INDIA CEMENT MARKET
Concrete is a basic building material that will continue to be in demand far into the future. A world without concrete, and its dominant precursor, Ordinary Portland Cement (OPC), is hard to imagine. Although there are different types of concrete that have been developed for use in different applications, their common virtues are familiarity, versatility, strength, durability, wide availability, fire resistance, resistance to the elements and comparatively low cost.
It is a global commodity, manufactured at thousands of plants. The industry is consolidating globally, but large international firms account for only 30% of the worldwide market. Cement accounts for 83% of total energy use in the production of non-metallic minerals and 94% of CO2 emissions. Energy represents 20% to 40% of the total cost of cement production.
The production of cement clinker from limestone and chalk by heating limestone to temperatures above 950°C is the main energy consuming process. Portland cement, the most widely used cement type, contains 95% cement clinker. Large amounts of electricity are used grinding the raw materials and finished cement.
As a result, cement manufacturing is the third largest cause of man-made CO2 emissions due to the production of lime, the key ingredient in cement. Therefore, energy savings during cement production could lead to lower environmental impact.
The largest opportunities for improving energy efficiency and reducing CO2 emissions can be achieved by improving the cement manufacturing process.
In the cement pyro processing process , it is important to keep in mind that waste materials combust and burn at different temperatures under different conditions. Therefore, solid waste fuels need to be introduced into the kiln in such a manner that they do not significantly change the temperature profile and chemical reactions in the overall pyro processing.
Dry, semi-dry, semi-wet and wet processes are the four main process routes that are used for the production of cement. Dry processes are considerably more energy efficient, but the choice of technology mainly depends on the state of raw materials.
Thanks to the availability of dry materials a great share of production in the developed world is today converted to dry processes. Dry processes are also the choice for new plants or for those looking for expansions or upgrades.
The cement industry faces a number of challenges that include depleting fossil fuel reserves, scarcity of raw materials, perpetually increasing demand for cements and concrete, growing environmental concerns linked to climate change and an ailing world economy. Despite the incremental improvements in process efficiency that have been adopted by the cement industry in recent years, OPC production is still responsible for around 6% of all man-made global carbon emissions.
INDIA CEMENT MARKET DYNAMICS
Post pandemic induced lockdown(June 2020 onwards) the cement industry experienced a boom on account of the overall growth of the Indian economy primarily because of increased industrial activity, flourishing real estate business, growing construction activity, and expanding investment in the infrastructure sector. Traditionally, cement has been a heavily taxed sector with both the central and the state governments levying the taxes which amount to around 30 percent of the selling price of cement or around 70 per cent of the ex-factory price.
OPC is a vital construction material and also a strategic commodity. Such is our dependence on OPC that the world currently produces nearly 3.6 billion metric tonnes of the material each, with volume predicted to rise to more than 5 billion metric tonnes by 2030.
Although figures vary from country to country, around half of the world’s OPC is used to make around 11 billion metric tonnes of concrete annually; the rest is used in mortars, screeds, stucco, coatings, soil stabilization and other applications. Today, the OPC market is dominated by China, which is attributed to 57.3% of global consumption.
The cement industry, like the rest of the construction industry, is facing unprecedented challenges relating to energy resources, CO2 emissions and the use of alternative materials. Worldwide, the cost of energy is rising inexorably as fuel sources deplete. This has clear, traceable impacts on the cost of producing cement and its market price; Green taxes are an additional cost that is incurred if emissions are not restricted, potentially leading to a doubling in the price of cement by 2030.
Carbon-reducing cements, if they could be developed for commercial-scale application, probably offer the safest, most economical, and elegant Carbon Capture and Storage (CCS) technology. The production of cement varies greatly from nation to nation with the availability of materials. Where production does not satisfy demand a country can import to meet its needs.
By 2050 the emissions will have increased by almost 5 times the value in 1990. This is not a good path to be on when the world is becoming more green-aware. The sustainability initiatives will thus not only help pave the way for a ‘greener’ cement industry but will also be beneficial in reducing greenhouse gas taxes and ensuring the continuation of the industry in an economic climate of ever-increasing costs.
INDIA CEMENT MARKET SEGMENTATION
The Indian Market of Cement can be segmented into following categories for further analysis.
By Product Application
- Commercial Construction
- Military Construction
- Heavy engineering Construction
- Light Engineering Constructions
- Residential Constructions
- Non-Residential / Factory Constructions
- Energy based Construction
By Integration Type
- Portland Cement
- PPC Cement
- High Strength Cement
- Marine Technology Cement
- Blended Cement
- Fly Ash Cement
- Slag Based Cement
- Silica based Cement
- High Alumina Cement
By Mixture Type
- Blended Cement
- By Product Cement
- By product and Original Mixture based cement
- Slag Based Cement
- Ash Based cement
By Regional Classification
- Western Region – India
- Eastern Region – India
- Southern Region – India
- Northern Region – India
RECENT MARKET TECHNOLOGICAL TRENDS IN CEMENT COMPOSITION / PRODUCTION
The Indian cement industry has undergone vital changes through technological upgradation and assimilation of latest technology in the pursuit of cost efficiency and the drive for consolidation. Modernizations at the plants and the improvement of plant processes have also helped to reduce manpower requirements.
India is producing different varieties of cement, based on different compositions according to specific end uses, like Ordinary Portland Cement (OPC), Portland Pozzolana Cement (PPC), Portland Blast Furnace Slag Cement (PBFS), Oil Well Cement, Rapid Hardening Portland Cement, Sulphate Resisting Portland Cement and White Cement etc. The basic difference lies in the percentage of clinkers used. These different varieties of cement are produced strictly under BIS specifications and the quality is comparable with the best in the world.
Manufacturing processes in cement production have been and continue to be optimized and automated, using the best technologies available to reduce cost, emissions and increase productivity. This has led to incremental reductions in GreenHouse Gas (GHG) emissions and has also reduced the industry’s employment levels.
Novel cements involve development of cement manufacturing processes that use different raw materials. The shared aim of novel cement developers is cement that emits less CO2 and requires less energy to produce without reducing or compromising the efficiency of the cement.
Wastes can also alter the cement composition. For example, when tyres are co-incinerating the zinc oxide content of clinkers increases significantly. The burning of alternative fuels thus introduces different components into the kiln via ash. These can affect the performance characteristics of the cement, such as lower early strength and longer setting times.
The Indian cement industry has already achieved a significant reduction in total CO2 emissions to an industrial average of 0.72 t CO2/t cement from a substantially higher level of 1.12 t CO2/t cement in 1996. CO2 emissions are targeted to be further reduced to 0.58 t CO2/t of cement by 2050.
At the same time R&D efforts are directed towards developing and adopting methods for designing buildings and concrete structures for a specified service life, use of C&D wastes in construction and replacement of natural sand by bottom ash.
Ultratech cement has recently started focusing upon Supplementary cementitious materials (SCMs) can be used either as fillers or for their pozzolanic properties. The main industrial SCMs are blast furnace slag, fly ash, and, to a lesser scale, silica fume.
This was aimed to bring down the direct usage of resources and have better implementation of waste production reuse within the industrial segment. This gave rise to new cement compositions with much higher strengths and requirements.
Ambuja Cements has also been involved in provisioning special cement technologies for the purpose of high strength railway sleepers under the product brand of Ambuja Railcam which is a high Blaine Portland cement. Alongside this, it has also innovatively brought upon the low carbon footprint based high strength cement of Compchem which has the lowest carbon footprint within the country.