AAPA 2010 Study Tour – Accelerated Pavement Testing & Equipment Observations and Recommendations Accelerated Pavement Testing & Equipment

AAPA 2010 Study Tour – Accelerated Pavement Testing & Equipment UC Pavement Research Centre UCPRCHVS with climate control* UCPRCWheel loading test section* UCPRCTest section with HVS in the background* UCPRCIndoor testing facility at Davis* *Photos: MG Henderson

AAPA 2010 Study Tour – Accelerated Pavement Testing & Equipment R&D Programs UCPRC areas of research  Pavement Preservation  Quiet Pavements  Pavement Construction Practices  Mechanistic-Empirical Design  Long-life Pavements  Pavement Recycling and Sustainability  Development of a Caltrans Pavement Management System o Pavement Smoothness

AAPA 2010 Study Tour – Accelerated Pavement Testing & Equipment Turner-Fairbank Highway Research Centre

AAPA 2010 Study Tour – Accelerated Pavement Testing & Equipment R&D Programs TFHRC strategies  Durable Infrastructure Systems  Performance-Based Specifications  Comprehensive and Integrated Infrastructure Asset Management  Long-Term Infrastructure Performance  Environmentally Sensitive Highway Infrastructure o Accelerated Highway Construction

AAPA 2010 Study Tour – Accelerated Pavement Testing & Equipment NCAT - National Centre for Asphalt Technology

AAPA 2010 Study Tour – Accelerated Pavement Testing & Equipment National Centre for Asphalt Technology

AAPA 2010 Study Tour – Accelerated Pavement Testing & Equipment R&D Programs NCAT focus areas for research are:  Sustainable pavements  M-E pavement design calibration  Perpetual pavement design  Porous friction courses mixes  Lab tests for predicting performance  Pavement friction o Pavement reflectivity

AAPA 2010 Study Tour – Accelerated Pavement Testing & Equipment NCAT current research objectives Performance Graded Binder validation Perpetual pavement concepts M-E design validation/ calibration Durability of coarse gravel mix Performance of various o Asphalt gradings including Superpave o Polymer modified binders o Warm Mix additives in mixes o Types of aggregates used in SMA o Drainable mixes o RAP asphalts

AAPA 2010 Study Tour – Accelerated Pavement Testing & Equipment Tour of Laboratories University of California Pavement Research Center (UCPRC) Federal Highway Administration Turner- Fairbank Highway Research Centre (FHWA) National Center for Asphalt Technology (NCAT)

AAPA 2010 Study Tour – Accelerated Pavement Testing & Equipment Simple Shear Tester

AAPA 2010 Study Tour – Accelerated Pavement Testing & Equipment Gyratory Compactor

AAPA 2010 Study Tour – Accelerated Pavement Testing & Equipment Rolling Wheel Compaction

AAPA 2010 Study Tour – Accelerated Pavement Testing & Equipment 4 Point Bending Fatigue Test

AAPA 2010 Study Tour – Accelerated Pavement Testing & Equipment Hamburg Wheel Track Test

AAPA 2010 Study Tour – Accelerated Pavement Testing & Equipment Asphalt Pavement Analyser Rut test on cores

AAPA 2010 Study Tour – Accelerated Pavement Testing & Equipment AMPT - Asphalt Mix Performance Tester

AAPA 2010 Study Tour – Accelerated Pavement Testing & Equipment AMPT AMPT measures o Dynamic modulus o Flow number o Flow time 1. Place sample in chamber 2. Mount strain transducers 3. Commence testing

AAPA 2010 Study Tour – Accelerated Pavement Testing & Equipment Device to test bond between layers Layer bond shear strength test

AAPA 2010 Study Tour – Accelerated Pavement Testing & Equipment 1.APT demonstrated as a valuable tool to obtain research results within short time frames. 2.Means to rapidly calibrate design models accommodating new concepts (FEL) and varying material types allowing early adoption of cost effective solutions. Observations – APT&E

AAPA 2010 Study Tour – Accelerated Pavement Testing & Equipment 3.Facility cost is high to establish & operate but results provide major financial benefits in selection and design of expensive pavements 4.Success achieved through collaborative research effort between industry, test equipment & materials suppliers, road authorities, consultants and academia. Funds drawn from authorities and product developers. Observations – APT&E

AAPA 2010 Study Tour – Accelerated Pavement Testing & Equipment 1.Stronger relationship be established between Australian APT and United States APT groups. 2.Materials should be tested by NCAT for Accelerated Pavement Testing to calibrate USA performance data to local pavements and environmental effects. 3.Expand APT in AU to understand performance of lighter pavement structures for higher performance & higher mass vehicles. Recommendations – APT&E

AAPA 2010 Study Tour – Accelerated Pavement Testing & Equipment 4.Promote greater participation by industry by providing local benefits from APT in advanced materials development opportunities. 5.Embark on a program to link the field and laboratory engineering related performance data through the use of up-to-date test equipment. Recommendations – APT&E