Language used in Asphalt Paving Bid, 2011
Disposal of Demolition Debris and Waste Material
If this contract includes demolition work, the Contractor shall salvage or recycle construction and demolition debris, if feasible and cost-effective. If this contract includes lawn or landscape maintenance, the Contractor shall compost or mulch yard waste material at an approved site, if feasible and cost-effective as required by ORS 279B.225
Recycled Asphalt Shingles
The amount of asphalt cement in the RAP shall be established in the mixture design phase according to ODOT TM 319 and the ODOT Contractor Mix Design Guidelines for Asphalt Concrete or other method if approved by the Engineer.
00745.04 Reclaimed Asphalt Shingles (RAS) - Reclaimed asphalt shingles (RAS) used in the production of new HMAC is optional. Either manufacturer waste (post-manufacturer) RAS or tear-off (post-consumer) RAS may be used. Manufacturer waste RAS is processed asphalt shingle material derived from manufacturer’s shingle scrap. Tear-off RAS is processed asphalt shingle material derived from shingle scrap removed from structures. All percentages are based upon dry weights for calculations.
Process the RAS by grinding at ambient temperature so that 100% of the shredded pieces are less than 1/2 inch in any dimension and that 90% are less than 3/8 inch in any dimension when sampled according to AASHTO T 2 and tested according to AASHTO T 27. Sample and test the processed RAS for gradation at a frequency of one test for every 50 tons of RAS processed. Certify that the RAS does not contain asbestos fibers according to the policies and procedures established by the Department of Environmental Quality. Test deleterious materials according to ODOT TM 226 at a frequency of one test for every 50 tons of deleterious material. The percentage of deleterious materials shall be limited to 3.0%. Test wood particle according to ODOT TM 225 at a frequency of one test for every 50 tons of RAS processed. If fine aggregate will be added as an anti-clumping agent, sample and test processed RAS before adding the fine aggregates.
Fine aggregate meeting the requirements of 00745.10(c) may be added to the RAS in a quantity not to exceed 4% by weight of RAS to keep the material workable and to prevent conglomeration of the shingle particles in the stockpile. Any added fine aggregate for these purposes shall be taken into account in the mix design. Stockpiled RAS shall not be contaminated by dirt or other foreign materials
No more than 5.0% RAS by total weight of mixture will be allowed in HMAC mixtures. In addition, the maximum allowable percentage of asphalt binder replacement shall be restricted to 20.0% for base courses and 15.0% for wearing courses in HMAC containing only RAS.
When RAS is used in conjunction with RAP, no more than 20.0% reclaimed materials by total weight of mixture will be allowed in Level 1, Level 2, and Level 3 HMAC, and no more than 15.0% will be allowed in Level 4 HMAC. In addition, the maximum allowable percentage of binder replacement shall be restricted to 30.0% for base courses and 25.0% for wearing courses.
For HMAC mixtures containing RAS or a combination of RAP and RAS, test the reclaimed materials according to ODOT TM 319 to establish the asphalt content of the reclaimed materials. Develop mixture designs according to the ODOT Contractor Mix Design Guidelines for Asphalt Concrete.