A Study of Relationship Between Residual Asphalt in Aggregate Surface and Aging Degree of its Asphalt

Abstract:

Abstract. Laying the road, a lot of asphalt mixing plants use recycled asphalt concrete instead of fresh asphalt concrete. The main reason is that the plants don’t need to provide the viscosity inspection when testing because it is not mentioned in the contract. Even if the value of bitumen viscosity is high in the test report, it is difficult to prove effectively whether to join the asphalt recycled materials or not. This study is to explore the relationship between their extraction of bitumen and coarse aggregate cleanliness by Soxhlet extraction from asphalt recycled materials and fresh asphalt concrete. Besides, we look for the differences after washing asphalt. The research focuses on the method to view the number of the cleanliness on the coarse aggregate surface. The coarse aggregates will be divided into four kinds of sieve (3/4 ", 1/2", 3/8 ", # 4) in process. The selected range is by the built-in program of Photoshop_CS3. We determined the percentage of asphalt area on the aggregates in line with the RGB values. We further used the image processing techniques (Matlab program of image analysis) to assess the relationship of the above mention and compared the basic properties of the asphalt.

• Periodical: Advanced Materials Research (Volumes 602-604)
• Pages: 985-989
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.602-604.985
• Online since: December 2012
• Authors: Wen Tsung Liu, Ming Ho Tu
• Keywords: Asphalt Physical Properties, Digital Image Processing, Recycled Asphalt Concrete

References

[1] Chih-Ming Chen : Analysis of Performance of Recycled Asphalt Concrete, Master's treatise, National Cheng Kung University Department of Civil Engineering (2006) . (in Chinese)

[2] Jung -Chtuan Chi : Internal Structure Characterization of Asphalt Concrete Using Image Analysis, Master's treatise, National Central University Department of Civil Engineering (2000) . (in Chinese)

[3] Pan-Au Tsai : Asphalt Concrete , San Min Bookstore Co. Ltd.(2000)

[4] Tainan City Government Economic Development Board to provide expert reports : Liouying Technology Industrial Park The second of the Development Zone Road works asphalt quality accreditation (2011). (in Chinese)

[5] Monismith, C L : Influence of Shape, Size, and Surface Texture On The Stiffness and Fatigue Response of Asphalt Mixtures, Highway Research Board Special Report (1970). (in America)

[6] Kuo,C-Y. , Rollings , R.S. and L.N Lynch: Morphological Study of Coarse Aggregate Using Image Analysis, Journal of Materials in Civil Engineering, ASCE (1998). (in America)

[7] Andreas Schafer, and Thomas Teyssen : Sedimentary Geology. 52 (1987) ,P . 251-271