Effect of modified heavy calcium carbonate on properties of crumb rubber modified asphalt binder

ABSTRACTHigh-temperature rutting is one of the common forms of pavement damage. To further improve the high temperature performance of crumb rubber modified asphalt (CRMA) pavement, heavy calcium carbonate (HCC) modified by sodium pyrophosphate was combined with crumb rubber to prepare composite modified asphalt binder. Their physical properties, viscoelastic properties and chemical composition were investigated through conventional physical tests, DSR, FTIR and fluorescence microscopes. The results show that with the increase of HCC content, the mixing and compaction temperatures of composite modified asphalt binders continued to increase. Further, the high temperature performance and fatigue resistance of binders were better than the original CRMA, due to the enhanced lipophilicity of HCC after modification. It can be found from the FTIR spectrum that the addition of HCC only existed in physical action. However, excessive HCC would cause agglomeration of the asphalt matrix, so the optimum dosage of HCC was determined to be 4%.

• Record URL:
  • https://doi.org/10.1080/10298436.2022.2144308
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/oclc/44544515
• Supplemental Notes:
  • © 2022 Informa UK Limited, trading as Taylor & Francis Group 2022. Abstract reprinted with permission of Taylor & Francis.
• Authors:
  • Chen, Mingyuan
  • Geng, Jiuguang
  • Gao, Zichen
  • Wang, Wenhao
  • He, Leilei
  • Niu, Yanhui
• Publication Date: 2023

Language

• English

Media Info

• Media Type: Web
• Features: References;
• Pagination: 2144308
• Serial:
  • International Journal of Pavement Engineering
  • Volume: 24
  • Issue Number: 2
  • Publisher: Taylor & Francis
  • ISSN: 1029-8436
  • Serial URL: http://www.tandf.co.uk/journals/titles/10298436.html

Subject/Index Terms

• TRT Terms: Bituminous binders; Calcium carbonate; Crumb rubber; High temperature; Rheological properties; Rutting
• Subject Areas: Highways; Materials; Pavements;

Filing Info

• Accession Number: 01911699
• Record Type: Publication
• Files: TRIS
• Created Date: Mar 12 2024 11:05AM