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Interventions to historic masonries: Investigation of the bond mechanism between stones or bricks and grouts

Content Provider	Springer Nature Link
Author	Adami, Chryssi Elpida Vintzileou, Elizabeth
Copyright Year	2007
Abstract	Within the present work, the mechanism of bond is studied in composite grout/substrate specimens. Three types of tripartite (lime-pozzolan-cement) grouts are examined, combined with three substrates (two types of limestone and bricks). The interfaces between grout and substrate are characterized by means of mechanical tests in direct tension and shear. The in-time development of the tensile and shear bond strength is also investigated. In order to correlate the characteristics of the substrates and the obtained strengths of the interfaces, their surfaces and porosity are examined. The main conclusions of this study are that the studied tripartite grouts can develop tensile and shear bond strength comparable to Portland cement-based grouts, and that the value of the reached bond strength is governed mainly by the substrate characteristics and the binding properties of the grouts. The results of this project confirm the efficiency of tripartite lime-pozzolan-cement grouts with reduced Portland cement content for repair and strengthening of historic masonries. Dans ce travail, on étudie le mécanisme d’adhérence le long des surfaces matériau de base/coulis. On examine trois types de coulis tripartis (chaux-pouzzolane-ciment), en combinaison avec trois types de matériaux de base (deux types de pierres calcaires et briques). Les interfaces entre coulis et matériaux de base sont caractérisées par des épreuves en traction et au cisaillement. On examine aussi le développement de la résistance en traction et au cisaillement avec le temps. Afin de corréler les caractéristiques des matériaux de base et les résistances mesurées des interfaces, on fait des observations sur l’état et la porosité des interfaces. Les conclusions principales de cette étude sont que les coulis tripartis qu’on a étudié peuvent développer des résistances en traction et au cisaillement semblables à celles de coulis à base de ciment Portland et que l’adhérence obtenue dépend surtout des caractéristiques des matériaux de base ainsi que des caractéristiques d’adhérence des coulis. Les résultats de ce travail confirment l’efficacité des coulis tripartis (à contenu de ciment réduit) en tant que matériau de réparation et de renforcement des maçonneries historiques.
Starting Page	255
Ending Page	267
Page Count	13
File Format	PDF
ISSN	13595997
Journal	Materials and Structures
Volume Number	41
Issue Number	2
e-ISSN	18716873
Language	English
Publisher	Springer Netherlands
Publisher Date	2007-03-20
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Tripartite grouts Direct tension Shear Interfacial transition zone Bond mechanism Building Materials Civil Engineering Operating Procedures, Materials Treatment Mechanical Engineering Theoretical and Applied Mechanics Structural Mechanics
Content Type	Text
Resource Type	Article
Subject	Building and Construction Mechanics of Materials Materials Science Civil and Structural Engineering

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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