Design and Durability Assessment of Restoring Mortar for Concrete Heritage
Interventions in concrete heritage deal with challenges related to conservation, and must be performed from an integrated restoration perspective. In addition to the material technical performance, the aesthetic compatibility between the repair and the structure, in terms of colour and texture, need...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2021-08-01
|
| Series: | Materials |
| Subjects: | |
| Online Access: | https://www.mdpi.com/1996-1944/14/16/4508 |
| _version_ | 1797523161671008256 |
|---|---|
| author | Judite Miranda Hugo Costa Jónatas Valença Ricardo do Carmo Eduardo Júlio |
| author_facet | Judite Miranda Hugo Costa Jónatas Valença Ricardo do Carmo Eduardo Júlio |
| author_sort | Judite Miranda |
| collection | DOAJ |
| description | Interventions in concrete heritage deal with challenges related to conservation, and must be performed from an integrated restoration perspective. In addition to the material technical performance, the aesthetic compatibility between the repair and the structure, in terms of colour and texture, needs to be ensured. Therefore, the characterisation of the restoration mortar concerning colour match and aging, and the mechanical and durability performances, is essential. In this article, the long-term behaviour of restoration mortar, previously designed and produced by the addition of pigments to white and grey cement-based reference mortar, is evaluated. The durability properties, colour change due to aging, and service life are estimated and analysed. An experimental program is performed to characterise the following properties: (i) water capillary absorption; (ii) accelerated carbonation; (iii) migration of chloride ions; (iv) electrical resistivity; and (v) shrinkage. The colour evolution, when exposed to carbonation, is measured through image processing. The obtained results allow the establishment of a correlation between durability and design parameters. Finally, service life considering deterioration due to steel corrosion is estimated, considering the carbonation resistance and the chloride diffusion values. It is concluded that the W/C ratio influences not only most of the characterised parameters, but also the type and content of the pigment. Furthermore, no colour variation due to carbonation is detected. |
| first_indexed | 2024-03-10T08:39:28Z |
| format | Article |
| id | doaj.art-cdb88d6bf9fa4a5bafb9c9af29fe0081 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-10T08:39:28Z |
| publishDate | 2021-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-cdb88d6bf9fa4a5bafb9c9af29fe00812023-11-22T08:28:33ZengMDPI AGMaterials1996-19442021-08-011416450810.3390/ma14164508Design and Durability Assessment of Restoring Mortar for Concrete HeritageJudite Miranda0Hugo Costa1Jónatas Valença2Ricardo do Carmo3Eduardo Júlio4CERIS—Civil Engineering Research and Innovation for Sustainability, 1049-001 Lisbon, PortugalCERIS—Civil Engineering Research and Innovation for Sustainability, 1049-001 Lisbon, PortugalCERIS—Civil Engineering Research and Innovation for Sustainability, 1049-001 Lisbon, PortugalCERIS—Civil Engineering Research and Innovation for Sustainability, 1049-001 Lisbon, PortugalCERIS—Civil Engineering Research and Innovation for Sustainability, 1049-001 Lisbon, PortugalInterventions in concrete heritage deal with challenges related to conservation, and must be performed from an integrated restoration perspective. In addition to the material technical performance, the aesthetic compatibility between the repair and the structure, in terms of colour and texture, needs to be ensured. Therefore, the characterisation of the restoration mortar concerning colour match and aging, and the mechanical and durability performances, is essential. In this article, the long-term behaviour of restoration mortar, previously designed and produced by the addition of pigments to white and grey cement-based reference mortar, is evaluated. The durability properties, colour change due to aging, and service life are estimated and analysed. An experimental program is performed to characterise the following properties: (i) water capillary absorption; (ii) accelerated carbonation; (iii) migration of chloride ions; (iv) electrical resistivity; and (v) shrinkage. The colour evolution, when exposed to carbonation, is measured through image processing. The obtained results allow the establishment of a correlation between durability and design parameters. Finally, service life considering deterioration due to steel corrosion is estimated, considering the carbonation resistance and the chloride diffusion values. It is concluded that the W/C ratio influences not only most of the characterised parameters, but also the type and content of the pigment. Furthermore, no colour variation due to carbonation is detected.https://www.mdpi.com/1996-1944/14/16/4508concrete heritagerestoration mortarcolourtextureperformancedurability |
| spellingShingle | Judite Miranda Hugo Costa Jónatas Valença Ricardo do Carmo Eduardo Júlio Design and Durability Assessment of Restoring Mortar for Concrete Heritage Materials concrete heritage restoration mortar colour texture performance durability |
| title | Design and Durability Assessment of Restoring Mortar for Concrete Heritage |
| title_full | Design and Durability Assessment of Restoring Mortar for Concrete Heritage |
| title_fullStr | Design and Durability Assessment of Restoring Mortar for Concrete Heritage |
| title_full_unstemmed | Design and Durability Assessment of Restoring Mortar for Concrete Heritage |
| title_short | Design and Durability Assessment of Restoring Mortar for Concrete Heritage |
| title_sort | design and durability assessment of restoring mortar for concrete heritage |
| topic | concrete heritage restoration mortar colour texture performance durability |
| url | https://www.mdpi.com/1996-1944/14/16/4508 |
| work_keys_str_mv | AT juditemiranda designanddurabilityassessmentofrestoringmortarforconcreteheritage AT hugocosta designanddurabilityassessmentofrestoringmortarforconcreteheritage AT jonatasvalenca designanddurabilityassessmentofrestoringmortarforconcreteheritage AT ricardodocarmo designanddurabilityassessmentofrestoringmortarforconcreteheritage AT eduardojulio designanddurabilityassessmentofrestoringmortarforconcreteheritage |