Page 44 - SIM Guide to annual assessment_v2.0_Dec 2021

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INSPECTION OF CONCRETE WALLS

Concrete Spalling

INCLUDES:
▪ Mapping the location of defects.
▪ Attention to the depth of the defect, exposure

and corrosion of rebar.
▪ Concrete cover measurement.

GOOD PRACTICE
▪ Remove defected or delaminated concrete

cover and check condition of rebar.
▪ Check the wall surface by tapping with a
hammer to detect delamination or hollow
areas under the concrete cover.

REMARKS
▪ Spalling indicates overload or progressing

corrosion of reinforcing steel bars.
(= structural integrity is compromised).

CATEGORIZATION:

Concrete spalling and exposed rebar LFF= B (Likely) or A (Almost Certain)
Expert Assessments must be triggered

Concrete Carbonation

INCLUDES:
▪ Check for adequate
concrete cover if there
is presence of severe
carbonation signs

REMARKS:
▪ Normally carbonation front reaches a maximum depth of 15-20mm after 20 years of

concrete service (approx.)

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