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Properties of repair mortars - potentials and risks of a tailor-made mixture proportioning

  • Despite the numerous possibilities to influence the properties of repair mortars by modifications of the mixture proportioning, it is almost impossible to change an individual property without influencing other mortar properties. When optimising a mixture, it has to be decided for each individual case, which of the mortar properties needs to be treated with the highest priority. Most properties can be altered by several different measures, which may vary in effectiveness, side effects and cost efficiency. As the prevention of shrinkage induced constraining cracks is crucial for the durability and Service life of a concrete repair task, in the presented paper special attention is paid to the influences on the mortar’s shrinkage behaviour. On the basis of parameter studies it is shown, how it may be beneficial in certain cases to accept the worsening of some general properties if by this measure another property, which is essential for the individual application task, can be enhancedDespite the numerous possibilities to influence the properties of repair mortars by modifications of the mixture proportioning, it is almost impossible to change an individual property without influencing other mortar properties. When optimising a mixture, it has to be decided for each individual case, which of the mortar properties needs to be treated with the highest priority. Most properties can be altered by several different measures, which may vary in effectiveness, side effects and cost efficiency. As the prevention of shrinkage induced constraining cracks is crucial for the durability and Service life of a concrete repair task, in the presented paper special attention is paid to the influences on the mortar’s shrinkage behaviour. On the basis of parameter studies it is shown, how it may be beneficial in certain cases to accept the worsening of some general properties if by this measure another property, which is essential for the individual application task, can be enhanced significantly. In general a tailor-made approach for the mixture proportioning seems beneficial but due to the complexity of the constituents’ interactions in repair mortars, it bears a high risk of unexpected malfunctions.zeige mehrzeige weniger

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Autor*innen:Peter Ramge, Hans-Carsten KühneORCiD, Birgit MengORCiD
Dokumenttyp:Beitrag zu einem Tagungsband
Veröffentlichungsform:Verlagsliteratur
Sprache:Englisch
Titel des übergeordneten Werkes (Englisch):Concrete-Workshop 'Performance-based specifications for concrete' (Proceedings)
Jahr der Erstveröffentlichung:2011
Herausgeber (Institution):MFPA Leipzig GmbH - Gesellschaft für Materialforschung und Prüfungsanstalt für das Bauwesen
Erste Seite:319
Letzte Seite:329
Freie Schlagwörter:Concrete rehabilitation; Polymer cement mortar (PCC); Repair mortar; Repair systems; Sprayed polymer cement mortar (SPCC)
Veranstaltung:Concrete-Workshop 'Performance-based specifications for concrete'
Veranstaltungsort:Leipzig, Germany
Beginndatum der Veranstaltung:14.06.2011
Enddatum der Veranstaltung:15.06.2011
ISBN:978-3-9814523-0-3
Verfügbarkeit des Dokuments:Datei im Netzwerk der BAM verfügbar ("Closed Access")
Datum der Freischaltung:19.02.2016
Referierte Publikation:Nein
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