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dc.contributor.authorPAVIA, SARA
dc.date.accessioned2013-05-08T20:47:53Z
dc.date.available2013-05-08T20:47:53Z
dc.date.issued2008
dc.date.submitted2008en
dc.identifier.citationHanley R. and Pavia S. , A study of the workability of natural hydraulic lime mortars and its influence on strength, Materials and Structures, 41, (2), 2008, p373 - 381en
dc.identifier.otherY
dc.identifier.urihttp://hdl.handle.net/2262/66461
dc.descriptionPUBLISHEDen
dc.description.abstractLime mortars are currently used for both repairs to historic buildings and new construction. An important mortar property is workability. Lime mortars are often described as highly workable, however, due to the many variables contributing to workability, this is difficult to quantify. Workability largely depends on water content, and this will greatly affect compressive and flexural strengths, which in turn will determine the overall quality and durability of a mortar. The objective of this paper is to examine the relationship between workability and strength of naturally hydraulic lime (NHL) mortars in order to optimize their properties for a more efficient use in building. To this aim, mortars of several hydraulic strengths were mixed with different water contents in order to vary flow diameters and charac- terize workability. Compressive and flexural strength were then tested to measure the effect of the initial flow on the strength of the hardened mortar. This paper demonstrates that NHL 3.5 and 5 mortars require a flow value close to that of 185 mm prescribed by the European standards whereas NHL 2 mixes require a significantly lower value. This paper concludes that one universal flow value is inadequate when trying to optimize strength of NHL mortars and that, in order to optimize strength,should be mixed to attain a different flow diameter for each hydraulic strength. However, other properties such as bond strength and water retention need to be considered before unique flow diameters are prescribed to lime mortars of different hydraulic strengths.en
dc.description.sponsorshipThe authors would like to thank Dr. H.M. Schiffner, of the Institut fur Kalk- und Mortelforschung e.V., Koln, Convenor of CEN TC 51/WG 11/TG 1 for taking this research into consideration within the EN 459-2 framework. This research was funded by the US-Ireland Alliance under the G. J. Mitchell Scholarship 2004?05. Materials were graciously donated by St Astier Limes, France, and The Traditional Lime Company, Ireland. The testing was carried out in the Dept. of Civil, Structural and Environmental Engineering, Trinity College Dublin. The authors thank Mr. Chris O?Donovan, for facilitating our laboratory work; Mr. Martin Carney for his help with testing in the Soils Laboratory; Mr. Eoin Dunne for his assistance with testing in the Materials Laboratory and Mr. Dave McAuley for building equipment. Their help is much appreciated. The authors also thank Ms. Luice Chevert for translating the abstracten
dc.format.extent373en
dc.format.extent381en
dc.language.isoenen
dc.publisherSpringeren
dc.relation.ispartofseriesMaterials and Structures;41, 2
dc.rightsYen
dc.subjectLime mortarsen
dc.subjectNaturally hydraulic lime (NHL)en
dc.titleA study of the workability of natural hydraulic lime mortars and its influence on strengthen
dc.typeJournal Articleen
dc.type.supercollectionscholarly_publicationsen
dc.type.supercollectionrefereed_publicationsen
dc.identifier.peoplefinderurlhttp://people.tcd.ie/pavias
dc.identifier.rssinternalid45347
dc.identifier.rssurihttp://www.springerlink.com/content/n036326476r211w0/


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