Synthesis of Hydroxyapatite-Polydopamine-Rubber powder modifier via in-situ growth strategy for the designing of HAP-PDA-RP/SBS modified asphalt

Based on the impact resistance of hydroxyapatite (HAP) and the adhesion of polydopamine (PDA), in situ biomimetic mineralization strategy was used to grow HAP-PDA coatings on the surface of rubber powder (RP) to prepare HAP-PDA-RP, which was in turn applied as a modifier to prepare styrene–butadienestyrene (SBS) modified asphalt (SBS-MA). XRD, Raman and XRF analyses confirmed the successful synthesis of HAP monomers. EDS and SEM showed that HAP-PDA is successfully attached to the surface of RP while FM test revealed a clear cross-linked network structure in HAP-PDA-RP modified SBS-MA (HAP-PDA-RP/SBS-MA). DSR test results indicated that at 46 °C, the storage modulus and loss modulus of 15%HAP-PDA-RP/SBS-MA were 27.9% and 24.5% higher than those of 10%RP/SBS-MA respectively. MSCR tests showed that compared to the strain of SBS-MA, the strain of 15%HAP-PDA-RP/SBS-MA was decreased by 78.5% and 65.0% at 0.1 kPa and 3.2 kPa stress levels, respectively. This study provided a facile and convenient strategy for the preparation of HAP-PDA-RP/SBS-MA with significantly superior mechanical and thermal properties for practical applications in construction and road industries.

• Record URL:
  https://doi.org/10.1016/j.conbuildmat.2022.128361
• Record URL:
  http://www.sciencedirect.com/science/article/pii/S0950061822020219
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/09500618
• Supplemental Notes:
  • © 2022 Elsevier Ltd. All rights reserved. Abstract reprinted with permission of Elsevier.
• Authors:
  • Li, Jing
  • Wang, Shanshan
  • Muhammad, Yaseen
  • Zhang, Honggang
  • Qiao, Qichen
• Publication Date: 2022-8-22

Language

• English

Media Info

• Media Type: Web
• Features: References;
• Pagination: 128361
• Serial:
  • Construction and Building Materials
  • Volume: 345
  • Issue Number: 0
  • Publisher: Elsevier
  • ISSN: 0950-0618
  • Serial URL: http://www.sciencedirect.com/science/journal/09500618?sdc=1

Subject/Index Terms

• TRT Terms: Asphalt additives; Coatings; Powders; Rubber; Styrene butadiene styrene
• Subject Areas: Highways; Materials; Pavements;

Filing Info

• Accession Number: 01856721
• Record Type: Publication
• Files: TRIS
• Created Date: Aug 30 2022 9:18AM