Four Point Bending Proceedings of the Third Conference on Four-point Bending, Davis, Ca, USA, 17-18 Septmeber 2012

Cracking is recognized as one of the main causes of pavement deterioration, and is the primary cause of the need for maintenance and rehabilitation. Researchers around the world are working on the problem of cracking in asphalt pavements, with the goal of developing better understanding of the mechanics of cracking, creating test methods for assessing the risk of cracking for different materials and designs, and implementing these results into improved design methods and specifications. This Third Conference on Four-point bending held at the University of California, Davis, USA, follows two successful previous conferences, held at the Delft University of Technology, The Netherlands, in 2007, and at the University of Minho, Portugal in 2009. The primary objective of these conferences is to provide an exchange of ideas and experience and to disseminate that knowledge among researchers, government and private agencies and consultants, about the use of the four-point bending test to evaluate stiffness and fatigue resistance of bituminous mixtures. These proceedings include 23 papers from 15 countries that have been subjected to peer review by a scientific committee composed of experts in asphalt materials, design and testing. Themes of the papers cover a range of topics, including modelling of the four-point beam test, applications to mechanistic design, asphaltic materials evaluation, comparisons with other tests and non-asphaltic materials evaluation. Four Point Bending is of interest to academics and professionals interested in pavement engineering.

Preface VConference organization Modeling of the Four Point Beam test A detailed FEM simulation of a 4-point bending test device M. Huurman & A.C. Pronk Description of a procedure for using the Modified Partial Healing model (MPH) in 4PB test in order to determine material parameters A.C. Pronk Assessment of different flexure fatigue failure analysis methods to estimate the number of cycles to failure of asphalt mixtures M.I. Souliman,W.A. Zeiada, K.E. Kaloush & M.S. Mamlouk Investigation into the size effect on four-point bending fatigue tests N. Li, A.A.A. Molenaar, M.F.C. van de Ven, A.C. Pronk & S.Wu Applications to Mechanistic Design Application of four-point bending beam fatigue test for the design and construction of a long-life asphalt concrete rehabilitation project in Northern California V. Mandapaka, I. Basheer, K. Sahasi, P. Vacura, B.W. Tsai, C.L. Monismith, J. Harvey & P. Ullidtz Development of fatigue performance specification and its relation to mechanistic-empirical pavement design using four-point bending beam test results B.-W. Tsai, R.Wu, J.T. Harvey & C.L. Monismith Development of a standard materials library for mechanistic-empirical fatigue and stiffness evaluation L. Popescu, J. Signore, J. Harvey, R.Wu, I. Basheer & J.T. Holland Four point bending beam tests in Arizona and relationship to asphalt binder properties G.B.Way, K.E. Kaloush & J.M.B. Sousa First steps for the perpetual pavement design: Through the analysis of the fatigue life N. Hernandez, J. Hernandez & R. Martinez Asphaltic materials evaluation Fatigue assessment of conventional and highly modified asphalt materials with ASTM and AASHTO standard specifications G.M. Rowe, P. Blankenship & T. Bennert Mechanical characterization of dry asphalt rubber concrete for base layers by means of the four bending points tests C. Maggiore, G. Airey, G. Di Mino, C.M. Di Liberto & A. Collop Impact of air void content on the viscoelastic behavior of hot mix asphalt B. Hofko, R. Blab & M. Mader Fatigue evaluation of reinforced asphalt concrete slabs K.P. Biligiri, S. Said & H. Hakim Influence of recycled asphalt shingles on fatigue properties of asphalt pavements A.A. Cascione & R.C.Williams Flexural fatigue tests and predictions models – tools to investigate SMA mixes with new innovative binder stabilizers J.B. Sousa, I. Ishai & G. Svechinsky Laboratory evaluation of fatigue and flexural stiffness of warm mix asphalt A.N. Mbaraga, K.J. Jenkins & J. Van den Heever Comparisons with other tests Comparison of fatigue properties using 2-point and 4-point bending tests – Czech experience P. Hyzl, M. Varaus, P. Mondschein, J. Valentin & V. Soucek Hungarian experience with different bending devices 2Z. Puchard & A. Gorgenyi Development of quality control test procedure for characterizing fracture properties of asphalt mixtures S. Saadeh, O. Eljairi, B. Kramer & E. Hajj Fatigue resistance: Is it possible having a unique response? C. Maggiore, G. Airey, A. Collop, G. Di Mino, M. Di Liberto & P. Marsac Non-asphaltic materials evaluation A laboratory study of the influence of multiple axle loads on the fatigue performance of a cemented material M.A. Moffatt, G.W. Jameson &W. Young Four point bending tests on cement treated materials G. Gaarkeuken, B.W. Sluer & M.M.J. Jacobs Repeated load flexural testing to characterize lightly stabilized granular materials D.K. Paul & C.T. Gnanendran Author index