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In Wonder Land

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RK Marble Group transformed Bhatkotri, a small village in Nimbahera, Rajasthan, into a township along with its modern cement plant that was set up in 2012. ICR visited this Wonder Cement facility to understand the specialities of the plant and infrastructure.

Part of the RK Marble Group, Wonder Cement is a greenfield project, a fully automated plant with world-class technology, anchored by a group of experienced entrepreneurs from the house of the Patnis, better known as the marble family in the country. Built with a cutting – edge technology, this state-of-the-art project has made its footprint in the burgeoning market of cement industry in the country within a short span of three years. It is the only plant in North India and among the few in India which is fully automated with the latest world-class technology from ThyssenKrupp and Pfeiffer, a German technology major.

The project was commissioned in April 2012 with an installed capacity of 3.25 million tonne per annum (mtpa) of cement. "This plant was conceptualised in 2010 and built in record time of 18 months, whereas normal period to construct similar plant, according to consultants and major companies, is 28-32 months. We completed the project in 18 months for clinkerisation and 21 months for cement production," says SM Joshi, President – Works, Wonder Cement.

A futuristic plant
Wonder Cement is a plant of 21st century, fully automated with the latest German technology and quality control by Automated Po-Lab (Robotic Lab) with AQCNET Software. The plant is centrally controlled and there are various technological features which are hallmarks of the latest technical developments.

There are various other features which are the hallmarks of the latest technology in the international market. Raw material acquisition and refining, considered to be the most important stages in cement production, are carried out by VRM technology, supplied and installed by Pfeiffer while equipment for processing and clinker grinding has been done by ThyssenKrukpp. Latest packaging technology has been also installed at the plant. Other auxiliary equipment have been sourced from the best vendors in the industry.

"When the plant was being coneptualised, our Chairman wanted to give the best product out of the facility. Therefore we selected machinery from ThyssenKrupp and Pfeiffer, Germany," Joshi explains.

Vivek Patni, Director, Wonder Cement, says, "When we were conceptualising this plant, we kept all provisions for modernisation and future expansions. Our infrastructure is suitable for supporting additional capacity. While planning the infrastructure, we were having consultants for architecture and landscaping. You can see the results here. We have very well planned buildings, roads, and landscaping which is difficult to find in other cement manufacturing facilities.

Raw materials mining
Wonder Cement has an installed capacity of 3.25 mtpa of cement, for which 3.75 mtpa ROM (Run-Of-Mine) limestone is required. The company has two mining leases known as Bhatkotari lime stone mines. The total area of mines is 7.4093 sq km. In the mines, there are more than 506 million tonne proved reserves and more than 25 million tonne probable reserves. The total mineable reserves are more than 477 million tonne. Open cast mining is done in both the mines. Chittorgarh area in Rajasthan is known for its superior quality lime stone deposits, possessing high lime content that gives high early strength and ultimate long term strength. Another characteristic feature of this lime stone is low alkali, low magnesia and low chloride contents which are highly desirable parameters for concrete durability.

Crushing and screening
ROM up to maximum feed size of 1.1×1.0x1.0 cu m is dumped in crusher dump hopper. Speed regulated apron conveyor below the dump hopper feed this material to grizzly feeder. The -80 mm material goes to the screening plant and +80 mm material is fed to impactor having the capacity of 1,600 tph. Impactor reduces the size to 75 mm. In screening plant, -10 mm material (mainly containing clay) is separated and rejected. Rest +10 mm material is again mixed with crusher main product. This mixed material is stored in surge bin. From surge bin, this material is fed to limestone stacker through apron conveyor and belt conveyors. For better blending, the material is stacked in layers in yard with the help of stacker. Pile formation takes place in Chevron method. And online quality control by cross belt analyser, which is the world?s best Combi CBA having CNA technology also, which is introduced in India for the first time. Approximately 93-95 per cent of materials, limestone and marl, is used from captive mines for the preparation of raw mix for manufacturing the desired quality of clinker. The other additives (5-7 per cent) used after pre-blending by stacker and reclaimer to control the moduli values in the mix. To get consistent quality of in process material, pre-blending equipment are installed for each raw material.

Raw material grinding
The state-of-the-art technology adopted at the plant consists of vertical roller mill of Pfeiffer, Germany, for grinding raw material to achieve the optimum fineness, and controlled particle size distribution of raw material particles. The capacity of the raw mill is 550 tph. After the complete process, the finely ground raw material is collected in a set of cyclones installed after the mill. Through air slides below multicones, the product is transported to silo with the help of elevator. The dust-laden air after multiclones is de-dusted in the bag house.

Coal grinding
For grinding of petcoke/coal, again there is a vertical roller mill having capacity of 35 tph. The operation of this mill is same as in the raw mill. The only difference is to have a constant watch over the mill outlet temperature to avoid any explosion and dust laden gases are de-dusted in bag house.

Pyro processing
Wonder Cement plant has a 75 m long kiln having diameter of 5 m for manufacturing OPC clinker supplied by Polysius ThyssenKrupp. The clinker is produced by burning the finely ground raw meal known as kiln feed in a rotary kiln. The temperature in the burning zone is usually 1,400-1,450oC and the residence time in the kiln is 15 minute. The process taking place in the kiln system consist of a temperature dependent decomposition of the raw material minerals according to the nature, followed by a recombination of the liberated free reactive oxides forming clinker minerals. The overall chemical reactions transforming the mixture of raw material minerals in the raw meal to the mixture of the clinker minerals in the clinker is endothermic (heat consuming). The clinker formed in kiln is cooled inside the polytrack cooler from 1,450oC to around 110oC and then it is stored in clinker silo having a storage capacity of 45,000 tonne.

Cement grinding
The final manufacturing stage at a cement plant is the grinding of cement clinker from the kiln, mixed with gypsum, into a fine powder.

It is important to obtain a certain specific surface for the finished cement so that hydration can take place and concrete strength develops within a reasonable time. In addition to the specific surface, also the particle size distribution influences the strength properties especially the late strength. At WCL, cement grinding circuit is having roll press with closed circuit single chamber ball mill.

At the outlet of the grinding mill, the ground material flows through an outlet grate to dynamic separator by mechanical conveyors, for fine separation as grinding system is closed circuit mill. Grinding in close circuit makes it possible to obtain a very finely ground cement. Another advantage is that it is easy to change from one grade of cement to another grade by adjustment of the separator speed. Cement produced in closed circuit mill has narrow particle size range and the quantity of 3 to 30 micron fraction is more in comparison to open circuit mill, resulting in higher late strength. The mill ventilation air carries a small portion of the fine material, which is de-dusted in a highly efficient bag-house. Finished product with separator air is passed through multi-clones where finished product is separated and stored in cement silos with the help of mechanical conveyors.

Cement packaging
Cement is stored in four cement silos, extracted, bagged by three electronic roto packers of capacity 240 tph each with an accuracy of +50 gm and -0 gm, and transported by trucks.

Quality product
Wonder Cement produces three grades of cement: OPC 43, 53 and PPC. Joshi claims, "We produce much higher strength cement than what is required by BIS. Our 53 grade cement is giving a strength of 68-70 Mpa against a requirement of 53 Mpa. The 53 Mpa strength is required after 28 days of setting time. Our cement crosses 53 Mpa in eight days and reaches 68-70 Mpa in 28 days. This type of performance is not available in any other cement in India. This is achieved due to very narrow and uniform particle size distribution of our cement and exceptionally good quality control system."

The market
The present capacity of the plant is 3.25 million tonne per annum (1,80,000 bags per day). The company has a wide network of 2,500 dealers who keep and maintain the supply chain in Rajasthan, Gujarat, Madhya Pradesh, Haryana, Uttar Pradesh, Delhi and Punjab. The company has a team of over 500 dedicated professionals. "We sell 50 per cent of our production in Rajasthan itself. Remaining 50 per cent is sold in the other states adjoining Rajasthan. Right now we are focusing on in and around Rajasthan because the best realisation is available at shortest distance. If you start sending cement to longer distances the realisation will be less," observes Patni.

Captive power
To ensure uninterrupted power supply to its plant in Nimbahera, the company has installed a captive power plan of 40 MW. The power plant uses petcoke as fuel sourced from IOC?s Baroda plant and Jamnagar refineries of Essar and Reliance. "We always use petcock as fuel for our power plant which is economical. In this area it is almost 25-30 per cent cheaper compared to other fuels," Joshi informs.

Keen on Green
The plant has complied with the norms of the environment ministry. The entire design of the plant is based on the latest environment norms, with the help of reverse air bag house and ESP and a number of nuisance bag filters installed having emission of much below the permissible unit. That enables the plant to be clean and dust free. An ecological balance has been maintained through massive plantation and development of ornamental gardens in the areas around the plant site. A fair measure of company?s concern on environmental issue is seen in the plantation of 55,000 tree saplings in 50 hectare in two years against a target of 75 hectare in 20 years.

Expansion plans
Wonder Cement has drawn up an ambitious expansion plan to double the production capacity in the next two years. The company has plans to expand its current capacity to 10 million tonne in due course by setting up a second and third production lines, for which land and layouts are ready. "Our second line is under execution with an expenditure of about Rs 1,200-1,400 crore. It will be ready by end of 2015," Joshi sums it up.

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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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