Lime Stabilized Soil Mixture Art. 350.03
b.Portland Cement Concrete Pavement. When portland cement concrete pavement is to be constructed, the deficient thickness may be corrected by increasing the thickness of the pavement. This method of correction will not be allowed for continuously reinforced concrete pavement. The surface elevation of the completed stabilized subbase shall not exceed by more than 3/16 in. (5 mm) the surface elevation shown on the plans or authorized by the Engineer.
312.15 Method of Measurement. This work will be measured for payment as
follows.
a.Contract Quantities. The requirements for the use of Contract Quantities shall conform to Article 202.07(a).
b.Measured Quantities. This work will be measured for payment in place and the area computed in square yards (square meters). The width measured will be at the top of the final lift of the completed work as shown on the plans or as directed by the Engineer.
312.16 Basis of Payment. When the Contractor has the option of which
material type to use, this work will be paid for at the contract unit price per square yard (square meter) for STABILIZED SUBBASE of the thickness specified. When the Department requires a specific material type be used, this work will be paid for at the contract unit price per square yard (square meter) for STABILIZED SUBBASE – HMA or STABILIZED SUBBASE – CAM II of the thickness specified. BASE COURSE SECTION 350. LIME STABILIZED SOIL MIXTURE
350.01 Description. This work shall consist of the construction of a lime
stabilized soil mixture composed of soil, lime, and water which shall be considered as base course. This work shall be according to Section 310, except the lime stabilized soil mixture shall provide a minimum laboratory average compressive strength of 150 psi (1030 kPa), according to AASHTO T 208.
350.02 Method of Measurement. This work will be measured for payment
according to Article 310.14.
350.03 Basis of Payment. This work will be paid for according to
Article 310 — 15.
Art. 351.01 Aggregate Base Course SECTION 351. AGGREGATE BASE COURSE
351.01 Description. The base course shall consist of furnishing one or more
courses of aggregate on a prepared subgrade or subbase.
351.02 Materials. Materials shall be according to the following.
Item Article/Section
a.Coarse Aggregate .............................................................................. 1004.04
351.03 Equipment. Equipment shall be according to the following.
Item Article/Section
a.Tamping Rollers ................................................................................. 1101.01
b.Pneumatic-Tired Rollers .................................................................... 1101.01
c.Steel Wheel Rollers (Note 1) ......................................................... 1101.01(e)
d.Aggregate Spreaders ......................................................................... 1102.04
e.Vibratory Machine (Note 2) Note 1. Three-wheel or tandem rollers shall weigh from 6 to 10 tons (5.5 to 9 metric tons) and shall weigh not less than 200 lb/in. (35 N/mm) nor more than 325 lb/in. (57 N/mm) of width of the roller. Note 2. The vibratory machine shall meet the approval of the Engineer. CONSTRUCTION REQUIREMENTS
351.04 Subgrade. The subgrade shall be prepared according to Section 301,
351.05 Base Course. The aggregate shall be uniform in gradation. Wetting
the aggregate in cars, bins, stockpiles, or trucks will not be permitted. The base course shall be constructed in lifts not more than 4 in. (100 mm) thick when compacted, except that if tests indicate that 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 deposited full-lane width, directly on the prepared subgrade or on the preceding lift of compacted aggregate with a spreader. When placed, it shall be free from segregation and shall require minimum blading or manipulation. Immediately after the material has been placed, it shall be compacted with a tamping roller, or with a pneumatic-tired roller, or with a vibratory machine, or with a combination of any of the three. The top lift shall be given a final rolling with a steel wheel roller. The manner of compaction shall be approved by the Engineer. If any subgrade material is worked into the base material during the compacting or finishing operations, all granular material within the affected area shall be removed and replaced with new aggregate. The Engineer may restrict hauling over the completed or partially completed work after inclement weather or at any time when the subgrade is soft and there is a tendency for the subgrade material to work into the base material.
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Source: Illinois Standard Specifications for Road and Bridge Construction, 2022 Edition. Pages 178–179 of 1,217. View official source ↗