Evaluation of the Use of Steel Slag as Asphalt Mix Aggregate to Mitigate Studded Tire Wear

Studded tire wear leads to severe deterioration of pavement. Therefore, the reduction of studded tire wear is urgently needed to improve asphalt pavement conditions and save repair costs. Steel slag is a co-product of the steel industry and features high hardness, when compared to conventional crushed aggregate, such as granite and limestone. This study evaluates the performance of hot mix asphalt (HMA) that contains steel slag aggregate (SSA) as a surface material to mitigate the studded tire wear. The physical properties of SSA were assessed to determine its suitability in HMA. Four percentages (0%, 20%, 40% and 60%) of SSA were used in asphalt mix, and the mix designs for HMA are conducted in accordance with Superpave mix design. The performance of the mixes was evaluated comprehensively in terms of studded tire wear, dynamic modulus, flow number, fracture properties at intermediate and low temperatures, and Hamburg wheel-tracking device testing. The results indicate that the addition of steel slag increases studded tire wear resistance, dynamic modulus values, thermal cracking resistance, and rutting resistance. In addition, the inclusion of SSA had no effect on top-down fatigue cracking resistance, and moisture susceptibility. Based on these laboratory test results, SSA could be especially beneficial in the Northwest region of the United States in surface course where studded snow tires are used and thus extends the service life of the pavement.

• Supplemental Notes:
  • This paper was sponsored by TRB committee AFK40 Characteristics of Asphalt-Aggregate Combinations to Meet Surface Requirements. Alternate title: Evaluation of Use of Steel Slag as Asphalt Mix Aggregate to Mitigate Studded Tire Wear
• Corporate Authors:

  Transportation Research Board

  500 Fifth Street, NW
  Washington, DC  United States  20001
• Authors:
  • Wen, Haifang
  • Wu, Shenghua
  • Bhusal, Sushanta
• Conference:
  • Transportation Research Board 94th Annual Meeting
  • Location: Washington DC, United States
  • Date: 2015-1-11 to 2015-1-15
• Date: 2015

Language

• English

Media Info

• Media Type: Digital/other
• Features: Figures; Photos; References; Tables;
• Pagination: 16p
• Monograph Title: TRB 94th Annual Meeting Compendium of Papers

Subject/Index Terms

• TRT Terms: Aggregate mixtures; Hot mix asphalt; Laboratory tests; Mix design; Pavement performance; Service life; Slag; Steel; Studded tires; Wear
• Geographic Terms: Northwestern United States
• Subject Areas: Design; Highways; Materials; Pavements; I22: Design of Pavements, Railways and Guideways; I31: Bituminous Binders and Materials; I34: Steels and Metals; I36: Aggregates;

Filing Info

• Accession Number: 01555082
• Record Type: Publication
• Report/Paper Numbers: 15-3907
• Files: TRIS, TRB, ATRI
• Created Date: Feb 26 2015 10:03AM