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Characterization of fly ash-pastes synthesized at different activator conditions

  • Energy and Environmental Engineering
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Abstract

Compressive strength and mineralogical and microstructural characterization of the pastes prepared from alkali-activation of low calcium fly ash were investigated. XRD and FTIR were used to observe the mineralogical characterization; SEM, MIP, and NMR were used to observe the microstructural characterization of the pastes. The higher strength of paste was attributed to a more compact and continuous gelatinous matrix due to restructuring of reaction product. The lower values of both porosity (31.0%) and mean pore diameter (9.7 nm) of fly ash-pastes alkali-activated at 85 °C for 24 hr indicate higher reactivity of these pastes compared with other pastes, and result in the higher compressive strength.

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Authors and Affiliations

  1. Division of Civil and Environmental Engineering, Sunchon National University, Sunchon, 540-742, Korea

    Sang-Sook Park & Hwa-Young Kang

  2. Department of Civil and Environment, Hanyeong Technical College, Yeosu, 550-704, Korea

    Hwa-Young Kang

Authors
  1. Sang-Sook Park
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  2. Hwa-Young Kang
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Correspondence to Hwa-Young Kang.

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Park, SS., Kang, HY. Characterization of fly ash-pastes synthesized at different activator conditions. Korean J. Chem. Eng. 25, 78–83 (2008). https://doi.org/10.1007/s11814-008-0013-6

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  • DOI: https://doi.org/10.1007/s11814-008-0013-6

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