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Understanding silicate hydration from quantitative analyses of hydrating tricalcium silicates

Author

Listed:
  • Elizaveta Pustovgar

    (Institute for Building Materials, Environmental and Geomatic Engineering)

  • Rahul P. Sangodkar

    (University of California)

  • Andrey S. Andreev

    (Soft Matter Science and Engineering Laboratory, UMR CNRS 7615, ESPCI Paris, PSL Research University)

  • Marta Palacios

    (Institute for Building Materials, Environmental and Geomatic Engineering)

  • Bradley F. Chmelka

    (University of California)

  • Robert J. Flatt

    (Institute for Building Materials, Environmental and Geomatic Engineering)

  • Jean-Baptiste d’Espinose de Lacaillerie

    (Institute for Building Materials, Environmental and Geomatic Engineering
    Soft Matter Science and Engineering Laboratory, UMR CNRS 7615, ESPCI Paris, PSL Research University)

Abstract

Silicate hydration is prevalent in natural and technological processes, such as, mineral weathering, glass alteration, zeolite syntheses and cement hydration. Tricalcium silicate (Ca3SiO5), the main constituent of Portland cement, is amongst the most reactive silicates in water. Despite its widespread industrial use, the reaction of Ca3SiO5 with water to form calcium-silicate-hydrates (C-S-H) still hosts many open questions. Here, we show that solid-state nuclear magnetic resonance measurements of 29Si-enriched triclinic Ca3SiO5 enable the quantitative monitoring of the hydration process in terms of transient local molecular composition, extent of silicate hydration and polymerization. This provides insights on the relative influence of surface hydroxylation and hydrate precipitation on the hydration rate. When the rate drops, the amount of hydroxylated Ca3SiO5 decreases, thus demonstrating the partial passivation of the surface during the deceleration stage. Moreover, the relative quantities of monomers, dimers, pentamers and octamers in the C-S-H structure are measured.

Suggested Citation

  • Elizaveta Pustovgar & Rahul P. Sangodkar & Andrey S. Andreev & Marta Palacios & Bradley F. Chmelka & Robert J. Flatt & Jean-Baptiste d’Espinose de Lacaillerie, 2016. "Understanding silicate hydration from quantitative analyses of hydrating tricalcium silicates," Nature Communications, Nature, vol. 7(1), pages 1-9, April.
    • Handle: RePEc:nat:natcom:v:7:y:2016:i:1:d:10.1038_ncomms10952
    DOI: 10.1038/ncomms10952
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    Cited by:

    1. Shiva Shirani & Ana Cuesta & Alejandro Morales-Cantero & Isabel Santacruz & Ana Diaz & Pavel Trtik & Mirko Holler & Alexander Rack & Bratislav Lukic & Emmanuel Brun & Inés R. Salcedo & Miguel A. G. Ar, 2023. "4D nanoimaging of early age cement hydration," Nature Communications, Nature, vol. 14(1), pages 1-13, December.
    2. Xabier M. Aretxabaleta & Jon López-Zorrilla & Iñigo Etxebarria & Hegoi Manzano, 2023. "Multi-step nucleation pathway of C-S-H during cement hydration from atomistic simulations," Nature Communications, Nature, vol. 14(1), pages 1-9, December.
    3. Xinhang Xu & Chongchong Qi & Xabier M. Aretxabaleta & Chundi Ma & Dino Spagnoli & Hegoi Manzano, 2024. "The initial stages of cement hydration at the molecular level," Nature Communications, Nature, vol. 15(1), pages 1-10, December.

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