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Distribution of Na+ and Mechanical Properties of Hardened Body of Alkali-activated Cementitious Materials

  • Cementitious Materials
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Journal of Wuhan University of Technology-Mater. Sci. Ed. Aims and scope Submit manuscript

Abstract

To explore the distribution of and the mechanical properties (compressive strength) of the hardened body of alkali slag-fly ash cementitious materials, this study was conducted by using the XRD, FT-IR, SEM/EDS, and other test methods in three conditions: airtight drying (AD), airtight immersion (AI), and airtight soaking (AS). The 1D distribution law of free of hardened body under standard curing conditions was explored. The experimental results show that under standard curing conditions, the 1D distribution of within 0 d-3 d shows a ∨-shaped distribution, within 3–7 d show a ∧-shaped distribution, and within 7–28 d tends to be balanced. The test results of leaching rate show that the free was the most stable under AD conditions and the hardened body bound the most by XRD, FTIR and SEM/EDS. And the compressive strength of the hardened body was the highest. The compressive strength of 28th reached 95.9 MPa. The definite distribution of provides an important reference for the strength development and durability evaluation of the hardened body of alkali-excited cementitious materials.

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Authors and Affiliations

  1. School of Civil and Traffic Engineering, Beijing University of Civil Engineering and Architecture, Beijing, 102616, China

    Libo Bian  (卞立波) & Zhi Tao

  2. Beijing Key Laboratory of Functional Materials for Building Structure and Environment Remediation, School of Science, Beijing University of Civil Engineering and Architecture, Beijing, 102616, China

    Xiufang Wang  (王秀芳)

  3. Beijing Shoufa Tianren Ecological Landscape Co., Ltd, Beijing, 102699, China

    Shaohui Wang, Kangjun Ye & Xingbo Hu

Authors
  1. Libo Bian  (卞立波)
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  2. Zhi Tao
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  3. Xiufang Wang  (王秀芳)
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  4. Shaohui Wang
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  5. Kangjun Ye
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  6. Xingbo Hu
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Corresponding author

Correspondence to Xiufang Wang  (王秀芳).

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Conflict of interest

All authors declare that there are no competing interests.

Funded by the Natural Sciences Foundation of China (No.51808025), and the Pyramid Talent Training Project of BUCEA (No.JDYC20200329)

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Bian, L., Tao, Z., Wang, X. et al. Distribution of Na+ and Mechanical Properties of Hardened Body of Alkali-activated Cementitious Materials. J. Wuhan Univ. Technol.-Mat. Sci. Edit. 38, 849–856 (2023). https://doi.org/10.1007/s11595-023-2768-3

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  • DOI: https://doi.org/10.1007/s11595-023-2768-3

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