Corrosion of metal reinforcement in Clay

Brick MasonryWong Hsui Han

Scope of presentation•Introduction•Methodology•Results•Discussion

Scope of presentation•Introduction•Methodology•Results•Discussion

Factors affecting corrosion•Oxygen + Water•Humidity•Temperature•Wind•Wall section•Level of building

Impact of humidity on corrosion(1)

TUUTTI, K., 1982, PG 85

Impact of temperature on corrosion (1)

TUUTTI, K., 1982, PG 85

Impact of wind on corrosion (2)

Layout of wall section

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Scope of presentation•Introduction•Methodology•Results•Discussion

Sites where samples were taken from

Analysing the crack…

Removing samples from the wall…

Marking the samples

Measuring the corrosion depth

Measuring the corrosion depth

Scope of presentation•Introduction•Methodology•Results•Discussion

Results with hand held tools

North versus South facing

Caliper versus Photography

Scope of presentation•Introduction•Methodology•Results•Discussion

Impact of factors on corrosion•Oxygen + Water•Humidity•Temperature•Wind•Wall section•Level of building

Error in measuring corrosion depth

Impact of pitting on the measurement?

Impact of color and shadow on the measurement

Metal reinforcement with or without mortar?

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

Thank you

Results with digital photography

Reference• 1 2