Know how blended cement makes a concrete structure durable and fly-ash improves its strength
Cement

Know how blended cement makes a concrete structure durable and fly-ash improves its strength

Blended cement makes sense economically, environmentally and functionally. Greater awareness of these benefits could pave the way for more blending.

ACC is India's first cement company to be awarded the GreenPro certification by the Confederation of Indian Industries for...

Blended cement makes sense economically, environmentally and functionally. Greater awareness of these benefits could pave the way for more blending. <p></p> <p>ACC is India's first cement company to be awarded the GreenPro certification by the Confederation of Indian Industries for all its eco-friendly, blended cement products.</p> <p>Blending implies adding industrial waste products such as fly-ash and silica fume to cement. While growing awareness of the need for sustainable construction, stringent environment regulations and cost compulsions were the earlier drivers of blended cement, now, users should be driven by the possibility of achieving better construction outcomes through blended cement.</p> <p>&quot;Possibly the biggest misconception about fly-ash is that it is a waste material rather than a value-added material,&quot; says <span style="font-weight: bold;">N Kalidas, Director, Institute for Solid Waste Research &amp; Ecological Balance (INSWAREB). </span>&quot;Studies on the chemistry of fly-ash-cement reactions show that adding 50 per cent of fly-ash to the cement mix can achieve similar compressive strength as that of pure Ordinary Portland Cement (OPC) by the 28th day and a higher strength beyond day 56. By using admixtures and controlling the water/cement material ratio, fly-ash blended concrete surpasses the strengths of OPC-concrete from the third day onwards.&quot;</p> <p>&quot;Blended cement enhances the durability of the concrete structure through the reaction of pozzolanic material with free lime generated during hydration, enhancing the impermeability of the cement paste,&quot; explains <span style="font-weight: bold;">Anil Kumar Pillai, Senior Deputy General Manager, Technical Services, The Ramco Cements.</span> </p> <p>Fly-ash is a value-add cementitious material. Essentially, it is a material that triggers secondary mineralogy, which improves the durability and strength of concrete, explains Kalidas, who believes it is possible to achieve concrete strength of 50 MPa by supplementing 20-30 per cent of cement with fly-ash. In self-compacting concrete, similar strengths can be achieved even by supplementing 70 per cent of the cement with selective fly-ash.</p> <p>For these reasons, the &quot;Bureau of Indian Standards (BIS) recommends blended cement for concrete structures in coastal areas or those that will be subject to chemical or chloride and sulphate attack,&quot; observes Pillai.</p> <p><span style="font-weight: bold;">- CHARU BAHRI</span></p> <p><span style="font-weight: bold; font-style: italic;">To share your views on the market for Cement and Concrete in India, write in at feedback@ConstructionWorld.in</span></p> <p></p> Related Links Sustainable infrastructure, Housing for All to drive demand for cement and concrete OPC cement, fly-ash and GGBS adding to strength and quality of concrete in world’s leading projects Here’s what Dalmia, ACC and Ramco Cements are innovating for blended cement Innovations that lower cement consumption and provide greener concrete structures Why does it make sense to replace some cement in construction?

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Building Material

Ambuja and ACC's blended cement are now enlisted in GRIHA catalogue

Ambuja Cements and ACC, the cement building and material companies of the diversified Adani Group, have achieved certification for their sustainable blended cement products and are now enlisted in GRIHA's Product Catalogue. This underscores their leading role in green cement production and commitment to achieving Net Zero emissions by 2050.

GRIHA Council (registered under the Societies Registration Act, 1860) is an independent society developed for the promotion and adoption of sustainable habitats in the Indian subcontinent. It was established in the year 2007 with the combined effort..

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Building Material

Cement companies' green power mix likely to rise to 42 pc

Cement companies are poised to significantly increase their utilization of green power sources, with expectations of a rise to 40-42% by FY25, up from the current 35% in FY23. This transition towards greener energy solutions is projected to result in substantial cost savings of 140-160 basis points through reduced energy expenditures, as stated in a report released on Monday.

Leading cement manufacturers are committed to reducing their emissions by 15-17% over the next 8-10 years. They aim to achieve this by increasing the proportion of blended cement, which utilizes less clinker an..

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Infrastructure Transport

Dalmia Bharat's blended cement finds way in major highway projects

Dalmia Bharat Ltd., a leading cement manufacturer in India, has gained significant traction in major infrastructure projects by offering its innovative blended cement solutions. The company's cement blends, Dalmia INFRAPRO and Dalmia INFRAGREEN, have found applications in key initiatives such as the Bharatmala scheme, East-West Highway corridors, and the notable Golden Triangle quadrilateral project, which connects Delhi, Kolkata, Mumbai, and Chennai.

Blended cements are formulated by combining two or more elements, including cementitious ingredients like Portland cement, fly a..

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Building Material

Shree Cement incurs Rs 6.62 billion profit for Q4; beats expectations

Shree Cement, India's third-largest cement manufacturer by market capitalisation announced a fourth-quarter profit that exceeded, attributing it to increased volumes driven by lower cement prices. Typically, cement companies witness a surge in volumes in the March quarter as they reduce prices to clear year-end inventory backlogs.

Analysts had anticipated that reduced fuel costs would partially offset the decline in prices. Shree Cement's profit for the quarter ending March 31 reached Rs 6.62 billion, surpassing street forecasts of Rs 6.20 billion, as per LSEG data. This marked a si..

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Building Material

Jaishankar Highlights Mumbai-Ahmedabad Bullet Train Benefits

india's vision of a modern and interconnected transportation network. Foreign Minister S Jaishankar has emphasised the significant benefits of the Mumbai-Ahmedabad bullet train project, citing its potential to revolutionise transportation and boost economic growth. Speaking on the project, Jaishankar highlighted its role in enhancing connectivity, fostering economic development, and strengthening bilateral ties with Japan.

The Mumbai-Ahmedabad bullet train project, a flagship infrastructure initiative between India and Japan, aims to reduce travel time between the two cities from hour..

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