(a) All materials used in the construction of new streets, curb and gutter and sidewalks shall be in accordance with the latest edition of the NCDOT's “Standard Specifications for Roads and Structures” and the requirements contained herein.
(b) Materials and mixes.
(1) Asphalt concrete base course - Type B-25.0B. Conforming to materials and compositions required in NCDOT Section 610, Asphalt Concrete Plant Mix Pavements. If approved use by the city as a base material, a minimum compacted thickness of 4 inches is required.
(2) Tack coat. Conforming to materials and compositions required in NCDOT Section 605, Asphalt Tack Coat.
(3) Asphalt concrete surface course - Type SF9.5A. Conforming to materials and composition required in NCDOT Section 610, Asphalt Concrete Plant Mix Pavements. For higher traffic volumes, an alternate surface mixture such as S9.5B may be required by the city. Minimum thickness of surface course shall be 2 inches.
(4) Concrete for curb and gutter, and sidewalks. Conforming to materials and composition required in NCDOT Section 846, Concrete Curb, Curb and Gutter, Concrete Gutter, Shoulder Berm Gutter, Concrete Expressway Gutter, Concrete Valley Gutter and Concrete Flumes, and Section 848, Concrete Sidewalks and Driveways and Wheelchair Ramps.
(5) Base course. Aggregate base course shall comply with requirements of NCDOT Section 520, aggregate base course. If used as a base material, a minimum compacted thickness of 8 inches is required.
(6) Structural fabric. Provide structural fabric specifically designed and manufactured to stabilize soft soils under an aggregate base for roads and parking areas. Fabric shall provide a permeable layer, planar flow, and tensile reinforcement for retaining the soil matrix. Fabric shall be inert to commonly encountered chemicals, hydrocarbons, resistant to mildew, rot, and ultraviolet light exposure, and meet or exceed the following test standards:
Test | ASTM |
a. Fabric weight | D-1910 6 (oz / sq yd) |
b. Grab tensile strength | D-1682 200 (lbs.) |
c. Mullen burst strength | D-3786 320 (psi) |
d. Puncture strength | D-751 80 (lbs.) |
(Ord. of 11-7-16, No. 10-16)