143 SECTION 307 DESCRIPTION
307.01.01 General. This work consists of shoulder preparation and placing shouldering material.
MATERIALS
307.02.01 General. Material shall conform to the following Section and Subsection:
Shouldering Material ............................................................................................................................................... Subsection 704.03.09 Water ..................................................................................................................................................................................... Section 722 CONSTRUCTION
307.03.01 Shoulder Preparation. Prior to the placement of shouldering material, clear and grub all shoulders
for a minimum width of 3 m (10 ft) from the edge of pavement, but no more than needed to place and compact the material. Clear and grub to remove all vegetation, organic material, trash, and non-organic material greater in size than the largest allowable gradation specified for the shouldering material, or the largest allowable gradation specified for cold millings when milled material is to be placed. Do not alter or modify existing drainage unless directed. Dispose of the material resulting from the shoulder preparation according to Subsection 107.14, unless otherwise directed.
307.03.02 Placement and Compaction. Initially place the shouldering material by mechanical means.
Windrows exceeding 100 mm (4 in.) in height will not be allowed when the adjacent lane is open to traffic. Place all material within the limits of the prepared shoulder. Do not place material in roadway ditches or on back slopes. Grade the lower edge of the shouldering material flush with the existing slope. Grade and compact shouldering material after paving has been completed. Finish shoulders by grading material according to Subsection 105.03. Achieve final compaction by applying enough water to adequately wet all material and roll with a steel wheeled roller at all locations unless otherwise directed. Place, finish, and compact all shouldering material to the satisfaction of the Engineer. METHOD OF MEASUREMENT
307.04.01 Measurement. Shouldering material will be measured by the metric ton (ton).
The mass of any water added to the shouldering material before weighing will be deducted from the quantity measured for payment. BASIS OF PAYMENT
307.05.01 Payment. The accepted quantities, measured as provided above, will be paid for at the contract unit
price per unit of measurement for the pay item listed below that is shown in the proposal. Payment will be full compensation for the work prescribed in this Section. Payment will be made under: Pay Item Pay Unit Shouldering Material ....................................................................................................................................................... Metric Ton (Ton) 145 SECTION 401 PLANTMIX BITUMINOUS PAVEMENTS — GENERAL DESCRIPTION
401.01.01 General. These specifications include general requirements that are applicable to all types of
bituminous pavements of the plantmix type, irrespective of gradation of aggregate, kind and amount of bituminous material, or pavement use. Deviations from these general requirements will be indicated in the specific requirement for each type. This work consists of constructing one or more courses of bituminous mixture on the prepared foundation. MATERIALS
401.02.01 General. Material shall conform to the following Sections and Subsection:
Bituminous Materials ................................ ................................ ................................ ................................ .............................. Section 703 Aggregates for Bituminous Courses ................................ ................................ ................................ ................................ ....... Secti on 705 Commercial Mineral Filler ................................ ................................ ................................ ................................ ........ Subsection 705.03.03 Engineering Fabrics ................................ ................................ ................................ ................................ ............................... Section 731
401.02.02 Composition of Mixtures. Compose the bituminous plantmix of a mixture of aggregate, mineral
filler, and bituminous material. Size, uniformly grade, and combine the several aggregate fractions in such proportions that the resulting mixture meets the grading requirements of the job -mix formula. Do not commence paving or coldmilling operations until the following requirements have been complied with:
a.An approved mix design conforming to the requirements of this Subsection and Section 705 is received from the Department’s Materials Division. Mix Design Requirements (Plantmix and Premixed Bituminous Surface Aggregates): TEST TEST METHOD REQUIREMENTS Percent Air Voids of Compacted Bituminous Mixture (Types 2 and 3) AASHTO T269 * 4% Percent Air Voids of Compacted Bituminous Mixture (Type 2C) AASHTO T269 * 4% Percent Air Voids of Compacted Bituminous Mixture (Types 2 and 3) (Premixed) AASHTO T269 3 to 9% Stabilometer Value (Type 2) Nev. T303 35 Min . Stabilometer Value (Type 2C) Nev. T303 37 Min. Stabilometer Value (Type 3) Nev. T303 30 Min. Indirect Tensile Strength (Unconditioned) (Types 2 and 2C, except with PG 76 -22NV or PG 76 -22NVTR Asphalt) Nev. T341 448 kPa (65 psi) Min. Indirect Tensile Strength (Unconditioned) (Types 2 and 2C with PG 76 -22NV or PG 76 -22NVTR Asphalt) Nev. T341 689 kPa (100 psi) Min. Indirect Tensile Strength (Unconditioned) (Type 3) Nev. T341 400 kPa (58 psi) Min. Indirect Tensile Strength (Retained Strength) Nev. T341 70% Min. Voids in Mineral Aggregate (Types 2 and 2C Plantmix Aggregate) Nev. T338 12 to 22% * The mix design percent air void requirement may be adjusted by the Department to obtain passing values for other mix design requirements. In addition, the mixture design will be evaluated per Nevada Test Method No. Nev. T760. Mixture designs not meeting this requirement may be rejected.
b.Based upon the approved mix design, submit a written proposed job -mix formula for use by the Engineer in setting the job -mix to be used. For metric unit contracts, provide the proposed job -mix formula in metric units or both metric and English units. For English unit contracts, provide the proposed job -mix formula in English units or both English and metric units. Identify the asphalt cement supplier and shipping point in the job-mix formula. Include in the proposed formula definite single values for:
1.The percentage of aggregate passing each specified sieve.
2.The p ercentage of bitumen (bitumen ratio) to be added (to 0.1%), by dry weight of aggregate.
3.The temperature of the mixture leaving the mixer.
4.The minimum temperature of the mixture in the windrow or in the hopper of the paver .
5.The percentage of each aggregate bin used. (Bin percentages of less than 5% will not be allowed.)
Source: Nevada Standard Specifications for Road and Bridge Construction, 2014 Edition. Pages 149–150 of 610.