Journal of Central South University of Technology

, Volume 16, Issue 6, pp 906–913 | Cite as

Preparation and microstructure characterization of poly-sialate-disiloxo type of geopolymeric cement

  • Yun-sheng Zhang (张云升)Email author
  • Wei Sun (孙 伟)
  • Zong-jin Li (李宗津)


In order to investigate the influence of three key molar ratios (n(SiO2)/n(Al2O3), n(K2O)/n(Al2O3) and n(H2O)/n(K2O)), a total of nine potassium poly-sialate-disiloxo (K-PSDS) geopolymeric cement matrices were designed according to orthogonal design principle. Subsequently, XRD, ESEM-EDXA and MAS-NMR techniques were employed to further characterize the microstructure of the most fully reacted geopolymeric cement matrix. The experimental results show that n(K2O)/n(Al2O3) has the most significant effect on compressive strength amongst the three ratios. The highest compressive strength (20.1 MPa) can be achieved when n(SiO2)/n(Al2O3)=6.5, n(K2O)/n(Al2O3)=0.8 and n(H2O)/n(K2O)=10.0. The FTIR spectra of nine PSDS geopolymeric cement matrices also indicate that geopolymeric cement matrix with the highest strength is the most fully reacted one and possesses the largest amount of geopolymeric cement products. The microscopic analysis reveals that PSDS geopolymeric cement matrix possesses structural characteristics similar to gel substances in having a wide range of Si endowments, but predominantly the framework molecular chains of Si partially replaced by 4-coordinated Al tetrahedral.

Key words

geopolymeric cement poly-sialate-disiloxo preparation microstructure 


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  1. [1]
    Davidovits J. Geopolymers and geopolymeric new materials[J]. Journal of Thermal Analysis, 1989, 35(2): 429–441.CrossRefGoogle Scholar
  2. [2]
    Davidovits J. Geopolymer chemistry and properties[C]// Proceedings of the First European Conference on Soft Mineralog. Compiegne: The Geopolymer Institute, 1988: 25–48.Google Scholar
  3. [3]
    Duxson P, Fenandez J A, Provis J L, Lukey G C, Palomo A, van Deventer J S J. Geopolymer technology: The current state of the art[J]. Journal of Materials Science: Special Section, 2007, 42(9): 2917–2933.CrossRefGoogle Scholar
  4. [4]
    Rangan V. Advances in geopolymer concrete[J]. Engineers Australia, 2003, 75(1): 7–10.Google Scholar
  5. [5]
    Davidovits J, Douglas C C, John H P, Douglas J R. Geopolymeric concretes for environmental protection[J]. Concrete International: Design & Construction, 1990, 12(7): 30–40.Google Scholar
  6. [6]
    Duxson P, Provis J L, Lukey G C, van Deventer J S J. The role of inorganic polymer technology in the development of green concrete[J]. Cement and Concrete Research, 2007, 37(12): 1590–1597.CrossRefGoogle Scholar
  7. [7]
    Nowak R. Geopolymer concrete opens to reduce CO2 emissions[J]. The New Scientist, 2008, 197(2640): 28–29.CrossRefGoogle Scholar
  8. [8]
    Zhang Yu-sheng, Sun Wei. Fly ash based geopolymer concrete[J]. Indian Concrete Journal, 2006, 80(1): 20–24.Google Scholar
  9. [9]
    Hongling W, Haihong L, Fengyuan Y. Synthesis and mechanical properties of metakaolinite-based geopolymer[J]. Colloid Surface A, 2005, 268(1/3): 1–6.Google Scholar
  10. [10]
    Sofi M, van Deventer J S J, Mendis P A, Lukey G C. Engineering properties of inorganic polymer concretes (IPCs)[J]. Cement and Concrete Research, 2007, 37(2): 251–257.CrossRefGoogle Scholar
  11. [11]
    Daeik K, Lai H T, Chilingar G, Ten F Y. Geopolymer formation and its unique properties[J]. Environmental Geology, 2006, 51(1): 103–111.CrossRefGoogle Scholar
  12. [12]
    van Jaarsveld J G S, van Deventer J S J. The potential use of geopolymeric materials to immobilize toxic metals: Part I. Theory and applications[J]. Mineral Engineering, 1997, 10(7): 659–669.CrossRefGoogle Scholar
  13. [13]
    Bakharev T. Resistance of geopolymer materials to acid attack[J]. Cement and Concrete Research, 2005, 35(4): 658–670.CrossRefGoogle Scholar
  14. [14]
    Lyon R E, Foden A, Balaguru P N, Foden A J, Sorathia U, Davidovits J. Fire-resistant aluminosilicate composites[J]. Journal of Fire and Materials, 1997, 21(2): 67–73.CrossRefGoogle Scholar
  15. [15]
    Bakharev T. Durability of geopolymer materials in sodium and magnesium sulfate solutions[J]. Cement and Concrete Research, 2005, 35(6): 1233–1246.CrossRefGoogle Scholar
  16. [16]
    Davidovits J. High alkali cements for 21st century concretes[C]// Concrete Technology, Past, Present, and Future. Detroit: American Concrete Institute, 1994: 383–397.Google Scholar
  17. [17]
    Zuhua Z, Mao Y, Huajun Z, Yue C. Role of water in the synthesis of calcined kaolin-based geopolymer[J]. Applied Clay Science, 2009, 43(2): 218–223.CrossRefGoogle Scholar
  18. [18]
    Duxson P, Provis J L. Designing precursors for geopolymer cements[J]. Journal of the American Society, 2009, 91(12): 3864–3869.Google Scholar
  19. [19]
    Zhang Y S, Sun W. Study on polycondensation process of metakaolin based geopolymeric cement using semi-empirical AM1 calculations[J]. Advances in Cement Research, 2008, 21(2): 67–73.Google Scholar
  20. [20]
    Zhang Y S, Sun W, Li Z J. Geopolymer extruded composites with incorporated fly ash and polyvinyl alcohol short fiber[J]. ACI Materials Journal, 2009, 106(1): 3–10.Google Scholar
  21. [21]
    de Silva P, Sagoe-Crenstil K. Medium-term phase stability of Na2O-Al2O3-SiO2-H2O geopolymer systems[J]. Cement and Concrete Research, 2008, 38(6): 870–876.CrossRefGoogle Scholar
  22. [22]
    Dombrowski K, Weil M, Buchwald A. Geopolymer binders[J]. ZKG International, 2008, 61(3): 70–80.Google Scholar
  23. [23]
    Kriven W, Bell J L, Gordon M. Microstructure and microchemistry of fully-reacted geopolymers and geopolymer matrix composites[J]. Ceramic Transactions, 2004, 153: 227–250.Google Scholar
  24. [24]
    Schmucker M. Microstructure of sodium polysialate siloxo geopolymer[J]. Ceramics International, 2005, 31(3): 433–437.CrossRefGoogle Scholar
  25. [25]
    Davidovits J. Chemistry of geopolymeric systems terminology[C]//Proceedings of Geopolymere’ 99 Institute Geopolymer. Saint-Quentin, 1999: 9–44.Google Scholar
  26. [26]
    Valeria F F B, Keneneth J D M, Clelio T. Synthesis and characterization of materials based on inorganic polymers of alumina and silica: Sodium polysialate polymers[J]. International Journal of Inorganic Materials, 2000, 2(4): 309–317.CrossRefGoogle Scholar
  27. [27]
    Akolekar D, Chaffee A, Russell F H. The transformation of kaolin to low-silica X zeolite[J]. Zeolites, 1997, 19(5): 356–365.Google Scholar
  28. [28]
    van Jaarsveld J G S, van Deventer J S J, Schwartzman A. The potential use of geopolymeric materials to immobilize toxic metals: Part II. Material and Leaching Characteristics[J]. Minerals Engineering, 1999, 12(1): 75–91.CrossRefGoogle Scholar
  29. [29]
    Engelhardt G, Fahlke B, Mngi M, Lippmaa E. High resolution 29Si NMR of dealuminated Y-zeolites. 2. Silicon, aluminium ordering in the tetrahedral zeolite lattice[J]. Zeolites, 1983, 3(3): 239–243.CrossRefGoogle Scholar
  30. [30]
    Wang Pu, Pan Zhao-lu, Weng Ling-bao. Mineralogy[M]. Beijing: China Geological Press, 1984. (in Chinese)Google Scholar
  31. [31]
    Duxson P, Provis J L, Lukey G C, Separovic F, van Deventer J S J. 29Si NMR study of structural ordering in aluminosilicate geopolymer gels[J]. Langmuir, 2005, 21(7): 3028–3036.CrossRefGoogle Scholar
  32. [32]
    Davidovits J. Geopolymers: Man-made rock geosynthesis and resulting development of very early high strength cement[J]. J Materials Education, 1994, 16(2/3): 91–139.Google Scholar
  33. [33]
    Engelhardt G, Michel D. High-resolution solid-state NMR of silicates and zeolites[M]. New York: Wiley, 1987.Google Scholar

Copyright information

© Central South University Press and Springer Berlin Heidelberg 2009

Authors and Affiliations

  • Yun-sheng Zhang (张云升)
    • 1
    Email author
  • Wei Sun (孙 伟)
    • 1
  • Zong-jin Li (李宗津)
    • 2
  1. 1.Jiangsu Key laboratory for Construction MaterialsSoutheast UniversityNanjingChina
  2. 2.Department of Civil EngineeringThe Hong Kong University of Science and TechnologyKowloonChina

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