Influence of a Flexibilizer on Physical Properties of Crumb Rubber Modified Asphalt Sealants

폐타이어 고무분말 개질 아스팔트 실란트의 물리적 특성에서 유연제의 영향

  • 김종석 (전북대학교 공과대학 화학공학부)
  • Received : 2009.03.13
  • Accepted : 2009.07.30
  • Published : 2009.09.15


The use of the crumb rubber as an asphalt binder modifier may contribute to road maintenance and repair. The adhesion properties of the crumb rubber modified asphalt (CRMA) sealant have attracted interest due to brittle and adhesion failure of asphalt binders at low temperatures. In this study, the influence of a flexibilizer as a modifier for CRMA at low temperatures was investigated. Their properties were measured using the penetration, the softening point, the tensile and tensile adhesion tests at low temperature. The tensile adhesion strength and the strain of CRMAs were increased with increasing ductile deformation of the CR and the asphalt binder in the flexiblizer modified CRMAs. It was found that the flexibilizer concentration was an important factor for tensile and adhesion properties of CRMAs at low temperatures.


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