159 weight of the equipment that will place the next layer or pavement. The compacted base is to be porous so that w ater will drain through it. The base is not to be compacted to the point that it is not free draining or that the aggregate is crushed.
311.11 Curing :
No curing is required for Portland cement stabilized based.
311.12 Tolerance :
Thickness tolerance shall meet the requirements of 307.6.2.
311.13 Maintenance :
The Cont ractor shall maintain the base course porous and free from being contaminated or clogged by deleterious material, transported and deposited by construction equipment, traffic, etc., until the next layer of the pavement is placed. The Contractor shall also maintain the final surface of the base course true to specified line, grade and cross section until such time that the pavement is placed.
311.14 Method of Measurement :
The quantity of work done will be the number of cubic yards measured in place. Any additional work beyond the scope of the original plans but authorized by the Engineer will be measured in place and paid at the unit bid price, subject to the provisions of 104 .2 and 109.2. Base course constructed outside the lines, dimensions and cross sections shown on the Plans or designated will not be measured for payment.
311.15 Basis of Payment :
The quantity, determined as provided above, will be paid for at the contract unit price bid for the item below, which price and payment shall constitute full compensation for furnishing all the materials and doing all the work prescribed in a workmanlike and a cceptable manner, including labor, tools, equipment, supplies, and incidentals necessary to complete the work.
311.16 Pay Item :
ITEM DESCRIPTION UNIT 311006 -* Open Graded Free Draining Base Course Cubic Yard * Sequence number
Division 400
ASPHALT PAVEMENTS SECTION 401 ASPHALT BASE, WEARING, AND PATCHING AND LEVELING COURSES 401.1 -DESCRIPTION : This work shall consist of constructing one or more courses of asphalt concrete, mixed mechanically in a plant, composed of aggregate and asphalt material designed in accordance with either the Marshall or Superpave design system as specified in the contract documents, on a prepared foundation in accordance with these specifications and in r easonable close conformity with the lines, grades, weights or thicknesses, and cross sections shown on the Plans or established by the Engineer. The unit of measurement for asphalt concrete will be by the ton, square yard or cubic yard. The work will be accepted in accordance with these Specifications and the applicable requirements of Sections 105, 106, and 109. 401.2 -MATERIALS : The materials shall conform to the following requirements: MATERIAL SUBSECTION Coarse Aggregate 703.1 thru 703.3 Note 1 & Note 2 (See MP 401.02.28 for exceptions and additions required for Superpave Items.) Fine Aggregate 702.3 (See MP 401.02.28 for additions required for Superpave Items) Mineral Filler 702.4 Performance Graded Binders 705.5 Note 1 The total shale, coal and other lightweight deleterious material and friable particles shall not exceed 3%. Note 2 When slag is specified in the contract, the coarse aggregate shall be slag which meets the requirements of 703.3, except as amended in this subsection. 401.2.1 –Performance Graded Binder Grade: The standard grade for Performance Graded (PG) binders shall be PG 64S -22, any deviation will be noted in the contract documents. PG 64H -22 shall be used on projects specified with over 20 million ESALs over the design life. PG 64S -22 binder may be used in asphalt placed below the top two lifts in any pavement section, scratch course and patching -and-leveling are not ide ntified as lifts. CONSTRUCTION METHODS 401.3 -GENERAL : Construction methods to be used in performing the work shall be submitted to the Engineer for review prior to the start of work. This review may require modification of the proposed methods to provide the desired end product. All equipment, tools, machinery, and plant shall be maintained in a satisfactory working condition.