Art. 480.04 Aggregate Shoulders earth compacted, shaped and finished to the lines, grades and cross sections shown on the plans after the surfacing, curb, gutter, or curb and gutter has been constructed.
480.04 Nonrigid Type Surfacing. At locations where shoulders or medians
are constructed adjacent to nonrigid type surfacing such as aggregate base or surface course, or any hot-mix asphalt surface course not constructed on a portland cement concrete base course, the following shall apply.
a.When the Base or Surface Course is constructed in a trench. Before the material for the base or surface course is deposited, earth shall be roughed in for the shoulders. The earth shall be placed so that it will be possible to retain and compact the edges of the base or surface course. After the base or surface course has been constructed, the balance of the earthwork required to complete the shoulders and median shall be performed, and the shoulders and median shall be shaped and trimmed to the lines, grades and cross sections shown on the plans.
b.When the Base or Surface Course is not constructed in a trench. Before the base or surface course is constructed, the earthwork required to complete the shoulders and median shall be shaped and trimmed to the lines, grades and cross sections shown on the plans.
480.05 Basis of Payment. This work will not be measured or paid for
separately. SECTION 481. AGGREGATE SHOULDERS
481.01 Description. This work shall consist of furnishing, placing, shaping,
and compacting aggregate on a prepared subgrade adjacent to the edges of the completed pavement structure or stabilized shoulder.
481.02 Materials. Materials shall be according to the following.
Item Article/Section
a.Coarse Aggregate .............................................................................. 1004.04
b.RAP Material (Note 1) ............................................................................. 1031 Note 1. Reclaimed asphalt pavement (RAP) may be used as aggregate wedge shoulders Type B.
481.03 Equipment. Equipment shall be according to the following.
Item Article/Section
a.Tamping Rollers ................................................................................. 1101.01
b.Pneumatic-Tired Rollers .................................................................... 1101.01
c.Three-Wheel Rollers (Note 1) ............................................................ 1101.01
d.Tandem Rollers (Note 1) ................................................................... 1101.01
e.Vibratory Machine (Note 2)
f.Aggregate Spreaders ......................................................................... 1102.04 Aggregate Shoulders Art. 481.07 Note 1. Three-wheel or tandem rollers shall weigh from 6 to 10 tons (5.5 to 9 metric tons) and not less than 200 lb/in. (35 N/mm) nor more than 325 lb/in. (55 N/mm) of width of roller. Note 2. The vibratory machine shall meet the approval of the Engineer. CONSTRUCTION REQUIREMENTS
481.04 Subgrade Preparation. The subgrade shall be prepared in a manner
approved by the Engineer.
481.05 Moisture Content. Prior to being placed on the subgrade, the
aggregate shall contain sufficient moisture to provide satisfactory compaction. For Type A shoulders, the water and aggregate shall be mixed through a controlled aggregate mixing system. The system shall consist of a mechanical mixing device and aggregate and water measuring devices, meeting the approval of the Engineer. Wetting the aggregate in cars, bins, stockpiles, or trucks will not be permitted.
481.06 Aggregate Shoulders Type A and Type B. The shoulders shall be
constructed in lifts of not more than 6 in. (150 mm) thick when compacted, except that if tests indicate the desired results are being obtained, the compacted thickness of any lift may be increased to a maximum of 8 in. (200 mm). The aggregate shall be placed with a spreader. Each lift of material shall be compacted with a tamping roller, a pneumatic-tired roller, a vibratory machine, or a combination of any of the three, until the compaction has been approved by the Engineer. If the moisture content of the material is not such as to permit satisfactory compaction during the compacting operations, water shall be added in such quantity that satisfactory compaction can be obtained. The top lift shall be given a final rolling with a three-wheel or tandem roller. If any subgrade material is worked into the aggregate during the compacting or finishing operation, all granular material within the affected area shall be removed and replaced with new aggregate. The shoulders shall be constructed to the thicknesses shown on the plans. Thickness determinations shall be made at such points as the Engineer may select. When the constructed thicknesses are less than 90 percent of the thicknesses shown on the plans, aggregate shall be added to obtain the required thicknesses; however, the surface elevation of the completed shoulders shall not exceed by more than 1/8 in. (3 mm) the surface elevation shown on the plans or authorized by the Engineer.
481.07 Aggregate Wedge Shoulders, Type B. Prior to placing the
aggregate wedge shoulder, Type B, the weeds and grass on the area to be covered shall be cut. The aggregate shall be deposited in its final position with a spreader and compacted to the satisfaction of the Engineer. If the moisture content of the aggregate is not such as to permit satisfactory compaction during the rolling Art. 481.08 Hot-Mix Asphalt Shoulders operations, water shall be added in such quantity that satisfactory compaction can be obtained.
481.08 Opening to Traffic. The road shall be open to traffic according to
Article 701 — 07.
481.09 Method of Measurement. This work will be measured for payment in
tons (metric tons), cubic yards (cubic meters), or square yards (square meters) according to Article 311.08, except payment will not be made for aggregate outside the plan width.
481.10 Basis of Payment. This work will be paid for at the contract unit price
per ton (metric ton) or per cubic yard (cubic meter) for AGGREGATE SHOULDERS, TYPE A, or AGGREGATE SHOULDERS, TYPE B; at the contract unit price per ton (metric ton) for AGGREGATE WEDGE SHOULDER, TYPE B; or at the contract unit price per square yard (square meter) for AGGREGATE SHOULDERS, TYPE A, or AGGREGATE SHOULDERS, TYPE B, of the thickness specified. SECTION 482. HOT-MIX ASPHALT SHOULDERS
482.01 Description. This work shall consist of constructing a hot-mix asphalt
(HMA) shoulder on a prepared subgrade, existing paved shoulder, or subbase.
482.02 Materials. Materials shall be according to Section 1030.
482.03 Equipment. The equipment shall be according to Article 406.03.
CONSTRUCTION REQUIREMENTS
482.04 General. For pavement and shoulder resurfacing projects, HMA
binder and surface course mixtures the same as that specified for the mainline pavement may be used in lieu of HMA shoulder mixture for the resurfacing of shoulders, at the option of the Contractor. For the construction of shoulder strips for pavement resurfacing, HMA binder and surface course mixtures the same as that specified for the mainline pavement shall be used. HMA shoulders shall not be placed on frozen or muddy subgrade. Whenever HMA shoulders are constructed adjacent to a pavement constructed on an improved subgrade and additional material is needed to extend the improved subgrade to the bottom of the HMA shoulder, the additional material shall be subbase granular material, Type C, according to Section 311.
482.05 Placing and Compacting. HMA shoulders shall be placed and
compacted according to Article 407.06, except the following.
a.When the shoulder width is 8 ft (2.4 m) or greater, the top lift shall be placed with a spreading and finishing machine.
Referenced in this section
Sections that cite this one
AGGREGATE SHOULDERS in other states
Get an email when 481 changes
Illinois revises spec sections through supplementals and new editions. We check this one every week and email you the day it changes. Free, no account.
Source: Illinois Standard Specifications for Road and Bridge Construction, 2022 Edition. Pages 309–311 of 1,217. View official source ↗