Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Prognosis of internal expansive reactions in concrete structures
In the last decade, a significant number of problems related to concrete deterioration have been detected in concrete civil infrastructures in Portugal; the leading cause being internal expansive reactions (IER), more specifically, alkali-silica reaction (ASR) and internal sulphatic reaction (ISR). The reasoning behind the detection of an increasing number of affected structures is threefold, greater awareness of the technical and scientific community regarding IER and their consequences on large concrete structures, improvement of the methods utilized in IER diagnosis, and the fact that IER distress signs only appear several years or decades after construction. In addition to a correct diagnosis, the quantification of the current concrete condition and the evaluation of the potential for future deterioration still existing in the affected concrete structure (prognosis) are also of upmost importance, so that the risks to structural integrity and need for mitigation/remediation actions can be properly assessed. This communication briefly presents a recent study carried out at LNEC of an IER affected concrete structure and the methodology used to make a prognosis on the condition of the deteriorated structure. ; The authors wish to acknowledge the Fundação para a Ciência e Tecnologia (FCT) for the financial support under project IMPROVE (PTDC/ECM/115486/2009) and project DURATINET for Transnational Programme of Atlantic Area 2007-2013, co-financed by FEDER. ; 7 ; 14p ; DM/NMM ; 2012 ; 31 de maio a 1 de junho
Prognosis of internal expansive reactions in concrete structures
In the last decade, a significant number of problems related to concrete deterioration have been detected in concrete civil infrastructures in Portugal; the leading cause being internal expansive reactions (IER), more specifically, alkali-silica reaction (ASR) and internal sulphatic reaction (ISR). The reasoning behind the detection of an increasing number of affected structures is threefold, greater awareness of the technical and scientific community regarding IER and their consequences on large concrete structures, improvement of the methods utilized in IER diagnosis, and the fact that IER distress signs only appear several years or decades after construction. In addition to a correct diagnosis, the quantification of the current concrete condition and the evaluation of the potential for future deterioration still existing in the affected concrete structure (prognosis) are also of upmost importance, so that the risks to structural integrity and need for mitigation/remediation actions can be properly assessed. This communication briefly presents a recent study carried out at LNEC of an IER affected concrete structure and the methodology used to make a prognosis on the condition of the deteriorated structure. ; The authors wish to acknowledge the Fundação para a Ciência e Tecnologia (FCT) for the financial support under project IMPROVE (PTDC/ECM/115486/2009) and project DURATINET for Transnational Programme of Atlantic Area 2007-2013, co-financed by FEDER. ; 7 ; 14p ; DM/NMM ; 2012 ; 31 de maio a 1 de junho
Prognosis of internal expansive reactions in concrete structures
Santos Silva, A. (Autor:in) / Custódio, J. (Autor:in) / Soares, D. (Autor:in) / Ribeiro, A. C. (Autor:in)
01.05.2012
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
DDC:
690
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