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Utilization of electric arc furnace dust as an admixture to Portland cement pastes

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Abstract

Electric arc furnace dust (EAFD) is termed as a hazardous waste due to its contamination with heavy metals. Inertization of such very fine dust can be occurred via stabilization and solidification process within the hydrated Portland cement matrix. In this paper, the effect of the addition of various ratios of EAFD on the properties of the hardened Portland cement paste was investigated. Compressive strength, chemically combine water and free lime contents were determined. In addition, phase composition using XRD; DTA analysis; as well as microstructure of the formed hydrates for some selected samples were investigated using SEM. The obtained results showed that the paste containing 1/mass% EAFD give the highest compressive strength values at most hydration ages, specially the later ages, compared to the neat Portland cement blank paste. Whileas, the pastes containing 3 and 5/mass% EAFD showed lower values of compressive strength compared to those of the blank paste.

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Authors and Affiliations

  1. Chemistry Department, Faculty of Science, Ain Shams University, Cairo, Egypt

    Eisa E. Hekal & Salah A. Abo-El-Enein

  2. Chemistry Department, Faculty of Science, Suez Canal University, Ismailia, Egypt

    S. A. El-Korashy

  3. Ezz Flat Steel, Suez, Egypt

    G. M. Megahed & T. M. El-Sayed

Authors
  1. Eisa E. Hekal
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  2. Salah A. Abo-El-Enein
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  3. S. A. El-Korashy
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  4. G. M. Megahed
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  5. T. M. El-Sayed
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Correspondence to Eisa E. Hekal.

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Hekal, E.E., Abo-El-Enein, S.A., El-Korashy, S.A. et al. Utilization of electric arc furnace dust as an admixture to Portland cement pastes. J Therm Anal Calorim 114, 613–619 (2013). https://doi.org/10.1007/s10973-013-2992-8

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  • DOI: https://doi.org/10.1007/s10973-013-2992-8

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