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Scientific Paper

Computation of Thermal Stress (TS) on asphalt mixture with simple Power law function Transformation Approach (PTA) procedure
Moon Ki-Hoon1*
1Senior Researcher (Ph.D.), Korea Expressway Corporation Pavement Research Division (KECPRD)
* Corresponding Author
30 June 2020. pp. 129-137
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Abstract

It is well known that low temperature cracking in one of the serious distresses on asphalt pavement especially for northern U.S., Canada and South Korea. Water and moisture can easily be infiltrated into asphalt pavement surface due to low temperature cracking and this leads to further crucial pavement distress such as several macro cracking, fatigue cracking and pot hole issues. Due to this reason, many pavement agencies in U.S. and Canada put lots of effort to maintain asphalt pavement at certain level especially at cold weather session. Thermal Stress (TS) is the key factor for estimating resistance level of certain asphalt material against low temperature cracking. Normally low temperature creep testing with complicated mathematical works are needed for TS computation. Because of this reason, not many pavement agencies and universities could derive TS results of asphalt material easily. In this paper, a simple Power-law function Transformation Approach (PTA) procedure for TS computation was developed and introduced. Two asphalt mixtures with In-Direct Tensile (IDT) testing was considered for experimental work. It was found that the simple PTA procedure can successfully compute TS results at reasonable level.

Keywords
Low temperature cracking
Thermal Stress (TS)
Power-law function Transformation Approach (PTA)
In-Direct Tensile (IDT) test
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 :129-137
  • Received Date : 2020-06-03
  • Revised Date : 2020-06-08
  • Accepted Date : 2020-06-16
  • DOI :https://doi.org/10.22702/jkai.2020.10.1.012
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