TM 5-822-10/AFM 88-6, Chap. 6
5-5.
Equipment.
In general, equipment and procedures to handle the crushed portland cement concrete are the same as those for typical
aggregates. However, equipment and procedures used to break up, crush, and process existing portland cement concrete
for reuse as construction aggregates are unique to the recycling process and, therefore, will be described. Since the major
source of recycled concrete is old rigid pavement, most of the pieces of equipment are involved with this operation. Even
the equipment used in the recycling process is the type that can be considered standard in heavy construction.
a. Breakup equipment. Equipment that has been used successfully to break up existing portland cement concrete
pavement includes the following:
(1) Diesel pile-driving hammer mounted on a motor grader that punctures the pavement on a 1- to 2-foot grid
pattern (fig 5-2).
(2) Concrete pavement breakers of various types.
(3) Rhino-horn-tooth-ripper-equipped hydraulic excavator frequently employed to dislodge and expose the
reinforcing steel after the pavement has been fractured by one of the pieces of equipment described in (1) and (2) above
(fig 5-3). The exposed steel is then cut manually with a cutting torch or shears.
Figure 5-2. Diesel pile-driving hammer puncturing the old pavement.
Figure 5-3. Rhino-horn-tooth-ripper-equipped hydraulic excavator.
5-2
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