Horizontal homogeneity in laboratory-compacted asphalt specimens

Based on Marshall- and gyratory-compacted specimens and digital image processing, the horizontal homogeneity with depth of laboratory-compacted asphalt specimens was investigated. The effect of horizontal homogeneity on an indirect tensile (IDT) test was numerically simulated by the finite element method and was verified by IDT testing. Results showed the inhomogeneity in the horizontal direction of laboratory-compacted asphalt specimens. The horizontal homogeneity varied with depth of the laboratory-compacted asphalt specimens. Marshall specimens were better than the gyratory-compacted specimens in terms of the homogeneity of the horizontal cross sections at the top and bottom. Additionally, with an increase in the nominal maximum aggregate size, the horizontal homogeneity in the laboratory-compacted asphalt specimens deteriorated. The horizontal homogeneity also dominated variations in the maximum stresses (in-plane principal stresses and Von Mises stresses) in the IDT test.

[1]  J. D. Frost,et al.  Microstructure Study of WesTrack Mixes from X-Ray Tomography Images , 2001 .

[2]  Mary Stroup-Gardiner,et al.  SEGREGATION IN HOT-MIX ASPHALT PAVEMENTS , 2000 .

[3]  Herv,et al.  Advances in Interlaboratory Testing and Evaluation of Bituminous Materials , 2013 .

[4]  Manfred N. Partl,et al.  Gyratory Compaction Analysis with Computer Tomography , 2003 .

[5]  E R Brown,et al.  INVESTIGATION OF SEGREGATION OF ASPHALT MIXTURES IN THE STATE OF GEORGIA , 1989 .

[6]  Hussain U Bahia,et al.  Internal structure characterization of asphalt mixtures for rutting performance using imaging analysis , 2012 .

[7]  Haleh Azari,et al.  EFFECT OF RADIAL INHOMOGENEITY ON SHEAR PROPERTIES OF ASPHALT MIXTURES , 2005 .

[8]  Hashem R Al-Masaeid,et al.  An innovative digital image analysis approach to quantify the percentage of voids in mineral aggregates of bituminous mixtures , 1998 .

[9]  E. Masad,et al.  Internal structure analysis of asphalt mixes to improve the simulation of Superpave gyratory compaction to field conditions , 2001 .

[10]  Linbing Wang,et al.  Microstructure Characterization for Modeling HMA Behaviour using Imaging Technology , 2007 .

[11]  Sun Lijun.  Index System of Sub-Microstructure Analysis System of Asphalt Concrete(MASAC) , 2007 .

[12]  Taisir S. Khedaywi,et al.  Effect of Segregation on Fatigue Performance of Asphalt Paving Mixtures , 1996 .

[13]  Zhong Qi Yue,et al.  APPLICATION OF DIGITAL IMAGE PROCESSING TO QUANTITATIVE STUDY OF ASPHALT CONCRETE MICROSTRUCTURE , 1995 .

[14]  Yong Peng,et al.  Application of Statistical Methods in Evaluating Asphalt Mixture Homogeneity , 2009 .

[15]  Dallas N. Little,et al.  Computations of particle surface characteristics using optical and X-ray CT images , 2005 .

[16]  Haleh Azari,et al.  ASSESSMENT OF ASPHALT SPECIMEN HOMOGENEITY , 2001 .

[17]  E R Brown,et al.  EFFECT OF SEGREGATION ON PERFORMANCE OF HOT-MIX ASPHALT , 1993 .

[18]  Haleh Azari,et al.  Computer Simulation of Statistical Characterization of Aggregate Inhomogeneity in Asphalt Concrete , 2001 .

[19]  H. Azari.  EFFECT OF AGGREGATE INHOMOGENEITY ON MECHANICAL PROPERTIES OF ASPHALT MIXTURES , 2005 .

[20]  Andy Collop,et al.  Aggregate Orientation and Segregation in Laboratory-Compacted Asphalt Samples , 2004 .

[21]  Thomas F. Wolff,et al.  Using Pavement Distress Data to Assess Impact of Construction on Pavement Performance , 2001 .

[22]  Mehmet T. Tumay,et al.  An Evaluation of the Stress Non-Uniformity due to the Heterogeneity of AC in the Indirect Tensile Test , 2005 .

[23]  Y. Peng,et al.  Towards an Index of Asphalt Mixture Homogeneity , 2009 .

[24]  Eyad Masad,et al.  Internal Structure Characterization of Asphalt Concrete Using Image Analysis , 1999 .

[25]  Al Rousan,et al.  Characterization of aggregate shape properties using a computer automated system , 2005 .

[26]  Hussain U Bahia,et al.  Mixture Design and Compaction , 2013 .

[27]  Thomas F. Wolff,et al.  Detecting Segregation in Bituminous Pavements , 2002 .