Practical evidence and experimental demonstration of the Liesegang phenomenon in the carbonation process of lime mortars in exposed masonries.
Liesegang rings have been noticed in laboratory experiments with lime mortars but very few references mention their presence in mortars exposed outdoors. To date, authors have linked the occurrence of Liesegang patterns to mortars prepared with long matured limes, but here we show that very coarse a...
| Publicado en: | Journal of Cultural Heritage Vol. 45; pp. 169 - 180 |
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| Formato: | Artículo |
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Elsevier B.V.
Sep2020
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| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=hlh&AN=146616142&site=ehost-live header: @attributes: shortDbName: hlh uiTerm: 146616142 longDbName: Humanities International Complete uiTag: AN controlInfo: bkinfo: jinfo: jid: 12962074 KK8 jtl: Journal of Cultural Heritage issn: 12962074 maglogo: N pubinfo: dt: Sep2020 vid: 45 pid: 467 pub: Elsevier B.V. artinfo: ui: 146616142 10.1016/j.culher.2020.02.015 ppf: 169 ppct: 11 formats: tig: atl: Practical evidence and experimental demonstration of the Liesegang phenomenon in the carbonation process of lime mortars in exposed masonries. aug: au: Rodrigues, José Delgado affil: National Laboratory of Civil Engineering (ret.), Av. Brasil 101, 1700-066 Lisbon, Portugal su: Mortar Masonry Diffusion processes Space law sug: subj: Mortar Masonry Diffusion processes Space law keyword: Drying process Liesegang phenomenon Lime carbonation Lime mortars Spacing law ab: Liesegang rings have been noticed in laboratory experiments with lime mortars but very few references mention their presence in mortars exposed outdoors. To date, authors have linked the occurrence of Liesegang patterns to mortars prepared with long matured limes, but here we show that very coarse and poor quality lime mortars may also develop similar patterns. SEM observations and EDS measurements on samples taken from exposed mortars show that calcium content varies along the banding sequence, and measurements made along naturally occurring banded patterns prove that the spacing law characteristic of the Liesegang phenomenon applies to them. One case showed that the carbonation banding follows a trendily revert pattern, while a second one fits in an equidistant-type pattern. The occurrence of such irregular patterns may be governed by the presence of a drying process superimposed on the normal diffusion process along the carbonation front. pubtype: Academic Journal doctype: Article src: R language: English refInfo: copyright: @attributes: flag: Y dt: @attributes: year: 2020 holdings: @attributes: islocal: N |
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