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Hydric behavior of earth materials and the effects of their stabilization with cement or lime: Study on repair mortars for historical rammed earth structures

2016-07Journal article Restricted access
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dc.contributor.authorGomes, Maria
dc.contributor.authorDiaz Gonçalves, Teresa
dc.contributor.authorFaria, Paulina
dc.date.accessioned2019-02-22T11:13:17Z
dc.date.available2019-02-22T11:13:17Z
dc.date.issued2016-07
dc.description.abstractEarthen building materials bear interesting environmental advantages and are the most appropriate to conserve historical earth constructions. To improve mechanical properties, these materials are often stabilized with cement or lime, but the impact of the stabilizers on the water transport properties, which are also critical, has been very rarely evaluated. The researchers have tested four earth-based repair mortars applied on three distinct and representative rammed earth surfaces. Three mortars are based on earth collected from rammed earth buildings in south of Portugal and the fourth mortar is based on a commercial clayish earth. The main objective of the work was over the commercial earth mortar, applied stabilized and not stabilized on the three rammed earth surfaces to repair, to assess the influence of the stabilizers. The other three earth mortars (not stabilized) were applied on each type of rammed earth, representing the repair only made with local materials. The four unstabilized earth materials depicted nonlinear dependence on t1/2 during capillary suction. This behavior was probably caused by clay swelling. Stabilization with any of the four tested binders enabled the linear dependence of t1/2 expected from Washburn's equation, probably because the swelling did not take place in this case. However, the stabilizers also significantly increased the capillary suction and the capillary porosity of the materials. This means that, in addition to increasing the carbon footprint, stabilizers, like cement and lime, have functional disadvantages that discourage their use in repair mortars for raw earth construction.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationGOMES, Maria Idália; GONÇALVES, Teresa Diaz; FARIA, Paulina – Hydric behavior of earth materials and the effects of their stabilization with cement or lime: Study on repair mortars for historical rammed earth structures. Journal of Materials in Civil Engineering. ISSN 0899-1561. Vol. 28, N.º 7 (2016), pp. 1-11pt_PT
dc.identifier.doi10.1061/(ASCE)MT.1943-5533.0001536pt_PT
dc.identifier.issn0899-1561
dc.identifier.issn1943-5533
dc.identifier.urihttp://hdl.handle.net/10400.21/9571
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherAmerican Society of Civil Engineerspt_PT
dc.subjectRammed earthpt_PT
dc.subjectRepair mortarpt_PT
dc.subjectStabilizationpt_PT
dc.subjectBinderpt_PT
dc.subjectWater transportpt_PT
dc.titleHydric behavior of earth materials and the effects of their stabilization with cement or lime: Study on repair mortars for historical rammed earth structurespt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage11pt_PT
oaire.citation.issue7pt_PT
oaire.citation.startPage1pt_PT
oaire.citation.titleJournal of Materials in Civil Engineeringpt_PT
oaire.citation.volume28pt_PT
person.familyNameIdália da Gomes
person.familyNameDiaz Gonçalves
person.familyNameFaria
person.givenNameMaria
person.givenNameTeresa
person.givenNamePaulina
person.identifier833004
person.identifier.ciencia-id0110-9A5F-A165
person.identifier.ciencia-idC113-939C-6FF0
person.identifier.ciencia-id8710-990F-E845
person.identifier.orcid0000-0002-2880-5359
person.identifier.orcid0000-0002-9321-3667
person.identifier.orcid0000-0003-0372-949X
person.identifier.ridF-8265-2014
person.identifier.scopus-author-id14011800300
person.identifier.scopus-author-id55515104200
rcaap.rightsclosedAccesspt_PT
rcaap.typearticlept_PT
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relation.isAuthorOfPublicationef0d4a1a-f29e-4317-a848-161c543e5fe1
relation.isAuthorOfPublication.latestForDiscovery2cc2a8b9-07c9-4d5b-b22b-9fc138f382af

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