Thermoplastic Traffic Striping Material,

Hydrocarbon Resin Binder, White and Lead-Free Yellow

1.0 SCOPE

This specification covers a hot-melt, retroreflective, Thermoplastic traffic marking material that is suitable for producing durable traffic stripes and pavement markings on Portland cement concrete or asphalt concrete pavements. This material is heated and applied to road surfaces in a molten state using a mechanical applicator. While still hot, reflectorizing Glass Beads are applied to the surface of the applied Thermoplastic striping material. Upon cooling to normal pavement temperatures this material shall produce durable, adherent, retroreflective traffic stripes and pavement markings that are capable of resisting deformation by traffic.

2.0 APPLICABLE SPECIFICATIONS

The following specifications, test methods and standards in effect on the opening date of the Invitation for Bid form a part of this specification where referenced.

• California Test Methods (CTM); No. 423 and No. 660 (latest revision).

• California Department of Transportation, Standard Specifications, May 2006.

• Federal Standard Designation: No. 595b, color #33538.

• U.S. Environmental Protection Agency (EPA), SW-846, Methods 3052 and 6010B.

• American Association of State Highway and Transportation Officials, (AASHTO) Designation: M 247 and AASHTO Designation: T 250.

• American Society for Testing and Materials, (ASTM) Designations; D 476, D 2794, D 3335, D 3718, D 4563, D 4764, D 5380, D 5381, D 6359, D 6628, E 11, E 28, E 313, E 1710, and G 155.

• Commission International de l’Eclairage (C.I.E.) 1931 Chromaticity Diagram.

• California Code of Regulations: Title 22.

3.0 REQUIREMENTS

3.1 Composition:

The Thermoplastic material shall be composed of 100% solids. The binder shall consist of synthetic hydrocarbon Thermoplastic resins which are homogeneously blended together with all necessary prime pigments, fillers, Glass Beads and additives to produce a traffic striping material that meets the requirements as specified herein. All Thermoplastic material shall be free from; lead, chromium, cadmium, barium and other toxic metals.

3.1.1 White Material:

White thermoplastic shall contain a minimum of 10% (by weight) of titanium dioxide pigment meeting ASTM D476 Type II (Rutile). The titanium dioxide content will be determined using ASTM Designations; D 4563, D 4764, D 5380 or other x-ray diffraction analysis method. White thermoplastic must meet the Retroreflectivity requirement when applied with drop-on Glass Beads.

This specification cancels and supercedes; specification #PTH-02HYDRO (February, 2006 and September , 2002), specification #8010-01B (March, 2000),

specification #8010-01A (July, 1997), specification #8010-01 (March, 1994) and specification #8010-21C-21 (March, 1992).

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Spec.# PTH-02HYDRO

(February, 2009)

3.1.2 Lead-Free Yellow Material:

Lead-Free (L/F) yellow thermoplastic shall contain proper amounts of C.I. Pigment Yellow 83 (opaque version) and titanium dioxide (Rutile) to produce a yellow material that has a weather-fast and heat stable yellow color which meets the; Yellow Color, Reflectance, Color Stability (Accelerated Weathering) and Retroreflectivity requirements as stated herein. Other pigments may be added to achieve these color requirements. The L/F yellow thermoplastic material shall appear yellow during both daytime and nighttime conditions when applied with drop-on beads.

3.1.3 Other Ingredients:

The remainder of the thermoplastic composition shall be determined by the manufacturer - within the constraints of the requirements below. It shall be the manufacturer's responsibility to produce a thermoplastic material containing the necessary plasticizers, antioxidants, and other additives so that the thermoplastic will retain its color, viscosity and all other properties as specified herein. In addition to being essentially lead and chromium free, the thermoplastic shall not contain any hazardous materials at levels that would cause the thermoplastic to be classified as a hazardous waste under Title 22, Division 4, section 66261.20 of the California Code of Regulations.

3.2 Form:

The thermoplastic material shall be supplied in either block or granular form as requested in the purchase order.

3.3 Application Type/Viscosity:

Two viscosity grades of thermoplastic material shall be available for purchase; Extruded-Viscosity and Low-Viscosity. Extruded-Viscosity grade is more suitable for screed type applicators and thicker applications (+2.5mm), including recessed applications. Low-Viscosity grade material is commonly used with ribbon or spray type applicators. The thermoplastic material shall be formulated to meet the viscosity grade specified in the purchase order.

3.4 Characteristics of the Finished Thermoplastic:

Use California Test Method No. 423 (CTM 423) unless otherwise specified.

White L/F Yellow

3.4.1 Glass Bead Content, intermixed, 30-35 30-35

Percent by weight, CTM 423 (Part 4).

Glass Beads shall meet AASHTO Designation: M 247

Type I, except the Glass Beads shall not contain more

than 200 ppm (total) arsenic, 200 ppm (total) antimony,

nor more than 200 ppm (total) lead, when

tested according to EPA Methods 3052 and 6010B.

Other suitable x-ray fluorescence spectrometry analysis

methods may be used to screen samples of glass

beads for arsenic, antimony and lead content. White L/F Yellow

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Spec.# PTH-02HYDRO

(February, 2009)

3.4.2 Binder Content, percent by weight, minimum. 18 18

CTM 423 (Part 3).

White L/F Yellow

3.4.3 Inert Fillers, insoluble in hydrochloric acid, 100 100

percent passing a sieve with openings

of 150μm, percent by weight, minimum,

ASTM Designation: E 11.

White L/F Yellow

3.4.4 Titanium Dioxide (Rutile) Pigment 10 ---

meeting ASTM Designation D476 Type II,

analyze titanium dioxide content using

ASTM Designation: D 4563, D 4764,

D 5380 or other x-ray diffraction method,

percent by weight, minimum.

White L/F Yellow

3.4.5 Specific Gravity, maximum, 2.15 2.15

CTM 423 (Part 5).

White L/F Yellow

3.4.6 Ring and Ball Softening Point, 93-121°C 93-121°C

CTM 423 (Part 6), ASTM Designation: E 28.

3.4.7 Perform the remaining tests on the material after 4 hours heating with stirring at 218 + 2°C. This 4-hour period includes time required (~1 hr.) for melting and temperature stabilization of the 6 kg. sample.

White L/F Yellow

3.4.7.1 Tensile Bond Strength to an unprimed 1.24 MPa 1.24 MPa

abrasive blasted Portland cement concrete brick,

3.2 mm thick film draw down at 218°C,

tested at 25 + 2°C, MPa, minimum,

CTM 423 (Part 7).

White L/F Yellow

3.4.7.2 Brookfield Thermosel Viscosity,

Low-Viscosity Grade - - - - - - - - - - - - - <4.5 <4.5

Extrude-Viscosity Grade - - - - - - - - - - - 4.5 to 10 4.5 to 10

Spindle SC4-27, 20 rpm at 218°C, Pa•s,

CTM 423 (Part 8).

White L/F Yellow

3.4.7.3 Impact Resistance, 3.2 mm thick film 0.58 0.58

draw down at 218°C on an unprimed

abrasive blasted Portland cement concrete brick,

male indentor 15.9 mm diameter, no female die.

Test at 25 + 2°C, kilogram force•meter,

with no; chips, cracks or bond loss, minimum

CTM 423 (Part 9), ASTM Designation D 2794.

3.4.7.4 Daylight Luminous Reflectance 80 Minimum 42 to 59

CTM 423 (Part 11) except use a BYK-Gardner

“Color-Guide” Spectrophotometer. Follow the

manufacturer’s instructions to obtain the

Reflectance or “Y” value. Set-up the spectro-

photometer for 2° Observer and Illuminant “C”

measurement conditions.

White L/F Yellow

3.4.7.5 Yellow Color, shall match Federal Standard --- Pass

Designation: No. 595b, color #33538 and

shall lie within the following chromaticity

limits “colorbox” defined by plotting the following

four (x,y) pairs on a C.I.E. 1931 Chromaticity diagram;

(x1,y1) = (0.5125, 0.4866)

(x2,y2) = (0.4865, 0.4647)

(x3,y3) = (0.5000, 0.4416)

(x4,y4) = (0.5348, 0.4646)

Reflectance(Y) shall be between 42 and 59.

Measurement conditions = 2°Observer/illuminant “C”.

Tested according to CTM 423 (Part 10) except use a

BYK-Gardner “Color-Guide” Spectrophotometer

to measure the color. Follow the manufacturers

instructions to obtain the (x,y) chromaticity coordinates.

See attached Yellow Color graph.

White L/F Yellow

3.4.7.6 Yellowness Index, maximum 10 ---

Follow CTM 423 (Part 11) except use a

BYK-Gardner “Color-Guide” Spectrophotometer

to measure the Yellowness Index of the white

thermoplastic using the ASTM Designation: E313 mode.

3.4.7.7 Color Stability after Accelerated Weathering,

ASTM Designation: G 155, Table X3.1, Cycle 1,

500 hours total exposure time. Prepare sample

by dipping a sheet aluminum panel into the molten

thermoplastic and removing it to obtain a 1.5 to 3mm

coating thickness of thermoplastic on the panel.

Place the panel in the weathering apparatus for 500 hrs.

After accelerated weathering, measure the Yellow

Color or Yellowness Index as in section 3.4.7.5 or

3.4.7.6 above. Material must meet the color stability

requirements below after this exposure.

White L/F Yellow

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Spec.# PTH-02HYDRO

(February, 2009)

White - Yellowness Index, maximum 20 ---

Yellow - Measured chromaticity coordinates must --- Pass

fall within a “colorbox” defined by plotting

the following four (x,y) pairs on a C.I.E.

1931 Chromaticity diagram.

See attached Yellow Color graph.

(x1, y1) = (0.5125, 0.4866)

(x2, y2) = (0.4650, 0.4466)

(x3, y3) = (0.4750, 0.4251)

(x4, y4) = (0.5348, 0.4646)

White L/F Yellow

3.4.7.8 Hardness, Shore A-2 Durometer, 45 to 75 45 to 75

measure according to CTM 423 (Part 12) except

condition the sample for 2 hrs. in a 46.1°C water

bath before measuring the Hardness. The Durometer

is also conditioned at 46.1°C in a forced air oven.

Remove the sample from the water bath and quickly

place the Durometer on the sample while starting

a stopwatch. Record the Hardness after 15 seconds.

The total weight of the Durometer shall be 2000 grams.

Note: Thermoplastic for recessed application

shall have a Hardness between 30 and 50.

White L/F Yellow

3.4.7.9 Abrasion Test 10 10

Use 400 g of graded Glass Beads between

600 and 850 μm diameter and an air pressure

of 152 kPa to sandblast the sample in 4

different areas according to CTM 423 (Part 14),

total weight loss, grams, maximum.

White L/F Yellow

3.4.7.10 Lead, mg/kg in thermoplastic, 20 20