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Monitoring of corrosion protection in reinforced concrete structures using an integrated pH optode

  • Corrosion in steel-reinforced concrete structures is a critical issue. Corrosion appears if the pH value of the concrete matrix decreases due to deterioration of the Calcium hydroxide layer on the Steel surface. The safest Information about potential danger of Steel corrosion is the knowledge of the pH value of concrete. The paper presents a Tiber optic pH sensor for long-term monitoring of the pH value of reinforced concrete structures at risk from corrosion. The sensor probe is small (about 8 mm in diameter), can be embedded into the concrete matrix and observe changes in pH over years. Several sensor probes can be staggered to detect the progression of pH decrease. The pH values can be resolved with 0.1 to 0.2 pH value in the ränge between 12.0 and 9.5. The structure of the pH measurement System, longterm test results and the design to achieve stable probes will be explained. Experienee from test applications of pH sensors embedded in grouted anchors and in concrete components for aCorrosion in steel-reinforced concrete structures is a critical issue. Corrosion appears if the pH value of the concrete matrix decreases due to deterioration of the Calcium hydroxide layer on the Steel surface. The safest Information about potential danger of Steel corrosion is the knowledge of the pH value of concrete. The paper presents a Tiber optic pH sensor for long-term monitoring of the pH value of reinforced concrete structures at risk from corrosion. The sensor probe is small (about 8 mm in diameter), can be embedded into the concrete matrix and observe changes in pH over years. Several sensor probes can be staggered to detect the progression of pH decrease. The pH values can be resolved with 0.1 to 0.2 pH value in the ränge between 12.0 and 9.5. The structure of the pH measurement System, longterm test results and the design to achieve stable probes will be explained. Experienee from test applications of pH sensors embedded in grouted anchors and in concrete components for a cooling tower will be presented.zeige mehrzeige weniger

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Metadaten
Autor*innen:Wolfgang Habel, R. Röben, R. Hüttl, M. Kuchejda
Persönliche Herausgeber*innen:G. A. Ramos
Dokumenttyp:Beitrag zu einem Tagungsband
Veröffentlichungsform:Graue Literatur
Sprache:Englisch
Titel des übergeordneten Werkes (Englisch):SHMII-5 - 5th International conference on structural health monitoring of intelligent infrastructure (Proceedings)
Jahr der Erstveröffentlichung:2011
Verlag:National Autonomous University of Mexico
Verlagsort:Mexico City
Ausgabe/Heft:Session 15, Topic 4.5
Erste Seite:2
Letzte Seite:8
Veranstaltung:SHMII-5 - 5th International conference on structural health monitoring of intelligent infrastructure
Veranstaltungsort:Cancún, Mexico
Beginndatum der Veranstaltung:11.12.2011
Enddatum der Veranstaltung:15.12.2011
Verfügbarkeit des Dokuments:Datei im Netzwerk der BAM verfügbar ("Closed Access")
Datum der Freischaltung:19.02.2016
Referierte Publikation:Nein
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