Handbook for Bridge Inspections - TSP2

9.2 CONCRETE ELEMENTS
Example 9.2-8
Cracks on the deck of a suspension bridge caused
by blocked joints. A total collapse is not anticipated.
Refer to Chapter 9.8 for joints.
Type of damage: 204
Cracks in Concrete Element
Cause of Damage & Consequences: 3C
Cause of Damage: 44
Inadequate Maintenance
Procedures:
Chi selling out the concrete; casting ornew cross
beams; installation of tight joints. To be carried oul
within one year.
Example 9.2-9
Cracks under a bearing whi ch has been sited too
near the edge.
Type of damage: 204
Cracks in Concrete Element
Cause of Damage & Consequences: 4C
Cause of Damage: 13
Poor Design Solutions
Procedures:
Reli eve pressure on the bearing immediately;
strengthening the bearing shelfwithin a year.
Example 9.2·10
Cracks on a pier caused by a reaction to alkali. The
cracks arc up to I mm wide and located in a aggres·
sive environment.
Type of damage: 204
Cracks in Concrete Element
Cause of Damage & Consequences: 3M
Cause of Damage: 25
A Ikaline reactive Aggregates
Procedures:
Joints above the pi er should be sealed \ ... ·ithin 2
years in order to reduce water leakages down on the
pIer.
156 Handbook for Bridge Inspect ions