Investigation of Long-term Performance of Warm Mix Asphalts Containing EAF Steel Slag

Document Type : Research Paper

Authors

null

Abstract

 
Due to sustainable development, environmental concerns caused by air pollution, expansion of development projects, and limitations of mineral aggregates, reduction of construction temperature of asphalt mixtures and use of secondary materials as substitute for aggregate materials is inevitable. In this research, long-term performance of warm asphalt mixtures containing steel slag was investigated. Limestone aggregates and steel slag of Electric Arc Furnace (EAF) were the main materials and Sasobit was used as an additive in manufacturing warm asphalt mixtures. Using 1.5% Sasobit, with respect to bitumen’s weight, decreased temperature of the asphalt mixtures by 20 °C. In order to simulate short-term and long-term aging of asphalt samples, AASHTO R35 and AASHTO R30 standards were used. Sasobit was mixed with asphalt by conventional mixer and high-shear mixer. Traditional and SHRP tests conducted on mixtures indicated that Sasobit is insensitive to mixing conditions. Performance of asphalt samples was evaluated by Marshall stability test, resilient modulus test, indirect tensile strength test, moisture susceptibility test and dynamic creep test. Finally, quantitative growth of the results for each sample, with respect to hot calcareous asphalt mixture, was presented. In general, using slag as calcareous substitute caused higher aging of asphalt mixtures. Also, hot asphalt samples, as compared to warm asphalt mixtures, were more sensitive to aging. As warm asphalt mixtures containing EAF steel slag, with respect to other asphalt mixtures, have shown long-term and short-term performance, therefore, they are recommendable.
 

Keywords

References

سازمان مدیریت و برنامه‌ریزی کشور. 1391. "آیین­نامه روسازی راه‌های ایران". نشریه 234، تجدید نظر اول.
AASHTO T283. 1989. “Standard method of test for resistance of compacted bituminous mixture to moisture induced damage”. 19th Edn., American Association of State Highway and Transportation Officials.
Ahmedzade, P. and Sengoz, B. 2009. “Evaluation of steel slag coarse aggregate in hot mix asphalt concrete”. J. Hazard. Mater., 165(1): 300-305.
Ameri, M., Hesami, S. and Goli, H. 2013. “Laboratory evaluation of warm mix asphalt mixtures containing electric arc furnace (EAF) steel slag”. Constr. Build. Mater., 49: 611-617.
Arabani, M. and Azarhoosh, A. R. 2012. “The effect of recycled concrete aggregate and steel slag on the dynamic properties of asphalt mixtures”. Constr. Build. Mater., 35: 1-7.
Asi, I. M., Qasrawi, H. Y. and Shalabi, F. I. 2007. “Use of steel slag aggregate in asphalt concrete mixes”. Can. J. Civil Eng., 34(8): 902-911.
Bonaquist, R. F. 2011. “Mix design practices for warm mix asphalt”. Transport. Res. Board, Vol. 691.
Kavussi, A. and Qazizadeh, M. J. 2014. “Fatigue characterization of asphalt mixes containing electric arc furnace (EAF) steel slag subjected to long term aging”. Constr. Build. Mater., 72: 158-166.
Pasetto, M. and Baldo, N. 2010. “Experimental evaluation of high performance base course and road base asphalt concrete with electric arc furnace steel slags”. J. Hazard. Mater., 181(1): 938-948.
Rubio, M. C., Martínez, G., Baena, L. and Moreno, F. 2012. “Warm mix asphalt: An overview”. J. Cleaner Prod., 24: 76-84.
Journal of Transportation Infrastructure Engineering
Volume 2, Issue 4
February 2017
Pages 23-42

Files

History

  • Receive Date: 25 July 2016
  • Revise Date: 30 December 2016
  • Accept Date: 07 January 2017

Share

How to cite

Statistics