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2025 Vol.15, Issue 2 Preview Page

Scientific Paper

Statistical data analysis of deformation strength (SD) level of various field asphalt mixtures

현장 아스팔트혼합물 변형강도(SD) 수준의 통계적 분석 연구

Wonbae Kim1
,
Chaehyeon Kim2
,
Ye-eun Kim3
,
Kyong K. Yun4
,
Kwang W. Kim5*
김 원배1
,
김 채현2
,
김 예은3
,
윤 경구4
,
김 광우5*
1Graduate Student, Civil Engineering Dept., Graduate School, Kangwon National University
2Senior Researcher, Research Center, GK Tech
3Director, Research Center, GK Tech
4Professor, Civil Engineering Dept., Kangwon National University
5Professor Emeritus, Regional Infrastructure Engineering Dept., Kangwon National University
1강원대학교 대학원 토목공학과 박사과정
2지케이테크 선임연구원
3지케이테크 이사
4강원대학교 토목공학과 교수
5강원대학교 지역건설공학과 명예교수
*Corresponding Author
31 December 2025. pp. 318-329
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Abstract

The deformation strength (SD) was developed to create a load-induced spot deformation which is similar to the one created by a static wheel, and to measure the material’s resistance against the deformation at high temperatures. The SD is currently used as a mix-design criteria for rut resistance of asphalt pavement mixture. The criteria for the surface course of 2nd class road pavement and of 1st class highway pavement are SD3.2 MPa and SD4.25 MPa, respectively, which were set forth by Ministry of Land, Infrastructure and Transport, Republic of Korea. However, not many statistical data of field asphalt mixtures were collected and evaluated yet. Therefore, in this study, random samples of 31 PG64-22 (normal asphalt) mixtures and 18 PG76-22 (polymer-modified asphalt: PMA) mixtures for surface course were collected from nation-wide field sites. Three specimens (100 mm in diameter) were made using a gyratory compactor for measuring SD for each site mixture. The statistical data for SD were analyzed to estimate population mean and standard deviation. Assuming the SD population follows normal distribution, the current process mean of SD (SD¯) was found for each binder mixture (64-22 and 76-22). Statistical data shows that both SD means satisfied the respective mix-design criterion. The coefficient of variation (Vc) of normal mixes was approximately 10%, which is decent level of variation, and Vc of PMA mixes were found to be 8.63%, which is lower than that of normal mixes. In general, the strength quality in the field mixes was found to be controlled properly in SD point of view.

Keywords
Asphalt concrete
Deformation strength (SD)
Mean
Standard deviation
Coefficient of variation
Field mixture
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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 : 15
  • No :2
  • Pages :318-329
  • Received Date : 2025-12-19
  • Revised Date : 2025-12-26
  • Accepted Date : 2025-12-26
  • DOI :https://doi.org/10.22702/jkai.2025.15.2.28
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