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1 <br />1 <br />The material, when formed .into traffic stripes, must be readily renewable by <br />placing an overlay of new material directly over an old line of the same material. Such new <br />material shall bond itself to the old line in a manner such that no splitting or separation <br />occurs. <br />Overlay stripe thicknesses shall be measured as specified in Section 711 for <br />refurbishing of thermoplastic stripes. <br />971 -6.8 Packing and Marking: The thermoplastic material shall be packed in suitable <br />biodegradable or thermo- degradable containers which will not adhere to the product during <br />shipment and storage. The container of thermoplastic material shall weigh approximately <br />50 lb [23 kg]. The label shall warn the user that the material shall be heated in the range <br />as recommended by the manufacturer. <br />971 -7 Preformed Thermoplastic Materials for Traffic Stripes. <br />971 -7.1 General: Upon cooling to normal pavement temperature, these materials <br />shall produce an adherent, reflective pavement marking capable of resisting deformation by <br />traffic. The manufacturer shall have the option of formulating the material according to his <br />own specifications. However, the requirements delineated in this Specification and <br />Section 711 shall apply regardless of the type of formulation used. The pigment, glass <br />spheres, and filler shall be well dispersed in the resin. The material shall be free from all <br />skins, dirt and foreign objects. <br />971 -7.2 Composition: The preformed thermoplastic shall consist of high quality <br />materials, pigments and glass spheres or other reflective material uniformly distributed <br />throughout their cross - sectional area, with a reflective layer of spheres or other reflective <br />material embedded in the top surface. <br />971 -7.3 Glass Spheres: White and yellow material shall contain no less than 30% <br />glass spheres by weight. The glass spheres shall meet the requirements of 971 -2. <br />971 -7.4 Color: Materials shall meet the performance requirements specified in 971- <br />1 and the following additional requirements. The initial luminance factor, Cap Y, shall not <br />be less than 55. The in- service luminance factor at the end of the three year service life <br />shall not be less than the requirements in ASTM D 6628 when measured outside the wheel <br />paths. <br />971 -7.5 Physical Requirements: Laboratory samples shall be prepared in accordance <br />with ASTM D 4960 and shall meet the following criteria: <br />Property <br />Test Method <br />Minimum <br />Maximum <br />Softening Point <br />ASTM D 36 <br />195 °F [90 °C] <br />- <br />Low Temperature <br />Stress Resistance <br />AASHTO T 250 <br />Pass <br />- <br />Indentation <br />ASTM D 2240* <br />40 <br />75 <br />Resistance <br />Shore Durometer, A2 <br />Impact Resistance <br />ASTM D 256, Method A ** <br />1.0 N•m <br />- <br />*The durometer and panel shall be at 110 °F [45 °C] with a 4.4 lb [2.0 kg] load applied. <br />Instrument measurement shall be taken after 15 seconds. <br />"The test specimen for ASTM D 256 shall be 1 in. x 1 in. x 6 in. and shall not be <br />notched. <br />971 -7.5.1 Retroreflectivity: The white and yellow pavement markings shall <br />attain an initial retroreflectance of not less than 300 mcd /lx•m' and not less than 250 <br />March 2007 01000 -194 03- 4122.D <br />