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Featured Project > Repair System Selection
Repair System Selection:
Although the Navy had considered suspending a heavy fabric from
the underside of the thin shell concrete roof in order to protect
both personnel and helicopters from falling spalls, it was determined
that this was not an optimum solution since it did not prevent additional
deterioration of the concrete structure. Also, the cost of this
suspended fabric would have been nearly two million dollars, which
is about twice the cost of the repair system that the structural
engineers recommended to the Navy. The structural engineers recommended
to the Navy that the selected repair do the following:
| · |
Restore the original structure. |
| · |
Prevent future deterioration for about
twenty-five years. |
| · |
Limit the expenditure of repair funds. |
| · |
Accomplish the repair in three months
so that the Navy could quickly utilize the hanger bays. |
The structural engineers utilizing a repair method that directly
attacked the problem of reinforcing steel corrosion and concrete
spalling/laminations achieved these objectives. This repair/restoration
consisted of the following basic procedures in this sequence:
1. |
Removing spalled concrete by hand methods. |
| 2. |
Applying high strength polymer repair mortar to spalls by
hand methods |
3. |
Applying a penetrating, corrosion inhibiting
impregnation to all exposed concrete surfaces. |
4. |
Applying a protective, anti-carbonation acrylic coating
to all exposed concrete surfaces. |
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