Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Silica Granulates in Concrete: Dispersion and Durability Aspects
Condensed silica fume (CSF), also known as microsilia, is widely used as an addition to concrete. It is used to improve concrete properties, both in the fresh and the hardened state, and works both as a microfiller and as a very active pozzolan. On the market CSF is sold both as a granulate and as a slurry. In several cases, when analyzing concrete samples the authors have observed undispersed silica granulates up to a size of an mm. As it obviously is difficult to disperse granulated CSF properly, the firm aim of this investigation was to find the requirements for a good dispersion. The second objective of this work was to find the requirements necessary for the expansion, to be able to avoid damage. Moreover, it is known/1/that undispersed granulated CSF may induce alkali-silica reactions. In the concrete, the CSF nodules will act as extremely reactive silica. The second objective of the work was to find the requirements necessary for expansion, to be able to avoid damage. The third purpose of the research is to cast some light on the chemical systems controlling both the ASR and the possolanic reactions in concrete.
Silica Granulates in Concrete: Dispersion and Durability Aspects
Condensed silica fume (CSF), also known as microsilia, is widely used as an addition to concrete. It is used to improve concrete properties, both in the fresh and the hardened state, and works both as a microfiller and as a very active pozzolan. On the market CSF is sold both as a granulate and as a slurry. In several cases, when analyzing concrete samples the authors have observed undispersed silica granulates up to a size of an mm. As it obviously is difficult to disperse granulated CSF properly, the firm aim of this investigation was to find the requirements for a good dispersion. The second objective of this work was to find the requirements necessary for the expansion, to be able to avoid damage. Moreover, it is known/1/that undispersed granulated CSF may induce alkali-silica reactions. In the concrete, the CSF nodules will act as extremely reactive silica. The second objective of the work was to find the requirements necessary for expansion, to be able to avoid damage. The third purpose of the research is to cast some light on the chemical systems controlling both the ASR and the possolanic reactions in concrete.
Silica Granulates in Concrete: Dispersion and Durability Aspects
B. Lagerblad (Autor:in) / P. Utkin (Autor:in)
1993
50 pages
Report
Keine Angabe
Englisch
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