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LLP HMA Reclaimed Asphalt Pavement ( RAP)

LLP HMA Reclaimed Asphalt Pavement ( RAP). Pre-Bid Meeting District 4 Oakland , CA September 14, 2012 Peter Vacura Chief, Office of Asphalt Pavement Division of Maintenance. Overview. Required Use of RAP in LLP HMA Mix Design Requirements for LLP HMA with RAP LLP HMA RAP Source

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LLP HMA Reclaimed Asphalt Pavement ( RAP)

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  1. LLP HMAReclaimed Asphalt Pavement ( RAP) Pre-Bid Meeting District 4 Oakland , CA September 14, 2012 Peter Vacura Chief, Office of Asphalt Pavement Division of Maintenance

  2. Overview • Required Use of RAP in LLP HMA • Mix Design Requirements for LLP HMA with RAP • LLP HMA RAP Source • Processed RAP Requirements • RAP Quality Control

  3. Required Use of RAP in LLP HMA • You must use 25% RAP in HMA (25% RAP, Long Life) • You may use up to 15% RAP in HMA (15% Max RAP, Long Life) • The provisions in Section 4-1.035B, "Value Engineering Change Proposal," of the Standard Specifications do not apply to HMA (15% Max RAP, Long life) or HMA (25% RAP, Long Life).

  4. Mix Design Requirements For LLP HMA With RAP • For the mix design of HMA (25% RAP, Long Life), perform Laboratory Procedures (LP-9) using 25% RAP, on combinations of aggregate gradations, RAP, and asphalt binder content. • For the mix design of HMA (15% RAP, Long Life), perform Laboratory Procedures (LP-9) using 15% RAP.

  5. LLP HMA RAP Source • You may sample existing asphalt concrete from the project site by coring, milling, or grinding. • RAP for HMA (25% RAP, Long Life) must come from the areas shown on the plans.

  6. RAP Specification • JMF Design: RAP • 25% +/- 1% at JMF Design, +/-3% during production • RAP fractionated into: • + #4 Sieve • - #4 Sieve • Allowable stockpile variance, binder content: +/-2.0% • Sieve correction factors & binder content • Binder content* ASTM 2172 ----- • Grading RAP ---- CT 202

  7. Specification Changes • JMF Design: RAP • Rice Specific Gravity AASHTO T209 CT309 • Allowable stockpile variance Gmm= +/-0.060 • Ignition oven* AASHTO T309 CT382 * Requires 3 samples

  8. Processed RAP • Processed RAP must be fractionated into two sizes, a coarse fraction (1/2 to 1 inch) and a fine fraction (<1/2 inch). • Each processed RAP dedicated pile must be isolated from all other materials. • Store RAP in conical stockpile. • RAP must not be agglomerated or congeal in large piles.

  9. RAP Quality Control • 39-1.04E Reclaimed Asphalt Pavement • Perform RAP quality control testing each day. • Sample RAP once daily and determine the RAP aggregate gradation under Laboratory Procedure LP-9 and submit the results to the Engineer in writing with the combined aggregate gradation.

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