Improving fatigue and low temperature performance of 100% RAP mixtures using a soybean-derived rejuvenator

Abstract One of the major obstacles towards higher mixture percentages of reclaimed asphalt pavements (RAP) is its greater susceptibility to failure under low temperatures and fatigue loading. Rejuvenators offer a very attractive solution by partially or fully restoring the aged properties of the RAP binder. In this research, a soybean-derived rejuvenator is used to modify a PG58-28 binder at 6% and 12% by weight. The soybean-modified PG58-28 and a neat PG58-28 are blended with an extracted RAP binder. Changes in the rheological properties of the different blends are assessed using performance grading (PG), temperature-frequency sweep and linear amplitude sweep (LAS) testing. RAP mixtures made of 100% RAP with the addition of neat PG58-28 or soybean-modified PG58-28 were used to prepare dynamic modulus and disk-shaped compact tension (DCT) specimens. The binder testing results clearly indicate that the soybean-derived rejuvenator has a significant impact on both the low and high temperature properties of the RAP binder. Such improvement was not attainable by using the neat PG58-28 alone. The soybean-derived rejuvenator also shows sustained durability with aging. The LAS results indicate a significant increase in the fatigue life of the soybean rejuvenated RAP binder. Results of dynamic modulus testing do not reveal significant differences between the various mixtures. The fracture energy of the mixtures prepared with the soybean rejuvenator is higher than the control mixtures as revealed by DCT test results.

[1]  Nam H Tran,et al.  Effect of Rejuvenator on Performance Properties of HMA Mixtures with High RAP and RAS Contents , 2012 .

[2]  Mostafa A. Elseifi,et al.  Laboratory Evaluation of Asphalt Mixtures Containing Sustainable Technologies , 2011 .

[3]  Huanan Yu,et al.  An Investigation of Dynamic Modulus and Flow Number Properties of Asphalt Mixtures In Washington State , 2011 .

[4]  D. Little,et al.  Fatigue characterization of asphalt concrete using viscoelasticity and continuum damage theory , 1997 .

[6]  S. H. Firoozifar,et al.  The effect of asphaltene on thermal properties of bitumen , 2011 .

[7]  Robert Frank,et al.  Influence of Six Rejuvenators on the Performance Properties of Reclaimed Asphalt Pavement (RAP) Binder and 100% Recycled Asphalt Mixtures , 2014 .

[8]  R. R. Davison,et al.  Development of a New Method for Assessing Asphalt Binder Durability with Field Validation , 2005 .

[9]  R M Anderson,et al.  CHARACTERIZATION OF MODIFIED ASPHALT BINDERS IN SUPERPAVE MIX DESIGN , 2001 .

[10]  Martins Zaumanis,et al.  Rheological, microscopic, and chemical characterization of the rejuvenating effect on asphalt binders , 2014 .

[11]  William G. Buttlar,et al.  The effect of long-term laboratory aging on asphalt concrete fracture energy , 2009 .

[12]  Joseph H. Podolsky,et al.  Preliminary examination of soybean oil derived material as a potential rejuvenator through Superpave criteria and asphalt bitumen rheology , 2017 .

[13]  M Marateanu,et al.  TIME-TEMPERATURE DEPENDENCY OF ASPHALT BINDERS -- AN IMPROVED MODEL (WITH DISCUSSION) , 1996 .

[14]  Philip R. Herrington,et al.  Thermal decomposition of asphalt sulfoxides , 1995 .

[15]  Hussain U Bahia,et al.  Measuring and Defining Fatigue Behavior of Asphalt Binders , 2002 .

[17]  Hussain U Bahia,et al.  Modification and Validation of Linear Amplitude Sweep Test for Binder Fatigue Specification , 2011 .

[18]  Grant Julian,et al.  Effects of Changing Virgin Binder Grade and Content on RAP Mixture Properties , 2012 .

[19]  M. Marasteanu,et al.  Effect of Reclaimed Asphalt Pavement (Proportion and Type) and Binder Grade on Asphalt Mixtures , 2008 .

[20]  Hussain U Bahia,et al.  Practical Application of Viscoelastic Continuum Damage Theory to Asphalt Binder Fatigue Characterization , 2009 .

[21]  Douglas I Hanson,et al.  Evaluation of the Relationship between Asphalt Binder Properties and Non-Load Related Cracking , 2011 .

[22]  Y. Kim.  MODELING OF ASPHALT CONCRETE , 2007 .

[23]  Jo Sias Daniel,et al.  Mechanistic and Volumetric Properties of Asphalt Mixtures with Recycled Asphalt Pavement , 2005 .

[24]  Rajib B. Mallick,et al.  Evaluation of different recycling agents for restoring aged asphalt binder and performance of 100 % recycled asphalt , 2015 .

[25]  Fujie Zhou,et al.  Development of new mix design method for asphalt mixtures containing RAP and rejuvenators , 2016 .

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

[27]  Richard Schapery.  Correspondence principles and a generalizedJ integral for large deformation and fracture analysis of viscoelastic media , 1984 .

[28]  Y R Kim,et al.  A Simple Testing Method to Evaluate Fatigue Fracture and Damage Performance of Asphalt Mixtures (With Discussion) , 2006 .

[29]  Randy C West,et al.  IMPROVED MIX DESIGN, EVALUATION, AND MATERIALS MANAGEMENT PRACTICES FOR HOT MIX ASPHALT WITH HIGH RECLAIMED ASPHALT PAVEMENT CONTENT , 2013 .