Economy & Market
AFR can provide economic and environmental benefits
Published
1 year agoon
By
admin
Tushar Khandhadia, General Manager – Production, Udaipur Cement Works, in conversation with Kanika Mathur about the impact of AFR on efficiency and quality.
As the cement industry moves towardmore sustainable practices, alternative fuels and raw materials (AFR) play a crucial role in reducing carbon emissions and enhancing resource efficiency. In this exclusive interview, Tushar Khandhadia, General Manager – Production at Udaipur Cement Works, shares insights on how the company integrates AFR into its production process, the challenges involved, and the latest innovations driving sustainable cement manufacturing.
Which AFR does your company currently use in cement production?
Our organisation employs a variety of AFR to enhance sustainability and reduce our carbon footprint. These include:
- Alternative fuels: Waste-derived fuels such as municipal solid waste (MSW), tire-derived fuel (TDF), biomass, and industrial waste, waste mix for co-incineration LCV.
- Alternative raw materials: Industrial by-products like fly ash, f.f slag, jarosite chemical gypsum, granulated slag, bf dust, chemical sludge (waste water treatment, ETP sludge – solid, spent carbon, waste mix (solid)).
How do alternative fuels impact the efficiency and quality of cement?
While alternative fuels can provide economic and environmental benefits, they must be carefully managed to ensure that the final quality of the cement is not compromised. The key to optimising the impact of alternative fuels on cement production lies in the selection of the right types of fuels, proper blending, and controlling combustion conditions to maintain both efficiency and high-quality output.
Fuel characteristics
- Energy content: Alternative fuels (such as biomass, waste-derived fuels, or industrial by-products) often have lower energy content compared to traditional fuels like coal or pet coke. This means that more of the alternative fuel is required to achieve the same level of heat generation. As a result, more fuel needs to be burned, potentially increasing the overall heat consumption of
the kiln. - Moisture and volatile matter: Some alternative fuels have higher moisture content or volatile substances, requiring additional energy to evaporate the moisture or combust these volatile compounds. This can lead to a higher heat consumption during the combustion process.
- Burning efficiency: combustion characteristics: Different alternative fuels may burn at different rates or temperatures compared to traditional fuels, which could affect the kiln’s efficiency. Incomplete combustion of some alternative fuels might cause heat losses and thus increase the energy needed to maintain kiln operation.
- Clinker formation: Alternative fuels may affect the formation of clinker (the solid material produced in the kiln). If the composition or combustion characteristics of the alternative fuel cause uneven heating or changes in clinker quality, additional energy may be needed to stabilise the temperature or improve the quality of the clinker.
- Operational adjustments: process optimisation: When switching to alternative fuels, adjustments are often required to optimise the kiln’s operational parameters (like air flow, temperature control, etc.). Until these adjustments are fully optimised, the kiln may operate less efficiently, leading to higher heat consumption.
Impact on quality:
- Chemical composition: Some alternative fuels, such as those derived from industrial waste or hazardous materials, may introduce chemical compounds that can alter the final properties of cement. However, proper fuel management ensures that any potential adverse effects on cement quality are minimised.
- Clinker quality: The quality of the clinker, which is the key ingredient in cement, can be affected by the composition of the alternative fuels. Some alternative fuels may introduce impurities (such as chlorine or sulphur), which could lead to clinker quality issues, such as instability or the formation of undesirable compounds.
- Consistency in product: The use of alternative fuels can cause variations in the combustion process, which may lead to slight fluctuations in temperature and material composition. These inconsistencies could impact the final cement quality, though careful fuel selection and blending can mitigate these risks.
- Environmental impacts on quality: One of the advantages of using alternative fuels is their potential to reduce the carbon footprint of cement production. The reduction of CO2 emissions and other pollutants indirectly benefits the overall quality of the end product, as it promotes sustainability and cleaner production processes.
Environmental and sustainability considerations
- Lower CO2 emissions: By using alternative fuels, the cement industry can reduce its reliance on fossil fuels, thereby decreasing CO2 emissions. The use of waste materials like municipal solid waste or biomass can result in a carbon-neutral or lower-carbon cement production process.
- Waste reduction: AFR helps recycle waste materials, reduce landfill use and promote circular economy practices, which indirectly enhances the sustainability of the cement industry.
What challenges do you face in sourcing and utilising AFR?
Sourcing and utilising AFR in cement production comes with several challenges that must be addressed to ensure that the transition is both effective and sustainable. Below are the key challenges typically faced:
Fuel quality variability
- Inconsistent properties: AFRs such as waste materials, biomass or industrial by-products can vary significantly in their chemical composition, energy content, moisture levels and combustion characteristics. This inconsistency can complicate kiln operations, as cement plants are optimised for burning specific fuels like coal or petcoke. Variability in AFR can lead to issues with combustion efficiency, temperature control, and process stability.
- Contaminants: Some AFRs may contain unwanted contaminants (e.g., plastics, heavy metals, chlorine, or sulfur) that could affect both the kiln’s performance and the quality of the final product. These contaminants can increase emissions or cause equipment corrosion and premature wear.
Supply chain and availability
- Logistical complexity: Sourcing AFR requires a robust and reliable supply chain, as many alternative fuels come from waste streams that may not be consistently available. This variability in supply can lead to fluctuations in fuel availability, which may impact production schedules.
- Sourcing reliability: The availability of certain types of AFRs may be limited by geographic location, government regulations, or competing demands (e.g., the use of biomass for other industries or energy production). This can make it difficult to secure a stable and consistent supply of AFR, particularly in regions where waste recycling infrastructure is underdeveloped.
Storage and handling
- Storage issues: Some AFRs, especially organic or biomass-based fuels, may require specialised storage facilities to prevent degradation, moisture absorption, or contamination. Proper storage is necessary to maintain fuel quality and prevent losses due to spoilage.
- Handling challenges: Different AFRs require different handling techniques, such as shredding, drying or sorting, before they can be used in the kiln. This adds complexity to the operational process and may require investment in new infrastructure and equipment.
Regulatory and environmental concerns
- Compliance with regulations: The use of certain AFRs may be subject to stringent environmental regulations, particularly regarding emissions, waste management and fuel quality standards. Compliance with these regulations may require additional monitoring, testing and reporting, increasing operational costs and complexity.
- Emission control: Some alternative fuels may lead to higher levels of certain pollutants (e.g., dioxins, furans, or particulate matter) if not properly managed. Cement plants must invest in additional air pollution control technologies (e.g., scrubbers, electrostatic precipitators) to mitigate these emissions.
Technical adaptation of kilns and equipment
- Modification of existing systems: Cement plants may need to retrofit or upgrade their existing equipment (e.g., burners, air systems, or fuel handling systems) to efficiently utilise AFR. These modifications can be costly, time-consuming, and may require downtime.
- Impact on kiln efficiency: The combustion characteristics of AFR differ from those of traditional fuels, and improper adaptation can lead to inefficient burning, lower kiln temperatures and lower overall kiln throughput. Continuous monitoring and optimisation of the kiln operation are essential to ensure efficient use of AFR.
Cost and economic viability
- Initial investment: While AFRs can provide cost savings in the long term (especially if they are locally sourced or cheaper than conventional fuels), the upfront cost of modifying equipment, establishing fuel handling processes, and meeting regulatory requirements can be significant.
- Price fluctuations: The cost of alternative fuels can fluctuate based on market conditions, waste availability, and local competition for resources. Such variability in pricing may make it difficult to predict savings over time and could affect the economic feasibility of using AFRs.
Quality control of cement
- Impact on product consistency: The chemical composition of AFRs can affect the clinker quality and, in turn, the final cement product. Variations in the AFR may result in inconsistent burning conditions in the kiln, which can lead to variations in clinker mineral composition and final cement properties.
- Blending and optimisation: To ensure that product quality remains consistent, cement producers must carefully manage the blending of alternative fuels with traditional fuels. Finding the right balance and ensuring stable quality control requires detailed analysis and optimisation.
Public perception and social acceptance
- Concerns about waste incineration: In some regions, the use of waste-derived fuels in cement kilns may face resistance due to public concerns about the environmental and health impacts of burning waste. These concerns can affect the social acceptance of AFR use, particularly if local communities are not fully educated about the benefits of AFR in reducing waste and emissions.
- Brand reputation: Cement companies must also be mindful of their brand reputation when using waste-derived fuels. Public perception can play a significant role in the company’s market standing, especially in more environmentally conscious regions.
Long-term sustainability of AFR supply
- Sustainability of fuel sources: The long-term availability of certain types of AFR, such as biomass or waste-derived fuels, may be subject to factors like changing waste management practices, government policies, and market demand. Over-reliance on a single source of AFR could lead to supply chain disruptions or sustainability concerns in the future.
Strategies to overcome these challenges
To overcome these challenges, cement producers often adopt several strategies:
- Diversification of AFR sources: Relying on a mix of different AFR types (e.g., industrial by-products, biomass, municipal waste) can help mitigate supply risks and fuel quality issues.
- Partnerships and collaboration: Collaborating with waste management companies, municipalities, and regulatory bodies can help secure a reliable AFR supply and ensure compliance with regulations.
- Technology and monitoring: Investing in advanced combustion technologies, sensors, and control systems can help optimise AFR utilisation in the kiln, ensuring efficient combustion and minimising emissions.
- Training and skill development: Ensuring that staff are well-trained in handling and utilising AFRs can help minimise operational challenges and improve overall kiln efficiency.
While there are many challenges associated with sourcing and utilising AFR, many of them can be addressed with proper planning, technology, and management. The long-term benefits of using alternative fuels, including environmental sustainability and cost savings, often outweigh the challenges, especially with ongoing improvements in fuel handling and kiln optimisation.
How does AFR adoption contribute to cost savings and sustainability?
The adoption of AFR) in cement production can significantly contribute to both cost savings and sustainability. Here’s how:
Cost Savings
- Reduced reliance on expensive fossil fuels: Traditional fuels like coal or petcoke can be subject to volatile price fluctuations due to geopolitical factors or market changes. AFRs, such as industrial by-products, biomass, or waste materials, are often less expensive than conventional fuels. By switching to AFRs, cement producers can lower their overall fuel costs.
- Utilising waste streams: Many AFRs are waste products from other industries or municipal waste. Using these materials instead of purchasing new fuels reduces the cost of sourcing energy, as companies may even receive subsidies or payments for taking certain waste materials off their hands (e.g., biomass, plastics, tires).
- Reduced disposal costs: Cement plants can help reduce the cost of waste disposal for municipalities and industries by accepting waste streams as alternative fuels. Waste management and disposal can be expensive, and cement producers may receive financial incentives for taking in these materials.
- Operational efficiency: Local sourcing of AFRs can cut down transportation costs compared to importing traditional fuels from distant sources. If waste materials are available locally, their use in cement production can result in both cost savings and a smaller carbon footprint due to reduced transportation emissions.
- Energy efficiency gains with optimised kiln operations: AFRs, when properly integrated into cement production, can lead to more efficient energy usage. Some AFRs burn hotter or more efficiently than traditional fuels, improving the energy output per unit of fuel used. This means that the cement plant might be able to produce the same amount of clinker with less energy.
Reduction in carbon emissions
- Lower greenhouse gas emissions: One of the most significant benefits of AFR adoption is the reduction in CO2 emissions. Many alternative fuels have a lower carbon footprint than traditional fossil fuels. For instance, biomass can be considered carbon-neutral since the CO2 released during its combustion is roughly equivalent to the CO2 absorbed during the plant’s growth. Using waste materials that would otherwise decompose in landfills (producing methane, a potent greenhouse gas) also helps to reduce the overall carbon impact.
- Reduced reliance on fossil fuels: By replacing fossil fuels with renewable or waste-derived alternatives, cement producers reduce their overall consumption of non-renewable resources, helping to lower their carbon footprint and contribute to global sustainability goals.
Waste diversion
- Waste-to-energy: By using waste materials as fuel, cement plants contribute to waste diversion from landfills and incinerators. This process transforms waste into a valuable resource, helping to reduce the environmental impact associated with landfill usage and waste incineration, both of which are significant sources of pollution.
- Circular economy contribution: AFR adoption is an example of a circular economy model, where waste is transformed into valuable resources rather than being discarded. This contributes to the reduction of environmental pollution and promotes sustainability within industries.
- Resource conservation: By using alternative fuels instead of coal, oil, or gas, cement plants help preserve natural resources. Fossil fuels are finite, and their extraction can cause environmental degradation. By utilising AFRs, companies help reduce the pressure on extracting and depleting natural reserves.
- Reduced landfill impact: The cement industry can help alleviate the growing challenge of managing waste by using materials that might otherwise end up in landfills. For instance, tire-derived fuels, plastics, and even certain types of municipal solid waste can be repurposed in cement kilns, decreasing the amount of waste needing disposal and contributing to a reduction in landfill waste volume.
- Energy efficiency and lower resource consumption: Many AFRs, like biomass or waste oils, may have similar or higher calorific values than conventional fuels, contributing to better energy efficiency in the kiln process. This optimised energy use leads to a reduced need for fossil fuels and less overall consumption of resources, which contributes to sustainability efforts.
The adoption of AFRs in cement production delivers clear benefits in terms of cost savings (through reduced fuel and disposal costs, and energy efficiencies) and sustainability (by lowering emissions, reducing waste, conserving resources, and supporting a circular economy). While the transition to AFRs may require upfront investments in technology and infrastructure, the long-term economic and environmental benefits make it a key strategy for the cement industry to align with global sustainability goals, reduce operational costs, and enhance its competitive edge in an increasingly eco-conscious market.
Are there any recent innovations your company has implemented in AFR usage?
Yes, we have done several major projects for utilisation of AFR in our kiln.
Development of robust AFR handling systems: Innovations in AFR handling systems are enabling the safe and efficient use of various waste materials. Technologies such as pipe conveyors and precise metering systems ensure that different types of AFR can be fed into the kiln without environmental impact. These systems are designed to accommodate the varying characteristics of alternative fuels, providing comprehensive support from planning through operation to service and optimisation measures.
Real-time monitoring and quality assessment: Systems enable continuous monitoring of AFR quality, detecting anomalies and ensuring consistent fuel quality. This real-time analysis allows for immediate adjustments to the combustion process, optimising AFR utilisation.
Combustion optimisation through ML: Machine learning algorithms analyse kiln data to optimise combustion processes, ensuring complete fuel combustion and minimising waste. This leads to reduced fuel consumption, lower emissions and enhanced energy efficiency.
Economy & Market
Fornnax Names Lukas Baur as Authorised Service Partner to Bolster EU Operations
Published
5 days agoon
July 23, 2026By
admin
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.
Concrete
Nuvoco Vistas launches Limla cement plant, expands Gujarat footprint
Published
2 weeks agoon
July 13, 2026By
admin
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.
Concrete
Green Construction Through Cement Innovation
Published
4 weeks agoon
July 2, 2026By
admin
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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