UFC 4-150-07
19 June 2001
Vibration
Finishing
Curing
Special skills and experience are required for placing shotcrete and for
handling and placing concrete for underwater repairs. Shotcrete, in particular,
requires a skilled nozzle operator to ensure quality results. Use experienced
personnel when using epoxy components, epoxy injection, and sealing cracks
and joints require experienced personnel.
Underwater repairs, depending on the complexity of the job, require
special skills beyond placing the concrete, such as how to remove marine
growth, underwater jetting and blasting, how to use underwater tools for cutting
and drilling, and how to use certain materials for coating and caulking
underwater.
7-2.3
Special Equipment Requirements. Unique equipment requirements
exist on many jobs and often dictate the personnel skill requirements. Applying
shotcrete requires a complete set of special equipment, as does pumped
concrete. See the outlines in concrete placement methods (CPM) CPM-4 and
CPM-6. Also, underwater work can require the same equipment listed in
Paragraph 6.3.4.
Above water repairs require conventional equipment for surface
abrasive blasting and air-jet cleaning, form construction, and mixing, placing, and
finishing concrete.
7-3
METHODS OF PLACING CONCRETE AND MORTARS. The seven
most common methods for the placing concrete and mortars in waterfront repair
are listed and describer in Table 7-2.
Table 7-2 Placement of Concrete and Mortar
No.
Description
CPM-1
Hand Placement
CPM-2
Dry Pack
CPM-3
Cast-in-Place
CPM-4
Shotcrete
CPM-5
Tremie
CPM-6
Pumped
CPM-7
Prepacked
7-7
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