The influence of water-repellent admixtures on the behaviour and the effectiveness of Portland limestone cement mortars
- Water-repellent mortars were prepared using different hydrophobic compounds as admixtures. Calcium and zinc stearates, silane/siloxane products (as liquid solution and powder) were mixed into limestone cement mortars for obtaining in-bulk water-repellent mortars suitable for building protection and resistant to the degrading action of water. The influences of the admixtures on the hydration and structure of the designed mortars were investigated by SEM, TG–DSC, FT-IR, XRD, and isothermal calorimetry. The effectiveness of these agents against water action was evaluated by using techniques and methods such as mercury intrusion porosimetry, water absorption tests and contact angle measurements. Siloxane products conveyed good water-repellent effectiveness, without strongly influencing the setting and hydration of the binder, while the zinc stearates slowed down the hydration reactions.
Autor*innen: | L. Falchi, E. Zendri, U. Müller, Patrick Fontana |
---|---|
Dokumenttyp: | Zeitschriftenartikel |
Veröffentlichungsform: | Verlagsliteratur |
Sprache: | Englisch |
Titel des übergeordneten Werkes (Englisch): | Cement & concrete composites |
Jahr der Erstveröffentlichung: | 2015 |
Verlag: | Elsevier Ltd. |
Verlagsort: | Barking, Essex |
Jahrgang/Band: | 59 |
Erste Seite: | 107 |
Letzte Seite: | 118 |
Freie Schlagwörter: | Hydration products; Pore size distribution; Portland limestone cement mortars; Siloxanes; Stearates; Water repellent admixtures |
DOI: | 10.1016/j.cemconcomp.2015.02.004 |
ISSN: | 0958-9465 |
ISSN: | 1873-393X |
Verfügbarkeit des Dokuments: | Datei im Netzwerk der BAM verfügbar ("Closed Access") |
Datum der Freischaltung: | 20.02.2016 |
Referierte Publikation: | Ja |
Datum der Eintragung als referierte Publikation: | 11.05.2015 |