810GEOTEXTILES

683

With Special Acceptance Requirements" Manual. Refer to Subarticle 106.01(f) and ALDOT-355 concerning this list. GEOTEXTILES

810.01Geotextile Filters

Geotextile filters shall meet the appropriate chemical and physical requirements of AASHTO M 288 for the application for which the material is to be used. The Department has established a list of acceptable Geotextiles. Only the materials on this list shall be furnished for use. This list, List II-3, is given in the "Materials, Sources, and Devices With Special Acceptance Requirements" Manual. Information concerning this list is given in Subarticle 106.01(f) and ALDOT-355. Geotextile rolls shall be furnished with a suitable wrapping for protection against moisture and extended ultraviolet exposure prior to placement. Each roll shall be labeled or tagged to provide product identification sufficient for inventory and quality control purposes. Rolls shall be stored in a manner which protects them from the elements. If stored outdoors, they shall be elevated and protected with a waterproof cover. The geotextile shall be formed in widths of not less than 6 feet {2 m}. Sheets of geotextile may be sewn together with thread of a material meeting the chemical requirements given for the plastic yarn to form filter widths as required. The sheets of geotextile shall be sewn together at the point of manufacture or another approved location. POLYMER ADDITIVES FOR ASPHALT MATERIALS

811.01General

Any polymer not specifically addressed in this Section shall not be used. Variations in composition of polymers listed in this Section will also be considered, if requested in writing to the Materials and Tests Engineer. The use of any polymer shall require the submittal of a written certification to the Materials and Tests Engineer from the manufacturer showing test results for physical properties of the material including, as a minimum, polymer types, polymer percentages, percentage of any cross linking agent and specific gravity. The manufacturer shall also submit a procedure for incorporating the polymer into the asphalt material for actual production and laboratory blending, which would include blending procedures, desired temperatures, duration of blending, etc. A sample of the bituminous material along with an infrared trace using ALDOT 408 procedure or AASHTO T 302 for emulsions showing the styrene and butadiene peaks and percentage of polymer shall also be submitted by the refinery to the Department for laboratory evaluation prior to use. This submittal shall be made annually or upon request by the Department or if the manufacturer changes polymer sources. Field blends of emulsions shall not require an FTIR trace.

811.02Styrene Butadiene Rubber (SBR) Latex for Hot Mix Asphalt

The latex to be used shall be unvulcanized styrene butadiene rubber in liquid latex form. A sample of the asphalt binder at the appropriate polymer loading along with an infrared trace showing the styrene and butadiene peaks shall be submitted to the Department for laboratory evaluation semi-annually or if the manufacturer changes polymer sources. The manufacturer of the SBR latex shall provide a written certification showing test results for total rubber solids, percent styrene and butadiene monomer, ash content, and viscosity. The test results shall comply with the following minimum requirements: Total Solids, % by weight {mass} (min.) 67 Monomer Ratio Butadiene/Styrene, % 75/25 ± 3 Brookfield, Viscosity, RVT #3 Spindle, 20 rpm 500-2000 Total weight per gallon {mass per liter, kg} 7.7 – 8.0 {3.5 - 3.6} Total Ash (max.), % of Total Rubber Solids, ASTM D 297 3.5