4-1 DIVISIO N 400 SURFAC E COURSE S AND PAVEMENT SECTION 401 – AGGREGATE SURFACE COURSE
401.01 DESCRIPTION . This work shall consist of furnishing and placing a wearing course of approved
aggregate on a prepared surface.
401.02 MATERIALS . Materials shall meet the requirements of the following subsections:
Aggregate Surface Course ................................ ................................ ......................... 704.12(a) Aggregate Surface Cou rse, Paths and Trails ................................ .............................. 704.12( b)
401.03 PLACEMENT . The aggregate shall be placed and properly shaped using equipment that allows
the typical cross -section and design grade to be attained. Should aggregate segregation occur, the Contractor shall remove and replace the segregated material or manipulate it until uniform gradation is obtained. The minimum layer thickness for placement of any aggregate surface material shall be 2 inches after compaction, and the maximum layer thickness shall be 8 inches after co mpaction. All layers shall be placed and compacted at approximately equal thickness. In the placement of layers, all joints shall be staggered at least 12 inches. After each layer of surface material is placed, it shall be thoroughly compacted to a uniform density of not less than 95% of the maximum dry density as determined by AASHTO T 99, Method C , or to the satisfaction of the Engineer . Suitable and effective equipment, meeting the approval of the Engineer, shall be used to obtain a true and even surface during compaction. All holes or depressions found during the compacting shall be filled with additional material, reworked, and compacted. If required, water shall be uniformly applied over the aggregate material during compaction in an amount necessary t o produce proper consolidation. The aggregate shall be thoroughly compacted by an approved power roller with a minimum weight of 8 tons, by an approved rubber -tired roller, or by other approved methods. 4-2 401.04 METHOD OF MEASUREMENT . The quantity of Aggregate Surface Course and Aggregate Surface Course, Paths and Trails to be measured for payment will be the number of cubic yards used in the complete and accepted work, as determined by the Plan dimensions of the compacted material or as ordered by the Engineer. No allowance will be made for material placed to a depth greater than that shown on the Plans unless ordered by the Engineer.
401.05 BASIS OF PAYMENT . The accepted quantity of Aggregate Surface Cou rse and Aggregate
Surface Course, Paths and Trails will be paid for at the Contract unit price per cubic yard. Payment will be full compensation for performing the work specified and for furnishing all materials, labor, tools, equipment, and incidentals ne cessary to complete the work. Water used for obtaining the required compaction will not be paid for separately but will be considered incidental to the applicable item. Payment will be made under: Pay Item Pay Unit 401.1000 Aggregate Surface Cour se ................................ ................................ ........ Cubic Yard 401.1500 Aggregate Surface Course, Paths and Trails ................................ ............. Cubic Yard 4-3 SECTIO N 402 – AGGREGAT E SHOULDERS 402.0 1 DESCRIPTION . This work shall consist of furnishing, placing, and compacting material for aggregate shoulders on a prepared surface. 402.0 2 MATERIALS . Materials shall meet the requirements of the following subsection s: Aggregate Shoulders ................................ ................................ ................................ ..704.12 (c) Aggregate Shoulders, RAP ................................ ................................ ........................ 704.12(d) 402.0 3 PLACEMENT . Aggregate shoulders shall be placed with equipment capable of placing the material in accordance with th e Plans . The Contractor shall demonstrate the proposed placement procedures to the Engineer . If deemed necessary by the Engineer, the procedures shall be adjusted to avoid damage to the wearing course . It shall be the Contractor’s responsibility to repair any damage to the wearing course to the satisfaction of the Engineer, at no additional cost to the Agency. Unless otherwise directed by the Engineer or shown on the Plans, aggregate shoulders shall be p laced in one course and shall not be placed until the adjacent wearing course has been completed . The maximum layer thickness for placement of material shall be 8 inches after compaction . When multiple layers are required, all layers shall be placed in app roximately equal thicknesses and compacted as directed by the Engineer . The Contractor shall correct any segregated material , to the satisfaction of the Engineer, at no additional cost to the Agency. All material shall have a true and even surface as shown in the Plans . All holes or depressions found prior to acceptance of the project shall be filled with additional material , reworked , and compacted as necessary. A load ticket , indicating truck identification, date and time of delivery, and weigh t shall be furnished to the Engineer with each load delivered to the project . 402.0 4 METHO D OF MEASUREMENT . The quantity of Aggregate Shoulders and Aggregate Shoulders, RAP to be measured for payment will be the number of tons used in the complete and accepted work, as determined from load ticket s. Partial loads shall be paid for on a prorated basis.