SCOPE
731.01.01 Materials Covered. Engineering fabrics shall include pavement reinforcing fabric, geotextile,
geogrid, geomembrane, and any additional fabric types that may be speci fied in the Special Provisions. Furnish engineering fabrics in protective opaque covers capable of protecting the fabric from ultravi olet rays, abrasion, and water. Store t he engineering fabrics in accordance with the manufacturer’s recommendations. If stored outdoors, fabrics shall remain covered and off of the ground. During installation, the fabrics shall not be exposed to ultraviolet rays for more than 14 days. REQUIREMENTS
731.02.01 Certificates. Furnis h a Certificate of Compliance for each type of engineering fabric used on the
project according to Subsection 106.05. PHYSICAL PROPERTIES AND TESTS
731.03.01 Pavement Reinforcing Fabric. The pavement reinforcing fabric shall be constructed of a
fiberglass/polymer composite and shall conform to the following: PROPERTY TEST METHOD REQUIREMENT Tensile Strength , Each Direction ASTM D6637 100 kN /m (560 lb/in.) Minimum Elongation at Break ASTM D6637 < 5% Melting Point ASTM D276 > 218 °C (> 425 °F) Grid Size , Square — 20-25 mm ( 0.75-1.0 in. )
731.03.02 Geotextile (Class 1). The geotextile shall be nonwoven needle- punched polypropylene fabric and
shall conform to the following: PROPERTY TEST METHOD REQUIREMENT Survivability AASHTO M288 CLASS 1 Permittivity ASTM D4491 ≥ 0.5 sec-1 Apparent Opening Size (AOS) , U.S. Sieve No. ASTM D4751 100 ≤ AOS ≤ 60 Ultraviolet Stability @ 500 hr , Strength Retained ASTM D4355 ≥ 50 %
731.03.03 Geotextile (Class 2). The geotextile shall be n onwoven needle- punched polypropylene fabric and
shall conform to the following: PROPERTY TEST METHOD REQUIREMENT Survivability AASHTO M288 CLASS 2 Permittivity ASTM D4491 ≥ 0.5 sec-1 Apparent Opening Size (AOS) , U.S. Sieve No. ASTM D4751 100 ≤ AOS ≤ 60 Ultraviolet Stability @ 500 hr , Strength Retained ASTM D4355 ≥ 50 %
731.03.04 Geogrid. The geogrid shall be single layered, biaxial, and shall be made of high density polyethylene
or polypropylene . The geogrid shall be manufactured by being extruded, coextruded, or integrally formed and shall conform to the following: PROPERTY TEST METHOD REQUIREMENT Aperture Size Range I.D. Callipered 25-50 mm (1-2 in.) Rib Shape Visual Observation Rectangular or Square Tensile Strength @ 5% Strain, Cross Direction ASTM D6637 11.4 kN/m (780 lb/ft) Minimum Tensile Strength @ 5% Strain, Machine Direction ASTM D6637 19.0 kN/m (1300 lb/ft) Minimum 731 ENGINEERING FABRICS
731.03.05 Geomembrane. The geomembrane shall be impermeable and made of smooth high density
polyethylene and shall conform to the following: PROPERTY TEST METHOD REQUIREMENT Sheet Thickness ASTM D5 199 1.0 mm (40 mil) Minimum Density ASTM D1505 0.94 g/cm3 (58 lb/ft3) Minimum Tensile Strength at Yield ASTM D638 15 kN/m (84 lb/in. ) Minimum Tear Resistance ASTM D1004 125 N (28 lb) Minimum Puncture Resistance ASTM D4833 320 N (72 lb) Minimum SECTION 732 P AVEMENT MARKING FILM SC OPE 732.
01.01 Material Covered. This specification covers the quality requirements for pavement marking tape and
thermoplastic marking material. R EQUIREMENTS 732.
02.01 Certificates. Furnish a Certificate of Compliance for the pavement marking film according to
Subsection 106.05. PH YSICAL PROPERTIES AND TESTS 732.
03.01 Pavement Marking Tape (Type 1). Type 1 marking tape shall conform to ASTM D4505; Reflectivity
Level II; Adhesive Class 1, 2, or 3; Skid Resistance Level A. Use Type 1 pavement marking tape listed in the QPL. 732.
03.02 Pavement Marking Tape (Type 2). Type 2 marking tape shall conform to ASTM D4505; Reflectivity
Level II; Adhesive Class 1, 2, or 3; Skid Resistance Level B. Use Type 2 pavement marking tape listed in the QPL. 732.
03.03 Pavement Marking Tape (Type 4). Type 4 marking tape shall conform to ASTM D4505; Reflectivity
Level I; Adhesive Class 1, 2, or 3; Skid Resistance Level A. Use Type 4 pavement marking tape listed in the QPL. 732.
03.04 Thermoplastic. Use thermoplastic listed in the QPL.
(
a.Hot Applied Thermoplastic. Hot applied thermoplastic marking material shall conform to AASHTO M249 except as modified by the following: 1.I n paragraph 3.1.2 of AASHTO M249, add the following: T he resin shall be composed of alkyd resins wherein a minimum of 70% by mass of the combined resin, filler, and pigment shall be modified glycerol ester of rosin. 2.I n paragraph 4.3 of AASHTO M249 add the following physical characteristics: T he infrared spectra of the extracted resin will be compared to the characteristic absorption bands of maleic modified glycerol ester of rosin. 3.I n paragraph 4.3.1 of AASHTO M249, add the following: T he yellow color may also conform to Federal Test Standard No. 595B, Color No. 13655. T he material shall be capable of being applied at a temperature between 190 ° C to 230 ° C (375 ° F to 450 ° F) and to the required thickness without excessive overspray, running, or deformation of the edges. The marking compound shall contain glass beads and shall have a top dressing of glass beads applied. The t hermoplastic material shall be capable of bearing traffic within 5 minutes after application and show no deformation or flaking at temperatures between – 23 °C to 60 ° C (–10 °F to 140 ° F). (
b.Preformed Thermoplastic. The preformed thermoplastic material shall conform to the following:
1.C omposition. The thermoplastic material shall conform to AASHTO M249 with the exception of the relevant differences due to the material being preformed, and the following specifications. The preformed thermoplastic pavement markings shall consist of a homogeneous mixture of resins, fillers, pigments, and glass beads. The resin shall be the alkyd type thermoplastic composed of a modified ester rosin. The i nfrared spectra of the extracted resin will be compared to the characteristic absorption bands of maleic modified glycerol ester of rosin. 2.G lass Beads. The markings shall contain a minimum of 30% glass spheres which shall conform to AASHTO M247, Type 1, except that glass spheres shall have a minimum of 70% true spheres on each sieve and 80%true spheres overall.
Source: Nevada Standard Specifications for Road and Bridge Construction, 2014 Edition. Pages 605–606 of 610.