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Hydraulic lime mortars with siloxane for waterproofing historic masonry

Maravelaki Pagona

Απλή Εγγραφή


URIhttp://purl.tuc.gr/dl/dias/DE96FD32-C5EC-497E-80B2-0B1EA4B61378-
Αναγνωριστικόhttps://doi.org/10.1016/j.cemconres.2006.11.007-
Γλώσσαen-
Μέγεθος8 pagesen
ΤίτλοςHydraulic lime mortars with siloxane for waterproofing historic masonryen
ΔημιουργόςMaravelaki Pagonaen
ΔημιουργόςΜαραβελακη Παγωναel
ΕκδότηςElsevieren
ΠερίληψηMortars with different content of hydraulic lime and aggregates of a siliceous and carbonaceous nature differing in grain size, were designed for waterproofing historic masonry. The repair mortars design was taken into consideration the physico-chemical properties of the original ones. The water repellency of the designed mortars was enhanced through impregnation with an oligomeric organo-siloxane provided optimum water vapour permeability; this is due to the siloxane coating the capillaries without blocking the pores, as indicated from the slightly modified pore size distribution. The grain size of aggregates and the binder content influence the performance of mortars. Mortars with coarse aggregates develop high mechanical strength; nevertheless, micropores interconnected with macropores are responsible for the low salt-decay resistance. Increase of the binding content enhances the mechanical resistance but decreases the resistance to sulphate solutions, as a consequence of the small capillaries not allowing for salt crystallization. The mortar with the best performance consists of medium aggregates and a binder to aggregate ratio equal to 0.33; pores around 0.2 μm of radius enable salts to crystallize without provoking damage from crystallization pressure. The selected mortar, after fourteen months of application to the masonry, shows neither microcracks nor efflorescence formation.en
ΤύποςPeer-Reviewed Journal Publicationen
ΤύποςΔημοσίευση σε Περιοδικό με Κριτέςel
Άδεια Χρήσηςhttp://creativecommons.org/licenses/by/4.0/en
Ημερομηνία2015-11-02-
Ημερομηνία Δημοσίευσης2006-
Θεματική Κατηγορίαhistoric masonryen
Βιβλιογραφική ΑναφοράP. Maravelaki-Kalaitzaki, “Hydraulic lime-mortars with siloxane for waterproofing historic masonry," Cem. Con. Resea., vol. 37, no. 2, pp. 283-290, Feb. 2007. doi:10.1016/j.cemconres.2006.11.007en

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