740
COMPOSITION OF CLASS 2 and CLASS 2T THERMOPLASTIC (% BY WEIGHT) COMPOSITION VALUE FOR WHITE VALUE FOR YELLOW (Lead Free) VALUE FOR YELLOW (Leaded) TEST METHOD Binder 20.0 % minimum 20.0 % minimum 20.0 % minimum AASHTO T 250 White Pigment TiO2, Type II Rutile 10.0 % minimum - 1.5 % minimum ASTM D 476 Glass Beads
Yellow Pigment, Lead Chromate - N/A 5.0 % minimum * AASHTO T 250 Yellow Pigment, Organic Pigment Yellow 83 - % minimum per manufacturer ** N/A - Calcium Carbonate and Inert Filler (-200 mesh {-75 µm} sieve) 30.0 % maximum 37.5 % maximum 33.5 % maximum ASTM D 1199 * Note: For yellow leaded thermoplastic markings the pigment shall be silica encapsulated lead chromate yellow, containing a minimum of 42 % lead. ** Note: For yellow lead free markings the pigment shall be an organic pigment yellow 83. The lead free yellow thermoplastic material shall contain no more than 100 ppm of lead, cadmium, or hexavalent chromium.
The physical requirements for the thermoplastic shall be in accordance with the following. PHYSICAL REQUIREMENTS OF CLASS 2 and CLASS 2T THERMOPLASTIC (% BY WEIGHT) PROPERTY MAXIMUM MINIMUM TEST METHOD Water Absorption 0.5 % - ASTM D 570 Softening Point - 195 ºF {90 ºC} ASTM D 36 Low Temperature Stress Resistance - Pass AASHTO T 250 Specific Gravity 2.3 1.9 ASTM D 792 Indentation Resistance 75 40 ASTM D 2240* Shore Durometer, A2 Impact Resistance - 1.0 N·m ASTM D 256, Method A Flash Point - 475 ºF {245 ºC} ASTM D 92 *The durometer and panel shall be at 110 ºF {45ºC} with a 4.4 lb {2.0 kg} load applied. Instrument measurement shall be taken after 15 seconds.
856.09Preformed Thermoplastic
Preformed Thermoplastic shall be alkyd based materials. Manufacturers of Class 2 Preformed Thermoplastic shall participate in ALDOT-420, "Acceptance Program for Traffic Marking Materials". Preformed Thermoplastic shall conform to all physical and composition requirements of Class 2 and 2T Thermoplastic with the exception that preformed Thermoplastic shall contain 30% intermix glass beads. TEMPORARY TRAFFIC MARKING MATERIALS 741
TEMPORARY TRAFFIC MARKING MATERIALS
857.01General
The Department has established a list of products approved for use through field tests. These products can be found on List V-3, Temporary Traffic Marking Materials. Information concerning this list is given in Subarticle 106.01(f) and ALDOT-355. The Contractor may choose from any of these products, unless otherwise noted. Although the product durability has been approved, acceptance of the material will still be based on laboratory testing as outlined in List V-3 and the Department's Testing Manual. ROADSIDE IMPROVEMENT MATERIALS
860.01Seed
Seeds shall be certified by an Official Seed Certifying Agency. Seeds shall have been tested within nine months prior to use. Each kind of seed shall be separately packed and delivered to the project in a seed-tight bag. Each bag shall bear a tag or label bearing the seal of the Official Seed Certifying Agency. The analysis of the seed (% pure seed, % germination, date tested, etc.) shall be attached to each bag. Seed shall be at least 95 % pure seed of the required type. Seed for lespedezas shall have a minimum germination rate of 80 %. Seed for all other species shall have a minimum germination rate of 85 %.
Samples of seeds may be taken at any time by the Engineer. Tags or labels that have the analysis of the seeds will be placed with the samples taken by the Engineer. The samples will be stored by the Engineer until a satisfactory stand of grass is obtained. If it is apparent that germination or other problems exist in the establishment of the ground cover, the samples will be submitted to the Alabama Department of Agriculture for testing.
Bermudagrass may be either hulled or unhulled as shown in the table of seed mixes. Sericea Lespedeza shall be hulled and scarified. Annual Lespedeza (Kobe), White Dutch Clover, and Reseeding Crimson Clover shall be hulled.
Coated seeds will not be accepted for planting unless noted otherwise on the plans.
Some seed mixes are designated for "AREAS SUBJECT TO FREQUENT MOWING". Areas subject to frequent mowing are roadway shoulders, medians and front slopes flatter than 3:1 extending 60 feet beyond the edge of pavement or to the toe of the front slope whichever is less. All other areas designated for seeding shall be considered to be "AREAS NOT SUBJECT TO FREQUENT MOWING".
The State of Alabama is divided into three planting zones as shown in the following table:
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