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Flexural Behavior of Warm Mix Asphalt Concrete

Saad Issa Sarsam


Research work on implementation of Warm Mix Asphalt (WMA) for roadway paving has been undertaken by many researchers due to its beneficial impact on the environment and reduction in the fuel consumption. In this investigation, two WMA mixtures have been prepared in the laboratory using medium curing cutback (MC-30) and Cationic emulsion. Hot mix asphalt (HMA ) mixture was also prepared for comparison. Beam specimens of (380 mm) in length, (80 mm) in width and (50 mm) in height were constructed form the mixtures and subjected to flexural fatigue test under repeated flexural stresses through the four-point loading technique at 25°C. Test results were analyzed and compared. It was concluded that HMA specimen can sustain more than 100% of load repetitions to failure higher as compared to the two types of WMA, On the other hand, the tensile strain of WMA with cutback and emulsion was (37.5 and 54) % lower than that of HMA respectively. Emulsion exhibit more susceptible behavior to asphalt content variation as compared to WMA-cutback or HMA. A sharp reduction in the stiffness rate could be noticed for WMA mix with cutback as compared to the gentle reduction in the case of WMA mix of emulsion and HMA. For HMA and WMA it was found that the resilient modulus decreased by a range of (4–20) % when the asphalt content increases or decreases by 0.5% from its optimum requirements.


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Sarsam SI, AL-Lamy AK. Fatigue Behavior of Modified Asphalt Concrete Pavement. Journal of Engineering. Feb 2016; 22(2):

Tutu K, Tuffour Y. Warm-Mix Asphalt and Pavement Sustainability: A Review. Open Journal of Civil Engineering. 2016; 6: 84–93p.

Bonaquist RF. Mix design practices for warm mix asphalt. Transportation Research Board. 2011; 691:

Sarsam SI. Behavior of Warm Mix Asphalt Concrete under Moisture Damage. International Journal of Engineering Papers. Science Research Gate. 2018; 4(1): 21–28p.

NCHRP, Mix Design Practices for Warm-Mix Asphalt, TRB Project. 2011; 09–43p.

West R. Engineering properties and field performance of warm mix asphalt technologies. NCHRP Final Report Project, (Project No. NCHRP 09-47A), 2014; (09-47A), 338p.

Sarsam SI. Comparative Assessment of Tensile and Shear Behavior of Warm and Hot Mix Asphalt Concrete. Scientific Research Gate. International Journal of Engineering papers; 2016; 1(2): 1–8p.

Yin F, Martin A, Arámbula-Mercado E. Warm-Mix Asphalt Moisture Susceptibility Evaluation for Mix Design and Quality Assurance. Transportation Research Record: Journal of the Transportation Research Board. No. 2575, Transportation Research Board, Washington, 2016; 39–47p.

Abdullaha M, Zamharia K, Buharia R, Abu Bakara S, Kamaruddina N, Nayanb N, Haininc M, Abdul Hassanc N, Hassanc S, Yusoffd N. Warm Mix Asphalt Technology: A Review, Jurnal Teknologi. 2014; 71(3): 39–52p.

López C. Study of warm mix asphalt with super stabilized emulsion. Revista Ingeniería de Construcción. RIC. 2017; 32(1): 57–64p.

Raghavendra A. Laboratory and construction evaluation of warm-mix asphalt. Journal of Materials in Civil Engineering, 2016; 28(7).

Miller I, Bahia H. Sustainable asphalt pavements: technology, knowledge gaps, and opportunities. Modified Asphalt Research Centre, University of Wisconsin, 2009, Madison.

Sargand S, Figueroa L, Edwards W, Al-Rawashdeh A. Performance assessment of warm mix asphalt (WMA) pavements. Report FHWA/OH-2009/08, 2009. Ohio Research Institute for Transportation and the Environment.

Esenwa M. Evaluation of Warm Mix Asphalt Behavior – Stability and Strength Perspective. CTAA Annual Conference Proceedings, Canadian Technical Asphalt. 2011.

Rashwan MH. Characterization of Warm Mix Asphalt (WMA) performance in different asphalt applications. Ames, Iowa: Ph. D. Dissertation, Civil Engineering Department- Iowa State University. 2012

State Commission of Roads and Bridges (SCRB), Standard Specification for Roads & Bridges. Ministry of Housing & Construction, Iraq. 2003

ASTM, Road and Paving Materials, Annual Book of ASTM Standards, Volume 04.03, American Society for Testing and Materials, West Conshohocken, USA. 2013.

Nihad Z. Warm mix asphalt concrete. MSc Thesis, 2018, University of Baghdad, Civil Engineering Department, College of Engineer.

AASHTO-T321-14, Standard Test Method for Determining the Fatigue Life of Compacted Asphalt Mixtures Subjected to Repeated Flexural Bending. Washington D.C.: American Association of State Highway and Transportation Officials, 2016, (AASHTO).

Yassin, Y. Development of Fatigue Prediction Model for Local Asphalt Paving Materials. Baghdad: Ph.D. Dissertation, 2009, Civil Engineering Department, College of Engineer, University of Baghdad.

Sarsam S. I. and AL-Lamy A. K. Fatigue Life Assessment of Modified Asphalt Concrete International Journal of Scientific Research in Knowledge, IJSRK 3(2), 2015; 030–041p.

Mudher MR. Modeling of Fatigue Cracking for Flexible Pavement in Iraq. MSc. Thesis, Highway and Transportation Engineering Department, College of Engineer, AL-Mustansiriayah University, Baghdad. 2013.

Sadeq M. Characterization of the damage of bituminous materials prepared with warm mix asphalt additives. Ph. D. Dissertation, 2017, University of Liverpool.

Bower NE. Evaluation of the performance of warm mix asphalt in Washington State. International Journal of Pavement Engineering, 2016, 17(5), 423-434.

Jenkins KE. Flexural stiffness and fatigue properties of warm mix asphalt. Proceedings, 10th Conference on Asphalt Pavements for Southern Africa. 2011, [CAPSA11].

Sarsam SI, Jasim SI. Influence of Micro Crack Healing on the Deformation under Repeated Flexural Stress of Modified Asphalt Concrete. International Journal of Emerging Engineering Research and Technology. 2017; 5(11): 55–62p.

Goh SW. Development and improvement of warm-mix asphalt technology. Michigan: Ph. D. Dissertation, Civil Engineering Department, Michigan Technological University. 2012

Sarsam S, Husain H. Monitoring the Impact of Micro Cracks Healing Cycles on the Deformation of Asphalt Concrete under Repeated Loading. Proceedings, International Congress and Exhibition -Sustainable Civil Infrastructures: Innovative Infrastructure Geo-technology- Geo M East 2017: Advancement in the Design and Performance of Sustainable Asphalt Pavements, Sharm El-Sheikh, Egypt, Springer Cham. 15–19 July; 287–299p.

Sarsam SI, Jasim S. A. Assessment of Resilient Characteristics of Modified Asphalt Concrete. International Journal of Engineering Papers, Science Research Gate. 2018; 4(1): 10–20p.

Jalali V. Performance of warm mix asphalt compacted at reduced temperature. PhD Dissertation, 2016, Department of Civil Engineering, University of Nottingham.



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