La. Admin. Code tit. 73 § III-303

Current through Register Vol. 50, No. 8, August 20, 2024

Section III-303 - Minimum Standards for Striping

A. Temporary Pavement Markings

1. Temporary Tape. Temporary tape shall comply with ASTM D 4592, Type I (removable) or Type II (non-removable) and shall be an approved product listed in QPL-60.

2. Painted Stripe. Paint shall be an approved traffic paint complying with Subsection 1015.12 of the Louisiana Standard Specifications for Roads and Bridges. Glass beads for drop-on application shall comply with Subsection 1015.13 of the Louisiana Standard Specifications for Roads and Bridges.

3. Temporary Raised Pavement Markings for Asphaltic Surface Treatment. Temporary raised pavement markers for asphaltic surface treatment shall be flexible reflective tabs having a nominal width of 4 inches (10 cm). The markers shall be yellow with amber reflective area on both sides. The body of the marker shall consist of a base and vertical wall made of polyurethane or other approved material and shall be capable of maintaining a reasonable vertical position after installation. The initial minimum reflectivity at an entrance angle of -4 degrees and an observation angle of 0.2 degrees shall be 230 mcd/lx when measured in accordance with ASTM E 810.

a. The reflective material shall be protected with an easily removable cover of heat resistant material capable of withstanding and protecting the reflective material from the application of asphalt at temperatures exceeding 325 ° F (160 ° C).

b. The markers shall be an approved product listed in Q PL 74.

B. Traffic Paint. The contractor shall have the option of furnishing either alkyd traffic paint or water-borne traffic paint; however, the same type paint shall be used throughout the project. Each paint container shall bear a label with the name and address of manufacturer, trade name or trade-mark, type of paint, number of gallons, batch number and date of manufacture. Paints shall be approved products listed in Q PL 36; shall show no excessive settling, caking or increase in viscosity during six months of storage, and shall be readily stirred to a suitable consistency for standard spray gun application. An infrared curve shall be generated in accordance with DOTD TR 610 and compared with the standard curve made during the initial qualification process.

1. Alkyd Traffic Paint. This material shall be a rapid-setting compound suitable for use with hot application equipment. The material shall meet the requirements of Table 1015-11.

Table 1015-11 Alkyd Traffic Paint Physical Properties
Property	Test Method	Requirements
		Min	Max
Weight, kg/L	ASTM D 1475	1.5	---
Viscosity @ 25 ° C, Krebs Units	ASTM D 562	85	115
Dry to No Pick Up, s	ASTM D 711	---	180
Directional Reflectance, % White Yellow	ASTM E 97	80 50	--- ---
Bleeding	Fed. Spec. TT-P-115	Pass
Total Solids, % by mass	ASTM D 1644, Method A	70	---
Film Shrinkage	1	Pass
Hiding Power	2	Pass
Pigment, %	ASTM D 2371	50	55
Nonvolatiles in Vehicle, % by mass	ASTM D 215	35	---
Flexibility	Fed. Spec. TT-P-1952	Pass
Pigment Composition	3	Pass

¹Film Shrinkage: With a film applicator, cast a wet film with a thickness of 30 mils (750 [MICRO]m) over a smooth glass plate. Allow sample to cure at room condition for four to five hours. Using a micrometer, measure the plate thickness before the film is cast using five measurements to obtain an average. The cured film shall have a minimum thickness of 12 mils (300 [MICRO]m).

²Hiding Power: The paint shall have a wet hiding power of at least 350 square feet per gallon (8.6 m2/L). The compound shall have sufficient hiding power to cover any pavement when applied at a wet film thickness of 15 mils (375 [MICRO]m).

³Pigment Composition: White paint shall contain at least 1.5 pounds (180 g) of titanium dioxide (Ti02) pigment per gallon (L) as determined using DOTD TR 523 with at least 92 percent Ti02content. The Ti02 shall comply with ASTM D 476. Yellow paint shall contain at least 1.3 pounds (160 g) of medium chrome yellow pigment per gallon (L) as determined using DOTDTR 523. Medium chrome yellow pigment shall comply with ASTM D 211, Type III.

2. Water Borne Traffic Paint. This material shall be a rapid setting waterborne compound suitable for use with hot application equipment. The material shall meet the requirements of Table 1015-12.

Table 1015-12 Water Borne Traffic Paint Physical Properties
Property	Test Method	Requirements Min Max
Weight, kg/L	ASTM D 1475	1.5	---
Viscosity, at 25 ° .C Krebs Units	ASTM D 562	75	90
Drying to No Pickup, min.	ASTM D 711	---	10
Dry through, min.	ASTM D 1640	---	20
Volume Solids, %	---	58	---
Total Solids, % by mass	ASTM D 2369	70	---
Pigment, % by mass	ASTM D 3723	45	55
Nonvolatile Vehicle, % by mass	Fed. Test 141B	40	---
Bleed Ratio	Fed. Spec. TT-P-1952	0.96	---
Daylight Reflectance, % White Yellow	Fed. Test 141B	85 54	--- ---
Hiding Power (Contrast Ratio) at 250 [MICRO]m	Fed. Test 141B	0.96	---
Flexibility	Fed. Spec. TT-P-1952	Pass
Drying Time, min.	1	---	3
Fineness of Grind	ASTM D 1210	3	---
Freeze-Thaw	ASTM D 2243	Pass
Heat Stability	Fed. Spec. TT-P-1952	Pass
Color	2	Pass
Volatile Organic Compounds (g/L)	---	---	150
Pigment Composition	3	Pass

¹Drying Time to No Track- Paint applied at 15 mils (375 [MICRO]m) wet on the road surface with paint heated to 120-150 ° F (50-65 ° C) shall not show tracking when a standard size automobile crosses in a passing maneuver at three minutes.

²Color-Yellow paint shall comply with the requirements of Table 1015-13 when tested in accordance with ASTM E 1349. White shall be a clean, bright, untinted binder.

³The white paint shall contain a minimum of 1.0pound per gallon (120 g/L) of titanium dioxide (Ti02) as determined using DOTD TR 523. The titanium dioxide shall comply with ASTM D 476.

Table 1015-13 Water Borne Traffic Paint Color Specification Limits (Daytime)
Color	1		2		3		4
	x	y	x	y	x	y	x	y
Yellow	0.4756	0.4517	0.4985	0.4779	0.5222	0.4542	0.4919	0.4354
(The four pairs of chromaticity coordinates determine the acceptable color in terms of the CIE 1931 Standard Colorimetric System measured with Standard Illuminant C.)

C. Large Embedment Coated Glass Beads for Pavement Markings. Large embedment coated glass beads for use with painted traffic striping and flat thermoplastic striping shall be transparent, clean, colorless glass, smooth and spherically shaped, free from milkiness, pits, or excessive air bubbles and conform to the specific requirements for the class designated. The beads shall be non-flotation, embedment coated and conform to the following specific requirements.

1. Gradation. The testing for gradation of the beads shall be in accordance with ASTM D 1214 and shall meet the gradation requirements specified below.

a. Painted Traffic Striping. Glass beads for painted traffic striping shall meet the gradation requirements of Table 1015-14.

Table 1015-14 Gradation of Large Embedment Coated Glass Beads for Painted Traffic Striping
U.S. Sieve (Metric Sieve)	Percent Retained
No. 12 (1.7 mm)	0
No. 14 (1.4 mm)	0-5
No. 16 (1.18 mm)	5-20
No. 18 (1.00 mm)	40-80
No. 20 (850 [MICRO]m)	10-40
No. 25 (710 [MICRO]m)	0-5
PAN	0-2

b. Flat Profile Thermoplastic Striping. Drop-on beads for flat profile thermoplastic striping shall meet the gradation requirements of Table 1015-15 as determined by the thickness of the striping.

Table 1015-15 Gradation of Embedment Coated Glass Beads for Flat Profile Thermoplastic Striping
Thickness	Number of Bead Drops	Application #1	Application #2
40 mils	Single Drop	See Table1015-14	N/A
90 mils or greater	Double Drop	See Table1015-16	AASHTO M 247 Type I

Table 1015-16 Gradation of Large Embedment Coated Glass Beads for First Drop on Flat Thermoplastic Striping
U.S. Sieve (Metric Sieve)	Percent Retained
No. 10 (2.0 mm)	0
No. 12 (1.7 mm)	0-5
No. 14 (1.4 mm)	5-20
No. 16 (1.18 mm)	40-80
No. 18 (1.00 mm)	10-40
No. 20 (850 [MICRO]m)	0-5
PAN	0-2

2. Roundness. The beads shall have a minimum of 80 percent rounds per screen for the two highest sieve quantities. The remaining sieve fractions shall have no less than 75 percent rounds as determined by microscopic examination.

3. Angular Particles. The beads shall have no more than 3 percent angular particles per screen.

4. Refractive Index. The beads shall have a refractive index of 1.50 to 1.52 when tested by the liquid immersion method.

5. Embedment Coating. The large beads for thermoplastic striping shall be coated with an adhesion assuring coating. The smaller AASHTO M247 Type I beads shall be coated to provide free flowing characteristics when tested in accordance with AASHTO M247 Section 4.4 1. and assure adhesion. Glass beads shall be properly coated and conform to the requirements when tested as described in DOTD TR 530 Determination of Embedment Coating on Large Embedment Coated Glass Beads for Pavement Markings.

6. Packaging and Marking. The beads shall be packaged in moisture proofed containers. Each container shall be stamped with the following information: Name and address of manufacturer, shipping point, trademark or name, the wording "Large Embedment Coated Glass Beads," class, weight, lot number and the month and year of manufacture. The container for the AASHTO M 247 Type I beads shall be similarly stamped except that the wording shall be "Glass Beads."

La. Admin. Code tit. 73, § III-303

Promulgated by the Department of Transportation and Development, Office of Weights, Measures and Standards, LR 24:705 (April 1998), amended LR 30:504 (March 2004).

AUTHORITY NOTE: Promulgated in accordance with R.S. 48:35.