3-5 Water and/or fines added to material to aid compaction and sta bilization to prevent raveling and rutting shall be incidental to the work. The quantity for payment of base and subbase placed on rock su bgrade shall include only that material placed above the normal subgrade line. Furnishing and placing base and sub base backfill material betw een the rock and the normal subgrade line will not be paid for directly but shall be considered incidental to the work. Payment will be made under: P a y I t e m P a y U n i t
304.10 Aggregate Subbase Course-Gravel C u b i c Y a r d
304.103 Aggregate Subbase Course-Gravel, Truck Measure Cubic Yard 304.104 Aggregate Subbase Course-Gravel, Plan Quantity Cubic Yard
304.14 Aggregate Base Course - Type A Cubic Yard
304.15 Aggregate Base Course - Type B Cubic Yard
304.16 Aggregate Base Course - Type C Cubic Yard
SECTION 306 - RECLAIMED MATERIAL FOR STABILIZED BASE Reserved SECTION 307 FULL DEPTH RECYCLING (UNTREATED OR TREATED WITH EMULSIFIED ASPHALT STABILIZER)
307.01 Description This work shall consist of pulverizing a po rtion of the existing
roadway structure into a homogenous mass, adding an emulsified asphalt stabilizer (if required) to the depth of the pulve rized material specified in the contract, placing and compacting this material to the lines, grades, and dimensions s hown on the plans or established by the Resident. MATERIALS
307.02 Pulverized Material Pulverized material shall consist o f the existing asphalt
pavement layers and one inch or more as specified of the underl ying gravel, pulverized and blended into a homogenous mass. Pulverized material will be pr ocessed to 100% passing a 2 inch square mesh sieve. 307.021 New Aggregate and Additional Recycled Material New agg regate, if required by the contract, shall meet the requirements of Subsection 703. 10 - Aggregate for Untreated Surface Course and Leveling Course, Type A. Aggregate Subbase C ourse Gravel Type D processed to 100 percent passing a 2 inch square mesh sieve and meeting the requirements 3-6 of 703.06 – Aggregate for Base and Subbase may be used in areas requiring depths greater than 2 inches. New aggregate, will be measured and paid for und er the appropriate item. Recycled material, if required, shall consist of salvaged aspha lt material from the project or from off-site stockpiles that has been processed before use to 100 percent passing a 2 inch square mesh sieve. Recycled material shall be conditionally ac cepted at the source by the Resident. It shall be free of winter sand, granular fill, cons truction debris, or other materials not generally considered asphalt pavement. Recycled material generated and salvaged from the project shall be used within the roadway limits to the extent it is available as described in 30 7.09. No additional payment will be made for material salvaged from the project. Recycled material supplied from off-site stockpiles shall be p aid for as described in the contract, or by contract modification. 307.022 Emulsified Asphalt Stabilizer. If required, the emulsi fied asphalt stabilizer shall be grade MS-2, MS-4, SS- 1, or CSS-1 meeting the requireme nts of Subsection 702.04 Emulsified Asphalt. 307.023 Water Water shall be clean and free from deleterious concentrations of acids, alkalis, salts or other organic or chemical substances. 307.024 Portland Cement If required, Portland Cement shall be T ype I or II meeting the requirements of AASHTO M85. 307.025 Hydrated Lime If required, Hydrated Lime shall meet the requirements of AASHTO M216. EQUIPMENT
307.03 Pulverizer The pulverizer shall be a self-propelled mac hine, specifically
manufactured for full-depth recycling work and capable of reduc ing the required existing materials to a size that will pass a 2 inch square mesh sieve. The machine shall be equipped with standard automatic depth controls and must maintain a cons istent cutting depth and width. The machine also shall be equipped with a gauge to show depth of material being processed.
307.04 Liquid Mixer Unit or Distr ibutor. If treatment of the r ecycled layer with
emulsified asphalt is required by the contract, a liquid mixing unit or distributor shall be used to introduce the emulsified asphalt stabilizer into the pu lverized material. The mixing unit shall contain a liquid distribution and mixing system whic h has been specifically manufactured for full-depth recycling work, capable of mixing t he pulverized material with an evenly metered distribution of emulsified asphalt into a hom ogeneous mixture, to the depth and width required.