Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Does stored granulated blastfurnace slag lose its reactivity?
The production of granulated blastfurnace slag and its use as a cement constituent is subject to cyclical fluctuations. This can result in the need to place the slag in intermediate storage for fairly long periods. The question as to whether this is associated with a loss of reactivity has been discussed heatedly in the past. The FEhS-Institut für Baustoff-Forschung (Institute for Building Materials Research) therefore carried out investigations in which two granulated blastfurnace slags were stored for 4 and 5 1/2 years respectively under both dry and moist conditions. The investigations showed that even after years the largest percentage of granulated blastfurnace slag grains by volume were present unchanged in a glassy state. This also means that they are not easier to grind. Comparison of the physical cement properties at the start and end of storage showed that there is no reduction in reactivity if the granulated blastfurnace slag is correctly processed, particularly with respect to a comparable particle size distribution. However, the water demand of slag-rich cements may be slightly increased.
Does stored granulated blastfurnace slag lose its reactivity?
The production of granulated blastfurnace slag and its use as a cement constituent is subject to cyclical fluctuations. This can result in the need to place the slag in intermediate storage for fairly long periods. The question as to whether this is associated with a loss of reactivity has been discussed heatedly in the past. The FEhS-Institut für Baustoff-Forschung (Institute for Building Materials Research) therefore carried out investigations in which two granulated blastfurnace slags were stored for 4 and 5 1/2 years respectively under both dry and moist conditions. The investigations showed that even after years the largest percentage of granulated blastfurnace slag grains by volume were present unchanged in a glassy state. This also means that they are not easier to grind. Comparison of the physical cement properties at the start and end of storage showed that there is no reduction in reactivity if the granulated blastfurnace slag is correctly processed, particularly with respect to a comparable particle size distribution. However, the water demand of slag-rich cements may be slightly increased.
Does stored granulated blastfurnace slag lose its reactivity?
Verliert gelagerter Hüttensand seine Reaktivität?
Ehrenberg, A. (Autor:in)
Cement International ; 10 ; 64-79
2012
15 Seiten, 16 Bilder, 10 Tabellen, 16 Quellen
Aufsatz (Zeitschrift)
Englisch , Deutsch
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