- 330 - SECTION 505 -- ASPHALTIC CONCRETE CURB
505.01 Description
1.This work consists of constructing asphalt curbs as shown in the contract.
505.02 Material Requirements
1.The curb will be constructed of the same type of asphaltic concrete mixture used in the surface course or a commercially available asphaltic concrete approved by the Engineer.
505.03 Construction Methods
1.Asphaltic concrete construction methods described in Section 503 shall also govern the construction of curbs.
2.The Contractor shall shape and compact curbs with a curb machine. Uniform density and smooth surface texture must be attained.
3.The Contractor shall clean a nd apply a tack coat to the contact surface. The tack coat shall be applied in accordance with the requirements of Section 504 and shall extend 4 inches (100 mm) beyond the curb contact surface in all directions. The rate of application shall be as directed by the Engineer. Heating the surface may be required to achieve a bond with the new asphaltic concrete. The heating shall be done so that no portion of the asphaltic concrete is damaged by excessively high temperatures.
4.The newly constructed curb and a 24 inch (600 mm) width of the adjoining surface (gutter) shall be sealed by the application of a tack coat. The rate will be determined by the Engineer.
505.04 Method of Measurement
1.Asphaltic concrete curb length is measured by the linear foot (meter).
505.05 Basis of Payment
1.P a y I t e m P a y U n i t Constructing Asphaltic Concrete Curb Linear Foot (LF) [Meter (m)]
2.Materials required to construct curbs are included in the pay items "Asphaltic Concrete, Type _____" and "Performance Graded Binder_____" of the surface course in Section 503.
3.Payment is full compensation for the work described in this Section. - 331 - SECTION 506 -- ASPHALTIC CO NCRETE ISLAND NOSES AND MEDIANS
506.01 Description
1.This work consists of constructing asphaltic concrete island noses and medians as shown in the contract.
506.02 Material Requirements
1.Island noses and medians shall be constructed from the same type of asphaltic concrete mixture used in the surface course or a commercially available asphaltic concrete approved by the Engineer.
506.03 Construction Methods
1.Asphaltic concrete construction methods described in Section 503 shall also govern island nose and median construction.
2.The Contractor shall use equi pment and methods that insure the asphaltic concrete island noses and medians are constructed to a uniform density with a smooth surface texture.
3.a. The Contractor shall clean and apply a tack coat to the contact surface. The tack coat shall be applied in accordance with the requirements of Section 504 and shall extend 4 inches (100 mm) beyond all sides of the nose. The rate of application shall be as directed by the Engineer.
b.Heating the surface may be required to achieve a bond with the new asphaltic concrete. The heat ing shall be performed so that no portion of the asphaltic concrete is damaged by excessively high temperatures.
4.The Contractor shall seal the newly constructed island nose and/or median by the application of a tack coat. The application rate will be determined by the Engineer.
506.04 Method of Measurement
1."Construct Asphaltic Concrete Island Nose" will be measured by the each.
2.Asphaltic concrete for a median is included in the roadway materials and a separate pay item for m edian construction is not authorized.
506.05 Basis of Payment 1. P a y I t e m P a y U n i t
Constructing Asphaltic Each (ea) Concrete Island Nose
2.Materials required to construct island noses and all construction costs for medians are included in the roadway pay items for "Asphaltic Concrete, Type _____" and "Performance Graded Binder_____".
3.Payment is full compensation for all work described in this Section.
Source: Nebraska Standard Specifications for Highway Construction, 2017 Edition. Pages 364–364 of 1,048.