Township Council Meeting — Packet

c. Turn on the Overlay Tester. Turn on the computer and wait to ensure communication between the computer and the Overlay Tester occurs. Turn on the hydraulic pump using the Overlay Tester’s software. Allow the pump to warm up for a minimum of 20 minutes. Turn the machine to load control mode to mount the sample assembly. 5, Mounting Specimen Assembly to Testing Device. Enter the required test information into the Overlay Tester software for the specimen to be tested. a. Mount the specimen assembly onto the machine according to the manufacturer's instructions and the following procedural steps. 4. Clean the bottom of the base plates and the top of the testing machine blocks before placing the specimen assembly into the blocks. If all four surfaces are not clean, damage may occur to the machine, the specimen, or the base plates when tightening the base plates. 2. Apply 15 Ib-in of torque for each screw when fastening the base plates to the machine. 6. Testing Specimen. a. b. c, Perform testing at a constant temperature recommended by the New Jersey Department of Transportation for the mixture in question. This is typically either 59 °F (15 °C) or 77 °F (25 *C); Note 3 — Ensure the trimmed specimen has also reached the constant temperature required. Start the test by enabling the start button on the computer control program. Perform testing until a 93% reduction or more of the maximum load measured from the first opening cycle occurs. If 93% is not reached, run the test until a minimum of 1,200 cycles. After the test is complete, remove the specimen assembly from the Overlay Tester machine blocks. D. Report. Include the following items in the report: ENO son> Date and time molded or cored. NJDOT mixture identification. Trimmed specimen density. Starting Load. Final Load. Percent decline (or reduction) in Load. Number of cycles until failure. Test Temperature NJDOT B-11- DETERMINING GRADATION OF CRUMB RUBBER FOR ASPHALT MODIFICATION A. Scope. This method is used to determine the gradation of the crumb rubber for asphalt-rubber binder B. Apparatus. Use the following apparatus: Pe Oven capable of maintaining a temperature of 140 + 10 °F for drying sample to a constant weight. Rubber balls having a weight of 8.5 + 0.5 grams, a diameter of 24.5 + 0.5mm, and a Shore Durometer “A” hardness of 50 + 5 per ASTM Designation D 224 No. 8,

°F for drying sample to a constant weight. Rubber balls having a weight of 8.5 + 0.5 grams, a diameter of 24.5 + 0.5mm, and a Shore Durometer “A” hardness of 50 + 5 per ASTM Designation D 224 No. 8, 16, 30, 50, 100, and 200 sieves conforming to AASHTO M 92. Mechanical sieve shaker conforming to AASHTO T 27. Balance conforming to AASHTO M 231 and having a minimum capatownship of 100 grams with a precision of 0.1 gram. 62