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Scientific Paper

Mechanical performance evaluation of taconite aggregate in asphalt pavement construction
Augusto Cannone Falchetto1
,
Ki Hoon Moon2*
,
Sang Gab Cho34
1Assistant Professor, Department of Civil Engineering, Aalto University
2Principal Researcher, Korea Expressway Corporation R&D Planning Division
3Ph.D. Candidate, Department of civil engineering, Seoul national University of Science And Technology
4Pro, Green Solution Business Development Team 1, SK Ecoplant
*Corresponding Author
18 July 2022. pp. 155-164
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Abstract

Using alternative aggregate source is essential in asphalt pavement industry not only for saving construction budget but also for mitigating environmental pollution issue. In U.S. northern Minnesota territory, amount of taconite aggregate: a byproduct of taconite mining industries, are produced annually. If taconite aggregate is successfully used as an alternative aggregate source, more economical and environment friendly asphalt mixture can be achieved. Many studies presented the possibility of taconite aggregate application in road construction. In this paper, suitability investigation of using taconite aggregate is performed by means of mechanical test: low temperature Indirect Tensile (IDT) creep test. A parameter for low temperature cracking resistance: creep stiffness (and corresponding relaxation modulus) result, is computed then compared visually. It was found that the asphalt mixture mixed with coarse taconite aggregate and limestone filler presented reasonable mechanical performance compared to the conventional asphalt mixture. This finding provides possibility of taconite aggregate application in actual asphalt pavement construction.

Keywords
Taconite aggregate
Indirect Tensile (IDT) test
Creep compliance
Relaxation modulus
Mechanical performance
References
1
AASHTO (2003). Determining the creep compliance and strength of Hot Mix Asphalt using the Indirect Tensile Test (IDT) device, AASHTO T322-03, American Association of State Highway and Transportation Officials, Washington D.C.
2
Cannone Falchetto, A., Moon, K.H., Wang, D. and Park H.W. (2021). “A modified rheological model for the dynamic modulus of asphalt mixtures”, Canadian Journal of Civil Engineering, 48, pp. 328-340. 10.1139/cjce-2019-0392
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Moon, K.H. (2010). Comparison of thermal stresses calculated from asphalt binder and asphalt mixture creep compliance data, M.S. thesis, University of Minnesota Twin Cities, United States (U.S.).
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Moon, K.H. (2012). Investigation of asphalt binder and asphalt mixture low temperature properties using analogical models. Ph.D. thesis. University of Minnesota Twin Cities, United States (U.S.).
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Zanko, L.M., Niles, H.B. and Oreskovich, J.A. (2003). Properties and aggregate potential of coarse taconite tailings from five Minnesota taconite operations, Technical report NRRI/TR-2003/44; and local road research board report number 2004-06, Natural Resources Research Institute, University of Minnesota Duluth, United States (U.S.), 227p.
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Information
  • Publisher :KOREAN ASPHALT INSTITUTE
  • Publisher(Ko) :한국아스팔트학회
  • Journal Title :Journal of the Korean Asphalt Institute
  • Journal Title(Ko) :한국아스팔트학회지
  • Volume : 12
  • No :1
  • Pages :155-164
  • Received Date : 2022-06-08
  • Revised Date : 2022-06-28
  • Accepted Date : 2022-06-30
  • DOI :https://doi.org/10.22702/jkai.2022.12.1.15
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