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Evaluation of Characteristics of Tack Coat for Porous Pavement using Direct Shear Test  

Kim, Nak-Seok (경기대학교 토목환경공학부)
Hong, Eun-Cheol (경기대학교 일반대학원 토목공학과)
Jo, Shin-Haeng (유진기업 기술연구소)
Publication Information
Journal of the Korean Society of Hazard Mitigation / v.9, no.1, 2009 , pp. 27-32 More about this Journal
Abstract
The main objective of this study is to develop a test for measuring the bond shear strength between pavement layers. The research is also conducted to evaluate tack coat materials and application rate in porous pavement. The experiment includes using two types of emulsions (RSC-4, Modified Emulsion) and a asphalt binder type (HM-1). HM-1 was developed to be applied in porous pavement. The bond shear strengths were measured by a direct shear type device under various test conditions. The shear strength may not be appropriate in the evaluation of the bond shear strength, while the toughness of the test may be useful. In case of the tack coat application rate in porous pavement, RSC-4 has to be used a minimum amount of $0.8l/m^2$ and modified emulsion asphalt has to be applied a volume of use $0.5{\sim}0.6l/m^2$. HM-1, asphalt cement type, is far stronger bond shear strength than emulsified asphalt tack coat and had showed the excellent trackless property.
Keywords
Tack coat; Bond shear strength; Direct shear test; Toughness;
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