ITEM 617 RECONDITIONING SHOULDERS
617.01
Description
617.02
Materials
617.03
Prosecution
617.04 Shoulder
Preparation
617.05
Furnishing and Compacting Additional Aggregate
617.06 Method
of Measurement
617.07 Basis of
Payment
617.01 Description. This work consists of
preparing the shoulder, and furnishing and compacting additional aggregate on
the existing or prepared shoulder.
Use
removed or excavated materials in the Work when the material conforms to the
specifications; if not, then recycle or dispose of the material according to 105.16 and 105.17.
617.02 Materials. Furnish materials conforming to 703.18.
617.03 Prosecution. If reconditioning
shoulders as part of a resurfacing project and traffic is maintained, place
shoulder material along with the paving operations as rapidly as
possible. Complete all shoulder reconditioning within four days following
the placement of the surface course or any course that results in a drop-off of
2.0 inches (50 mm) or greater.
617.04 Shoulder Preparation. If
shoulder preparation is specified, loosen the existing surface to a depth of 1
to 2 inches (25 to 50 mm). If the surface is an asphalt mix or seal, cut
the surface along the edge of the pavement with a blade or disc to give a
straight vertical edge. Reduce pieces of loosened material that exceed
approximately 1 1/2 inches (38 mm) in size to at least this maximum size or
consider these pieces unsuitable material. Remove and dispose of
oversized or other unsuitable material that would interfere with placing of
aggregate. Reshape the loosened material as necessary to conform to the
requirements for placing aggregate.
617.05 Furnishing and Compacting Additional Aggregate. Spread
aggregate with approved spreaders. Do not dump or store aggregate on the
pavement. Remove spilled aggregate from the pavement as spreading
progresses.
Where
the shoulder is relatively level, compact the material using crawler-type
tractors, tamping rollers, trench rollers, suitable pneumatic tire rollers, or
other suitable equipment. Use a minimum of four passes with compaction
equipment weighing at least 6 tons (5 metric tons). Perform the final
compaction of the surface of the shoulder using a pneumatic tire roller. Where it would be unsafe to use the above compaction equipment due
to the grade or width of the shoulder, use a side-mounted roller or
side-mounted vibrating plate compactor that is securely attached to a tractor
or other construction equipment. The side-mounted roller or side-mounted
vibrating plate compactor must be able to adequately compact the aggregate
while the equipment to which it is mounted remains on the paved surface. Use a
minimum of four passes with the side-mounted roller and two passes with the
side-mounted vibrating plate compactor. Compact the aggregate immediately after
the spreading operation to prevent the loss of contained moisture and
displacement of the material.
Apply
water as directed by the Engineer when required to aid compaction and to
prevent segregation of the material.
617.06 Method of Measurement. The
Department will measure Shoulder Preparation by the number of square yards
(square meters).
The
Department will measure Compacted Aggregate, by the number of cubic yards
(cubic meters) in place computed from the profile grade and typical sections.
The
Department will measure Water by the number of M gallons or 1000 gallon units
(cubic meters) according to 616.03.
If
the plans provide for the use of aggregate in a variable width or depth course
and the Department cannot readily calculate the quantity from profile grade and
typical sections, the Department will measure the cubic yards (cubic meters) by
converting from weight using the following conversion factors:
Material |
Conversion Factor |
|
Crushed stone |
3800 lb/yd3 |
2250 kg/m3 |
Crushed gravel |
3900 lb/yd3 |
2310 kg/m3 |
Crushed slag [1] |
|
|
less than 90 lb/ft3
(1450 kg/m3) |
3600 lb/yd3 |
2140 kg/m3 |
90 to 100 lb/ft3
(1450 to 1600 kg/m3) |
4000 lb/yd3 |
2375 kg/m3 |
more than 100 lb/ft3
(1600 kg/m3) |
4500 lb/yd3 |
2670 kg/m3 |
Recycled Portland Cement Concrete |
3400 lb/yd3 |
2020 kg/m3 |
Recycled Asphalt Concrete Pavement |
4000 lb/yd3 |
2375 kg/m3 |
[1] Based on average dry rodded weight of standard sizes of slag aggregates on
record at the Laboratory. The conversion factors listed are the long
gradation weights. These numbers are based on the dry rodded weights of No. 67, 57, or 8 gradation.
The Department will determine slag weights based on weights obtained from the
original source. |
The
Department will classify salvaged or mixed materials according to the material
that makes up the majority of the mixture.
The
moistures of the delivered material will be less than 2 percent above saturated
surface dry condition or the payment will be based on the dry densities and dry
weights.
Furnish
freight bills or certified weigh bills according to Item 109.
617.07 Basis of Payment. The
Department will pay for accepted quantities at the contract prices as follows:
Item
Unit
Description
617
Square
Yard
Shoulder Preparation
(Square Meter)
617
Cubic
Yard
Compacted Aggregate
(Cubic
Meter)
617
M Gallons
Water
(Cubic Meter)