SCOPE
728.01.01 Materials Covered. This specification covers the type and quality of epoxy materials.
REQUIREMENTS
728.02.01 Sampling and Testing. Do not use epoxy before sampling and testing unless its use is permitted
according to Subsection 106.05. All tests will be conducted according to the test methods of the ASTM, Federal Test Method Standard No. 141, and methods in use by the Department.
728.02.02 Certificates. Furnish 2 certificates from the manufacturer covering each order of material, certifying
that the product complies with the specifications. Deliver certificates at the time of, or before, delivery of the order.
728.02.03 Packaging, Labeling , and Storing. Package each component in steel containers not larger
than 20 L (5 gal) in volume. When the components are to be mixed at a ratio of 2 parts A to 1 part B, by volume, the container containing component B shall be one- half the volume of the container containing component A. Provide new containers with lug type crimp li ds with ring seals, not less than 0.64 mm (0.025 in.), meeting United States Department of Transportation Hazardous Materials Shipping Regulations, and well sealed to prevent leakage. If a lining is used in the containers, make it of such character as to resist any action by the components. Clearly label each container with the designation (Component A or B), type (standard or rapid), if applicable, manufacturer’s name, date of manufacture, batch number (a batch shall consist of a single charge of all components in a mixing chamber), all directions for use. Do not use any material which shows evidence of crystallization or a permanent increase in viscosity or settling of pigments which cannot be readily redispersed with a paddle.
728.02.04 Directions fo r Use. Mix when components A and B are at a temperature between 16 and 29 °C
(60 and 85 ° F), unless otherwise specified. Perform any heating of the adhesive components by application of indirect heat. Immediately before mixing, thoroughly mix each component with a paddle. Use separate paddles to stir each component. Immediately before use, thoroughly mix the 2 components together in the specified ratios. When mixed, all adhesives shall have a uniform gray color without black or white streaks. Do not add sol vent to any epoxy. After mixing, place epoxies in the work and also place any overlaying or inserted material which is to be bonded to the work by the epoxy before thickening of the epoxy has begun. Place epoxy on surfaces free of rust, paint, grease, asphalt, and loose and deleterious material. When epoxy is used as a binder to make epoxy concrete or mortar, thoroughly mix the 2 components of epoxy together before the aggregate is added. Unless otherwise specified, the mix proportions shall consist of 1 part of binder to approximately 4 parts of aggregate, by volume. Use clean aggregate with a moisture content of not more than 0.5% when tested by Test Method No. Nev. T112. Prime surfaces against which epoxy concrete and mortar are to be placed with a coat of the epoxy just before placing the mortar. TYPES OF EPOXIES
728.03.01 Binder (Adhesive), Epoxy Resin Base. This specification covers a 2 component, low viscosity,
resin base epoxy designed primarily for use as a binder in making epoxy concretes or epoxy mortars, and in pressure grouting of cracks in concrete. The epoxy shall conform to AASHTO M235, Type III, Grade 1, Class A, B, or C. 728 EPOXY
728.03.02 Epoxy Resin Adhesive for Bonding New Concrete to Old Concrete. This specification covers
epoxy resin bonding systems for use in bonding fresh concrete to existing Portland cement concrete and fastening metal anchors in holes in concrete. The epoxy is specified by the following types:
1.Type II is for use in non- load bearing applications for bonding fres h concrete to hardened concrete and shall conform to AASHTO M235 or ASTM C881, Type II, Grades 1, 2, or 3, Class A, B, or C.
2.Type IV is for use in load bearing applications in fastening metal anchors in holes in hardened concrete and shall conform to A ASHTO M235 or ASTM C881, Type IV, Grade 3, Class A, B, or C.
3.Type V is for use in load bearing applications for bonding fresh concrete to hardened concrete and shall conform to AASHTO M235 or ASTM C881, Type V, Grades 1, 2, or 3, Class A, B, or C. Use the Grade and/or Class appropriate for conditions. Manufacturers of epoxy are listed in the QPL.
728.03.03 Rapid Set Epoxy Adhesive. Epoxy used under this specification shall conform to AASHTO M237,
Type I.
728.03.04 Standard Set Epoxy Adhesive. Epoxy used under this specification shall conform to AASHTO
M237, Types II, or III.
728.03.05 Epoxy Sealant for Inductive Loops. This specification covers a high viscosity liquid epoxy
formulated primarily for use in sealing inductive wire loops and leads imbedded in asphalt concrete and Portland cement concrete for traffic signal controls and vehicle counters. Also use this epoxy for repair work on existing spalls, cracks, and other deformations in and around saw cuts housing inductor loops and leads.
a.Composition. Component A Parts by Mass Epoxy Resin l ................................ ........................................................................................................................................... 85.00 Orthocresol Glycidyl Ether 2 ...................................................................................................................................................... 15.00 Titanium Dioxide, ASTM D476, Type III or IV ............................................................................................................................. 2.00 Colloidal Silica 3 ......................................................................................................................................................................... 1.50 Glycerine, ASTM D1257 ................................ ................................ ................................ ................................ ............................. 0.50 Silicone Anti -Foam, Type Q ................................ ........................................................................................................................ 0.01 Component B Parts by Mass High Functionality Polymercaptan Hardener 4 ................................ .......................................................................................... 40.00 N-Aminoethyl Piperazine 5 ........................................................................................................................................................ 10.00 2, 4, 6- Tri (Dimethylaminomethyl) Phenol 6 ................................................................................................................................. 4.00 Polysulfide Polymer 7 ............................................................................................................................................................... 48.94 Colloidal Silica 3 ......................................................................................................................................................................... 1.00 Glycerine, ASTM D1257 ................................ ................................ ................................ ................................ ............................. 0.50 Carbon Black 8 ................................ ........................................................................................................................................... 0.10 Silicone Anti -Foam, Type Q ........................................................................................................................................................ 0.01 1 Di glycidyl ether of bisphenol A, viscosity, 10.0- 16.0 Pa• s (100- 160 poise) at 25 ° C (77 ° F), epoxide equivalent 180- 200. Color, Gardner 1933, 3 max. 2 Viscosity at 25 ° C (77 °F), 0.005- 0.01 Pa• s (5-10 centipoise), mass 1.08-1.09 kg/L (9.00- 9.10 lb/gal). Epoxide equivalent 180- 200. 3 SiO 2 (moisture- free basis), 99% min.; refractive index, 1.46; surface area 175- 225 m2/g; particle size 0.015 μm; pH (4% aqueous dispersion), 3.5- 4.2; pour density, 37 kg/m3 (2.3 lb/ft3) max. ; free moisture at 105 °C (221 ° F), 1.0% max. 4 Liquid polymercaptan resin, viscosity 10.0- 13.0 Pa• s (100- 130 poise) at 25 ° C (77 ° F); specific gravity 1.14- 1.16; mercaptan value, 3.6 meq./g. Color, Gardner 1933, 1. Infrared curve shall match the curve on file with the Department. 5 Color (APHA) 50 max.; amine value 1250- 1350 based on titration which reacts with the 3 nitrogens in the molecule; appearance clear and substantially free of suspended matter. 6 Formula weight 265; specific gravity at 25 °C (77 ° F), 0.973; refractive index 1.514 at 25 °C (77 ° F); distillation range 96% at 130 ° C to 160 ° C (266 ° F to 320 ° F) [0.5 -1.5 mm.]; flash point, Tag. open cup, 149 ° C (300 ° F) min.; water content 0.06% max. 7 Specific gravity, 1.24- 1.30 at 20 ° C (68 ° F); visc osity, 0.7 -1.2 Pa• s (700- 1,200 centipoise), Brookfield at 25 °C (77 ° F); pH water extract, 6.0 -8.0; moisture content, 0.1% max.; pour point, –26 °C (–15 °F); average molecular weight, 1000; flash point, Cleveland Open Cup, 199 ° C (390 ° F) min.; sulfur cont ent, 36- 40%; color, Hellige, 9- 12. The product shall be a difunctional mercaptan made from 98 mole % of bis (2- chloroethyl) formal and 2 mole % of trichloropropane. 8 Surface area, 80- 150 m2/g; particle diameter, 18- 30 nm; pH, 7.0- 8.5; fixed carbon (moisture free), 96- 98%; volatile matter, 1- 4%; oil absorption, stiff paste endpoint, 0.75- 0.90 CCS/g.
b.Tests. Perform tests according to Test Method No. Nev. T501. EPOXY 728
c.Characteristics of Components. Component A Viscosity, Pa •s (poise) at 25 ° C (77 ° F), Brookfield ................................................................................................... 10-25 (100- 250) Shear Ratio . .......................................................................................................................................................................... 2.0 Min. Component B Viscosity, Pa •s (poise) at 25 ° C (77 ° F), Brookfield ................................ ................................................................... 10-25 (100- 250) Shear Ratio .......................................................................................................................................................................... 1.8 Min. Infrared curves of the vehicle components shall match those on file with the Department.
d.Characteristics of Combined Components. Gel Time ............................................................................................... 13-18 minutes on 3 mm (1/8 in.) cast sheet, cured 18 hours at 25 °C (77 ° F) + 5 hours at 70 ° C (158 ° F) Tensile Strength, MPa (psi) ................................ ................................ ......................................................................... 2.7 (400) Min. Elongation, % ................................ ........................................................................................................................................ 90 Min. Shore D Hardness ................................................................................................................................................................. 45 Min. Color to range from Color No. 26081 to Color No. 26173 in Table VII of Federal Standard No. 595B.
e.Directions for Use. Mix one part by volume of Component A to one part by volume of Component B. Use material within 10 minutes from the time mixing operations are started. SECTION 729 TRAFFIC PAINT SCOPE
729.01.01 Material Covered. These specifications cover ready mixed traffic marking paint to be applied to
either asphaltic or Portland cement concrete pavements. REQUIREMENTS
729.02.01 General. Provide paint free from foreign materials, such as dirt, sand, fibers from bags, or other
material capable of clogging screens, valves, pumps, or other equipment used in a paint striping apparatus. Grind the paint pigment and properly disperse in the vehicle. The dispersions sha ll be of such nature that the pigment does not cake or thicken in the container, and does not become granular or curdled. Any settlement of pigment in the paint shall be a thoroughly wetted, soft mass permitting the complete and easy vertical penetration of a paddle. Settled pigment shall be easily redispersed, with minimum resistance to the sideways manual motion of the paddle across the bottom of the container, to form a smooth uniform product of the proper consistency. The specified amounts and material s used in each formula for achieving satisfactory pigment wetting and suspension, may be varied or changed to suit the vendor’s method of manufacture. Paint made with any deviations in antisettling, wetting agents, or stablizers shall still be required to conform to the characteristics of the finished paint and all other requirements of these specifications.
729.02.02 Packaging. Prepare manufactured paint at the factory ready for application. Do not add thinner or
other material to the paint after the paint has been shipped. All shipping containers must comply with Department of Transportation Code of Federal Regulations, Hazardous Materials Regulations Board, Reference 49 CFR. Properly seal all containers with suitable gaskets and which show no evidence of leakage. Label all containers of paint showing the exact title of the specification, manufacturer’s name, date of manufacture, and manufacturer’s batch number. Show precautions concerning the handling and application of paint on the label of the paint container. The lining of the containers shall be of such character as to resist the solvent of this paint and to prevent skins being loosened into the body of the paint.
729.02.03 Certificates. Ship the material to the job site in containers that are substantial and plainly marked
with the manufacturer’s name and address, the color of the material, date of manufacture, and batch number. The material manufacturer shall furnish a notarized certification that the material complies with the provisions of this specification. It shall not be inferred that the provisions of a certification of compliance waives Department inspection, sampling, or testing. PHYSICAL PROPERTIES AND TESTS
729.03.01 Sampling and Testing. Samples will be taken after delivery.
The Department reserves the right to have an inspector present to observe the manufacturing process. Furnish a complete formulation record of the manufacturing process to the Materials Division. Tests will be performed according to ASTM, Federal Test Method Standards No. 141 and methods designated by the Materials Division of the Department.
729.03.02 Materials. The raw materials for use in the paint formula shall conform to the specifications
designated by Federal serial number or paint material code number hereinafter specified. Subsequent amendments to the specifications quoted shall apply to all raw materials and finished products. Paint shall also comply with the paint formulation requirements of the appropriate Subsections below.
Source: Nevada Standard Specifications for Road and Bridge Construction, 2014 Edition. Pages 587–590 of 610.