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The influence of supplementary cementing materials on the dissolution of aggregates in alkaline solutions

  • Starting from expansion measurements on concrete prisms, produced with two different alkali reactive aggregates, the influence of two aluminium containing SCMs on the expansion of concrete prisms and on the solubility of the aggregates in an alkaline solution were investigated. The solubility of aggregates in an alkaline solution reflects the alkali reactivity of the corresponding aggregate. Initially, the solubility experiments with the aggregates and SCMs were made separately and then in mixtures of each aggregate and SCM. In a further step, the SCMs were stored in KOH solutions containing Ca(OH)2. The concentrations of SiO2 and Al2O3 were determined to investigate the effect of calcium on the solving processes of SCMs. The combination of concrete expansion test and dissolution experiments of two alkali reactive aggregates and two aluminium containing SCMs allows first conclusions about the influence of such SCMs on the reactivity of aggregates.

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Metadaten
Author: Yvonne Scholz, Cornelia Hübert, Klaus-Jürgen HüngerGND
Title of the source (English):ICAAR, 15th International Conference on Alkali Aggregate Reaction, July 03-07, 2016, Sao Paulo, Brazil, abstracts
Publisher:ICAAR
Document Type:Conference Proceeding
Language:English
Year of publication:2016
Tag:alkali silica reaction; solubility of SCM; solubility of aggregate; supplementary cementing materials (SCM)
First Page:S. 43
Faculty/Chair:Fakultät 6 Architektur, Bauingenieurwesen und Stadtplanung / FG Baustoffe und Bauchemie
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