Effect of Oxidative Aging on the Engineering Properties of DGAMs

  • Al-Hadidy A.I. Civil Engineering Department, University of Mosul, Mosul - Iraq
  • Abdullah M. Rashed Road Construction Department, Duhok Polytechnic University, Kurdistan Region - -Iraq

Abstract

Short and long term aging were conducted on the dense graded asphalt mixtures (DGAMs) containing 40-50 penetration grade asphalt cement binders. The short term oven aging (STOA) was conducted on loose mixtures at temperature of 135 °C for four hours and at temperature of 154 °C for two hours, whereas, the long term oven aging (LTOA) was conducted at temperature of 85 °C and at two periods of time between four and eight days. Marshall properties, tensile and compressive strength at 25 and 60°C, flexural strength at 0 and -10°C, cohesion at 60°C, tensile strength ratio, and index of retained strength were carried out on unaged and aged DGAM. A mechanistic-empirical design approach using BISAR program was adopted for estimating the improvement in service life of the pavement or reduction in thickness of DGAM and base layer for the same service life due to the aging of DGAM. The results showed that the STOA and LTOA: (1) increases resistance of DGAM against permanent deformation, stripping, and flexural strength; (2) increases traffic benefit ratio between 10 and 20%; (3) reduces the thickness of the surface layer between 8 and 14%; and (4) the base thickness reduces between 35% and 57%.

References

1. AASHTO Designation: R30, America Association of State Highway and Transportation Officials. (2002). Practice for Short and Long Term Aging of Hot Mix Asphalt (HMA): Washington, D.C.
2. Al-Hadidy & Tan Yi-Qiu., (2007). Long-Term Aging of Polypropylene Asphalt Paving Mixtures. Proceeding of the 26th Southern African Transport Conference (SATC 2007), 9-12 July 2007. P761-767. ISNB Number: 1-920-01702-X Pretoria, Accepted as a Word Cup 2010 Traffic Simulation.
3. Al-Hadidy A.I. (2009). Characterization of Polymer Modified Road Building Materials: Laboratory and Field Evaluation: Ph.D. dissertation, School of Transportation and communication, Harbin Institute of Technology, China.
4. American Society for Testing and Materials (ASTM) (2004): Standard Specification, Section 4, Vol. 04-03.
5. Asphalt Institute (1984): Mix design method for asphalt concrete and other hot-mix types (MS-2).
6. Asphalt Institute (2002): Superior performing asphalt pavement”. Mix design series, No. 2, (SP-2).
7. Bell, A., C., Alan, J., W., & Marco J. F., (1994): Laboratory Aging of Asphalt-Aggregate Mixtures: Field Validation. SHRP-A-390, Strategic Highway Research Program, Oregon State University, National Research Council, Washington, D.C.
8. Bradley, J. Putman, & Serji, N. A, (2004). Utilization of waste fibers in stone matrix asphalt mixtures. Journal of Resources Conservation and Recycling. (42):265-274.
9. Busby EQ. & Rader LF. (1972). Flexural stiffness properties of asphalt concrete at Low temperatures. Proceedings, AAPT, Vol.41:163-187.
10. John, R. & David, W. (2003): The Shell Bitumen Hand Book. 5th Ed., Thomas Telford Ltd., pp.157-163,213,214.
11. Masson J-F, Pelletier L., & Collins P., (2001). Rapid FTIR Method for Styrene-Butadiene Type Copolymers In Bitumen. NRCCNRC.
12. State cooperation of road and bridges (2003): Hot mix asphaltic concrete pavement. Iraqi standard specification, Ministry of Housing and Construction. Department of Design and Study, Section R-9.
13. SPSS (1999): Inc. version 10.0.5, Chicago IIIinois.
14. Soon-Jae Lee, Serji N. Amirkhanian, & Kwang W. Kim (2009). Laboratory Evaluation of the Effect of Short-Term Oven Aging on Asphalt Binders in Asphalt Mixtures Using HP-GPC. Journal of Construction and Building Material. Volume 23, Issue 9, Pages 3087-3093.
15. Soon-Jae Lee A., et.al. (2007). Short-Term Aging Characterization of Asphalt Binders Using Gel Permeation Chromatography and Selected Superpave Binder Tests. Journal of Construction and Building Materials. Volume 22, Issue 11, Pages 2220-2227.
16. Yang H.H. (2012): Pavement Analysis and Design. Prentice-Hall, Inc., A Paramount Communications Company, Englewood Cliffs, New Jersey 07632, USA: 57, 98.
Published
2018-12-21
How to Cite
A.I., Al-Hadidy; RASHED, Abdullah M.. Effect of Oxidative Aging on the Engineering Properties of DGAMs. Academic Journal of Nawroz University, [S.l.], v. 7, n. 4, p. 50-66, dec. 2018. ISSN 2520-789X. Available at: <http://journals.nawroz.edu.krd/index.php/ajnu/article/view/271>. Date accessed: 16 june 2019. doi: https://doi.org/10.25007/ajnu.v7n4a271.
Section
Articles