A Modification Mechanism Study of Buton Natural Rock Asphalt in a Matrix Asphalt and Asphalt Mixture

Embedded in the seabed, Budon natural rock asphalt (BRA) is one type of minerals with Paleozoic oil penetrated into the rock stratum. It has withstood compression due to geological movement, and becomes an excellent asphalt modifier because of its high asphalt content and plentiful micropores. Usually, BRA consists of 25% to 30% of bitumen and 70% to 75% of natural mineral. Through the testing of using 20% and 25% BRA as a substitute for A-level 70 matrix asphalt, it was found that BRA not only increases the penetration depth, softening point, and viscosity of asphalt mixture, but also improves the temperature stability. Since BRA contains high-alkali minerals that have high ionic adsorption ability, it is possible to enhance the adhesion between binder and aggregate, and to improve the resistance of moisture susceptibility. In this study, it is concluded that the effects of BRA modification are better those of SBS because BRA has higher durability and better performance in antioxidant ability, anti-aging ability and durability.

Language

  • English

Media Info

  • Media Type: Web
  • Pagination: pp 155-162
  • Monograph Title: Geo-China 2016: Innovative and Sustainable Solutions in Asphalt Pavements

Subject/Index Terms

Filing Info

  • Accession Number: 01609679
  • Record Type: Publication
  • ISBN: 9780784480052
  • Files: TRIS, ASCE
  • Created Date: Jul 21 2016 3:06PM