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Dissolution rate spectra of β-dicalcium silicate in water of varying activity
https://orcid.org/0000-0001-6699-2020
Abstract The surface normal dissolution flux of beta dicalcium silicate is quantified using in situ digital holographic microscopy. The dissolution flux in highly undersaturated flowing solutions depends on the water activity to an empirically determined power of 1.7. A heterogeneous distribution of reactive surface sites (e.g., crystalline defects) at the surface leads to a distribution of local fluxes. Accounting for the nominally unreactive and slowly reactive surface sites, the median of the macroscopic forward reaction dissolution flux distribution is −1.0 μmol m−2 s−1 with an interquartile range of 0.3 μmol m−2 s−1. Ex situ X-ray photoelectron spectroscopy indicates that the surface calcium-to-silicon ratio decreases by 10% after some dissolution.
Dissolution rate spectra of β-dicalcium silicate in water of varying activity
https://orcid.org/0000-0001-6699-2020
Abstract The surface normal dissolution flux of beta dicalcium silicate is quantified using in situ digital holographic microscopy. The dissolution flux in highly undersaturated flowing solutions depends on the water activity to an empirically determined power of 1.7. A heterogeneous distribution of reactive surface sites (e.g., crystalline defects) at the surface leads to a distribution of local fluxes. Accounting for the nominally unreactive and slowly reactive surface sites, the median of the macroscopic forward reaction dissolution flux distribution is −1.0 μmol m−2 s−1 with an interquartile range of 0.3 μmol m−2 s−1. Ex situ X-ray photoelectron spectroscopy indicates that the surface calcium-to-silicon ratio decreases by 10% after some dissolution.
Dissolution rate spectra of β-dicalcium silicate in water of varying activity
https://orcid.org/0000-0001-6699-2020
Abstract The surface normal dissolution flux of beta dicalcium silicate is quantified using in situ digital holographic microscopy. The dissolution flux in highly undersaturated flowing solutions depends on the water activity to an empirically determined power of 1.7. A heterogeneous distribution of reactive surface sites (e.g., crystalline defects) at the surface leads to a distribution of local fluxes. Accounting for the nominally unreactive and slowly reactive surface sites, the median of the macroscopic forward reaction dissolution flux distribution is −1.0 μmol m−2 s−1 with an interquartile range of 0.3 μmol m−2 s−1. Ex situ X-ray photoelectron spectroscopy indicates that the surface calcium-to-silicon ratio decreases by 10% after some dissolution.
Dissolution rate spectra of β-dicalcium silicate in water of varying activity
Brand, Alexander S. (author) / Gorham, Justin M. (author) / Bullard, Jeffrey W. (author)
Cement and Concrete Research ; 118 ; 69-83
2019-02-21
15 pages
Article (Journal)
Electronic Resource
English
Dissolution rate spectra of β-dicalcium silicate in water of varying activity
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