Investigating self healing behaviour of pure bitumen using Dynamic Shear Rheometer

Abstract Self healing is known as a built-in property of bitumen, which can help bitumen and asphalt concrete to recover its strength after damage. Healing can also extend the service life of asphalt pavements. A two-piece healing (TPH) test was developed to investigate the self healing behaviour of pure bitumen using the Dynamic Shear Rheometer (DSR). During the TPH test, a healing process was directly simulated by pressing the two pieces of bitumen together under a parallel-plate system. Two phases can be distinguished from the TPH healing test, the initial healing phase due to gap closure, and the time dependent healing phase. The results are summarised as following. (1) Initial healing phase: The initial healing phase has a three-stage complex modulus increase with the closure of the gap thickness. A rapid increase of the complex modulus is observed in the second stage of the initial healing curve due to a 0.5 mm gap reduction. (2) Time dependent healing phase: The time dependent healing results show a distinctive difference between the gap constant control mode and the normal force constant control mode. The normal force control healing can be decomposed into the time dependent healing during a gap constant mode and additional healing by compression. It was indicated that the compressive normal force strongly promotes healing development. (3) It was also demonstrated that many factors can influence the complex modulus measurement results by using the DSR parallel-plate geometry.

[1]  G. Airey.  Rheological properties of styrene butadiene styrene polymer modified road bitumens , 2003 .

[2]  L. Mo,et al.  Damage development in the adhesive zone and mortar of porous asphalt concrete , 2010 .

[3]  Ramamohan Reddy Bommavaram.  Evaluation of healing in asphalt binders using dynamic shear rheometer and molecular modeling techniques , 2009 .

[4]  S. V. D. Zwaag.  Self healing materials : an alternative approach to 20 centuries of materials science , 2007 .

[5]  P Redelius,et al.  FATIGUE AND HEALING CHARACTERISTICS OF BITUMENS STUDIED USING DYNAMIC SHEAR RHEOMETER , 2003 .

[6]  L Francken,et al.  FATIGUE PERFORMANCE OF A BITUMINOUS ROAD MIX UNDER REALISTIC TEST CONDITIONS , 1979 .

[7]  Hussain U Bahia,et al.  NON-LINEAR VISCOELASTIC AND FATIGUE PROPERTIES OF ASPHALT BINDERS , 1999 .

[8]  P Uge,et al.  THE FATIGUE OF BITUMEN AND BITUMINOUS MIXES , 1972 .

[9]  P. Bazin,et al.  DEFORMABILITY, FATIGUE AND HEALING PROPERTIES OF ASPHALT MIXES , 1967 .

[10]  Y. Richard Kim,et al.  Application of Thixotropy to Analyze Fatigue and Healing Characteristics of Asphalt Binder , 2010 .

[11]  S. Hesp,et al.  CRACK PINNING IN ASPHALT MASTIC AND CONCRETE: EFFECT OF REST PERIODS AND POLYMER MODIFIERS ON THE FATIGUE LIFE , 2000 .

[12]  D. Bodin,et al.  TEMPERATURE EFFECTS IN BINDER FATIGUE AND HEALING TESTS , 2004 .

[13]  Ezio Santagata,et al.  Rheological and Chemical Investigation on the Damage and Healing Properties of Bituminous Binders , 2009 .

[14]  Dallas N. Little,et al.  Determining Intrinsic Healing Properties of Asphalt Binders , 2009 .

[15]  Robert L. Lytton,et al.  FATIGUE AND HEALING CHARACTERIZATION OF ASPHALT MIXTURES , 2003 .

[16]  J. Qiu,et al.  Investigating the Self Healing Capability of Bituminous Binders , 2009 .

[17]  E. Hagos,et al.  The effect of aging on binder proporties of porous asphalt concrete , 2008 .

[18]  Dallas N. Little,et al.  A Framework to Quantify the Effect of Healing in Bituminous Materials using Material Properties , 2008 .

[19]  Shaopeng Wu,et al.  Investigation into material optimization and development for improved ravelling resistant porous asphalt concrete , 2010 .

[20]  Hai Huang,et al.  Fatigue and Healing in Asphalt Binders , 2009 .

[21]  D. Little,et al.  USE OF DYNAMIC MECHANICAL ANALYSIS (DMA) TO EVALUATE THE FATIGUE AND HEALING POTENTIAL OF ASPHALT BINDERS IN SAND ASPHALT MIXTURES (WITH DISCUSSION AND CLOSURE) , 2002 .

[22]  Hussain U Bahia,et al.  Effect of Film Thickness on Rheological Behavior of Asphalt Binders , 2000 .