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Synthesis of Fly Ash-GGBS-Blended Geopolymer Composits

Conference paper
Part of the Lecture Notes in Civil Engineering book series (LNCE, volume 16)

Abstract

Fly ash and blast-furnace slag are well-known industrial by-products and are used to manufacture blended cements and concrete. Fly ash has been used as pozzolanic material to improve the physical, mechanical as well as chemical properties of the cements and concrete, whereas blast-furnace slag cements are characterized by their low heat of hydration and high sulphate and sea water resistance. On the other hand, addition of blast-furnace slag to fly ash may have substantial influence on the strength development of geopolymer binder when cured under ambient temperature condition. This paper presents the compressive strength of geopolymer binders synthesized from Class-F fly ash (FA) blended with ground granulated blast-furnace slag (GGBS) by optimizing the influential parameters. The chemical activation of fly ash–slag mixtures with different concentrations of sodium hydroxide (NaOH) for varying solution to solid ratio has been made. The test results showed that the development of compressive strength is directly concomitant to concentration of NaOH solution. Moreover, as the slag content in the mixture increases, the compressive strength increases. Hence, an inorganic polymer can be synthesized from fly ash–slag mixture by activating with appropriate amount of NaOH which can be used as cementitious material.

Keywords

Fly ash GGBS Alkali concentration Solution to solid ratio Compressive strength 

References

  1. Deb, P. S., Nath, P., & Sarker, P. K. (2014). The effects of ground granulated blast-furnace slag blending with fly ash and activator content on the workability and strength properties of geopolymer concrete cured at ambient temperature. Materials and Design, 62, 32–39.CrossRefGoogle Scholar
  2. De Silva, P., Sagoe-Crenstil, K., & Sirivivatnanon, V. (2007). Kinetics of geopolymerization: role of Al2O3 and SiO2. Cement and Concrete Research, 37(4), 512–518.CrossRefGoogle Scholar
  3. Duxson, P., Fernández-Jiménez, A., Provis, J. L., Lukey, G. C., Palomo, A., & Van Deventer, J. S. J. (2007a). Geopolymer technology: the current state of the art. Journal of Materials Science, 42(9), 2917–2933.CrossRefGoogle Scholar
  4. Duxson, P. S. W. M., Mallicoat, S. W., Lukey, G. C., Kriven, W. M., & Van Deventer, J. S. J. (2007b). The effect of alkali and Si/Al ratio on the development of mechanical properties of metakaolin-based geopolymers. Colloids and Surfaces A: Physicochemical and Engineering Aspects, 292(1), 8–20.CrossRefGoogle Scholar
  5. Marjanovic, N., Komljenovic, M., Bascarevic, Z., Nikolic, V., & Petrovic, R. (2015). Physical–mechanical and microstructural properties of alkali-activated fly ash–blast furnace slag blends. Ceramics International, 41(1), 1421–1435.CrossRefGoogle Scholar
  6. Nath, P., & Sarker, P. K. (2014). Effect of GGBFS on setting, workability and early strength properties of fly ash geopolymer concrete cured in ambient condition. Construction and Building Materials, 66, 163–171.CrossRefGoogle Scholar
  7. Puertas, F., Martıinez-Ramıirez, S., Alonso, S., & Vazquez, T. (2000). Alkali-activated fly ash/slag cements: strength behaviour and hydration products. Cement and Concrete Research, 30(10), 1625–1632.CrossRefGoogle Scholar
  8. Rajini, B., & Narasimha Rao, A. V. (2014). Mechanical properties of geopolymer concrete with fly ash and GGBS as source materials. International Journal of Innovative Research in Science Engineering and Technology, 3(9), 15944–15953.CrossRefGoogle Scholar
  9. Wardhono, A., Law, D. W., & Strano, A. (2015). The strength of alkali-activated slag/fly ash mortar blends at ambient temperature. Procedia Engineering, 125, 650–656.CrossRefGoogle Scholar

Copyright information

© Springer Nature Singapore Pte Ltd. 2019

Authors and Affiliations

  • Subhashree Samantasinghar
    • 1
  • Suresh Prasad Singh
    • 1
  1. 1.Department of Civil EngineeringNational Institute of Technology RourkelaRourkelaIndia

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