Journal of the Chinese Ceramic Society, Volume. 51, Issue 11, 2924(2023)

Decalcification Behavior of Calcium Silicate Hydrate with Different Ca/Si Ratios

ZHANG Ziwei, LIU Zhentao, and LI Guoxin
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    This paper was to synthesize C-S-H with different Ca/Si ratios by a hydrothermal synthesis method, and decalcify it using 6 mol/L NH4Cl solutions. The chemical composition, chain structure and microstructure were analyzed. The results show that C-S-H is a gel structure formed by irregular aggregates. The content of dimer and chain end groups in C-S-H increases, while the average degree of polymerization and average chain length decreases with the increase of Ca/Si ratio. The change of C-S-H structure includes decreased interlayer distance, cross-linked silicate chains, and amorphous silica gels formed after decalcification, resulting in the loss of C-S-H cohesion.

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    ZHANG Ziwei, LIU Zhentao, LI Guoxin. Decalcification Behavior of Calcium Silicate Hydrate with Different Ca/Si Ratios[J]. Journal of the Chinese Ceramic Society, 2023, 51(11): 2924

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    Paper Information

    Received: May. 11, 2023

    Accepted: --

    Published Online: Jan. 18, 2024

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    DOI:

    CSTR:32186.14.

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