Factors affecting the shrinkage of fly ash geopolymers

Charoenchai Ridtirud, Prinya Chindaprasirt, Kedsarin Pimraksa

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    Charoenchai Ridtirud, Prinya Chindaprasirt, and Kedsarin Pimraksa, Factors affecting the shrinkage of fly ash geopolymers, Int. J. Miner. Metall. Mater., 18(2011), No. 1, pp.100-104. https://dx.doi.org/10.1007/s12613-011-0407-z
    Charoenchai Ridtirud, Prinya Chindaprasirt, and Kedsarin Pimraksa, Factors affecting the shrinkage of fly ash geopolymers, Int. J. Miner. Metall. Mater., 18(2011), No. 1, pp.100-104. https://dx.doi.org/10.1007/s12613-011-0407-z
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    Factors affecting the shrinkage of fly ash geopolymers

    • Sustainable Infrastructure Research and Development Center, Department of Civil Engineering, Faculty of Engineering, Khon Kaen University, Khon Kaen, 40002, Thailand

    • Department of Industrial Chemistry, Faculty of Sciences, Chiang Mai University, Chiang Mai, 50200, Thailand

    基金项目: 

    This work was supported by the Thailand Research Fund through the Royal Golden Jubilee Ph.D. Program (No.PHD/0120/2549).

      通信作者:

      Prinya Chindaprasirt E-mail: prinya@kku.ac.th

    中文摘要

    The shrinkage of fly ash geopolymers was studied in the present study. Fly ash was used as the source material for making the geopolymers. The effects of the concentration of NaOH, sodium silicate-to-NaOH ratio, liquid-to-ash ratio, curing temperature, and curing time on shrinkage were investigated. The geopolymers were cured at 25, 40, and 60℃, respectively. The results indicate that the shrinkage of geopolymers is strongly dependent on curing temperature and liquid-to-ash ratio. The increase in shrinkage is associated with the low strength development of geopolymers. It is also found that NaOH concentration and sodium silicate-to-NaOH ratio also affect the shrinkage of geopolymers but to a lesser extent.

     

    Factors affecting the shrinkage of fly ash geopolymers

    Author Affilications

      • Sustainable Infrastructure Research and Development Center, Department of Civil Engineering, Faculty of Engineering, Khon Kaen University, Khon Kaen, 40002, Thailand

      • Department of Industrial Chemistry, Faculty of Sciences, Chiang Mai University, Chiang Mai, 50200, Thailand

    • Funds: 

      This work was supported by the Thailand Research Fund through the Royal Golden Jubilee Ph.D. Program (No.PHD/0120/2549).

    • Received: 27 October 2009; Revised: 11 December 2009; Accepted: 20 May 2010;
    The shrinkage of fly ash geopolymers was studied in the present study. Fly ash was used as the source material for making the geopolymers. The effects of the concentration of NaOH, sodium silicate-to-NaOH ratio, liquid-to-ash ratio, curing temperature, and curing time on shrinkage were investigated. The geopolymers were cured at 25, 40, and 60℃, respectively. The results indicate that the shrinkage of geopolymers is strongly dependent on curing temperature and liquid-to-ash ratio. The increase in shrinkage is associated with the low strength development of geopolymers. It is also found that NaOH concentration and sodium silicate-to-NaOH ratio also affect the shrinkage of geopolymers but to a lesser extent.

     

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