1. Crumb Rubber Crack Sealant will be composed of a mixture of asphalt and crumb rubber blended together by the manufacturer to produce a homogeneous mixture when melted, the sealer does not separate or settle, and uniform consistency suitable for filling joints and cracks without inclusion of large air holes or discontinuities. Material will be provided in boxless meltable packaging weighing no greater than 50 lb. [23 kg]. The following data will be clearly printed on each filled container: material name, manufacturer’s name, brand name, weight, batch number, and maximum heating temperature recommended by the manufacturer. A. The crack sealant must meet the requirements of ASTM D 6690, Type I Modified with the following physical property requirements: (1) Recycled rubber, mass, ≥ 18% of asphaltic components, minimum…… 18 (2) Cone Penetration, 25°C (77°F), maximum............................................. 90 (3) Bond Test, 50% extension, @-18°C (0°F) .............................. Pass 5 cycles (4) Flow, 60°C (140°F), mm, maximum.......................................................... 5 (5) Resilience, 25°C (77°F), minimum...................................................... ≥ 40% (6) Softening Point, ≥ 82°C (180°F), minimum............................................. 82
