Search Results - "Bernard, Ellina"

Effective cation exchange capacity of calcium silicate hydrates (C-S-H) by Bernard, Ellina, Yan, Yiru, Lothenbach, Barbara

“…The binding of alkalis and calcium to calcium silicate hydrate (C-S-H) can be measured by cation exchange using cobalt hexamine solution with adapted pH. The…”
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Research progress on magnesium silicate hydrate phases and future opportunities by Bernard, Ellina

“…This short letter summaries the latest research on the structure and thermodynamic modelling of the magnesium silicate hydrates (M-S-H) phases. M-S-H structure…”
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Characterization of magnesium silicate hydrate (M-S-H) by Bernard, Ellina, Lothenbach, Barbara, Chlique, Christophe, Wyrzykowski, Mateusz, Dauzères, Alexandre, Pochard, Isabelle, Cau-Dit-Coumes, Céline

“…In this study, the structure of synthetic magnesium silicate hydrated phases (M-S-H) and the distribution of water as a function of the Mg/Si ratio were…”
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Zeolite formation in the presence of cement hydrates and albite by Lothenbach, Barbara, Bernard, Ellina, Mäder, Urs

“…Zeolite formation caused by interactions between cement hydrates and rock forming minerals was investigated by two sets of batch experiments and supported by…”
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Influence of sodium nitrate on the phases formed in the MgO-Al2O3-SiO2-H2O system by Bernard, Ellina, Lothenbach, Barbara, Rentsch, Daniel

“…The incorporation of sodium and aluminium in magnesium silicate hydrate phases (M-S-H), possible binding phases in magnesium silicate cement, was investigated…”
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Effect of carbonates on the formation of magnesium silicate hydrates by Bernard, Ellina, Lothenbach, Barbara, Rentsch, Daniel, German, Alexander, Winnefeld, Frank

“…The effect of carbonates on the formation of magnesium silicate hydrate phases (M-S-H) was investigated in paste experiments. At molar ratio Mg/Si = 1.5, M-S-H…”
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Effect of aluminate and carbonate in magnesia silicate cement by Bernard, Ellina, Lothenbach, Barbara, German, Alexander, Rentsch, Daniel, Winnefeld, Frank

“…The effect of alumina and carbonates on magnesium silicate hydrate (M-S-H) cements was investigated at high Mg/Si ratios (1.5–2.5), constant Na2CO3…”
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MgO-based cements – Current status and opportunities by Bernard, Ellina, Nguyen, Hoang, Kawashima, Shiho, Lothenbach, Barbara, Manzano, Hegoi, Provis, John, Scott, Allan, Unluer, Cise, Winnefeld, Frank, Kinnunen, Paivo

“…The cement industry is a major contributor to the anthropogenic CO2 emissions, with about 8% of all emissions coming from this sector. The global cement and…”
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Immobilization of (Aqueous) Cations in Low pH M-S-H Cement by Marsiske, Maximilian R., Debus, Christian, Di Lorenzo, Fulvio, Bernard, Ellina, Churakov, Sergey V., Ruiz-Agudo, Cristina

“…Incorporation of heavy metal ions in cement hydrates is of great interest for the storage and immobilization of toxic, hazardous, and radioactive wastes using…”
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Magnesium silicate hydrate (M-S-H) stability under carbonation by Bernard, Ellina, Nguyen, Hoang

“…This work offers in-depth understanding about the behavior of different M-S-H phases under carbonation. Here, we carbonated 8-year-old M-S-H samples under i)…”
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Stability of hydrotalcite (Mg-Al layered double hydroxide) in presence of different anions by Bernard, Ellina, Zucha, Wolfgang Jan, Lothenbach, Barbara, Mäder, Urs

“…MgO contained in cementitious materials is experimentally observed to precipitate as poorly crystalline hydrotalcite (Mg-Al LDH). However, the geochemical…”
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Effect of magnesium on calcium silicate hydrate (C-S-H) by Bernard, Ellina, Lothenbach, Barbara, Le Goff, Fabien, Pochard, Isabelle, Dauzères, Alexandre

“…The addition of MgCl2 to synthetic calcium silicate hydrate (C-S-H) with Ca/Si=0.8 lowers the pH values below 10. Experimental observations and thermodynamic…”
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Earth stabilisation with MgO-based cement by Bernard, Ellina, Rentsch, Daniel, Kuhn, Raphael, Habert, Guillaume, Lura, Pietro

“…This study compares, for the first time, MgO-based (MB) cement and Portland-based (PB) cement for stabilizing earth mortars. While MB and PB earth mortars…”
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Phase changes in cementitious materials exposed to saline solutions by De Weerdt, Klaartje, Bernard, Ellina, Kunther, Wolfgang, Pedersen, Malene Thostrup, Lothenbach, Barbara

“…This article summarizes long-term degradation mechanisms of cementitious materials in contact with fresh and saline solutions based on a review of experimental…”
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Impact of silt chemical composition on deflocculation and coagulation of clay-rich paste by Ardant, Daria, Brumaud, Coralie, Zosso, Nino, Bernard, Ellina, Habert, Guillaume

“…This paper investigates the impact of the chemical composition of two silts, quartz and limestone, on the deflocculation/coagulation process for poured earth…”
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Kinetics of Al uptake in synthetic calcium silicate hydrate (C-S-H) by Yan, Yiru, Bernard, Ellina, Miron, G. Dan, Rentsch, Daniel, Ma, Bin, Scrivener, Karen, Lothenbach, Barbara

“…The effect of equilibration time on the composition, structure and solubility of calcium aluminate silicate hydrate (C-A-S-H) was investigated in 0.5 M NaOH…”
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Formation of magnesium silicate hydrates (M-S-H) by Bernard, Ellina, Lothenbach, Barbara, Rentsch, Daniel, Pochard, Isabelle, Dauzères, Alexandre

“…The formation of magnesium silicate hydrates (M-S-H) with MgO to SiO2 ratios from 0.7 to 1.6 has been studied at 20, 50 and 70 °C. TGA and XRD data reveal that…”
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Percolation experiment across a 10-year-old interface between Opalinus Clay and Portland concrete by Bernard, Ellina, Jenni, Andreas, Toropovs, Nikolajs, Mäder, Urs

“…An interface sample between Portland concrete and Opalinus Clay with a contact time of 10 years recovered from a field experiment was investigated by SEM-EDX…”
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Magnesium and calcium silicate hydrates, Part I: Investigation of the possible magnesium incorporation in calcium silicate hydrate (C-S-H) and of the calcium in magnesium silicate hydrate (M-S-H) by Bernard, Ellina, Lothenbach, Barbara, Cau-Dit-Coumes, Céline, Chlique, Christophe, Dauzères, Alexandre, Pochard, Isabelle

“…Calcium silicate hydrate (C-S-H) and magnesium silicate hydrate (M-S-H) have been described as two separate phases. This work investigates their stability…”
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Magnesium and calcium silicate hydrates, Part II: Mg-exchange at the interface “low-pH” cement and magnesium environment studied in a C-S-H and M-S-H model system by Bernard, Ellina, Dauzères, Alexandre, Lothenbach, Barbara

“…“Low-pH” cementitious materials have been developed in the context of nuclear wastes encapsulation to reduce the alkaline plume and the early hydration heat…”
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