Use of Basic Oxygen Furnace Slag (BOFS) in Superpave Mix Design: BOFS Aggregate Properties

Abstract:

This research aims to evaluate the properties of basic oxygen furnace slag (BOFS) as aggregates used in Superior Performing Asphalt Pavements (Superpave) mix design. A total of five different aggregates, including one limestone and four BOFS aggregates with different ages, were evaluated by the following aggregate properties: specific gravity, water absorption, Los Angles abrasion, aggregate crushing value, angularity, flakiness, soundness (sulfate chemical and freeze-thaw resistance), and expansion characteristics. Then, the volume stability of the hot mix asphalt (HMA) mixture was also discussed based on the aging effect of BOFS aggregate. Test results indicated that aged BOFS aggregate performs better than unaged BOFS aggregate: Aged BOFS aggregate has lower water absorption, lower aggregate crushing value, higher abrasion resistance, and less expansion. The flakiness and angularity of BOFS aggregates were satisfied with Superpave criteria. However, if free-lime (f-CaO) and free magnesium (f-MgO) in BOFS aggregate exist, it may cause the volume stability of asphalt mixtures with BOFS aggregate. In conclusion, if BOFS is appropriately aged and weathered, BOFS can be an alternative to conventional aggregate.

• Periodical: Key Engineering Materials (Volume 951)
• Pages: 147-154
• DOI: https://doi.org/10.4028/p-guZBG4
• Online since: August 2023
• Authors: Chang Seon Shon*, Jong Ryeol Kim, Aizhan Kissambinova, Saken Sandybay, Saltanat Orazayeva, Nurzhan Dossayev, Pavel Chzhen
• Keywords: Aggregate Properties, Basic Oxygen Furnace Slag, Expansion, Superpave

References

[1] NHI. 2000. NHI Course #131053 Superpave Fundamentals Reference Manual. FHWA-NHI131053. National Highway Institute, Washington, DC. https://idot.illinois.gov/Assets/uploads/files/Transportation-System/Manuals-Guides-&-Handbooks/T2/P028.pdfp. 119

[2] Y.-R. Kim, F. Aragao, and J. Lutif. Restricted-Zone Requirements for Superpave Mixes Made with Local Aggregate Sources, NDOR Research Project Number P556 (2006).

[3] R.C. Williams, A. Buss, J. Podolsky, H.D. Lee. Y. Validation of Gyratory Mix Design in Iowa – Phase II, IHRB Project TR-742 (2021).

[4] R. Cominsky, R.B. Leahy, E.T. Harrigan. Level One Mix Design: Materials Selection, Compaction, and Conditioning. SHRP A-408 report (Level One Mix Design: Materials Selection, Compaction, and Conditioning (1994).

[5] J.G. Speight. Asphalt Materials Science and Technology. 1st edition, Amsterdam, Butterworth-Heinemann (2015)

[6] Y.J. Xue, S.P. Wu, H.B. Hou. J. Zha. Experimental investigation of basic oxygen furnace slag used as aggregate in asphalt mixture. J. Hazard. Mater, 138, 261–268, (2006)

DOI: 10.1016/j.jhazmat.2006.02.073

[7] J. Xie, S. Wua, J. Lin, J. Cai, Z. Chen, W. Wei. Recycling of basic oxygen furnace slag in asphalt mixture: Material characterization & moisture damage investigation. Constr. Build. Mater. 36, 467–474, (2012)

DOI: 10.1016/j.conbuildmat.2012.06.023

[8] L-S. Huang. Evaluation of the Cooling and Pavement Performance of Basic Oxygen Furnace Slag Used in Asphalt Mixture. Applied Sciences. 7(12):1226, (2017)

DOI: 10.3390/app7121226

[9] H. Wen, S. Wu, S. Bhusal. Performance evaluation of asphalt mixes containing steel slag aggregate as a measure to resist studded tire wear. Road Materials and Pavement Design, DOI: 10.1080/14680629.2019.1620120, (2015).

DOI: 10.1061/(asce)mt.1943-5533.0001475

[10] M.L. Pattanaik, R. Choudhary, B. Kumar, and A. Kumar. Mechanical properties of open graded friction course mixtures with different contents of electric arc furnace steel slag as an alternative aggregate from steel industries. Road Materials and Pavement Design, 22(2), (2021)

DOI: 10.1080/14680629.2019.1620120

[11] H. Ziari, S. Nowbakht, S. Rezaei, and A. Mahboob. Laboratory investigation of fatigue characteristics of asphalt mixtures with steel slag aggregates. Advances in Materials Science and Engineering, 1–5, (2015).

DOI: 10.1155/2015/623245

[12] Z. Chen, S. Wu, Y. Xiao, W. Zeng, M. Yi, and J. Wan. Effect of hydration and silicone resin on Basic Oxygen Furnace slag and its asphalt mixture. Journal of Cleaner Production, 112, 392–400, (2016)

DOI: 10.1016/j.jclepro.2015.09.041

[13] Y. Ye, S. Wu, C., Li, D. Kong, B. Shu. Morphological discrepancy of various basic oxygen furnace steel slags and road performance of corresponding asphalt mixtures, materials. 12(14):2322, (2019)

DOI: 10.3390/ma12142322

[14] Z. Liu, X. Li, D. Deng, G.D. Schutter, and L. Hou. The role of Ca(OH)2 in sulfate salt weathering of ordinary concrete, Constr. Build. Mater. 123, 127–134, (2016)

DOI: 10.1016/j.conbuildmat.2016.07.006

[15] A. Tukaziban, C.-S. Shon, I. Orynbassarov, S. Sandybay, D. Syzdykov, D. Zhang, and J.R. Kim. Mechanical, swelling, and thermal properties of geopolymer mixture containing basic oxygen furnace slag aggregates, In: IOP Conference Series: Earth and Environmental Science. 1050, 1, 012021, (2022).

DOI: 10.1088/1755-1315/1050/1/012021