Limestone Calcined Clay Cement

Limestone Calcined Clay Cement (LC3) is a low-carbon cement[1][2][3][4] developed by the École Polytechnique Fédérale de Lausanne (EPFL), Technology and Action for Rural Advancement (TARA), Indian Institute of Technology (IIT) Delhi, IIT-Bombay, IIT-Madras, and the Central University of Las Villas (Cuba).[5][6][7] The cement can reduce carbon dioxide emissions (CO2) related to manufacturing by 30% as compared to ordinary Portland cement.[8][9][10][11] In 2014, the LC3 project received 4 million CHF in Research and Development funding from the Swiss Agency for Development and Cooperation (SDC).[12][13][14][15]

History

Limestone Calcined Clay Cement (LC3) stems from research by the EPFL. It is the result of an ongoing cooperation between EPFL and partners in India and Cuba on developing low carbon and resource efficient raw materials for cement manufacturing.[16][17][18][7] In 2014, the Swiss Agency for Development and Cooperation provided 4 million CHF in funding for the research and development of LC3.[19][20] Testing and standardisation[7] was carried out by the EPFL, IIT-Delhi, IIT-Bombay, IIT-Madras, and the Central University of Las Villas (Cuba).[21] Part of the research focused on specific thematic areas of cement research including hydrate assemblages, pore structure, rheology, reactivity (chemistry), durability and mechanical properties, production, environmental sustainability, and cost effectiveness.[22][9][23]

Composition

The main components of LC3 cements are clinker, calcined clay, limestone, and gypsum.[24][25][26] The fresh concrete production involves synergetic hydration.[10][27] Adding large amounts of calcined clay (metakaolin) and ground limestone to the dry cement powder,[28][29] when adding water to the mix for making concrete, cement and additives start to hydrate and the soluble aluminates released in water from the calcined clay react with the calcium carbonate from the finely crushed limestone.[30][31] The reactive alumina present in metakaolin reacts with the ground limestone, leading to a less porous structure than in other concretes and providing equal strength as with higher levels of clinker substitution.[32][13][2]

Environmental impact

Limestone Calcined Clay Cement is a low-carbon alternative to the standard Portland cement.[33][15] LC3 can reduce CO2 emissions related to cement manufacturing by reducing the amount of clinker, replacing it with finely ground limestone and calcined clays.[34][35] Low-grade kaolin clays can be used for the production of LC3 and are abundantly available in many parts of the world.[36][37]

See also

References

  1. ^ "Green Cement To Help Reduce Carbon Emissions". Forbes.
  2. ^ a b "Indo-Swiss proj in low-carbon cement to get boost". Orange News. Archived from the original on 2016-06-16. Retrieved 2016-05-20.
  3. ^ "Green Cement Reduces Carbon Footprint by 40%". Sourceable. Archived from the original on 2019-08-15. Retrieved 2016-05-20.
  4. ^ "Green Cement". Precast.
  5. ^ Sabnis, Gajanan M. (2015). Green Building with Concrete: Sustainable Design and Construction, Second Edition. CRC Press. p. 57. ISBN 978-1498704113.
  6. ^ "EPFL plans new building material for US$1 trillion development plan". AGG Business.
  7. ^ a b c "Making cement less energy intensive". The Hindu.
  8. ^ "Researchers Test Low-Carbon Cement". Environmental Leader.
  9. ^ a b "Green Cement Reduces Carbon Footprint by 40%". Sourceable. Archived from the original on 2019-08-15. Retrieved 2016-05-20.
  10. ^ a b "Cement which reduces CO2 emission developed". Z News.
  11. ^ "IITs Team up to Develop Eco-friendly Cement". The New Indian Express. Archived from the original on March 7, 2016.
  12. ^ "A new, greener cement to meet future demand". News Mediacom.
  13. ^ a b "Indo-Swiss project in low-carbon cement to get boost in India". Economic Times.[dead link‍]
  14. ^ "Green cement that reduce carbon footprint by 40%". Green Tech Lead.
  15. ^ a b "L'EPFL développe un ciment écologique". Tribune de Geneve.
  16. ^ "Indo-Swiss project in low-carbon cement to get boost in India". ET Realty.
  17. ^ "Limestone Calcined Clay Cement (LC3) to cut CO2 emissions by up to 30%". New Materials International.
  18. ^ "New Cement Blend to cut CO2 Emissions by up to 30%". Construction news. Archived from the original on 2018-03-11. Retrieved 2016-05-20.
  19. ^ "EPFL's cement discovery". Le News.
  20. ^ "Three IITs develop cement low on carbon content". Times of India.
  21. ^ "India, Switzerland join hands to reduce energy consumption". Times of India.
  22. ^ "International Conference on Calcined Clays for Sustainable Concrete". Global Events. Archived from the original on 2018-03-11. Retrieved 2016-05-20.
  23. ^ "India and Switzerland as Innovation Partners". SwissNex.
  24. ^ "LC3". eConstruction. Archived from the original on 2017-02-02. Retrieved 2016-05-20.
  25. ^ "Ecologie: un ciment moins polluant développé en Suisse". Bluewin. Archived from the original on 2017-02-02. Retrieved 2016-05-20.
  26. ^ "Limestone Calcined Clay Cement (LC3) to cut CO2 emissions by up to 30%". New Materials.
  27. ^ "Un nouveau ciment écologique pour répondre aux besoins futurs". Enerzine.
  28. ^ "Green Cement To Help Reduce Carbon Emissions". Forbes.
  29. ^ "Clay and Limestone Cement Could Cut Carbon Emissions". Landscape Online. Archived from the original on 2016-06-24.
  30. ^ "April 2016 Edition" (PDF). World Cement. Archived from the original (PDF) on 2016-06-11. Retrieved 2016-05-20.
  31. ^ "Kuba produziert Öko-Zement für den Weltmarkt". Amerika21.
  32. ^ "Effect of fineness in clinker-calcined clays-limestone cements". Research Gate.
  33. ^ "Öko-Zement erzeugt 40 Prozent weniger Klimagase". Schweizerbauer. Archived from the original on 2014-08-23. Retrieved 2016-05-20.
  34. ^ "Advancements In Stronger, Greener Concrete". The Concrete Producer.
  35. ^ "¿Qué es el cemento ecológico?". El Destape.
  36. ^ "IITs working on new cement blend to cut down carbon footprint". Times of India.
  37. ^ "Switzerland to help India cut down greenhouse emissions". Economic Times.