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2019-06-14Zeitschriftenartikel DOI: 10.3390/heritage2020102
Raman Microspectroscopic Imaging of Binder Remnants in Historical Mortars Reveals Processing Conditions
dc.contributor.authorSchmid, Thomas
dc.contributor.authorDariz, Petra
dc.date.accessioned2019-09-04T11:50:52Z
dc.date.available2019-09-04T11:50:52Z
dc.date.issued2019-06-14none
dc.date.updated2019-08-10T08:35:25Z
dc.identifier.urihttp://edoc.hu-berlin.de/18452/21239
dc.description.abstractBinder remnants in historical mortars represent a record of the connection between the raw materials that enter the kiln, the process parameters, and the end product of the calcination. Raman microspectroscopy combines high structural sensitivity with micrometre to sub-micrometre spatial resolution and compatibility with conventional thin-sectional samples in an almost unique fashion, making it an interesting complementary extension of the existing methodological arsenal for mortar analysis. Raman spectra are vibrational fingerprints of crystalline and amorphous compounds, and contain marker bands that are specific for minerals and their polymorphic forms. Relative intensities of bands that are related to the same crystalline species change according to crystal orientations, and band shifts can be caused by the incorporation of foreign ions into crystal lattices, as well as stoichiometric changes within solid solution series. Finally, variations in crystallinity affect band widths. These effects are demonstrated based on the analysis of three historical mortar samples: micrometric distribution maps of phases and polymorphs, crystal orientations, and compositional variations of solid solution series of unreacted clinker grains in the Portland cement mortars of two 19th century castings, and the crystallinities of thermal anhydrite clusters in a high-fired medieval gypsum mortar as a measure for the applied burning temperature were successfully acquired.eng
dc.description.sponsorshipDeutsche Forschungsgemeinschaft
dc.language.isoengnone
dc.publisherHumboldt-Universität zu Berlin
dc.rights(CC BY 4.0) Attribution 4.0 Internationalger
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.subjectcement clinker remnantseng
dc.subjectpolymorphic transitionseng
dc.subjectstriationseng
dc.subjectremelted beliteeng
dc.subjecthigh-fired gypsumeng
dc.subjectthermal anhydriteeng
dc.subjectpyrometamorphismeng
dc.subjectspectroscopic imagingeng
dc.subjectRaman microscopyeng
dc.subject.ddc900 Geschichte, Geografie und Hilfswissenschaftennone
dc.titleRaman Microspectroscopic Imaging of Binder Remnants in Historical Mortars Reveals Processing Conditionsnone
dc.typearticle
dc.identifier.urnurn:nbn:de:kobv:11-110-18452/21239-9
dc.identifier.doi10.3390/heritage2020102none
dc.identifier.doihttp://dx.doi.org/10.18452/20473
dc.type.versionpublishedVersionnone
local.edoc.container-titleHeritagenone
local.edoc.pages22none
local.edoc.type-nameZeitschriftenartikel
local.edoc.institutionMathematisch-Naturwissenschaftliche Fakultätnone
local.edoc.container-typeperiodical
local.edoc.container-type-nameZeitschrift
local.edoc.container-publisher-nameMDPInone
local.edoc.container-publisher-placeBaselnone
local.edoc.container-volume2none
local.edoc.container-issue2none
local.edoc.container-firstpage1662none
local.edoc.container-lastpage1683none
dc.description.versionPeer Reviewednone
dc.identifier.eissn2571-9408
local.edoc.affiliationSchmid, Thomas; BAM Federal Institute for Materials Research and Testing, Richard-Willstätter-Str. 11, 12489 Berlin, Germany, School of Analytical Sciences Adlershof (SALSA), Humboldt-Universität zu Berlin, Unter den Linden 6, 10099 Berlin, Germany,none
local.edoc.affiliationDariz, Petra; School of Analytical Sciences Adlershof (SALSA), Humboldt-Universität zu Berlin, Unter den Linden 6, 10099 Berlin, Germany, Bern University of Applied Sciences, Bern University of the Arts, Conservation-Restoration, Fellerstr. 11, 3027 Bern, Switzerland,none

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