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Our data-driven approach optimises processes

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Tarun Mishra, Founder and CEO, Covacsis Technologies, speaks about how IoT and Industry 4.0 principles are revolutionising the cement industry, enhancing both operational and financial efficiency.

Covacsis Technologies has made significant strides in optimising operational and financial efficiency in real time. Can you provide an overview of how your technology framework integrates IoT and Industry 4.0 principles to achieve this?
Manufacturing shop floor will be more and more algorithm driven. In the time to come, the share of mainstream software technology will grow disproportionally in the machine. Covacsis Technologies has transformed operational and financial efficiency in the cement industry by integrating IoT and Industry 4.0 principles into our technology framework. Our approach leverages IoT devices to gather comprehensive data from various stages of cement production, which is then analysed using advanced data analytics and machine learning algorithms to deliver real-time insights and predictive analytics.

Key elements of our technology framework for the cement industry include:

  • Plug-and-play solution: Our system is designed for seamless integration and rapid deployment, often within three weeks, making it adaptable to various manufacturing environments.
  • Controller-agnostic data collection: IoT devices capture data from multiple sources within the cement manufacturing process, including temperature, pressure and flow metrics.
  • Advanced data analytics: Our framework processes collected data using sophisticated analytics and machine learning algorithms to enhance operational efficiency and predict maintenance needs.
  • Real-time insights: Continuous monitoring and analysis provide immediate insights, enabling swift adjustments to optimise performance and minimise downtime.
  • Key KPIs: We focus on key performance indicators such as overall equipment effectiveness (OEE), energy consumption and production rates, specifically tailored to the cement industry’s needs.

By applying these principles, Covacsis Technologies enables the cement industry to operate with greater agility, efficiency, and sustainability, driving significant improvements in operational and financial performance. Our data-driven approach optimises processes and make them future-ready.

How does Covacsis tailor its advanced analytics suite specifically for the cement industry, and what unique challenges in this sector does your technology address?
Covacsis has a farm of algorithms developed for end-to-end cement industry value stream from mines to dispatch. For example, mining operations have different operational challenges compared to kiln operation or mills operation. Covacsis’ IPF has hundreds of algorithms developed for mining, milling, kiln (dry vs wet process), bagging and despatch to address hyper local challenges related to productivity, quality, cost, safety and ESG.
Here are some of the illustrative use cases of Covacsis Intelligent plant framework in the
cement industry:

  • Grade-wise performance: IPF provides real-time comparisons of key performance indicators
    (KPIs) and asset performance during the manufacture of different cement grades using the same equipment. This helps in understanding and optimising performance across various
    product lines.
  • Specific power consumption breakdown: IPF integrates with energy management systems (EMS) to provide a detailed breakdown of power consumption by different drives and motors. It uses a root cause analysis (RCA) approach to identify which circuits or motors are consuming excess power and the reasons behind it. This insight helps in reducing overall power consumption and optimising energy efficiency.

Further to that Covacsis IPF offers a macro layer of algorithms, which cuts across the equipment and processes to analyse how kiln operation is likely to affect cement mills operational efficiencies or how change in C3S percentage will affect specific coal consumption of the kiln operation. In case of large enterprises with multiple plants spread across geographies, Covacsis Enterprise algorithms help management to see live heat maps of productivity, quality, cost, safety and ESG performances of individual plants in their supply chain network.

Your analytics suite offers dynamic decision-making capabilities in real time. Can you share examples of how this has improved operational efficiency in cement manufacturing plants?
Example1: Usually in the cement industry an hourly or two hourly sample of clinker is taken to the lab for multiple tests. Lab takes a couple of hours to publish the results. Between sample and test results there is a gap of 2-3 hours. If there were any abnormalities, let’s say a change in C3S percentage, in the sample can be acted upon only after test results are published.
Covacsis’ IPF algorithm will forecast C3S in real time and in case of any sensed abnormalities it will do detailed RCA to identify the variables which are potentially affecting C3S percentage negatively. This RCA is done by algorithm in real time and shared with process, quality and other stakeholders automatically to bring their attention to the ongoing or potential abnormalities. Such real time analysis helps the team to take immediate action rather than taking action after three hours.
Example 2: How the motor RPM, pressure difference in a vertical mill, table revolution speed and temperature difference together are affecting the fineness of the cement in a VRM. Covacsis has an off the shelf algorithm to do so for individual products such as OPC43, OPC53, PPC, etc.

Some of the other examples are listed below:
Real-time root cause analysis (RCA) and KPI computation:

  • Provides detailed insights into power consumption across different lines, products and operators.
  • Enables targeted actions to optimise energy usage.

A. Fuel savings/quality improvement: Real-time interventions in coal feed and monitoring of clinker quality parameters like C3S lead to substantial energy savings, typically ranging from 5-10 per cent.
B. Efficiency tracking of waste heat recovery systems (WHRS): Continuously monitors
the efficiency of WHRS, optimising energy recovery processes.
C. Alternative fuel and raw (AFR) material utilisation: Tracks and assesses the benefits of AFR usage, contributing to operational excellence and sustainability.

What are the key steps involved in implementing Covacsis’ technology in a cement factory? How do you ensure seamless integration with existing systems and processes?
Covacsis’ Intelligent Plant Framework (IPF) is a plug and play solution with advanced analytics capabilities. The vision is to create an agile, efficient and environmentally responsible manufacturing operation by leveraging the power of collaboration and data analytics. Below are the steps involved in implementing Covacsis’ IPF on the plant shop floor:

Site visit and kick-off meeting

  • Covacsis delivery team including the project manager, technical and functional expert plan a thorough study of the plant to understand the condition.
  • Post this Covacsis team plans a project kick off meeting with the relevant stakeholder to share a detailed project plan with timelines.

Real time data acquisition

  • Covacsis has indigenous library of more than ‘100’ drivers covering more than 97 per cent
    of Industrial control systems and its data acquisition capabilities covers non-standard controllers
    and protocols 100 per cent drivers are plug and play
  • Less than 2 hours to acquire data from a machine
  • The technical team maps out the data sources at the plant and established a connection with Covacsis edge gateway called LIU i.e. Local Interpreting Unit Real time data analytics
  • Covacsis’ functional experts maps out the requirement of the client for performing the real time analytics
  • Once the real time data starts flowing the Covacsis has industry wise pre-boxed analysis and KPI readily available that shall be customised according to users needs
  • It is inclusive of plug and play KPI and analysis around productivity, quality and cost
  • It takes less than 5 mins to configure a new KPI
  • IPF solution is inclusive of customisable stakeholder wise dashboard, report, alerts and notification
  • User has access to various trends, charts, six sigma analysis and compare engine to generate insights from the data

Post go-live support

  • Covacsis provides an ongoing support to the client Advanced analytics
  • Once the real-time data is visible, as a next step Covacsis involves senior consultants and industry experts to drive improvements and optimisations for key use cases.

AI and ML modelling
Based on the data analytics Covacsis also works on building AI use cases targeting the client needs. A few use cases encountered in the cement industry are:

  • Kiln efficiency prediction
  • Kiln breakdown forecasting
  • Coal mix optimiser

By following these steps, Covacsis ensures a seamless integration of their technology, enhancing the overall efficiency and productivity of cement manufacturing plants.

Machine learning and big data play crucial roles in your technology framework. How do these technologies enhance predictive maintenance and optimise production processes in the cement industry?
Data plays the most important role in any algorithm. Big data and fast data are only adding to the logistics performance of any algorithm and platform. Covacsis is a decade old and most mature platform in the world. Covacsis’ SaaS infrastructure is already handling more than 350 billion of cement process and operation data on a daily basis with a compounding daily growth rate of 1 per cent. This provides a significant advantage to Covacsis towards building algorithms and ensuring the value efficacy of these algorithms for the industry. This unparalleled capacity of Covacsis has encouraged multiple OEMs and cement plants to partner with them and realise the success in the quickest possible time without any gestation period.

What are some common challenges you encounter when digitising cement manufacturing operations, and how does Covacsis address these challenges?
Digitising cement manufacturing operations presents several common challenges. Covacsis addresses these challenges through innovative solutions and integrated technologies.

Here are the key challenges and how Covacsis tackles them:
Manual data and data present in different systems:
Challenge: Data spread across systems like DCS, EMS, LIMS, ERP and SAP makes it hard to consolidate and analyse.
Solution: Covacsis’ IOT solution LIUTM has got in-built capability to source data from all possible sources such as DCS, LIMS, Historians, ERP etc and bring it to one unified platform. The platform can also be integrated with energy meters or existing EMS systems as per applicability. Covacsis’ platform offers off-the-shelf digital logbooks to replace manual logbooks with 100 per cent digital logbooks. Covacsis guarantees that all types of data from disparate sources are captured in real time with zero or minimalistic manual intervention.
As per various global reports many digital projects globally are yielding low return because of ineffective IOT data layer. Covacsis on the contrary delivers zero risk to the project through its effective design and mature product spanned over decades and guarantees ROI.

Detrimental cost towards deploying sensors in the value stream
Challenge: Installing physical sensors throughout the plant can be expensive, time-consuming and reason for suboptimal ROI.
Solution: Covacsis employs soft sensors as preference to the hard sensors wherever applicable. These soft sensors are algorithms that use existing data sets in the plants to compute specific conditions and measurements. This reduces the need for additional hardware, cutting costs and simplifying implementation leading to high ROI.
Collaboration among different departments
Challenge: Siloed data and departmental operation practices can hinder effective communication and collaboration between departments
Solution: Covacsis’ IPF platform provides multiple perspectives about an event to different departments and its users in real time. Users across different departments and roles can do collaborative analysis and RCA of an event to make an appropriate decision. For example, how a certain coal mix is affecting the kiln zone temperature leading to quality of the clinker coupled with increased specific energy consumption.
This same incident may be of interest to the quality, production, energy and costing team. Covacsis provides corresponding analytics, a dashboard based on the departmental KPIs and specific analysis. These stakeholders then collaborate and brainstorm to find a common solution and have better alignment. Such collaboration in real time increases the plant efficiency significantly.

Inter plant performance benchmarking in case of similar assets and similar process
Challenge: Different plant data reside within the wall of individual plants. Comparing macroeconomic performance across plants is impossible.
Solution: Covacsis’ IPF is designed to aggregate multiple plant’s data at unified enterprise datalike (historian), which then further used for relative baselining and relative performance analysis across same and similar asset base or product or processes.

Digital upskilling and change management
Challenge: It’s not natural for a plant operation team to get in the groove of the digital mindset
quickly leading to very slow adoption with compromised ROI.
Solution: Covacsis’ lab offers a focused change intervention to ensure effective adoption in the fastest possible manner. A series of training workshops and programmes are organised to help staff transition to digital workflows, focusing on areas like real-time monitoring, energy management and predictive maintenance.

How do you envision the future of digitalisation in the cement industry?
What new technologies or advancements do you think will become integral to cement manufacturing?
The future of digitalisation in the cement industry is poised to revolutionise various aspects of production, significantly enhancing efficiency and sustainability.
Key advancements we foresee include:

Decarbonisation:

  • Digital technologies will play a crucial role in reducing carbon emissions throughout the production process. Advanced analytics and AI will help optimise processes, ensuring minimal CO2 output.
  • Implementing carbon capture and storage (CCS) technologies, integrated with real-time monitoring systems, will enable plants to manage and reduce their carbon footprint more effectively.

Power consumption:

  • The use of IoT sensors and AI-driven analytics will allow for more precise control of power usage, leading to significant energy savings.
  • Smart grids and renewable energy sources will become more prevalent, with digital systems managing energy flow to maximise efficiency and sustainability.

Effective use of alternative fuels and raw materials (AFR):

  • Digital tools will enhance the utilisation of alternative fuels and raw materials, ensuring optimal blending and maintaining high-quality cement production.
  • Predictive maintenance and real-time monitoring will reduce downtime and improve the overall efficiency of using AFR.

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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