Pravat Karki, P.E., Ph.D.

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Journal Articles

Hu, S, Luo, X, Zhou, F, Crockford, W, and Karki, P. “Simple Asphalt Mixture Shear Rutting Test and Mechanical Analysis". ASCE Journal of Materials in Civil Engineering. In Publication.
Rivera, C, Caro, S, Arámbula-Mercado, E, Sánchez, D.B, R, and Karki, P. “Evaluation of the Use of a HiMA Binder to Extend the Durability of Porous Friction Courses (PFC)". International Journal of Pavement Engineering. DIO: 10.1080/10298436.2021.2024186.
Karki, P, Mraiza, Z, Karnei, E, and Hu, S. “Performance-Graded Asphalt Binder Selection Catalog for Asphalt Overlays". Construction and Building Materials, 319, 2021, 126012, DOI: 10.1016/j.conbuildmat.2021.126012 .
Rivera, C, Caro, S, Arámbula-Mercado, E, Sánchez, D.B, R, and Karki, P. “Comparative Evaluation of Ageing Effects on the Properties of Regular and Highly Polymer Modified Asphalt Binders". Construction and Building Materials, 302, 2021, 124163. DOI: 10.1016/j.conbuildmat.2021.124163 .
Fatigue and Self-healing Characterization of Asphalt Composites Containing Rock Asphalts". Construction and Building Materials, 230, 2020, 727-734. DOI: 10.1016/j.conbuildmat.2019.116835.
Li, R, Karki, P, and Hao , P. “Fatigue and Self-healing Characterization of Asphalt Composites Containing Rock Asphalts". Construction and Building Materials, 230, 2020, 727-734. DOI: 10.1016/j.conbuildmat.2019.116835.
Karki, P, and Zhou, F. “Impact of Re-refined Engine Oil Bottoms on Asphalt Binder Properties". Journal of Transportation Engineering, Part B: Pavements, 145 (4), 2019, DOI: 10.1061/JPEODX.0000134.
Karki, P, and Zhou, F. “Determining Re-refined Engine Oil Bottom Content in Asphalt Binders using a Handheld X-ray Florescence Instrument". Road Materials and Pavement Design, 21(2), 2018, 452-466, DOI: 10.1080/14680629.2018.1500301.
Li, Q, Naik, M.T, Lin, H-S, Hu, C, Serem, W.K., Liu, L, Karki, P, Zhou, F, and Yuan, J.S “Tuning Hydroxyl Groups for Quality Fiber of Lignin". Carbon, 139, 2018, 500-511, DOI: 10.1016/j.carbon.2018.07.015.
Zhou, F, Karki, P, Xie, S, Yuan, J.S, Sun, L, Lee, R and Barborak, R. “Toward the Development of Performance-related Specification for Bio-Rejuvenators”. Construction and Building Materials, 174, 2018, 443-455, DOI: 10.1016/j.conbuildmat.2018.04.093.
Karki, P, and Zhou, F. “Development of a Systematic Method for Quantifying REOB Content in Asphalt Binders with X-Ray Fluorescence Spectroscopy”. Transportation Research Record: Journal of the Transportation Research Board, 2632, 2017, 52-59. DOI: 10.3141/2632-06.
Zhou, F, Karki, P, and Im, S. “Development of a Simple Fatigue Cracking Test for Asphalt Binders”. Transportation Research Record: Journal of the Transportation Research Board, 2632, 2017, 79-87. DOI: 10.3141/2632-09.
Xie, S, Li, Q, Karki, P, Zhou, F, and Yuan, J. S. "Lignin as Renewable and Superior Asphalt Binder Modifier". ACS Sustainable Chemistry & Engineering, 5(4), 2017, 2817-2823. DOI: 10.1021/acssuschemeng.6b03064.
Li, Q, Serem W, Dai, W, Yue, Y, Naik, M, Xie, S, Karki, P, Liu, L, Sue, H, Liang, H, Zhou, F and Yuan, J. S. “Molecular Weight and Uniformity Define the Mechanical Performance of Lignin-Based Carbon Fiber”. Journal of Materials Chemistry A, 5, 2017, 12740-12746. DOI: 10.1039/C7TA01187C.
Karki, P, and Zhou, F. “Effects of Rejuvenators on Rheological, Chemical and Aging Properties of Asphalt Binders Containing Recycled Binders”. Transportation Research Record: Journal of the Transportation Research Board, 2574, 2016, 74-82. DOI: 10.3141/2574-08.
Karki, P, Bhasin, A, and Underwood, BS. “Fatigue Performance Prediction of Asphalt Composites Subjected to Cyclic Loading with Intermittent Rest Periods”. Transportation Research Record: Journal of the Transportation Research Board, 2576, 2016, 72-82. DOI: 10.3141/2576-08.
Karki, P, Yuya, PA, Kim, Y, and Turner, JA. “Nanomechanical Properties of Bituminous Composites and Interfacial Zones”. ASCE Journal of Materials in Civil Engineering, 04016090, 2016. DOI: 10.1061/(ASCE)MT.1943-5533.0001605.
Im, S, Karki, P, and Zhou, F. “Development of New Mix Design Method for Asphalt Mixtures Containing RAP and Rejuvenators”. Construction and Building Materials, 115, 2016, 727-734. DOI: 10.1016/j.conbuildmat.2016.04.081.
Zhang, J., Faruk, ANM, Karki, P, Holleran, I, Hu, X, and Walubita, L.F. "Relating Asphalt Binder Elastic Recovery Properties to HMA Cracking and Fracture Properties". Construction and Building Materials, 121, 2016, 236-245. DOI: 10.1016/j.conbuildmat.2016.05.157.
Karki, P, Kim, Y, and Little, DN. “Dynamic Modulus Prediction of Asphalt Concrete Mixtures through Computational Micromechanics”. Transportation Research Record: Journal of the Transportation Research Board, 2507, 2015, 1-9. DOI: 10.3141/2507-01.
Li, R, Karki, P, Hao, P, and Bhasin, A. “Rheological and Low Temperature Properties of Asphalt Composites Containing Rock Asphalts”. Construction and Building Materials, 96, 2015, 47-54. DOI: 10.1016/j.conbuildmat.2015.07.150.
Zhang, J, Walubita, LF, Faruk, ANM, Karki, P, and Simate, GS. “Use of the MSCR Test to Characterize the Asphalt Binder Properties Relative to HMA Rutting Performance - A Laboratory Study”. Construction and Building Materials, 94, 2015, 218-227. DOI: 10.1016/j.conbuildmat.2015.06.044.
Karki, P, Li, R, and Bhasin, A. “Quantifying Overall Damage and Healing Behavior of Asphalt Materials Using Continuum Damage Approach”. International Journal of Pavement Engineering, 16(4), 2014, 350-362. DOI: 10.1080/10298436.2014.942993.
Ban, H, Karki, P, and Kim, Y. “Nanoindentation Test Integrated with Numerical Simulation to Characterize Mechanical Properties of Rock Materials”. ASTM Journal of Testing and Evaluation, 42(3), 2014, 787-796. DOI: 10.1520/JTE20130035.
Aragão, FTS, Kim, Y, Karki, P and Little, DN. “Semi-Empirical, Analytical, and Computational Predictions of Dynamic Modulus of Asphalt Concrete Mixtures”. Transportation Research Record: Journal of the Transportation Research Board, 2181, 2010, 19-27. DOI: 10.3141/2181-03.
Aragão, FTS, Lee, J, Kim, Y, and Karki, P.“Material-Specific Effects of Hydrated Lime on the Properties and Performance Behavior of Asphalt Mixtures and Asphaltic Pavements”. Construction and Building Materials, 24 (4), 2010, 538-544. DOI: 10.1016/j.conbuildmat.2009.10.005.

Technical Reports

Zhou F, Karki, P, and Hu, S. “Rejuvenator Laboratory Characterization and Field Performance”. Final Report No. FHWA/TX-19/5-6614-01-R1, Texas A&M Transportation Institute, College Station, TX, Aug. 2019.
Arámbula-Mercado, E, Caro, S, Torres, C. A. R., Karki, P, Sánchez-Silva, M, and Park, E. S. “Evaluation of FC-5 with PG 76-22 HP to Reduce Raveling”. Final Report No. FDOT-BE287, Texas A&M Transportation Institute, College Station, TX, May 2019.
Karki, P and Zhou F. “Re-refined Engine Oil Bottom: Detection and Upper Limits in Asphalt Binders and Seal Coat Binders”. Final Report No. FHWA/TX-18/0-6881-R1, Texas A&M Transportation Institute, College Station, TX, April 2019.
Karki, P and Zhou F. “Evaluation of Asphalt Binder Performance with Laboratory and Field Test Sections”. Final Report No. FHWA/TX-18/0-6674-01-R1, Texas A&M Transportation Institute, College Station, TX, November 2018.
Karki, P and Zhou F. “Revised Statewide Asphalt Binder Selection Catalog”. Final Report No. TxDOT 0-6674-01-P1, Texas A&M Transportation Institute, College Station, TX, November 2018.
Newcomb, D, Karki, P, Epps, J, Fernando, E, Arabali, P, Al-Khayat, H and King, G. “A Review of Ontario Asphalt Industry Practices”. TTI Final Report, Texas A&M Transportation Institute, College Station, TX, August 2018.
Karki, P, Meng, L, Im, S, Estakhri, C, and Zhou F. “Re-Refined Engine Oil Bottom: Detection and Upper Limits in Asphalt Binders and Seal Coat Binders”. Final Report No. FHWA/TX-18/0-6881-1, Texas A&M Transportation Institute, College Station, TX, October 2017. In Review.
Motamed, A, Nyanhongo, S, Karki, P, and Bhasin, A. “Fatigue and Fracture Properties of Aged Binders in the Context of Reclaimed Asphalt Mixes”, Final Report No. SWUTC/ 14/ 600451-00076-1, Center for Transportation research, The University of Texas at Austin, Austin, TX, August 2014.
Bhasin, A, and Karki, P. “Characterization of Fatigue Damage and Relevant Properties”, Draft Report No. USDOT/FHWA/WRI/ARC Report No. B, Center for Transportation research, The University of Texas at Austin, Austin, TX, August 2013. In Review.
Bhasin, A, and Karki, P. “AASHTO Method: Method to Quantify (Self) Healing in Asphalt Composites Based on Viscoelastic Continuum Damage Theory”, Draft Report No. USDOT/FHWA/WRI/ARC Report No. B Appendix, Center for Transportation research, The University of Texas at Austin, Austin, TX, August 2013. In Review.
Kim, Y, Aragão, FTS, Ban, H, Karki, P, and Little, DN. “Microstructure Cohesive Zone Modeling for Cracking and Moisture Damage”, Draft Report No. USDOT/FHWA/WRI/ARC Report No. F, University of Nebraska-Lincoln, Lincoln, NE, August 2013. In Review.

Presentations and Proceedings

Zhou, F, Im, S, Yuan, J.S, Karki, P, Hu, S and Barborak, R. “Bio-Rejuvenators: Field Performance and a Preliminary Performance Indicator”. Paper No. 20-04149, TRB 99^th Annual Meeting, Washington, DC, Jan. 2020.
Karki, P, Arámbula-Mercado, E., and Newcomb, D. “Rheological Properties of Isocyanate Modified Binders: An Assessment of Rutting and Cracking Potential”. Presentation, 56^th Petersen Asphalt Research Conference, University of Wyoming, Laramie, WY, July 2019.
Arámbula-Mercado, E, Karki, P, Caro, S, Torres, C. A. R., and Sánchez-Silva, M. “Evaluation of High Polymer Modified Binders to Improve the Durability of Open-Graded Friction Courses”. Presentation, 56^th Petersen Asphalt Research Conference, University of Wyoming, Laramie, WY, July 2019.
Karki, P, and Zhou, F. “Simplified method for estimating REOB content in asphalt binders using a portable x-ray fluorescence spectroscopy instrument". Paper No. 18-03152, TRB 97^th Annual Meeting, Washington, DC, Jan. 2018.
Karki, P*, Zhou, F, and Martogi, D. “Effect of re-refined engine oil bottoms on rheological, cracking, chemical and microstructural properties of asphalt binders”. Paper No. 17-04959, TRB 96^th Annual Meeting, Washington, DC, Jan. 2017.
Karki, P, and Zhou, F. “Development of a systematic method for quantifying REOB content in asphalt binders with x-ray fluorescence spectroscopy”. Paper No. 17-04552, TRB 96^th Annual Meeting, Washington, DC, Jan. 2017.
Zhou, F, Karki, P, and Im, S. “Development of a simple fatigue cracking test for asphalt binders”. Paper No. 17-02288, TRB 96^th Annual Meeting, Washington, DC, Jan. 2017.
Karki, P, and Zhou, F. “Effect of rejuvenators on rheological, chemical, and aging properties of asphalt binders containing recycled binders”. Paper No. 16-4126, TRB 95^th Annual Meeting, Washington, DC, Jan. 2016.
Karki, P, Bhasin, A, and Underwood, BS. “Fatigue performance prediction of asphalt composites subjected to cyclic loading with intermittent rest periods”, Paper No. 16-4152, TRB 95^th Annual Meeting, Washington, DC, Jan. 2016.
Zhang, J, Walubita, LF, Faruk, Abu NM, Lee, SI, and Karki, P, “Relating asphalt binder elastic recovery properties to HMA cracking and fracture properties”, Paper No. 16-6322, TRB 95^th Annual Meeting, Washington, DC, Jan. 2016.
Karki, P, Kim, Y, and Little, DN. “Dynamic modulus prediction of asphalt concrete mixtures through computational micromechanics”. Paper No. 15-1934, TRB 94^th Annual Meeting, Washington, DC, Jan. 2015.
Karki, P, Bhasin, A, and Little, DN. “Experimental method to quantify overall damage and healing in asphalt composites using continuum damage approach”. Paper No. 14-3113, TRB 93^rd Annual Meeting, Washington, DC, Jan. 2014.
Li, R, Karki, P, Hao, P, and Bhasin, A. “Effect of rock asphalts on mechanical properties of asphalt composites”. Paper No. 14-4367, TRB 93^rd Annual Meeting, Washington, DC, Jan. 2014.
Li, R, Karki, P, Hao, P, and Bhasin, A. “Effect of rock asphalts on mechanical properties of asphalt composites”. 2014 CTR Annual Symposium , University of Texas at Austin, Austin, TX, Apr. 2014.
Serigos, PA, Karki, P, Zhang, Z, and Prozzi, JA. “Impact of upgrading the distresses measurement system on assessed pavement network condition”, Paper No. 14-4208, TRB 93^rd Annual Meeting, Washington, DC, Jan. 2014.
Ban, H, Karki, P, and Kim, Y. “Nanoindentation test integrated with numerical simulation to characterize mechanical properties of rock materials”. Paper No. 13-2294, TRB 92^nd Annual Meeting, Washington, DC, Jan. 2013.
Aragão, FTS, Kim, Y, Javaherian, MH, and Karki, P. “A Cohesive Zone Model to predict the Rate-Dependent Fracture Behavior of Heterogeneous and Viscoelastic Asphalt Mixtures”. Conference Paper, 11^th United States National Congress on Computational Mechanics, Minneapolis, MN, DC, July 2011.
Aragão, FTS, Kim, Y, Karki, P, and Little, DN. “Semi-empirical, analytical, and computational predictions of dynamic modulus of asphalt concrete mixtures”. Paper No. 10-1633, TRB 89^th Annual Meeting, Washington, DC, Jan. 2010.
Karki, P. “Computational and experimental characterization of bituminous composites based on experimentally determined properties of constituents”. E-week, Graduate Student Research Symposium and Poster Fair, Lincoln, NE, Apr. 2010.

Journal Review Services

ACS Sustainable Chemistry & Engineering
Advances in Materials and Pavement Performance Prediction Conference
Arabian Journal of Geosciences
ASCE Journal of Materials in Civil Engineering
ASCE Journal of Transportation Engineering, Part B: Pavements
ASTM Journal of Testing and Evaluation
Construction and Building Materials
Fuel: The Science and Technology of Fuel and Energy
International Journal of Pavement Engineering
Journal of Cleaner Production
KSCE Journal of Civil Engineering
Mechanics of Materials
Road Materials and Pavement Design
Science and Technology of Advanced Materials
Transportation Research Record: Journal of the Transportation Research Board