Tensile Strength of Asphalt Concrete due to Moisture Conditioning

Authors: Md R. Islam, Rafiqul A. Tarefder

Abstract:

This study investigates the effect of moisture conditioning on the Indirect Tensile Strength (ITS) of asphalt concrete. As a first step, cylindrical samples of 100 mm diameter and 50 mm thick were prepared using a Superpave gyratory compactor. Next, the samples were conditioned using Moisture Induced Susceptibility Test (MIST) device at different numbers of moisture conditioning cycles. In the MIST device, samples are subjected water pressure through the sample pores cyclically. The MIST conditioned samples were tested for ITS. Results show that the ITS does not change significantly with MIST conditioning at the specific pressure and cycles adopted in this study.

Keywords: Asphalt concrete, tensile strength, moisture, laboratory test.

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1096247

References:

[1] D. Cheng, D. Little, R. Lytton, J. Holste, "Moisture damage evaluation of asphalt mixture by considering both moisture diffusion and repeated load conditions,” The annual meeting of Transportation Research Board (CDROM): Washington (DC, USA); 2003.
[2] S. Cross, M,. Voth, "Effects of sample preconditioning on asphalt pavement analyzer (APA) wet rut depths,” The annual meeting of Transportation Research Board (CDROM): Washington (D.C., USA); 2001.
[3] W. Wong, H. Han, G. He, X. Qiu, K. Wang, W. Lu, "Effects of water on permanent deformation potential of asphalt concrete mixtures.” Mater. Struc., 37(272), 2004, pp.532–538.
[4] M. Weldegiorgis, "On dynamic modulus of asphalt concrete for moisture damage,” Ph.D. Dissertation, Department of Civil Engineering, University of New Mexico, 2014.
[5] M. Islam, U. Mannan, A. Rahman and R. Tarefder, "Effects of reclaimed asphalt pavement on hot-mix asphalt.” ASTM Journal of Advances in Civil Engineering Materials, Vol. 3, No. 1, 2014, pp. 291–307.
[6] R. A. Tarefder, and M. Ahmad, "Evaluating the Relation between Permeability and Moisture Damage of Hot Mix Asphalt." ASCE Journal of Materials in Civil Engineering, 2014. (Manuscript ID: MTENG- 2200), in press.
[7] D. Tunnicliff, R. Root, "Use of antistripping additives in asphaltic concrete mixtures: laboratory phase,” NCHRP Report 274, Transportation Research Board, Washington (D.C., USA); 1984.
[8] AASHTO T 283-03, "Resistance of Compacted Asphalt Mixtures to Moisture-Induced Damage, Standard Specifications for Transportation Materials and Methods of Sampling and Testing,” 27th Edition, 2007. American Association of State Highway and Transportation Officials, Washington, D.C.
[9] T. Fwa, C. Oh, "Effect of moisture content on measured properties of asphalt mixtures,” Transport Res. Rec., 1492, 1995, pp. 61–70.
[10] H. Ping, and W. Gun, "Effects of moisture on strength and permanent deformation of foamed asphalt mix incorporating RAP materials,” Construction and Building Materials, Vol. 22, 2008, pp. 30–40.
[11] R. Terrel, A. Saleh, "Water sensitivity of asphalt-aggregate mixes: test selection,” SHRP-A-403; 1994.
[12] J. Epps, P. Sebaaly, J. Penaranda, M. Mather, M. McCann, A. Hand, "Compatibility of a test for moisture-induced damage with Superpave volumetric mix design,” NCHRP Report 444, Transportation Research Board, Washington (D.C., USA); 2000.
[13] AASHTO T 312-07, "Preparing and determining the density of Hot-Mix asphalt (HMA) specimens by means of the Superpave gyratory compactor,” Standard Specifications for Transportation Materials and Methods of Sampling and Testing, 27th Edition, American Association of State Highway and Transportation Officials, Washington, D.C., 2007.
[14] AASHTO T 166-07, "Bulk specific gravity of compacted Hot Mix Asphalt using saturated surface-dry specimens,” Standard Specifications for Transportation Materials and Methods of Sampling and Testing, 27th Edition, 2007. American Association of State Highway and Transportation Officials, Washington, D.C.
[15] AASHTO T 209-05, "Theoretical maximum specific gravity and density of hot mix paving mixtures,” Standard Specifications for Transportation Materials and Methods of Sampling and Testing, 27th Edition, 2007. American Association of State Highway and Transportation Officials, Washington, D.C.