emissions and cost. Dr Aiyer pointed to artificial intelligence-based optimisation, Cement 4.0 tools and advanced software as important enablers for real-time process and material control.

“The more you understand the materials, the more you can control it,” he said.

LC3: The promise is proven, the sequencing is not

Limestone calcined clay cement, commonly referred to as LC3, has attracted global attention because it can reduce clinker content significantly by using calcined clay and limestone while maintaining performance in many applications. Kiranmai Sanagavarapu of Fuller Technologies said the technology itself has already moved beyond proof of concept. Fuller Technologies has worked with calcined clay technology for nearly two decades and has seen plants running in France and Ghana. These plants, she said, are meeting local and national specifications, while the economics are beginning to make sense.

“The calciner is performing, the economics is stacking up, it is making business sense to produce,” she said.

But if the technology is viable, why has adoption not scaled faster? For Sanagavarapu, the answer lies in project sequencing. Too often, clay characterisation happens after equipment is specified. This, she warned, is a backward approach because calciner design depends on clay mineralogy, kaolinite content, iron levels, reactivity, moisture and other variables.

“If you don’t know what your deposit looks like before you commit for the equipment, you are, in a way, going blind into designing,” she said.

She also identified permitting and plant integration as major bottlenecks. Environmental clearances, mining permissions and local regulatory approvals must begin early. Similarly, calcined clay must be integrated into existing grinding, blending and logistics systems from the design stage, not treated as an afterthought during commissioning.

India already has IS 18189:2023 standard for LC3, but Sanagavarapu pointed out that the standard is not yet visible enough in procurement documents. “The gap between what is technically being permitted and what the procurement is asking is the single biggest bottleneck,” she said.

In her view, successful scale-up depends on getting the sequence right: clay characterisation first, permitting in parallel, standards aligned with construction, and integration built into plant design.

India’s LC3 journey: Progress, but demand remains thin

Providing details of India’s LC3 commercialisation experience, Vaibhav Rathi of GIZ noted that JK Cement carried out the first commercial production of LC3 at its Rajasthan plant, followed by JK Lakshmi Cement three months later. These initiatives were supported by the International Climate Initiative of the Government of Germany, with IIT Delhi contributing deep institutional knowledge on LC3 research and BIS certification.

Rathi said India’s early experience has produced clear lessons. One of the biggest was the need to build capacity among regulators. While BIS certification existed, State Pollution Control Boards were unfamiliar with the technology and unsure about the approval pathway.

“The capacity building is not just needed amongst the producer and the users of the cement, but also the regulators who are working with this technology for the first time,” he said.

He also highlighted the need for better information on China clay deposits. Since China clay is currently classified as a minor mineral, centralised data on availability, quality and location is limited. If cement manufacturers are to adopt LC3 at scale, stronger mineral intelligence will be important.

The third issue is demand. LC3 has already been used in projects such as Palava City in Mumbai and Noida International Airport, but these remain limited examples. “It is in a chicken and egg situation,” Rathi said. “Cement companies are saying we need more demand, and users are saying there is not enough cement available.”

Public procurement, he suggested, could help break this cycle. If agencies such as CPWD and other public bodies begin testing, accepting and specifying LC3, it could create the market confidence needed for cement companies to invest in production and storage.

Building codes must catch up with innovation

Dr Sunita Purushottam of GBPN India argued that material choices will determine built environment emissions over the long term, but India’s current policy signals remain fragmented. Although LC3 has received BIS recognition, she pointed out that building codes, municipal bylaws, schedules of rates and sustainability codes do not yet provide uniform guidance on low-carbon cement.

“The current cement regulations are largely prescriptive and favouring traditional materials,” she said. This limits the ability of alternative materials to compete on performance, durability and emissions.

Dr Purushottam also raised the issue of taxation. Cement, including LC3, currently falls under the same GST bracket as conventional cement. A differentiated tax structure, she argued, could help accelerate market adoption. “In order for the market to demand LC3, that differentiation in the GST could go a long way,” she said.

She noted that green building certifications such as IGBC and GRIHA are already creating demand for low-carbon materials by assigning points for embodied carbon and sustainable material use. However, she said large-scale adoption will require regulatory mandates, particularly through building codes and state-level notifications.

She also cautioned that low-carbon cement alone does not solve the entire building performance problem. A material may reduce embodied carbon, but the operational carbon of a building depends on thermal performance, design, insulation and energy use. “The energy part has two elements,” she said. “One is the embodied carbon of the material itself, and the other is the operational carbon.”

Collaboration is the bridge between invention and impact

Wattal said GCCA sees innovation as a strategic priority and works through platforms that connect industry with academia and start-ups. “There is no way we will decarbonise our sector without innovation,” she said.

However, she stressed that research must be connected to actual industry challenges. Innovations developed in isolation may fail when they encounter real-world barriers such as raw material variability, plant integration, cost, standards and finance. Start-ups, too, need industry mentorship and scale-up pathways.

Wattal also flagged the importance of finance. Even strong technologies may struggle to attract investment if there is no common understanding of bankability. “We have always put projects into, is this a bankable project? But the definition of a bankable project has never been defined,” she said.

For India, she saw strong potential in its academic and start-up ecosystem, but said the challenge lies in alignment and prioritisation. The country has the research base, industrial capacity and market size. What it now needs is a coordinated route from innovation to deployment.

There is a practical concern for cement manufacturers: how can existing plants be adapted for lower emissions without compromising reliability or commercial viability?

Kiranmai Sanagavarapu addressed, “The reliability risk in calcined clay retrofit is definitely real, but it is almost always self-inflicted. The risk arises when a new process is added to an existing circuit without properly redesigning grinding and blending configurations.”

Existing cement plants, she explained, can take two broad routes. The first is external sourcing of calcined clay combined with mill optimisation. This requires lower capital investment and can potentially move in 12 to 18 months if other conditions are in place. It may reduce emissions by around 20 to 30 per cent. The second route is integrated calcination on site, which requires higher capital expenditure and longer lead times, but provides greater control over quality, supply and emissions reduction potential.

For Sanagavarapu, the principle is simple: low-carbon retrofits must be designed with intent. “Design it with an intent properly from the start. Start in the market conditions where the economics are already working,” she said.

Circularity: The overlooked advantage

According to Vaibhav Rathi, fly ash and slag are already well established in cement and construction (C&D), but construction and demolition waste remains underutilised. “C&D waste is a growing business opportunity which not many have taken up,” he said. India’s continuous construction and demolition activity creates huge volumes of waste, much of which contributes to air pollution, land degradation and material inefficiency. With the right processing and standards, this waste can be converted into useful construction products.

Rathi also pointed out that LC3 has a circular economy dimension that is often overlooked. It can use low-grade kaolin-rich clay left behind after high-grade clay is extracted for other applications. “LC3 is not only a low-carbon solution, but also a circular economy solution,” he said.

At the same time, he cautioned that LC3 in India is not yet cheap because it has not reached scale. Site-specific techno-commercial feasibility studies, supported jointly by development agencies and industry, could help companies assess whether LC3 production makes technical and financial sense at a given location.

Dr Purushottam added that India must address both low-carbon cement and construction waste together. “Both low-carbon cement and C&D waste go hand in hand. India does not have an option but to work on both,” she said.

Dr Aiyer called for policy shifts from both government and industry, including preferential purchasing of sustainable materials, minimum supplementary cementitious material requirements in public and public-private projects, and faster regulatory implementation. “If we can fast-track the regulatory standards and their implementation on the ground, that is the way to go,” he said.

From green ambition to green construction

Cement innovation is no longer only about chemistry. It is about systems. Low-carbon cement will scale only when technology, standards, procurement, finance, regulation, education and construction practice move together.

LC3 and other low-carbon technologies have shown promise. India has early commercial examples, strong research capability and growing market interest. But mainstream adoption will depend on whether demand can be created, regulators can be capacitated, standards can be embedded in procurement, and manufacturers can see a clear business case.

For a country building at India’s scale, the opportunity is enormous. Cement will continue to be central to infrastructure and urban development. The challenge now is to ensure that the cement used in India’s growth story carries a lower carbon burden.

  • Rakesh Rao

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