Analysing the potential use of a low-grade magnesium carbonate by-product as a filler in hot asphalt mixtures

ABSTRACTClimate change and the depletion of natural resources are causing society to adopt more environmentally sustainable approaches. In areas such as construction and civil engineering, waste and by-product valorisation could help in the fight against climate change, reducing the consumption of raw materials. Thus, the use of residues or by-products in asphalt mixture manufacturing as road pavement layers has great potential due to their characteristics. This study aimed to characterise a flotation sterile (low-grade magnesium carbonate; LG-MC) generated in the beneficiation process of natural magnesite and to analyse its potential as a filler in asphalt mixture manufacturing. The physical, chemical, and microscopic properties of LG-MC were characterised and its potential use as a filler for asphalt mixtures was evaluated using the UCL (Universal de Caracterización de Ligantes) method. The optimum filler/bitumen ratio for LG-MC was 1.49, higher than the 1.33 of calcium carbonate. Results showed a protective effect of LG-MC against ageing both in the short and long- term, reducing losses from abrasion.

• Record URL:
  • https://doi.org/10.1080/10298436.2022.2083618
• 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:
  • López-Montero, Teresa
  • Maldonado-Alameda, Alex
  • Mañosa, Jofre
  • Miró, Rodrigo
  • Chimenos, Josep Maria
• Publication Date: 2023

Language

• English

Media Info

• Media Type: Web
• Features: References;
• Pagination: 2083618
• 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: Aging (Materials); Carbonates; Fillers (Materials); Hot mix asphalt; Magnesium; Sustainable development
• Subject Areas: Highways; Materials; Pavements;

Filing Info

• Accession Number: 01914020
• Record Type: Publication
• Files: TRIS
• Created Date: Apr 6 2024 5:01PM