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2020 Vol.10, Issue 1 Preview Page

Scientific Paper

Problems in dynamic stability assessment of asphalt concrete in Korea and suggestion

국내 아스팔트 콘크리트의 동적안정도 산정의 문제점 및 제언

Gyu Tae Cho1
,
Yeong-Sam Kim2*
,
Sung-Un Kim3
,
Kwang-woo Kim4
조 규태1
,
김 영삼2*
,
김 성운3
,
김 광우4
1Professor, Department of Civil Engineering, Yeungnam University
2Doctorate Completion, Department of Regional lnfrastructure Engineering, Kangwon National University
3Lecturer, Department of Regional lnfrastructure Engineering, Kangwon National University
4Professor Emeritus, Department of Regional lnfrastructure Engineering, Kangwon National University
1영남대학교 건설시스템공학과 교수
2강원대학교 지역건설공학과 박사수료
3강원대학교 지역건설공학과 전임강사
4강원대학교 지역건설공학과 명예교수
* Corresponding Author
30 June 2020. pp. 14-26
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Abstract

The dynamic stability (DS) assessed from the wheel tracking test of asphalt concrete is a property representing the resistance level against rutting in terms of the number of pass to induce 1 mm of rut depth. Therefore, in principle, the higher DS is assessed from the stronger asphalt concrete material, and the weaker asphalt concrete will show deeper rut depth in WT test, showing lower DS. However, since the DS specified by KS (DSKS) is calculated from the wheel tracking (WT) test result, based on the data from last 15 min out of 60 min test, the DSKS result is not well always matched with the principle concept. According to regression of DS values assessed by DSKS with final rut depths of 40 WT test data, the coefficient of determination (R2) was observed to be only 0.285. However, when the values of DSNew suggested by Kim and Doh in 2006 was used for the regression using the same 40 WT data, the R2 was observed to be only 0.925, showing much better correlation between DS and final rut depth. Therefore, it is suggested that a study should be performed to develop a new DSKS or use the DSNew by modifying current form if need, or discard DS and just use the final rut depth like many other countries.

Keywords
Wheel tracking
Dynamic Stability (DS)
DSKS
DSNew
final rut depth
asphalt concrete
References
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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 : 10
  • No :1
  • Pages :14-26
  • Received Date : 2020-05-26
  • Revised Date : 2020-06-12
  • Accepted Date : 2020-06-16
  • DOI :https://doi.org/10.22702/jkai.2020.10.1.002
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