“GENERAL ISSUES IN ASPHALT TECHNOLOGY” 2006 Meeting of TRB Committee AFK10 RENAISSANCE AIRPORT HOTEL PHILADELPHIA, PENNSYLVANIA APRIL 24 -26, 2006.

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Presentation transcript:

“GENERAL ISSUES IN ASPHALT TECHNOLOGY” 2006 Meeting of TRB Committee AFK10 RENAISSANCE AIRPORT HOTEL PHILADELPHIA, PENNSYLVANIA APRIL , 2006

REGIONAL ISSUES & TOPICS PENNDOT PERSPECTIVE BITUMINOUS TESTING ENGINEER DEAN A. MAURER P.E.

GENERAL A.P.Q.I.T.F. * PENNDOT CENTRAL & DISTRICT * FHWA DIVISION * P.A.P.A.

RECYCLING HIGHER % R.A.P. * L.T. AGING >> ++ VOLUMETRIC ANALYSIS, T283, F.T. / Binder Ratio WASTE RECYCLABLES(TIRES/SHINGLES) * CRM – 12.5mm SMA/4.75mm SMA / 12.5mm SUPERPAVE (Vestenamer) * RECYCLED ASPHALT SHINGLES(RAS) POST-MANUFACTURE VS. CONSUMER

BINDER MODIFICATION & TEST PROCEDURES ACID MODIFICATION (P.P.A.) ELASTIC RECOVERY (E.R.) VS. MULTIPLE STRESS CREEP RECOVERY TEST (MSCR) INTERMEDIATE TEMPERATURE TEST (DURABILITY VS. FATIQUE) RELY ON E.T.G. GUIDANCE

CONSTRUCTION SPECs (PAV’T ACCEPTANCE/PERFORMANCE) WHAT TESTS?/ HOW MANY?/ BY WHO? PWL VS. LOCAL ACCEPTANCE WARRANTIES ? (SHORT-TERM ONLY) INTELLIGENT COMPACTION (P.F. 954) LONGITUDINAL JOINT PERFORMANCE SMA vs. SUPERPAVE > 30million ESALs WARM–MIX ? (WATCH & WAIT)

LAB MIX PERFORMANCE EVALUATION DURABILITY EVALUATION *Tensile Strength & Permeability * VARIABLES (AGING, MOISTURE CONDITIONING, TEMPERATURE, VOIDS, CYCLING) RUTTING not PRIMARY FAILURE MODE *SIMPLER and LESS COSTLY

THANK YOU ! QUESTIONS ?