Investigation on the corrosion of metal reinforcement in clay brick masonry
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Transcript of Investigation on the corrosion of metal reinforcement in clay brick masonry
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Corrosion of metal reinforcement in Clay
Brick MasonryWong Hsui Han
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Scope of presentation•Introduction•Methodology•Results•Discussion
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Scope of presentation•Introduction•Methodology•Results•Discussion
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Factors affecting corrosion•Oxygen + Water•Humidity•Temperature•Wind•Wall section•Level of building
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Impact of humidity on corrosion(1)
TUUTTI, K., 1982, PG 85
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Impact of temperature on corrosion (1)
TUUTTI, K., 1982, PG 85
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Impact of wind on corrosion (2)
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Layout of wall section
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Scope of presentation•Introduction•Methodology•Results•Discussion
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Sites where samples were taken from
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Analysing the crack…
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Removing samples from the wall…
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Marking the samples
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Measuring the corrosion depth
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Measuring the corrosion depth
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Scope of presentation•Introduction•Methodology•Results•Discussion
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Results with hand held tools
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North versus South facing
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Caliper versus Photography
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Scope of presentation•Introduction•Methodology•Results•Discussion
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Impact of factors on corrosion•Oxygen + Water•Humidity•Temperature•Wind•Wall section•Level of building
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Error in measuring corrosion depth
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Impact of pitting on the measurement?
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Impact of color and shadow on the measurement
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Metal reinforcement with or without mortar?
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Summary•Many factors affect corrosion depth•External more at risk than internal•Reinforcement in the middle of the building more at risk•Wind direction impacts
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Thank you
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Results with digital photography
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Reference• 1 2