Computerised prediction of the deterioration of concrete building facades caused by moisture and changes in temperature

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dc.contributor Aalto-yliopisto fi
dc.contributor Aalto University en
dc.contributor.advisor Sistonen, Esko, Prof., Aalto University, Finland
dc.contributor.author Al-Neshawy, Fahim
dc.date.accessioned 2013-05-27T09:00:14Z
dc.date.available 2013-05-27T09:00:14Z
dc.date.issued 2013
dc.identifier.isbn 978-952-60-5203-8 (electronic)
dc.identifier.isbn 978-952-60-5202-1 (printed)
dc.identifier.issn 1799-4942 (electronic)
dc.identifier.issn 1799-4934 (printed)
dc.identifier.issn 1799-4934 (ISSN-L)
dc.identifier.uri https://aaltodoc.aalto.fi/handle/123456789/10225
dc.description.abstract Environmental conditions, mainly temperature and relative humidity, are the major factors in the physical, chemical, and biological deterioration of concrete building facades. The purpose of this thesis is to investigate the effect of the environmental conditions on the deterioration of concrete building facades, develop a system for monitoring these conditions, and predict the deterioration and remaining service life of these facades on the basis of the monitoring data. The thesis consists of a literature review, laboratory and field investigation, the development of a hygrothermal monitoring and deterioration predicting system, and its application to concrete building facades. The literature review covered the concrete deterioration caused by moisture and changes in temperature. Special attention was given to the corrosion of steel reinforcement as a result of carbonation, damage caused by repeated freezing and thawing, and mould growth. The laboratory investigation and field monitoring of relative humidity and temperature were carried out to assess the impact of environmental factors on the performance of the structure under concern. The laboratory and field measurement data were used to validate the concrete deterioration prediction models. The results confirm that the hygrothermal field monitoring is significant for: (i) collecting real relative humidity and temperature data within the concrete facades and the surrounding environmental conditions; (ii) integrating the effects of the measured data into different indicators for calculating the potential for deterioration, and (iii) working as an early warning alarm to ensure appropriate renovation and maintenance measures by comparing the predicted deterioration levels with different threshold values of deterioration indicators. Based on the monitoring data, the environmental factors that affect the deterioration of concrete building facades are characterized. The result of the research will improve the building construction industry by providing methodologies and systems for monitoring and predicting the performance of structures. A scientific relevance of this research will be the improved understanding between the results received in laboratory studies and observations of deterioration in practice. The implementation of the RHT-MAPS monitoring system developed can be carried out cost-effectively in comparison to the construction and maintenance expenses of concrete facades. The maintenance costs can also be optimized by the monitoring results. en
dc.format.extent 189 + app. 37
dc.format.mimetype application/pdf
dc.language.iso en en
dc.publisher Aalto University en
dc.publisher Aalto-yliopisto fi
dc.relation.ispartofseries Aalto University publication series DOCTORAL DISSERTATIONS en
dc.relation.ispartofseries 96/2013
dc.subject.other Civil engineering en
dc.title Computerised prediction of the deterioration of concrete building facades caused by moisture and changes in temperature en
dc.type G4 Monografiaväitöskirja fi
dc.contributor.school Insinööritieteiden korkeakoulu fi
dc.contributor.school School of Engineering en
dc.contributor.department Rakennustekniikan laitos fi
dc.contributor.department Department of Civil and Structural Engineering en
dc.subject.keyword concrete building facades en
dc.subject.keyword deterioration en
dc.subject.keyword relative humidity en
dc.subject.keyword temperature en
dc.subject.keyword monitoring en
dc.subject.keyword ICT technology en
dc.identifier.urn URN:ISBN:978-952-60-5203-8
dc.type.dcmitype text en
dc.type.ontasot Doctoral dissertation (monograph) en
dc.type.ontasot Väitöskirja (monografia) fi
dc.contributor.supervisor Puttonen, Jari, Prof., Aalto University, Finland
dc.opn Papadakis, Vagelis G., Prof., University of Ioannina, Greece
dc.rev Ansell, Anders, Prof., KTH Royal Institute of Technology, Sweden
dc.rev Elfgren, Lennart, Prof. Emeritus, Luleå University of Technology, Sweden
dc.date.defence 2013-06-07


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