Textural and mechanical characterization of C-S-H gels from hydration of synthetic T1-C3S, β-C2S and their blends

Authors

  • S. Goñi Instituto de Ciencias de la Construcción Eduardo Torroja (IETcc-CSIC) - Materiales de Construcción Nanoestructurados y Ecoeficientes. Unidad Asociada LABEIN-Tecnalia/CSIC.IETcc
  • A. Guerrero Instituto de Ciencias de la Construcción Eduardo Torroja (IETcc-CSIC) - Materiales de Construcción Nanoestructurados y Ecoeficientes. Unidad Asociada LABEIN-Tecnalia/CSIC.IETcc
  • F. Puertas Instituto de Ciencias de la Construcción Eduardo Torroja (IETcc-CSIC) - Materiales de Construcción Nanoestructurados y Ecoeficientes. Unidad Asociada LABEIN-Tecnalia/CSIC.IETcc
  • M. S. Hernández Instituto de Ciencias de la Construcción Eduardo Torroja (IETcc-CSIC)
  • M. Palacios Institute for Building Materials, ETH Zurich
  • J. S. Dolado Materiales de Construcción Nanoestructurados y Ecoeficientes. Unidad Asociada LABEIN-Tecnalia/CSIC.IETcc - LABEIN-Tecnalia
  • W. Zhu University of the West of Scotland
  • T. Howind University of the West of Scotland

DOI:

https://doi.org/10.3989/mc.2011.00511

Keywords:

C3S, C2S, C-S-H gel, textural characterization and nanoindentation

Abstract


The textural and mechanical characterization of C-S-H gels formed from the hydration of pure T1-C3S, β-C2S and their blends are studied by Nitrogen sorption and nanoindentation experiments. The surface area and nanoporosity of C-S-H gels formed from the hydration of β-C2S and the 30-70 (T1-C3S and β-C2S mixture) are higher than those from hydration of T1-C3S, and 70-30, with the difference decreasing with hydration age. Such changes are well supported by findings of nanoindentation study, which shows the greater relative volume of C-S-H phases with lower densities in the β-C2S and the 30-70 pastes. With the increase in hydration age, the relative volume of C-S-H phases with higher densities increased at the expenses of those with lower density. Important quantitative correlations were found among these textural characteristics and the mean chain length, determined from 29Si magic-angle-spinning (MAS) NMR, of the C-S-H gels.

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References

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Published

2011-06-30

How to Cite

Goñi, S., Guerrero, A., Puertas, F., Hernández, M. S., Palacios, M., Dolado, J. S., Zhu, W., & Howind, T. (2011). Textural and mechanical characterization of C-S-H gels from hydration of synthetic T1-C3S, β-C2S and their blends. Materiales De Construcción, 61(302), 169–183. https://doi.org/10.3989/mc.2011.00511

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