Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Quantification methods for chloride binding in Portland cement and limestone systems
Abstract This paper presents a comparison of methods to quantify the chloride binding capacity for cementitious materials composed of Ordinary Portland Cement (OPC) and Limestone (LS, 0 to 55% replacement). Physical and chemical chloride bindings were investigated to better understand the binding capacity of the different systems and to provide basic information for modelling. Cement pastes samples were exposed to a 0.5 M NaCl solution and their chloride contents were quantified as free ions in pore solution, chemically bound ions in AFm phases, and physically bound ions on Calcium-Aluminum-Silicate-Hydrates (C–A–S–H). Notably, the study showed that (1) considering a solid solution between Friedel's salt and Hemicarboaluminate (Hc) was necessary for the quantification of chemically bound chlorides in limestone blended system and (2) an accurate estimation of the C–A–S–H content was critical for quantifying physically bound chlorides.
Quantification methods for chloride binding in Portland cement and limestone systems
Abstract This paper presents a comparison of methods to quantify the chloride binding capacity for cementitious materials composed of Ordinary Portland Cement (OPC) and Limestone (LS, 0 to 55% replacement). Physical and chemical chloride bindings were investigated to better understand the binding capacity of the different systems and to provide basic information for modelling. Cement pastes samples were exposed to a 0.5 M NaCl solution and their chloride contents were quantified as free ions in pore solution, chemically bound ions in AFm phases, and physically bound ions on Calcium-Aluminum-Silicate-Hydrates (C–A–S–H). Notably, the study showed that (1) considering a solid solution between Friedel's salt and Hemicarboaluminate (Hc) was necessary for the quantification of chemically bound chlorides in limestone blended system and (2) an accurate estimation of the C–A–S–H content was critical for quantifying physically bound chlorides.
Quantification methods for chloride binding in Portland cement and limestone systems
Sui, Shiyu (Autor:in) / Wilson, William (Autor:in) / Georget, Fabien (Autor:in) / Maraghechi, Hamed (Autor:in) / Kazemi-Kamyab, Hadi (Autor:in) / Sun, Wei (Autor:in) / Scrivener, Karen (Autor:in)
09.08.2019
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Role of calcium on chloride binding in hydrated Portland cement–metakaolin–limestone blends
| BASE | 2017
Role of calcium on chloride binding in hydrated Portland cement–metakaolin–limestone blends
| British Library Online Contents | 2017
Role of calcium on chloride binding in hydrated Portland cement–metakaolin–limestone blends
| British Library Online Contents | 2017