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Geopolymer

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Geopolymer concrets main purpose of alternate the OPC concrete is reduction of emission of CO2

Veröffentlicht in: Ingenieurwesen
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Geopolymer

  1. 1. By Sayyed Quamar Ali A.I. Abdul Razzak Kalsekar Polytechnic Panvel
  2. 2. Introduction Process Properties Advantages Applications Hurdles Conclusion
  3. 3. Geopolymer concrete is an alternative of ordinary cement concrete. It is prepared by the geopolymer cement. Geopolymer cement is the different binder other than ordinary cement.
  4. 4. Alkaline solution induce silica & aluminum atoms to dissolve the fly ash. Gel formation started by applying heat. Gel binds the concrete contents to form the geopolymer concrete.
  5. 5. High compressive strength. High tensile strength. Rapid strength gain. Low shrinkage. Sets on room temperature. Chemical resistance. Higher resistance to heat.
  6. 6. Compressive strength: The compressive strength of geopolymer is 1.5 times more than that of ordinary portland cement concrete. Workability of geopolymer concrete is better in comparison to ordinary concrete. The compressive strength of geopolymer concrete increases as increment in % of fly ash.
  7. 7. Reduces CO2 emission. Utilization of byproducts.(Fly ash) Durable. Economically sustainable. Fire proof. Low permeability. Chemical resistance.  High tensile and compression strength.
  8. 8. Precast concrete products like railway sleepers, Parking tiles, geopolymer concrete blocks, etc In marine structures due to chemical attacks. Where the fire resistance material is required. In road construction.
  9. 9. Source of materials: Requires different source materials. Like (Fly ash, Alumina and silica, Alkaline solution, Aggregates.) Difficult to create: Requires use of chemicals, such as sodium hydroxide, that can be harmful. Pre mix only: Sold only as pre mix/ pre cast material due to mixing is dangerous.
  10. 10.  The reduced CO2 emissions of Geopolymer cements make them a good alternative to Ordinary Portland Cement.  Produces a substance that is comparable to or better than traditional cements with respect to most properties.  Geopolymer concrete has excellent properties within both acid and salt environments.
  11. 11. Mehta, P. K. 2002 “Greening of the Concrete Industry for Sustainable Development”, ACI Concrete International, 24(7):pp.23-28 Cembureau “Cement in Cembureau Countries Statistics 2005- 2007” available at http://www.cembureau.be/Documents/KeyFacts/STATISTICS/Cement%20in%20CEMB%20coun tries.pdf Mehta, P. K. 2001 “Reducing the Environmental Impact of Concrete”, ACI Concrete International 23(10):pp. 61-66 Portland Cement Association 2006 “World Cement Consumption Growth Expected to Continue” in Portland Cement Association Executive Report, available at http://www.cement.org/exec/10-23-06.htm . Davidovits, J. 1991 “Geopolymers: inorganic geopolymeric new materials” Journal of Thermal Analysis, 37, pp. 1633-1656. Rangan,B.V. 2008 “Low-Calcium Fly Ash-Based Geopolymer Concrete” Chapter 26, Concrete Construction Engineering Handbook, Second Edition, Editor-in-Chief: E.G. Nawy, CRC Press, New York, pp. 26.1-26.20; also available as Research Report GC4, Curtin University of Technology at http://espace.library.curtin.edu.au/R?func=dbin-jump-full&object_id=20465&local_base=gen01-era02 Sumajouw, M. D. J. and Rangan, B.V. 2006 “Low-Calcium Fly Ash-Based Geopolymer Concrete: Reinforced Beams and Columns” Research Report GC3, Faculty of Engineering, Curtin University of Technology, available at http://espace.library.curtin.edu.au/R/?func=dbin-jump-full&object_id=19466&local_base=GEN01 Ash Development Association of Australia, “Total ash production and beneficial usage” available at http://www.adaa.asn.au/statistics.htm
  12. 12.  Sofi, M., van Deventer, J. S. J., Mendis, P. A. and Lukey, G. C. 2007 “Bond performance of Reinforcing Bars in Inorganic Polymer Concrete (IPC)”, Journal of Materials Science, 42(9), pp. 3107-3116.   Sarker, P. K., Grigg, A. and Chang, E.H. 2007 “Bond Strength of Geopolymer Concrete with Reinforcing Steel” in: Zingoni, A. (ed) Proceedings of Recent Development in Structural Engineering, Mechanics and Computation, The Netherlands, pp. 1315-1320  Hardjito, D. and Rangan, B. V. 2005 “Development and Properties of Low Calcium Fly Ash Based Geopolymer Concrete”, Research Report GC1, Faculty of Engineering, Curtin University of Technology, available at http://espace.library.curtin.edu.au/R?func=dbin-jump- full&object_id=19327&local_base=gen01-era02   Gourley, J.T. and Johnson, G.B. 2005 “Developments in Geopolymer Precast Concrete”, Proceedings of the International Workshop on Geopolymers and Geopolymer Concrete, Perth, Australia.  Siddiqui KS 2007, Strength and durability of low –calcium fly-ash based geopolymer concrete, Final year Honours dissertation, The University of Western Australia, Perth.  Cheema, D.S., Lloyd, N.A., Rangan, B.V. 2009 “Durability of Geopolymer Concrete Box Culverts-A Green Alternative”, Proceedings of the 34th Conference on Our World in Concrete and Structures, Singapore.  Wallah, S. E. and Rangan, B.V. 2006 “Low Calcium Fly Ash Based Geopolymer Concrete: Long Term Properties.” Research Report GC2, Faculty of Engineering, Curtin University of Technology, available at http://espace.library.curtin.edu.au/R/?func=dbin-jump-full&object_id=19464&local_base=GEN01

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