Development of Room Temperature Curing Geopolymer from Calcined Water-Treatment-Sludge and Rice Husk Ash

  • Anurat PoowancumEmail author
  • Ekkasit Nimwinya
  • Suksun Horpibulsuk
Conference paper
Part of the RILEM Bookseries book series (RILEM, volume 10)


Geopolymer is an environmental friendly material, and is expected to use as the cement replacement materials. Because, the geopolymer production does not emit carbon dioxide gas, and is a low energy consuming process. Moreover, geopolymer can be synthesized from variety kinds of waste materials. The present work, the room temperature curing geopolymer has been developed by using the calcined water-treatment-sludge (WTS) and the rice husk ash (RHA) as the precursors. Mixture of sodium hydroxide solution and sodium silicate solution was used as an alkali activator solution. The results show that the RHA promotes strength of the WTS-geopolymer. By adding RHA 30 wt%, strength of geopolymer is close to the minimum required strength of the ordinary Portland cement (OPC). In addition, density of WTS-RHA geopolymer is 3 times lower than that of the OPC. Knowledge in the present work opens an opportunity to apply geopolymer for using in variety kinds of engineering applications, especially the lightweight construction materials.


Ordinary Portland Cement Sodium Silicate Solution Concrete Geopolymer Initial Setting Time Water Treatment Sludge 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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This research was supported by the Suranaree University of Technology and the Office of Higher Education Commission under NRU project of Thailand. The third author acknowledges the Thailand Research Fund under the TRF Senior Research Scholar program Grant No. RTA5680002.


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Copyright information

© RILEM 2015

Authors and Affiliations

  • Anurat Poowancum
    • 1
    Email author
  • Ekkasit Nimwinya
    • 2
  • Suksun Horpibulsuk
    • 3
  1. 1.School of Ceramic Engineering, Faculty of EngineeringSuranaree University of TechnologyNakhon RatchasimaThailand
  2. 2.School of Agricultural Engineering, Faculty of EngineeringSuranaree University of TechnologyNakhon RatchasimaThailand
  3. 3.School of Civil Engineering, Faculty of EngineeringSuranaree University of TechnologyNakhon RatchasimaThailand

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