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Economy & Market

Precast construction minimises material waste

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Ramesh Joshi, Business Head – RMC, Shree Cement, discusses how with innovation and quality control at their core, materials such as RMC, precast shapes and M-Sand are driving better project outcomes across the sector.

The construction industry is undergoing a major shift toward greater efficiency, sustainability and quality. Ready-Mix Concrete (RMC), precast shapes and M-Sand are at the forefront of this transformation, offering faster, cleaner and more reliable building solutions. Ramesh Joshi, Business Head – RMC, Shree Cement, sheds light on how these materials are redefining modern construction practices. From improving site safety to enhancing structural durability, they are shaping a more resilient future.

How does Ready-Mix Concrete (RMC) improve construction efficiency compared to traditional site-mixed concrete?
RMC has transformed the construction landscape by enhancing efficiency, quality and overall project performance. Unlike traditional site-mixed concrete, RMC is produced under controlled conditions, ensuring consistent strength and quality in every batch. This consistency leads to faster project completion and improved cost management, as the need for on-site mixing is eliminated.
A key advantage of RMC lies in its ability to reduce labor requirements and minimise material wastage. Its precise mix design enables accurate material estimation, helping contractors avoid over-ordering and surplus inventory, leading to better resource management and lower costs.
RMC also contributes to a safer and more organised work environment by reducing dust, noise and handling risks. Its superior strength and durability ensure longer-lasting structures, lowering maintenance and repair expenses over time. By combining consistency, efficiency and safety, RMC has become an essential element in modern construction, driving better project outcomes and long-term value.

What are the key advantages of using precast shapes in modern construction?
Factory-made precast elements have revolutionised modern construction by offering exceptional durability and weather resistance, ensuring long-term performance. Off-site manufacturing reduces on-site work, leading to faster project completion and lower labour costs. The design flexibility of precast elements allows architects to create innovative forms and finishes, enhancing the visual appeal of structures. Strict factory quality control ensures consistent strength and finish, improving overall construction reliability.
Precast construction minimises material waste, is highly cost-effective and sustainable, and supports eco-friendly building practices. Its ability to combine strength, efficiency and design versatility makes it ideal for modern infrastructure projects. The streamlined production process reduces delays and site disruptions, allowing for quicker turnaround times without compromising quality. Additionally, the reduced reliance on traditional on-site construction methods helps manage labor shortages and improve project timelines. Precast elements are a smart solution for building resilient, aesthetically pleasing and environmentally conscious structures.

How does M-Sand compare to natural river sand in terms of quality and performance?
M-Sand and river sand are both essential in construction, but they differ in quality and performance due to their source and production process. M-Sand is produced using VSI crushers in a controlled environment, ensuring consistent quality, particle size and strength. Its angular shape improves bonding and reduces segregation, enhancing the durability of concrete. In contrast, river sand, sourced naturally, often has inconsistent particle sizes and impurities that can weaken concrete strength. M-Sand offers greater consistency, strength and cost-effectiveness, making it a more reliable choice. Its sustainable production process also makes it environmentally friendly, addressing the issues of riverbed erosion and scarcity linked with river sand. The controlled production of M-Sand ensures minimal impurities and better gradation, reducing the chances of structural inconsistencies. Its uniform quality and enhanced strength make it a preferred option for high-performance construction, providing long-term durability and better structural integrity.

Are there any environmental benefits of using RMC, precast shapes, and M-Sand?
Using RMC, precast shapes and M-Sand provides substantial environmental benefits. RMC enhances resource efficiency by minimising material waste and reducing carbon emissions through controlled production and precise mixing. This improves energy efficiency and reduces the environmental footprint of construction projects. Precast shapes contribute to sustainability by reducing site waste and energy consumption during installation. Their enhanced durability and material efficiency result in longer-lasting structures, further lowering the environmental impact. M-Sand, produced from crushed rocks, reduces the need for river sand, helping to conserve riverbeds and protect aquatic ecosystems. Its consistent quality and controlled production ensure minimal impurities, enhancing structural strength while preserving natural resources. The use of M-Sand also reduces water consumption during mixing, making it a more sustainable alternative. Collectively, RMC, precast shapes and M-Sand promote eco-friendly construction by improving efficiency, reducing waste and conserving natural resources, reflecting a more responsible and sustainable approach to modern building practices.

What challenges do builders face when transitioning to these materials?
Builders face several challenges when transitioning to RMC, precast and M-Sand materials. For RMC, a fully skilled team is essential to handle mixing and application effectively. Significant investment in R&D is required to develop high-performance concrete products, while environmental regulations can add to operational complexity and costs.
In precast construction, identifying reliable vendors for high-end concrete products is crucial to achieving the required strength and finish within tight timelines. Training a specialised team or building internal expertise is necessary for successful execution. The use of heavy lifting machinery for handling and installing precast elements adds to the logistical demands. Additionally, large working spaces for production and storage are required, increasing infrastructure costs. Transitioning to M-Sand involves setting up quarries to meet large-scale demand while maintaining consistent supply. The quality of VSI crushers directly impacts sand grading, requiring regular maintenance of plants and machinery to ensure consistent production quality and performance.

How does the cost of RMC, precast shapes and M-Sand compare to traditional materials?
The cost of RMC, precast shapes and M-Sand varies compared to traditional materials, but the long-term benefits often outweigh the initial expenses. RMC typically comes at a premium, costing around 10 per cent to 20 per cent more per cubic meter than site-mixed concrete. However, its consistency, faster construction and reduced labor requirements make it a more efficient solution in the long run. Precast shapes, on the other hand, are more cost-efficient, offering savings of around 10 per cent to 20 per cent compared to traditional construction. The faster installation and reduced on-site labor requirements contribute to overall cost savings and quicker project completion. M-Sand stands out for its affordability, being 30 per cent to 50 per cent cheaper than river sand, depending on the location. Its controlled production ensures consistent quality and availability, reducing dependency on natural resources. While initial costs for RMC may be higher, the combined advantages of precast and M-Sand make them financially attractive and operationally efficient.

What innovations are shaping the future of these materials in construction?
Innovations in RMC, precast shapes and M-Sand are transforming construction with enhanced efficiency and performance. In RMC, high-end R&D in batching plants reduces space requirements and improves automation. Transit mixers with advanced sensors ensure smoother transit and better product regulation. Precast construction is benefiting from improved casting machines that require less manual intervention and high-tonnage heavy lifting equipment, making installation more efficient. For M-Sand, advancements in VSI crushers are producing better-graded sand, improving concrete strength and consistency. These innovations are driving greater precision, speed and cost-effectiveness in modern construction.

How do you ensure the consistent quality and reliability of these products?
Ensuring consistent quality and reliability in RMC, precast shapes and M-Sand requires a structured and focused approach. Continuous development and product optimisation play a key role in meeting specific project requirements and enhancing overall performance. By adapting to evolving construction needs, manufacturers can maintain high standards and improve product outcomes. Well-defined SOPs for production and execution ensure operational consistency. Random quality checks during production help identify and address deviations early, maintaining uniformity in product performance. This proactive approach minimises errors and enhances reliability.
Customer feedback through post-production surveys and satisfaction reviews provides valuable insights for continuous improvement. Addressing customer concerns promptly helps in refining processes and improving overall quality.

Economy & Market

TSR Will Define Which Cement Companies Win India’s Net-Zero Race

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Jignesh Kundaria, Director and CEO, Fornnax Technology

India is simultaneously grappling with two crises: a mounting waste emergency and an urgent need to decarbonise its most carbon-intensive industries. The cement sector, the second-largest in the world and the backbone of the nation’s infrastructure ambitions, sits at the centre of both. It consumes enormous quantities of fossil fuel, and it has the technical capacity to consume something else entirely: the waste our cities cannot get rid of.

According to CPCB and NITI Aayog projections, India generates approximately 62.4 million tonnes of municipal solid waste annually, with that figure expected to reach 165 million tonnes by 2030. Much of this waste is energy-rich and non-recyclable. At the same time, cement kilns operate at material temperatures of approximately 1,450 degrees Celsius, with gas temperatures reaching 2,000 degrees. This high-temperature environment is ideal for co-processing, ensuring the complete thermal destruction of organic compounds without generating toxic residues. The physics are in our favour. The infrastructure is not.

Pre-processing is not the support act for co-processing. It is the main event. Get the particle size wrong, get the moisture wrong, get the calorific value wrong and your kiln thermal stability will suffer the consequences.

The Regulatory Push Is Real

The Solid Waste Management (SWM) Rules 2026 mandate that cement plants progressively replace solid fossil fuels with Refuse-Derived Fuel (RDF), starting at a 5 per cent baseline and scaling to 15 per cent within six years. NITI Aayog’s 2026 Roadmap for Cement Sector Decarbonisation targets 20 to 25 per cent Thermal Substitution Rate (TSR) by 2030. Beyond compliance, every tonne of coal replaced by RDF generates measurable carbon reductions which is monetisable under India’s emerging Carbon Credit Trading Scheme (CCTS). TSR is no longer a sustainability metric. It is a financial lever.

Yet our own field assessments across multiple Indian cement plants reveal a sobering reality: the primary barrier to scaling AFR adoption is not waste availability. It is the fragmented and under-engineered pre-processing ecosystem that sits between the waste and the kiln.

Why Indian Waste Is a Different Engineering Problem

Indian municipal solid waste is not the material that imported shredding equipment was designed for. Our waste streams frequently exceed 40 per cent to 50 per cent moisture content, particularly during monsoon cycles, saturated with abrasive inerts including sand, glass, and stone. Plants relying on imported OEM equipment face months of downtime awaiting proprietary spare parts. Machines built for segregated, low-moisture waste fail quickly and disrupt the entire pre-processing operation in Indian conditions.

The two most common failures we observe are what I call the biting teeth problem and the chewing teeth problem. Plants relying solely on a primary shredder reduce bulk waste to large fractions, but the output remains too coarse for stable kiln combustion. Others attempt to use a secondary shredder as a standalone unit without a primary stage to pre-size the feed, leading to catastrophic mechanical failure. When both stages are present but mismatched in throughput capacity, the system becomes a bottleneck. Achieving the 40 to 70 tonnes per hour required for meaningful coal displacement demands a precisely coordinated two-stage process.

Engineering a Made-in-India Answer

At Fornnax, our response to these challenges is grounded in one principle: Indian waste demands Indian engineering. Our systems are built around feedstock homogeneity, the holy grail of kiln stability. Consistent particle size and predictable calorific value are the foundation of stable kiln combustion. Without them, no TSR target is achievable at scale.

Our SR-MAX2500 Dual Shaft Primary Shredder (Hydraulic Drive) processes raw, baled, or loosely mixed MSW, C&I waste, bulky waste, and plastics, reducing them to approximately 150 mm fractions at throughputs of up to 40 tonnes per hour. The R-MAX 3300 Single Shaft Secondary Shredder (Hydraulic Drive), introduced in 2025, takes that primary output and produces RDF fractions in the 30 to 80 mm range at up to 30 tonnes per hour, specifically optimised for consistent kiln feeding. We have also introduced electric drive configurations under the SR-100 HD series, with capacities between 5 and 40 tonnes per hour, already operational at a leading Indian waste-processing facility.

Looking ahead, Fornnax is expanding its portfolio with the upcoming SR-MAX3600 Hydraulic Drive primary shredder at up to 70 tonnes per hour and the R-MAX2100 Hydraulic drive secondary shredder at up to 20 tonnes per hour, designed specifically for the large-scale throughput that higher TSR ambitions require.

The Investment Case Is Now

The 2070 Net-Zero target is not a distant goal for India’s cement sector. It starts today, with decisions being made on the plant floor.

The SWM Rules 2026 are already in effect, requiring cement plants to replace coal with RDF. Carbon credit markets are opening up, and coal prices are not going to get cheaper. Every tonne of coal a cement plant replaces with waste-derived fuel saves money on one side and generates carbon credit revenue on the other. Pre-processing infrastructure is no longer just a compliance requirement. It is a business investment with a measurable return.

The good news is that nothing is missing. The technology works. The waste is available in every Indian city. The government has provided the policy direction. The only thing standing between where the industry is today and where it needs to be is the commitment to build the right infrastructure.

The cement companies that move now will not just meet the regulations. They will be ahead of every competitor that waits.

About The Author

Jignesh Kundaria is the Director and CEO of Fornnax Technology. Over an experience spanning more than two decades in the recycling industry, he has established himself as one of India’s foremost voices on waste-to-fuel technology and alternative fuel infrastructure.

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Concrete

WCA Welcomes SiloConnect as associate corporate member

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The World Cement Association (WCA) has announced SiloConnect as its newest associate corporate member, expanding its network of technology providers supporting digitalisation in the cement industry. SiloConnect offers smart sensor technology that provides real-time visibility of cement inventory levels at customer silos, enabling producers to monitor stock remotely and plan deliveries more efficiently. The solution helps companies move from reactive to proactive logistics, improving delivery planning, operational efficiency and safety by reducing manual inspections. The technology is already used by major cement producers such as Holcim, Cemex and Heidelberg Materials and is deployed across more than 30 countries worldwide.

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Concrete

TotalEnergies and Holcim Launch Floating Solar Plant in Belgium

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TotalEnergies and Holcim have commissioned a floating solar power plant in Obourg, Belgium, built on a rehabilitated former chalk quarry that has been converted into a lake. The project has a generation capacity of 31 MW and produces around 30 GWh of renewable electricity annually, which will be used to power Holcim’s nearby industrial operations. The project is currently the largest floating solar installation in Europe dedicated entirely to industrial self-consumption. To ensure minimal impact on the surrounding landscape, more than 700 metres of horizontal directional drilling were used to connect the solar installation to the electrical substation. The project reflects ongoing collaboration between the two companies to support industrial decarbonisation through renewable energy solutions and innovative infrastructure development.

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