Advances in nano research

  • 제4권3호
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  • Pages.181-195
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  • 2016
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  • 2287-237X(pISSN)
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  • 2287-2388(eISSN)
테크노프레스 (Techno-Press)
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DOI QR코드

DOI QR Code

Nano-Silica effect on the physicomechanical properties of geopolymer composites

  • Khater, H.M. (Housing and Building National Research Centre (HBNRC))
  • 투고 : 2016.04.10
  • 심사 : 2016.07.04
  • 발행 : 2016.09.25
⟨ 이전 논문 다음 논문 ⟩

초록

Addition of nano-$SiO_2$ (NS) to geopolymer composites has been studied through measurement of compressive strengths, FTIR and XRD analysis. Alumino-silicate materials are coarse aggregate included waste concrete and demolished walls with its cementing binder, cement kiln dust (CKD) used and can possess a pronouncing activation for the geopolymer reaction resulting from the high alkali contents within. Materials prepared at water/binder ratios in a range of 0.30: 0.40 under curing of $40^{\circ}C$ and 100% Relative Humidity (R.H.), while the used activator is sodium hydroxide in the ratio of 2 wt. %. First, CKD is added in the ratio from 10 up to 50 wt., %, and the demolished walls was varied depending on the used CKD content, while using constant ratio of waste concrete (40 wt., %). Second step, depending on the optimum CKD ratio resulted from the first one (40 wt. %), so the control geopolymer mix composed of cement kiln dust, demolished walls and waste concrete in the ratio (40:20:40, wt %). Nano-silica partially replaced waste concrete by 1 up to 8%. Results indicated that, compressive strengths of geopolymer mixes incorporating nano-silica were obviously higher than those control one, especially at early ages and specially with 3%NS.

키워드

참고문헌

  1. Ajimohammadi, A., Provis, J.L. and Van Deventer, J.S. (2009), "One-part geopolymer mixes from geothermal silica and sodium aluminate," Ind. Eng. Chem. Res., 47(23), 9396-405. https://doi.org/10.1021/ie8006825
  2. ASTM C109M-12 (2012), Standard Test Method for Compressive Strength of Hydraulic Cement Mortars.
  3. Baes, C.F. and Mesmer, R.E. (1976), The Hydrolysis of Cations, John Willey & Sons, New York.
  4. Collins, F., Lambert, F. and Duan, W.H. (2012), "The influence of admixtures on the dispersion, workability, and strength of carbon nanotube OPC paste mixtures," Cement Concrete Compos., 34(9), 1067-74 https://doi.org/10.1016/j.cemconcomp.2012.06.007
  5. de Vargas, A.S., Dal Molin, D.C., Masuero, A.B., Vilela, A.C., Castro-Gomes, J. and de Gutierrez, R.M. (2014), "Strength development of alkali-activated fly ash produced with combined NAOH and $CA(OH)_2$ activators," Cement Concrete Compos., 53, 341-349. https://doi.org/10.1016/j.cemconcomp.2014.06.012
  6. Duxson, P., Fernandez-Jimenez, A., Provis, J.L., Lukey, G.C., Palomo, A. and van Deventer, J.S.J. (2007a), "Geopolymer technology: the current state of the art," J. Mater. Sci., 42(9), 2917-33. https://doi.org/10.1007/s10853-006-0637-z
  7. Duxson, P., Mallicoat, S.W., Lukey, G.C., Kriven, W.M. and Van Deventer, J.S.J. (2007b), "The effect of alkali and Si/Al ratio on the development of mechanical properties of metakaolin-based geopolymers," Colloid. Surf, A., 292(1), 8-20. https://doi.org/10.1016/j.colsurfa.2006.05.044
  8. Duxson, P., Provis, J.L., Lukey, G.C. and van Deventer, J.S.J. (2007), "The role of inorganic polymer technology in the development of green concrete," Cement Concrete Compos., 37(12), 1590-97. https://doi.org/10.1016/j.cemconres.2007.08.018
  9. Fernandez-Jimenez, A. and Palomo, A. (2005), "Composition and microstructure of alkali activated fly ash binder: effect of the activator," Cement Concrete Compos., 35, 1984-92. https://doi.org/10.1016/j.cemconres.2005.03.003
  10. Fernandez-Jimenez, A., Palomo, A. and Criado, M. (2006), "Alkali activated fly ash binders. A comparative study between sodium and potassium activators," Mater Constr., 56(281), 51-6.
  11. Garcia-Lodeiro, I., Fernandez-Jimenez, A., Palomo, A. and Macphee, D.E. (2010), "Effect on fresh CS-H gels of the simultaneous addition of alkali and aluminum," Cement Concrete Compos., 40, 27-32. https://doi.org/10.1016/j.cemconres.2009.08.004
  12. Khater, H.M. (2010), "Influence of metakaolin on resistivity of cement mortar to magnesium chloride solution," Ceramics-Silikaty J., 54(4), 325-333.
  13. Khater, H.M. (2012), "Calcium effect on geopolymerization of alumino silicate wastes," J. Mater. Civil Eng., 24(1), 92-101. https://doi.org/10.1061/(ASCE)MT.1943-5533.0000352
  14. Khater, H.M. (2013a), "Effect of cement kiln dust on geopolymer composition and its resistance to sulphate attack," Green Mater. J., 1(Gmat1), 36-46. https://doi.org/10.1680/gmat.12.00003
  15. Khater, H.M. (2013b), "Effect of silica fume on the characterization of the geopolymer materials," Int. J. Adv. Struct. Eng., 5(12), 1-10. https://doi.org/10.1186/2008-6695-5-1
  16. Li, H., Xiao, H.G. and Ou, J.P. (2004), "A study on mechanical and pressure-sensitive properties of cement mortar with Nano phase materials," Cement Concrete Compos., 34, 435-438. https://doi.org/10.1016/j.cemconres.2003.08.025
  17. Li, H., Xiao, H.G., Yuan, J. and Ou, J. (2004), "Microstructure of cement mortar with nano particles," Compos. Part B, 35, 185-189. https://doi.org/10.1016/S1359-8368(03)00052-0
  18. Maile, A. (2006), "The chemistry and physics of nano-cement," Loyola Mary mount University, Advisor: Dr. C.P. Huang Submitted to: NSF-REU University of Delaware.
  19. McCormick, A.V. and Bell, A.T. (1989), "The solution chemistry of zeolite precursors," Catal Rev. Sci. Eng., 31, 97-127. https://doi.org/10.1080/01614948909351349
  20. Mitchell, D.R.G., Hinczak, I. and Day, R.A. (1998), "Interaction of silica fume with calcium hydroxide solutions and hydrated cement pastes," Cement Concrete Compos., 28, 1571-84. https://doi.org/10.1016/S0008-8846(98)00133-1
  21. Panias, D., Giannopoulou, I.P. and Perraki, T. (2007), "Effect of synthesis parameters on the mechanical properties of fly ash-based geopolymers," Coll. Surf. A: Phys. Eng. Aspect., 301, 246-254. https://doi.org/10.1016/j.colsurfa.2006.12.064
  22. Papadakis, V.G. (1999), "Experimental investigation and theoretical modeling of silica fume activity in concrete," Cement Concrete Compos., 29, 79-86. https://doi.org/10.1016/S0008-8846(98)00171-9
  23. Phair, J.W. and van Deventer, J.S.J. (2001), "Effect of silicate activator pH on the leaching and material characteristics of waste-based inorganic polymers," Miner Eng., 14(3), 289-304. https://doi.org/10.1016/S0892-6875(01)00002-4
  24. Provis, J.L. (2009), "Activating solution chemistry for geopolymers," Eds. Provis, J.L. and van Deventer, J.S.J., Geopolymers: Structures, Processing, Properties and Industrial Applications, Wood head Publishing, Abingdon UK.
  25. Richardson, I.G. (2000), "The nature of the hydration products in hardened cement paste," Cement Concrete Compos., 22, 97-113. https://doi.org/10.1016/S0958-9465(99)00036-0
  26. Saikia, N., Usami, A., Kato, S. and Kojima, T. (2004), "Hydration behavior of ecocement in presence of metakaolin," Res. Prog. J., 51(1), 35-41.
  27. Senff, L., Hotza, D., Repette, W.L., Ferreira, V.M. and Labrincha, J.A. (2010), "Effect of nanosilica and microsilica onmicrostructure and hardened properties of cement pastes and mortars," Adv. Appl. Ceramic., 109(2), 104-110 https://doi.org/10.1179/174367509X12502621261659
  28. Taylor, H.F.W. (1993), "Nanostructure of C-S-H: current status," Adv. Cement Bas. Mater., 1, 38-46. https://doi.org/10.1016/1065-7355(93)90006-A
  29. Van Jaarsveld, J.G.S. and van Deventer, J.S.J. (1999), "Effect of the alkali metal activator on the properties of fly ash-based geopolymers," Ind. Eng. Chem. Res., 38(10), 3932-41. https://doi.org/10.1021/ie980804b
  30. Yang, K.H. and Song, J.K. (2009), "Workability loss and compressive strength development of cementless mortars activated by combination of sodium silicate and sodium hydroxide," J. Mater. Civ. Eng., 21, 119-27. https://doi.org/10.1061/(ASCE)0899-1561(2009)21:3(119)
  31. Yang, K.H., Song, J.K., Ashour, A.F. and Lee, E.T. (2008), "Properties of cementless mortars activated by sodium silicate," Constr. Build. Mater., 22(9), 1981-9. https://doi.org/10.1016/j.conbuildmat.2007.07.003
  32. Zhang, X.Z. (2000), "Nanostructure of calcium silicate hydrate gels in cement paste," J. Am. Ceram Soc., 83(10), 2600-4. https://doi.org/10.1111/j.1151-2916.2000.tb01595.x

피인용 문헌

  1. Characterization of Nano-Silica Local Metakaolin Based-Geopolymer: Microstructure and Mechanical Properties vol.10, pp.2, 2016, https://doi.org/10.4236/ojce.2020.102013
  2. Strengthening of cement blended soft clay with nano-silica particles vol.20, pp.6, 2016, https://doi.org/10.12989/gae.2020.20.6.505