A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
An experimental investigation into the salt-weathering susceptibility of building limestones
https://orcid.org/0000-0002-1205-8563
Abstract Dimension and ornamental stones used for built heritage are frequently affected, under all climates, by intense weathering induced by the transport of saline solutions. Accordingly, researchers addressed the weathering mechanisms induced by salts (primarily $ Na_{2} $$ SO_{4} $), the stresses generated in the host material, and the durability of ornamental and dimension stones. This study investigates the behaviour of four sedimentary lithotypes, differing in texture and structure (Breccia Aurora, Rosso Verona, and fine- and coarse-grained Vicenza Stone) exposed to a selection of saline solutions, aiming at evaluating their susceptibility to weathering and the influence of petrographic features on durability. The chosen $ Na_{2} $$ SO_{4} $, $ MgSO_{4} $, $ Na_{2} $$ CO_{3} $, NaCl, and $ KNO_{3} $ solutions include the anions characterizing the major saline sources affecting built heritage: capillary rise, acid rain, atmospheric particulate deposition, bird or other animal scat, and de-icing salt contamination. The petrophysical properties of unweathered and salt-weathered samples were characterized by relative mass variation estimation, capillary rise, and hygroscopic absorption-based porosimetry. Scanning Electron Microscopy coupled with microprobe allowed studying the morphological changes triggered by weathering and analysing the chemical composition of the efflorescence crust. The whole of data, consistently with literature, allowed inferring pore type and distribution as the main intrinsic parameters controlling salt weathering susceptibility. Moreover, $ Na_{2} $$ SO_{4} $ and $ Na_{2} $$ CO_{3} $ proved to be the most harmful, probably due to their ability to crystallize in different hydration stages at room temperature. The comparative analysis of the induced weathering can help to choose suitable dimension stones for new buildings or restoration replacements.
An experimental investigation into the salt-weathering susceptibility of building limestones
https://orcid.org/0000-0002-1205-8563
Abstract Dimension and ornamental stones used for built heritage are frequently affected, under all climates, by intense weathering induced by the transport of saline solutions. Accordingly, researchers addressed the weathering mechanisms induced by salts (primarily $ Na_{2} $$ SO_{4} $), the stresses generated in the host material, and the durability of ornamental and dimension stones. This study investigates the behaviour of four sedimentary lithotypes, differing in texture and structure (Breccia Aurora, Rosso Verona, and fine- and coarse-grained Vicenza Stone) exposed to a selection of saline solutions, aiming at evaluating their susceptibility to weathering and the influence of petrographic features on durability. The chosen $ Na_{2} $$ SO_{4} $, $ MgSO_{4} $, $ Na_{2} $$ CO_{3} $, NaCl, and $ KNO_{3} $ solutions include the anions characterizing the major saline sources affecting built heritage: capillary rise, acid rain, atmospheric particulate deposition, bird or other animal scat, and de-icing salt contamination. The petrophysical properties of unweathered and salt-weathered samples were characterized by relative mass variation estimation, capillary rise, and hygroscopic absorption-based porosimetry. Scanning Electron Microscopy coupled with microprobe allowed studying the morphological changes triggered by weathering and analysing the chemical composition of the efflorescence crust. The whole of data, consistently with literature, allowed inferring pore type and distribution as the main intrinsic parameters controlling salt weathering susceptibility. Moreover, $ Na_{2} $$ SO_{4} $ and $ Na_{2} $$ CO_{3} $ proved to be the most harmful, probably due to their ability to crystallize in different hydration stages at room temperature. The comparative analysis of the induced weathering can help to choose suitable dimension stones for new buildings or restoration replacements.
An experimental investigation into the salt-weathering susceptibility of building limestones
https://orcid.org/0000-0002-1205-8563
Abstract Dimension and ornamental stones used for built heritage are frequently affected, under all climates, by intense weathering induced by the transport of saline solutions. Accordingly, researchers addressed the weathering mechanisms induced by salts (primarily $ Na_{2} $$ SO_{4} $), the stresses generated in the host material, and the durability of ornamental and dimension stones. This study investigates the behaviour of four sedimentary lithotypes, differing in texture and structure (Breccia Aurora, Rosso Verona, and fine- and coarse-grained Vicenza Stone) exposed to a selection of saline solutions, aiming at evaluating their susceptibility to weathering and the influence of petrographic features on durability. The chosen $ Na_{2} $$ SO_{4} $, $ MgSO_{4} $, $ Na_{2} $$ CO_{3} $, NaCl, and $ KNO_{3} $ solutions include the anions characterizing the major saline sources affecting built heritage: capillary rise, acid rain, atmospheric particulate deposition, bird or other animal scat, and de-icing salt contamination. The petrophysical properties of unweathered and salt-weathered samples were characterized by relative mass variation estimation, capillary rise, and hygroscopic absorption-based porosimetry. Scanning Electron Microscopy coupled with microprobe allowed studying the morphological changes triggered by weathering and analysing the chemical composition of the efflorescence crust. The whole of data, consistently with literature, allowed inferring pore type and distribution as the main intrinsic parameters controlling salt weathering susceptibility. Moreover, $ Na_{2} $$ SO_{4} $ and $ Na_{2} $$ CO_{3} $ proved to be the most harmful, probably due to their ability to crystallize in different hydration stages at room temperature. The comparative analysis of the induced weathering can help to choose suitable dimension stones for new buildings or restoration replacements.
An experimental investigation into the salt-weathering susceptibility of building limestones
Scrivano, Simona (author) / Gaggero, Laura (author)
2020
Article (Journal)
Electronic Resource
English
BKL:
38.58
Geomechanik
/
56.20
Ingenieurgeologie, Bodenmechanik
/
38.58$jGeomechanik
/
56.20$jIngenieurgeologie$jBodenmechanik
RVK:
ELIB41
Pore properties of limestones as controls on salt weathering susceptibility: a case study
| British Library Conference Proceedings | 1996
Specific surface area and salt weathering of limestones: a laboratory study
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| British Library Conference Proceedings | 2008
Evaluation of the compatibility of building limestones from salt crystallization experiments
| British Library Conference Proceedings | 2010
Salt weathering in dual-porosity building dolostones
| Elsevier | 2007