Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Effect of aluminum on the structure of synthetic alkali-silica gels
Abstract The use of supplementary cementitious materials, such as fly ash, ground-granulated blast furnace slag (GGBFS), or metakaolin, in cement and concrete, is known to increase the amount of aluminum in the system and enhance its resistance against the alkali-silica reaction (ASR). It is, however, not yet sufficiently understood to what extent aluminum affects the structure of alkali-silica gels and how such a potential incorporation of aluminum contributes additionally to the beneficial effect of aluminum on ASR. In this study, various alkali-silica gels with different aluminum content were synthesized and structurally characterized. The results show that aluminum can be incorporated into the alkali-silica gel structure in four- and six-fold coordination, thus leading to a structural change. The incorporation of aluminum may increase the connectivity and the degree of polymerization within the gel framework. Based on the results, a 3D structural model for an aluminum-containing alkali-silica gel was created.
Effect of aluminum on the structure of synthetic alkali-silica gels
Abstract The use of supplementary cementitious materials, such as fly ash, ground-granulated blast furnace slag (GGBFS), or metakaolin, in cement and concrete, is known to increase the amount of aluminum in the system and enhance its resistance against the alkali-silica reaction (ASR). It is, however, not yet sufficiently understood to what extent aluminum affects the structure of alkali-silica gels and how such a potential incorporation of aluminum contributes additionally to the beneficial effect of aluminum on ASR. In this study, various alkali-silica gels with different aluminum content were synthesized and structurally characterized. The results show that aluminum can be incorporated into the alkali-silica gel structure in four- and six-fold coordination, thus leading to a structural change. The incorporation of aluminum may increase the connectivity and the degree of polymerization within the gel framework. Based on the results, a 3D structural model for an aluminum-containing alkali-silica gel was created.
Effect of aluminum on the structure of synthetic alkali-silica gels
Krüger, Miriam E. (Autor:in) / Heisig, Anne (Autor:in) / Hilbig, Harald (Autor:in) / Eickhoff, Henrik (Autor:in) / Heinz, Detlef (Autor:in) / Machner, Alisa (Autor:in)
29.12.2022
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Effect of Aluminum on Synthesized and Naturally Formed Alkali-Silica Gels
| Springer Verlag | 2024
| Elsevier | 2024