712.15
835 712.15 Geogrid . Furnish biaxial geogrid consisting of punched and drawn polypropylene. Furnish geogrid which is dimensionally stable and able to retain its geometry under construction stresses. Furnish geogrid that is resistant to damage during construction, ultraviolet degradation, and all forms of chemical and biological degradation encountered in the soil on which it is placed. Furnish geogrid that conforms to the properties presented in Table 712.15 -1. Fu rnish geogrid according to the Department’s Qualified Products List. TABLE 712.15 -1 REQUI RED GEOGRID PROPERTIES Property Test Method Required Value[1] Reinforcement Properties Strength at 2% Strain ASTM D 6637 400 lb/ft 5.8 kN/m Minimum Opening Size Direct Measure 0.75 in [2] 19 mm Maximum Opening Size Direct Measure 3.0 in [3] 76 mm Survivability Index Values Ultimate Tensile Strength ASTM D 6637 1300 lb/ft 19.0 kN/m Junction Strength GRI[4] GG2 130 lb 580 N Ultraviolet Stability ASTM D 4355 70 % at 500 hrs
[1] Values, except ultraviolet stability, are Minimum Average Roll Values (MARV), i.e., average value minus two standard deviations). Strength in the machine and cross -machine directions must both meet the required value. [2] Minimum opening size must be ≥ D 50 of aggregate above geogrid to provide interlock. [3] Maximum opening size must be ≤ 2 × D 85 to prevent aggregate from penetrating into the subgrade. [4] GRI – Geosynthetic Research Institute
Follow ASTM D 4873 for ge ogrid labeling, shipment, and storage. Furnish product labels that clearly show the manufacturer’s or supplier’s name, product type, lot number, roll number, manufactured date, and roll dimension. Furnish a notation for each shipping document certifying that the material is in accordance with the manufacturer’s certificate. During shipment and storage, protect the geogrid from direct sunlight, UV deterioration, temperatures greater than 160 ºF (71 ºC), flames including welding sparks, mud, dirt, dust, and debris. Keep the geogrid dry during storage and do not store directly on the ground.
DELINEATOR MATE RIALS
720.01Reflectors . For bridge parapet bracket or bridge rail bracket, furnish
rectangular reflectors that are a minimum size of 3 × 6 inches (75 × 150 mm) and that consist of reflective sheeting according to 730.192 or 730.193 adhered to an aluminum plate. Furnish white, yellow, or red reflectors as specified. Furnish aluminum plate for reflectors according to ASTM B 209 (B 209M), 6061 -T6 with a minimum thickness of 0.060 inch (1.5 mm).