715.01 780 SECTION 715 – ASPHALTIC CONCRETE CURB (HOT MIX)
715.01 Description ................................ ................................ ................... 780
715.02 Materials ................................ ................................ ...................... 780
715.03 Composition of Mixture ................................ ............................... 780
715.04 Equipment ................................ ................................ .................... 781
715.05 Limitations ................................ ................................ ................... 782
715.06 Preparing the Curb Foundation ................................ .................... 782
715.07 Preparing the Mixture ................................ ................................ .. 782
715.08 Hauling and Placing Mixture ................................ ....................... 782
715.09 Curing and Protection ................................ ................................ .. 783
715.10 Method of Measurement ................................ .............................. 783
715.11 Basis of Payment ................................ ................................ .......... 783
DESCRIPTION
715.01 Description
This work consists of constructing an asphaltic concrete curb composed of a mixture o f coarse aggregate, fine aggregate, mineral filler (if specified or required), and asphalt cement, on a prepared foundation. MATERIALS
715.02 Materials
Provide materials meeting 411.02, except that commercially available stabilizing material may be added with the Engineer’s approval.
715.03 Composition of Mixture
The composition of the mixture shall conform to the requirements of 411.03 with the following additions and revisions: 715.04 781 A. Proportioning Combine the mineral aggregate and asphalt cement as specified in Table
715.03 1.
Table 715.03-1: Proportioning Combined Mineral Aggregate Asphalt Cement 90-94% 6-10%
B.Mineral Aggregate Use mineral aggregate of Grading E, except that other gradings that have a history of satisfactory performance may be used when approved by the Engineer.
C.Job Mix Formula Use a job mix formula that will provide sufficient workability during placing and that wil l ensure a finished curb of adequate stability and the desired surface texture. EQUIPMENT
715.04 Equipment
Use mixing and hauling equipment that meet 407.04 and 407.05. To place the curb, use an approved self -propelled automatic curb machine capable of producing a smooth, well -compacted finished curb. Equip the machine with a hopper sufficient in capacity to ensure a continuous operation, and a pow er driven screw or other device that forces the mixture through a tube and then through a die or mold attached to the tube. Ensure that the mold will produce the desired cross -section of the curb. The machine shall be so constructed that the thrust again st the asphaltic mixture will eliminate objectionable surface voids as the mixture passes through the mold. 715.05 782 CONSTRUCTION REQUIREMENTS
715.05 Limitations
Comply with 407.09.
715.06 Preparing the Curb Foundation
When the curb i s to be placed on a granular base, remove all soft or otherwise unsuitable material and replace with suitable material. Thoroughly compact the finished base, and shape to the required line, grade, and cross -section, and prime in accordance with the applic able provisions of 402. When the curb is to be placed on an existing pavement, thoroughly clean the area receiving the curb of all dirt and other objectionable matter. Apply a tack coat to this area in accordance with the ap plicable provisions of 403.
715.07 Preparing the Mixture
Prepare the asphaltic concrete curb mixture as specified in 407.11, 407.12, and 407.13.
715.08 Hauling and Placing Mixture
Use hauling equipment of an approved type, and schedule hauls so that the temperature of mixture when deposited is not more than 25 F lower than when it left the mixing plant. Place the curb in position on the tacked or primed surface using an approved automatic curb machine that shapes and compacts the mixture to the designated cross -section. No side forms will be required for machine placed curb, but where t he curb is laid on an existing pavement that does not have a smooth grade, the Engineer may require use of a 2 x 2 inch angle iron or other approved apparatus as a track so that the finished curb will have a smooth and true line and grade. Where the curb i s to abut an existing structure -wall or is placed at the extreme edge of pavement, use a machine that is capable of placing the curb within 1 inch of the structure -wall or pavement edge. Only use hand methods adjacent to structures that preclude machine p lacing. 715.09 783 On grades greater than 3%, place the curb with the machine traveling uphill. If, in the Engineer’s opinion, the curb is not being adequately compacted, take corrective action. Corrective measures may include adjusting the mix, loading the machine with additional weight, retarding forward movement of the machine by braking, or other measures that will ensure adequate compaction. Carefully construct required joints so as to ensure a continuous bond between the old and the new sections of the curb.
715.09 Curing and Protection
Protect the newly laid curb from traffic by barricades or other suitable methods until the asphaltic mixture has cooled to air temperature. Remove and replace curb or sec tions of curb that are displaced, destroyed, or otherwise damaged before final acceptance.
715.10 Method of Measurement
The Department will measure Asphalt Concrete Curb for payment by the linear foot, complete in place.
715.11 Basis of Payment
The Department will pay for accepted quantities, complete in place, at the contract prices as follows: Item Pay Unit Asphaltic Concrete Curb ( __ inches) Linear Feet 716.01 784 SECTION 716 – PAVEMENT MARKINGS
716.01 Description ................................ ................................ ................... 784
716.02 Materials ................................ ................................ ...................... 784
716.03 Thermo plastic Pavement Marking ................................ ............... 785
716.04 Raised Reflective Pavement Markers ................................ ........... 790
716.05 Snowplowable Reflective Pavement Marker ............................... 791
716.06 Preformed Plastic Pavement Markings ................................ ........ 792
716.07 Paint ................................ ................................ ............................. 793
716.08 Method of Measurement ................................ .............................. 796
716.09 Basis of Payment ................................ ................................ .......... 797
DESCRIPTION
716.01 Description
This work consists of furnishing and supplying pavement markings in accordance with these Specifications and the latest revision of the MUTCD, including establishing and locating non -passing zones as well as providing the layout of paint striping, preforme d plastic pavement markings, raised reflective pavement markers, snowplowable reflective pavement markers, and thermoplastic pavement markings. MATERIALS
716.02 Materials
Provide materials as specified in: Paint ................................ ................................ ............................ 910 Thermoplastic Pavement Markings ................................ ....... 919.01 Spray Thermoplastic Pavement Marking ............................... 919.02 Preformed Plastic Pavement Marking ................................ .... 919.03 Raised Reflective Pavement Markers ................................ .... 919.04 Snowplowable Reflective Pavement Markers ....................... 919.05 Plastic pavement markings may be either preformed or thermoplastic unless otherwise specified.
Source: Tennessee Standard Specifications for Road and Bridge Construction, 2021 Edition. Pages 789–792 of 1,072.