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Radioactive Element Distribution Characteristics of Red Mud based Field Road Cement before and after Hydration

  • Cementitious Materials
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Abstract

Red mud was firstly used as a raw material in sintering field road cement. Then, the radioactive element distribution characteristics of red mud based field road cement (RFC) before and after hydration were comparatively investigated. The experimental results indicated that the specific activity of 226Ra and 232Th increased after sintering process from raw material to clinker, as a result of concentrating effect on 226Ra and 232Th during sintering process, but the specific activity of 40K decreased after sintering process as a result of volatilization effect. Radionuclide 226Ra mainly distributed in RFC silicate phases (C x S), 232Th distributed more in RFC interstitial phases than RFC silicate phases (C x S), 40K mainly distributed in RFC interstitial phases. With increasing hydration ages of RFC pastes, the specific activity of 226Ra kept increasing, 232Th remained consistency all the same and 40K declined. The radioactivity of RFC was in the recommended safe limit of Chinese National Standards GB6566-2010 during its preparation and application process.

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Authors and Affiliations

  1. School of Civil Engineering and Communication, North China University of Water Resources and Electric Power, Zhengzhou, 450001, China

    Xiao Wang  (王晓) & Juntao Ma

  2. College of Materials Science and Engineering, Zhengzhou University, Zhengzhou, 450001, China

    Jiujun Yang  (杨久俊)

  3. College of Materials Science and Engineering, Tianjinchengjian University, Tianjin, 300384, China

    Lei Zhang & Jiujun Yang  (杨久俊)

Authors
  1. Xiao Wang  (王晓)
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  2. Juntao Ma
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  3. Lei Zhang
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  4. Jiujun Yang  (杨久俊)
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Corresponding author

Correspondence to Jiujun Yang  (杨久俊).

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Funded by the National Natural Science Foundation of China (No. 51172155)

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Wang, X., Ma, J., Zhang, L. et al. Radioactive Element Distribution Characteristics of Red Mud based Field Road Cement before and after Hydration. J. Wuhan Univ. Technol.-Mat. Sci. Edit. 33, 452–458 (2018). https://doi.org/10.1007/s11595-018-1844-5

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  • DOI: https://doi.org/10.1007/s11595-018-1844-5

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