Thermal degradation in Carrara marbles as the cause of deformation of cladding slabs
Marble slabs, typically used as façade panels to externally cover buildings, might permanently deform after a certain time of environmental exposure. This phenomenon, called bowing, is generally accompanied by a reduction of strength which increases with increasing degree of bowing. In the present...
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| Format: | Article |
| Language: | English |
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Gruppo Italiano Frattura
2014-10-01
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| Series: | Fracture and Structural Integrity |
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| Online Access: | http://www.gruppofrattura.it/pdf/rivista/numero30/numero_30_art_19.pdf |
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| _version_ | 1841562856009498624 |
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| author | A. Spagnoli M. Migliazza M. Zucali A.M. Ferrero |
| author_facet | A. Spagnoli M. Migliazza M. Zucali A.M. Ferrero |
| author_sort | A. Spagnoli |
| collection | DOAJ |
| description | Marble slabs, typically used as façade panels to externally cover buildings, might permanently
deform after a certain time of environmental exposure. This phenomenon, called bowing, is generally
accompanied by a reduction of strength which increases with increasing degree of bowing. In the present paper,
a theoretical model to calculate the progressive bowing of marble slabs submitted to temperature cycles is
briefly recalled and applied to a specific Carrara marble sample. The marble is investigated by a microscopic
analysis of thin sections cut along three orthogonal directions. The digital photographs are treated by an image
analysis code which is capable of extracting grain size and shape distributions. In this way the anisotropic
microstructure of the marble is quantified and taken into account in the numerical analyses. The influence of
size distribution of grains as well as of their distribution of optic axis orientation on the slab bowing is discussed
with the attempt of offering a quantitative tool for a better understanding of in situ bowing measurements. |
| format | Article |
| id | doaj-art-81a0e000355d49b08ec7274e8586fefc |
| institution | Kabale University |
| issn | 1971-8993 1971-8993 |
| language | English |
| publishDate | 2014-10-01 |
| publisher | Gruppo Italiano Frattura |
| record_format | Article |
| series | Fracture and Structural Integrity |
| spelling | doaj-art-81a0e000355d49b08ec7274e8586fefc2025-01-03T00:40:08ZengGruppo Italiano FratturaFracture and Structural Integrity1971-89931971-89932014-10-0183014515210.3221/IGF-ESIS.30.19 Thermal degradation in Carrara marbles as the cause of deformation of cladding slabsA. Spagnoli 0M. Migliazza 1M. Zucali 2A.M. Ferrero 3Università di Parma Università di Milano Università di Milano Università di Torino Marble slabs, typically used as façade panels to externally cover buildings, might permanently deform after a certain time of environmental exposure. This phenomenon, called bowing, is generally accompanied by a reduction of strength which increases with increasing degree of bowing. In the present paper, a theoretical model to calculate the progressive bowing of marble slabs submitted to temperature cycles is briefly recalled and applied to a specific Carrara marble sample. The marble is investigated by a microscopic analysis of thin sections cut along three orthogonal directions. The digital photographs are treated by an image analysis code which is capable of extracting grain size and shape distributions. In this way the anisotropic microstructure of the marble is quantified and taken into account in the numerical analyses. The influence of size distribution of grains as well as of their distribution of optic axis orientation on the slab bowing is discussed with the attempt of offering a quantitative tool for a better understanding of in situ bowing measurements.http://www.gruppofrattura.it/pdf/rivista/numero30/numero_30_art_19.pdfBowingCrack propagationFracture mechanicsMarbleThermal cycles |
| spellingShingle | A. Spagnoli M. Migliazza M. Zucali A.M. Ferrero Thermal degradation in Carrara marbles as the cause of deformation of cladding slabs Fracture and Structural Integrity Bowing Crack propagation Fracture mechanics Marble Thermal cycles |
| title | Thermal degradation in Carrara marbles as the cause of deformation of cladding slabs |
| title_full | Thermal degradation in Carrara marbles as the cause of deformation of cladding slabs |
| title_fullStr | Thermal degradation in Carrara marbles as the cause of deformation of cladding slabs |
| title_full_unstemmed | Thermal degradation in Carrara marbles as the cause of deformation of cladding slabs |
| title_short | Thermal degradation in Carrara marbles as the cause of deformation of cladding slabs |
| title_sort | thermal degradation in carrara marbles as the cause of deformation of cladding slabs |
| topic | Bowing Crack propagation Fracture mechanics Marble Thermal cycles |
| url | http://www.gruppofrattura.it/pdf/rivista/numero30/numero_30_art_19.pdf |
| work_keys_str_mv | AT aspagnoli thermaldegradationincarraramarblesasthecauseofdeformationofcladdingslabs AT mmigliazza thermaldegradationincarraramarblesasthecauseofdeformationofcladdingslabs AT mzucali thermaldegradationincarraramarblesasthecauseofdeformationofcladdingslabs AT amferrero thermaldegradationincarraramarblesasthecauseofdeformationofcladdingslabs |