Preliminary Study on X-Ray Computed Tomography to Evaluate Voids in Porous Asphalt Concrete

Abstract:

The study applies Computed Tomography technology to probe into the porous asphalt concrete and air voids content, and at the same time, try to qualify accessible voids and closed voids and to use the result to evaluate the performance of porous asphalt concrete. The nominal maximum aggregate of this study is 19.0mm. In order to adjust the image of the gray threshold, the void of PAC specimen was obtained by cut-and-try method with the mix design. After scanning through the PAC specimen, the self-innovated software is used to calculate the Va(%), accessible voids and closed voids. After careful calculation, it showed that the accessible voids are about 20.3%, and the closed voids are about 1.15%. Base on the study, it could analyze the effect of pore clogging in PAC with improved the durability and lifetime.

• Periodical: Applied Mechanics and Materials (Volumes 174-177)
• Pages: 345-353
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.174-177.345
• Online since: May 2012
• Authors: J. D. Lin, Ming Chin Yeh, Po Hsun Sung, R. H. Shiu
• Keywords: Air Void, Porous Asphalt Concrete (PAC), X-Ray Computer Tomography

References

[1] Joubert, R. M. (1992). Durable open-graded mixes enhance safety and reduce noise. Asphalt Magazine, 6(1), 1-2.

[2] Lin, J. D., Yeh, M. C., Hung, C. T., & Chiou, C. R. (2011). Analysis of the relationship between porous pavement thickness and spray quantification. Advanced Materials Research, 243-249, 4139-4146.

DOI: 10.4028/www.scientific.net/amr.243-249.4139

[3] Meiarashi, S. (1999). Research on low noise pavement in Japan. Journal of the Acoustical Society of Japan, 20(1), 19-27.

[4] Powell, R. L. (2009). Construction and performance of Georgia's permeable surface mixes on 2006 NCAT pavement test track. Paper presented at the Transportation Research Board 88rd Annual Meeting, Washington, D.C.

[5] Lefebvre, G. (1993). Porous Asphalt: Permanent International Association of Road Congresses.

[6] Wang, L. (2010). Mechanics of Asphalt: Microstructure and Micromechanics: McGraw-Hill Professional.

[7] Jandhyala, V., & Dasgupta, N. (2002). Characterization of air void distribution in asphalt mixes using X-ray computed tomography. Journal of Materials in Civil Engineering, 14, 122.

DOI: 10.1061/(asce)0899-1561(2002)14:2(122)

[8] Arambula, E., Masad, E., & Martin, A. E. (2007). Influence of air void distribution on the moisture susceptibility of asphalt mixes. Journal of Materials in Civil Engineering, 19, 655.

DOI: 10.1061/(asce)0899-1561(2007)19:8(655)

[9] Al-Omari, A., Tashman, L., E., M., Cooley, A., & T., H. (2002). Proposed methodology for predicting HMA permeability. Journal of the Association of Asphalt Paving Technologists, 71(2), 30-58.

[10] Hall, K. D., & Ng, H. G. (2001). Development of void pathway test for investigating void interconnectivity in compacted hot-mix asphalt concrete. Transportation Research Record: Journal of the Transportation Research Board, 1767(-1), 40-47.

DOI: 10.3141/1767-06

[11] Wang, L., Frost, J., & Shashidhar, N. (2001). Microstructure study of WesTrack mixes from X-ray tomography images. Transportation Research Record: Journal of the Transportation Research Board, 1767(-1), 85-94.

DOI: 10.3141/1767-11

[12] Tashman, L., Wang, L., & Thyagarajan, S. (2007). Microstructure characterization for modeling HMA behaviour using imaging technology. Road Materials and Pavement Design, 8(2).

DOI: 10.3166/rmpd.8.207-238