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2024 Vol.13, Issue 2 Preview Page

Scientific Paper

Effect of warm-mix additives on the fracture toughness and aging of asphalt binders and mixtures

중온 첨가제가 아스팔트 혼합물의 파괴인성 및 노화량에 미치는 상관성에 관한 연구

Soon yong An1
,
Tae Soon Park2*
,
Kwang W. Kim3
안 순용1
,
박 태순2*
,
김 광우3
1Ph.D, Responsible Technician. of national highway construction, Dongmyeong Engineering Consultants, Seoul, 05203, Korea
2Professor, Dept. of Civil Engineering, Seoul National University of Science & Technology, Seoul, 01811, Korea
3Professor, Dept. of Regional Infrastructures Engineering, Kangwon National University, Chuncheon, 24341, Korea
1㈜동명기술공단, 부사장(박사)
2서울과학기술대학교 건설시스템공학과 교수(박사)
3강원대학교 교수(박사)
*Corresponding Author
17 January 2024. pp. 372-386
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Abstract

The carbon neutrality movement, which is emerging globally, has made carbon dioxide reduction a necessary topic, not an option, to reduce greenhouse gases due to climate change. In order to realize this theme, we actively protect the environment by dramatically reducing carbon dioxide emitted from heated asphalt and saving fuel. In order to adapt to environmental issues such as fine dust and climate change, the aggregate heating temperature is increased from 165°C to 135°C. The WMA method, a groundbreaking packaging method that lowers the temperature by 30°C, was developed. However, asphalt mixture is a ductile or viscoelastic material at room temperature, but becomes a brittle material similar to cement concrete at sub-zero temperatures. The low-temperature KIC value of the asphalt mixture presented in previous studies was confirmed to be in the range of 0.6 to 2.2 In addition, it is important to identify mechanical properties related to fracture crack resistance, referred to as the critical stress intensity coefficient or KIC, of asphalt mixtures at low temperatures, and extensive attempts are being made to improve low-temperature properties. Therefore, in this study, based on the research results of several researchers on WMA, the moisture present inside the aggregate of WMA and HMA and the aging of the asphalt binder may be more susceptible to low-temperature brittle fracture at a slightly higher temperature than general WMA. This study was conducted to investigate the effect and influence of the fracture toughness of produced polymer-modified WMA and polymer-modified HMA and their correlation with aging amount.

Keywords
Warm mix asphalt
Indirect tensile strength test
Fracture toughness
AQ
Kim test
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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 : 13
  • No :2
  • Pages :372-386
  • Received Date : 2023-12-03
  • Revised Date : 2024-01-04
  • Accepted Date : 2024-01-12
  • DOI :https://doi.org/10.22702/jkai.2023.13.2.31
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