Effect of Factors Affecting Fracture Energy of Asphalt Concrete at Low Temperature

ABSTRACT Low temperature cracking is considered one of the primary distress modes of asphalt pavements built in northern climates. The detrimental effects of low-temperature cracking of asphalt pavements have motivated new work in fracture testing of hot-mix asphalt (HMA). A comprehensive study was conducted to investigate the effect of various factors on the fracture resistance of asphalt mixtures at low temperatures. The Semi-Circular Bending (SCB) and Disc-Shaped Compact Tension Test (DCT) fracture tests were performed at three low temperatures to measure the fracture energy for 28 asphalt mixtures, which represent a combination of factors including binder type, binder modifier, aggregate type, asphalt content and air voids. In this study, the analysis from the experimental data indicates that fracture energy is strongly dependent upon temperature and significantly affected by type of aggregate and binder modifier. The results of the analysis show the significance of air voids in the SCB test, but no statistical difference was found for the DCT test data. The analysis also illustrates that richer mixtures, ones with more asphalt than the design optimum, are not necessarily more crack resistant.

[1]  André Molenaar,et al.  SEMI-CIRCULAR BENDING TEST; SIMPLE BUT USEFUL? , 2002 .

[2]  A. Shukla,et al.  RHEOLOGICAL AND MECHANICAL PROPERTIES OF BLENDED ASPHALTS CONTAINING RECYCLED ASPHALT PAVEMENT BINDERS , 1999 .

[3]  Reynaldo Roque,et al.  Identification and verification of a suitable crack growth law , 2001 .

[4]  Mihai O. Marasteanu,et al.  Evaluation of the low temperature fracture resistance of asphalt mixtures using the semi circular bend test , 2004 .

[5]  Rilem.  Determination of the fracture energy of mortar and concrete by means of three-point bend tests on notched beams , 1985 .

[6]  G. H. Paulino,et al.  Disk-shaped compact tension test for asphalt concrete fracture , 2005 .

[7]  Michael S Mamlouk,et al.  Evaluation of crack propagation properties of asphalt mixtures , 1997 .

[8]  Rilem.  FMC 1 Determination of the fracture energy of mortar and concrete by means of three-point bend tests on notched beams , 1985 .

[9]  Anastasios M. Ioannides,et al.  Fracture Mechanics in Pavement Engineering: The Specimen-Size Effect , 1997 .

[10]  Simon A M Hesp,et al.  Low-Temperature Fracture Testing of Asphalt Binders: Regular and Modified Systems , 2000 .

[11]  André Molenaar,et al.  Application of fracture mechanics principles to analyse cracking in asphalt concrete , 1996 .

[12]  Simon A M Hesp,et al.  MODIFICATION OF ASPHALT BINDERS AND ASPHALT CONCRETE MIXES WITH CRUMB AND CHEMICALLY DEVULCANIZED WASTE RUBBER , 1995 .

[13]  Mugurel Turos,et al.  Study of low temperature cracking in asphalt mixtures using mechanical testing and acoustic emission methods , 2007 .

[14]  Glaucio H. Paulino,et al.  Development of a Single-Edge Notched Beam Test for Asphalt Concrete Mixtures , 2005 .

[15]  P. C. Paris,et al.  A Critical Analysis of Crack Propagation Laws , 1963 .

[16]  Nolan K. Lee,et al.  Low temperature fracture of polyethylene-modified asphalt binders and asphalt concrete mixes , 1995 .

[17]  Glaucio H. Paulino,et al.  Investigation of the Fracture Resistance of Hot-Mix Asphalt Concrete Using a Disk-Shaped Compact Tension Test , 2005 .

[18]  K. Kim,et al.  Effect of differential thermal contraction on fracture toughness of asphalt materials at low temperatures , 1995 .

[19]  Reynaldo Roque,et al.  Performance-Based Fracture Criterion for Evaluation of Moisture Susceptibility in Hot-Mix Asphalt , 2004 .

[20]  Glaucio H. Paulino,et al.  A bilinear cohesive zone model tailored for fracture of asphalt concrete considering viscoelastic bulk material , 2006 .

[21]  S. Sulaiman,et al.  The use of fracture mechanics for the evaluation of asphalt mixes , 1995 .

[22]  Raj Dongré,et al.  DEVELOPMENT OF FRACTURE CRITERION FOR ASPHALT MIXES AT LOW TEMPERATURES , 1989 .

[23]  R. Roque,et al.  Thermal cracking performance and design of mixtures using Superpave , 1995 .

[24]  Joseph F Labuz,et al.  Determining the Low-Temperature Fracture Toughness of Asphalt Mixtures , 2002 .