80DOT-S4006 Specifications and Requirements~1.docx

Nevada State Purchasing Division Department of Administration 515 E Musser St Ste 300 Carson City, NV 89701 purchasing.nv.gov nevadaepro.com

THE NEVADA STATE PURCHASING DIVISION IS SOLICITING BIDS FOR

A ONE-YEAR OPEN TERM CONTRACT FOR GLASS TRAFFIC BEADS FOR WATERBORNE TRAFFIC PAINT

INVITATION TO BID NO. 80DOT-S4006

F.O.B. Nevada Department of Transportation, Statewide as Indicated Requisition No. OTC

PROJECT OVERVIEW

The purpose of this solicitation is to obtain competitive pricing for glass traffic beads for use with waterborne traffic paint. This solicitation is requesting FOB destination pricing to locations as indicated; freight pricing must be incorporated into unit price.

Awards may be given to multiple vendors. Price increases will not be allowed during term of the contract period. Contract period shall be from date of award through October 31, 2027, with the option of one (1) year extension provided the extension is in the best interest of the State.

SCOPE OF WORK:

SPECIFICATIONS FOR TRAFFIC BEADS FOR WATERBORNE TRAFFIC PAINTS

This specification covers glass beads to be gravity dropped upon 8-25 mils (1.4-4.4 M2/L, 57-179 ft2/gal) of waterborne traffic paint. These beads shall be applied at a rate of 0.67-1.33 Kg/L or (9-12 lb/gal) of traffic paint.

Applicable Documents:

The following documents, of the issue as stated on date of invitation to bid or request for proposal, form a part of this specification to the extent specified herein:

Federal Specification: TT-B-1325 - Beads (Glass Spheres) Retro reflective Nevada Specifications: Nevada Department of Transportation Standard Specifications for Road and Bridge Construction 2014 Edition or latest Edition and applicable Pull Sheets.

Other Publications

The following documents form a part of this description to the extent specified herein. Unless a specific issue is identified, the issue in effect on date for invitation for bids or request for proposal shall apply

American Society for Testing and Materials (ASTM) Standards

D 1155 - Standard Test Method for Roundness of Glass Spheres D 1214 - Standard Test Method for Sieve Analysis of Glass Spheres

Requirements

Quality Assurance Control: The beads shall be segregated into maximum lots of 20,000 Kg (44,000 lb). The manufacturer shall test each lot for compliance to the specification requirements listed in Table II, entitled ‘Test Methods”. Lot analysis shall be retained for at least two (2) years.

Appearance: When tested as specified in Paragraph 4.3, the glass spheres shall be colorless; clean; transparent; free from milkiness or excessive air bubbles; and essentially clean from surface scarring or scratching.

Roundness: When tested as specified in Paragraph 4.4, the traffic beads shall have a minimum of eighty percent (80%) rounds overall.

Embedment Coating: When tested as specified in Paragraph 4.5, the traffic beads shall be embedment coated with a material, which enhances adherence of these beads in the waterborne traffic paint.

Specific Gravity: When tested as specified in Paragraph 4.6, the traffic beads shall have a specific gravity of two and forty-four one-hundredths (2.44) to two and fifty-six one hundredths (2.56) at twenty-five degrees Centigrade (25°C) (seventy-seven degrees Fahrenheit (77°F)).

Visual Requirements:

Referee Method-When tested as specified in Paragraph 4.3, the glass beads shall have a minimum of eighty percent (80%) rounds and shall satisfy the specification requirements described in Paragraph 3.2 - Appearance.

Alternate Method- When tested as specified in Paragraph 4.4, the traffic beads shall comply with the specification requirements described in Paragraph 3.3 Roundness Moisture Content: When tested as specified in Paragraph 4.7 the moisture content shall not exceed one one-hundredth percent (0.01%).

Moisture Resistance: When tested as specified in Paragraph 4.8, the traffic beads shall flow freely with minimal resistance Refractive Index: When tested as specified in Paragraph 4.9, the Index of Refraction shall be a minimum of one and five-tenths (1.5).

Reduction in Luster or `Reflective Power: When tested as specified in Paragraph 4.10, the reduction in luster or reflective power of the beads shall be minimal.

Gradation: The traffic beads delivered shall comply with the gradation requirements specified in Table I, entitled “Gradation Requirements for Type A Traffic Beads.”

Table I Gradation Requirements for Type A Traffic Beads US Standard Sieve Size:

(In)

(By Mass)

HEALTH AND ENVIRONMENTAL

Provide certified independent laboratory test results verifying the glass used for traffic beads do not contain heavy metals in excess of two hundred parts per million (200 ppm) of Arsenic (As) or Lead (Pb), determined in accordance with Environmental Protection Agency (EPA) Test Methods 3052, 6010B, or 6010C Provide certified laboratory test results for every fifty thousand pounds (50,000 lbs.) of glass beads or portion thereof Provide a unique numbering system to identify each batch of beads and related test results. Submit test results with each load of glass beads delivered to Nevada Department of Transportation (NDOT) District locations.

DELIVERY

All deliveries shall be on a solidly constructed 42-inch x 42-inch Winged Pallet able to withstand the load. Load packaging (see below) shall be centered upon pallet.

All deliveries shall be by flatbed truck only

GLASS BEAD PACKAGING

When product delivery requirements call for “supersacks”, delivery shall be in 38-inch x 38-inch bag constructed of 220 GSM coated polypropylene, UV treated fabric with internal baffles of 220 GSM coated fabric.

Each bag shall be equipped with 4/2-inch x 10-inch polypropylene lifting loops, one at each corner with loops sewn from top to bottom of main seam. All seams shall be perimeter banded and sift-proofed with 2-sided filler cord.

Inlet spout shall be 20-inch diameter with web tie. Outlet spout shall be 10-inch diameter, iris style outer closure with web tie.

Methods of Sampling and Testing

SAMPLE COLLECTION PROCEDURES

NEVADA DEPARTMENT OF TRANSPORTATION (“The Department”) shall randomly sample each lot of beads upon delivery.

One 3-lb sample per lot shall be taken and delivered to the Progress Laboratory in the District or to the Headquarters Laboratory in Carson City, Nevada for testing.

The beads shall not be used until tested.

Any lot that fails any of the testing procedures will be returned to the Manufacturer at no cost to “The Department.”

“The Department” reserves the right to have an inspector present to observe the manufacturing process.

“The Department” reserves the right to require manufacturer’s reports of batches delivered to field locations.

TEST METHODS

Samples shall be tested as specified in Table II, entitled “Test Methods.”

Unless otherwise specified, tests shall be performed at standard conditions, which are twenty-five degrees with two degrees Centigrade tolerance (25°C ± 2°C) (seventy-seven degrees Fahrenheit with nine degrees Fahrenheit tolerance (77°F ± 9°F) and fifty percent Relative Humidity with five percent tolerance (50% ± 5% Relative Humidity).

Test results shall be evaluated for conformance to specification requirements.

Traffic Beads represented by the sample shall be unacceptable if any test result does not conform to the corresponding requirements.

TABLE II - TEST METHODS

Traffic Beads Characteristics

Requirement Paragraph

ASTM

Method

Test Paragraph

Appearance

Pour some of the sample remaining after splitting for Sieve Analysis – Gradation on a strip of transparent tape.

Place the bead-laden tape under a Microfiche Reader.

Count the number of Traffic Beads in ten (10) fractions for a total of one hundred (100) beads counted.

Count the number of traffic beads in each 10-bead fraction that failed to meet specification requirements for roundness color transparency that are milky contain excessive air bubbles surface scarring or scratching angular particles.

Subtract the traffic beads which failed to meet specification requirements from the total traffic beads counted.

Record this number as the percentage of traffic beads meeting Visual Requirements.

ROUNDNESS

Beads shall be tested using ASTM D 1155 or an approved equal

EMBEDMENT COATING

The traffic beads shall be tested for embedment coating by any approved method using Dansyl Chloride.

SPECIFIC GRAVITY

Testing for Specific Gravity

Dry one hundred grams (100.000 g) of traffic beads in an oven at one hundred five degrees Centigrade with two degrees Centigrade tolerance (105°C ± 2°C) (two hundred twenty-one degrees Fahrenheit with seven degrees Fahrenheit tolerance (221°F ± 7°F)).

Cool the sample in a desiccator. Reheat the sample for one Hour (1 Hr.) in the oven, cool in a desiccator and reweigh. Repeat the heating and cooling of the sample until constant weight is achieved.

Constant weight is achieved when the difference of two (2) successive weightings differs by less than 10 milligrams (10 mg (0.010 g)).

Weigh a sixty-gram (60.000-g) test sample from the original one hundred-gram (100-g) sample cooled to constant weight in a desiccator.

Slowly pour the test sample into a one hundred-milliliter (100-mL) graduated cylinder containing fifty milliliters (50 mL) of reagent-grade Xylene.

Make certain that air is not entrapped among the beads.

Calculate Specific Gravity as follows-

M= Mass of Sample; V= Total Volume (Xylene Level after Addition) Specific Gravity = M/(V-50) Evaluate for compliance

MOISTURE CONTENT

The moisture content shall not exceed one one-hundredth (0.01) percent when tested at one hundred five degrees Centigrade (105°C) (two hundred twenty-one degrees Fahrenheit (221°F)) for 3 hours Moisture Resistance:

Test for moisture resistance by placing 900 g (2 lb.) of beads in reserved in an unbleached, washed cotton bag approximately 260 mm by 430 mm (10" by 17") (thread count 48 by 48, per 25 mm(2” by 2", per 1").

Then immerse the sample in distilled water at room temperature (21°-22°C) (70°-72°F)) for 30 seconds or until the spheres are completely covered.

Then remove the sample and remove excess water by twisting the neck of the bag.

After 2 hours, with the bag suspended at room temperature, thoroughly mix the sample and transfer it to a clean, dry funnel (150 mm top diameter), 120 mm depth to 10 mm stem inside diameter).

The entire sample shall flow through the funnel with light tapping of the stem permissible only to initiate flow.

REFRACTIVE INDEX

The beads shall be tested by the liquid immersion method (Becke Line Method or an approved equal) at a temperature of twenty-five degrees Centigrade with five degrees Centigrade tolerance (25°C ± 5 (seventy-seven degrees Fahrenheit with a nine degrees Fahrenheit tolerance (77°F ± 9°F)).

REDUCTION IN LUSTER OR REFLECTIVE POWER

After refluxing a fifty-gram (50-gm) sample of beads in a Soxhlet Extractor for eight (8) hours with distilled water the reduction in luster or reflective power of the beads shall be minimal.

Gradation- Gradation shall be tested according to ASTM D 1214 or an approved equal

TRAFFIC BEAD DELIVERIES

Traffic Beads to be delivered to the following locations in 1800 or 2400-pound bags.

Size and type of delivery bags will be specified at time of order.

Provide delivery bags according to the requirements of each location.

Contact the Department Maintenance staff at each location to determine the type of delivery bag required.

Delivery bags known as “supersacks” may be required that can be hoisted by forklift with top and bottom closures, as delineated in Section 5.4, to allow deposition of beads in storage containers by gravity feed, vacuum transfer or other method.

Packaging will not be accepted that leads to spillage or aeration of the beads during transfer process.

Quantities specified are estimates only for bid purposes, actual quantities may vary by type and not all types specified may be ordered.

Revised 2024-10 Page 2 of 2

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