5-13 Manual – Base Course, FDR and Select Materials . Copies of this manual are available
upon request from the Materials and Tests Unit.
520-10 Maintenance
Where the base material is placed in a trench section, provide adequate drainage through the shoulders to protect the subgrade and base until such time as the shoulders are completed. Maintain the surface of the base by watering, machining, rolling or dragging when necessary to prevent damage to the base by weather or traffic. Where the base or subgrade is damage d, repair the damaged area; reshape the base to required lines, grades and typical sections; and recompact the base to the required density at no cost to the Department.
520-11 Measurement and Payment
Aggregate Base Course will be measured and paid at the contract unit price per ton for the actual number of tons of aggregate which has been incorporated into the completed and accepted work. Sampling and acceptance will be determ ined in accordance with Section 1010. The aggregate will be measured by being weighed in trucks on certified platform scales or other certified weighing devices. If permitted by the contract, the weight of base course material shipped by barge may be dete rmined from water displacement measurements. No deductions will be made for any moisture contained in the aggregate at the time of weighing. Sand seal applied due to the failure of the Contractor to cover the base co urse as required will be incidental to the work of this section. If the Contractor fails to provide sand seal as required and the Engineer has the work performed by other forces, the cost of such work will be deducted from monies due or to become due to the Contractor. Maintenance, repair and r estoration of the base course and subgrade is incidental to the work of this section. If segregation during handling, hauling or placing occurs and the Engineer requires a change in methods or mixing on the road to correct this segregation, this work will be incidental to the work of this section. Removal and replacement of aggregate which is contaminated with foreign materials or outside the gradation limits will be incidental to the work of this section. Payment will be made under : Pay Item Pay Unit Aggregate Base Course Ton
535-1 Description
Perform the work covered by this section including , but not limited to , scarifying, shaping, furnishing water, compacting and maintaining the base. Included in the work is:
A.Conditioning of an existing base to prepare it for the placement of a pavement directly upon the base. Included in the conditioning is scarifying, shapi ng and compacting the base to conform to the required lines, grades, depths and typical sections established by the plans.
B.Conditioning of an existing base in preparation for the placement of additional layers of base material. Included in the conditionin g is scarifying, shaping and compacting the base to conform to the approximate lines, grades, depths and typical sections established by the plans.
Source: North Carolina Standard Specifications for Roads and Structures, 2024 Edition. Pages 241–241 of 857.