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Article Dans Une Revue Cement and Concrete Composites Année : 2017

Greening effect in slag cement materials

Résumé

This article presents the first spectroscopic data describing the processes responsible for the temporary blue-green coloration that forms during the hydration of various materials containing Ground Granulated Blast-furnace Slag (GGBS) under anoxic conditions. UV-visible-near infrared Diffuse Reflectance (DR) spectra demonstrate a striking similarity of the coloring center forming during the curing of a broad range of GGBS-bearing materials (pure GGBS with different compositions, mix Portland cement/GGBS (30/70), concrete and mortar). All spectra are similar to those of polysulfide complexes contained in the interlayer spacing of a synthetic green-colored hydrated calcium aluminate phase (AFm). This “greening effect” demonstrates a progressive oxidation of sulfide-based compounds initially contained in these materials during curing of GGBS bearing materials.
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Dates et versions

hal-01647795 , version 1 (24-11-2017)

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Domitille Le Cornec, Qirong Wang, Laurence Galoisy, Guillaume Renaudin, Laurent Izoret, et al.. Greening effect in slag cement materials. Cement and Concrete Composites, 2017, 84, pp.93 - 98. ⟨10.1016/j.cemconcomp.2017.08.017⟩. ⟨hal-01647795⟩
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