Handbook for Bridge Inspections - TSP2

Example 9.2-11
9.2 CONCRETE ELEMENTS
Cracks on a retaining wall caused by a reaction to
alakali (con finned by structural analysis). De-icing
salt on the pavement is normally not used. The
width of the cracks does not exceed 0.8 mm. The
site is not very accessible, and the public rarely go
there.
Type of damage:
Cracks in Concrete Element
Cause of Damage & Conseq uences:
Cause of Damage:
Alkaline reactive Aggregates
204
2M, IE
25
Procedures:
Surface water should be drained orfand the bridge
deck treated with waterproofing layer. This should
be carri ed out within 5 years.
Example 9.2-12
Cracks in a concrete beam due to bowing. Statical
calculations indicate that there is adequate reinforcement.
Type of damage: 204
Cracks in Concrete Element
Cause of Damage & Consequences: 2M
Cause of Damage: 61
Traffi c Loads
Procedures:
Treatment of the surface within 5 years with a coating
of material designed for covering cracks.
Example 9.2-13
Crack in a wing wall due to subsidence.
Type of damage: 204
Cracks in Concrete Element
Cause of Damage & Consequences: 2M
Cause of Damage: 82
Consequenti al/Secondary Damage
Procedures:
Follow up by taking levell ing measurements. Once
the subsidence has stopped the cracks can be injection
filled.
Handbook for Bridge Inspect ions 157