Study on crack resistance of cement-stabilized iron tailings

ABSTRACTIron tailings constitute a significant type of industrial solid waste. The use of iron tailings to wholly or partly substitute natural gravel in a cement-stabilized base is an effective technique for high-quality and large-scale use. This study replaced natural gravel with iron tailings of 25%, 50%, 75%, and 100% to develop a cement-stabilized iron tailing base (IT-CSG). Additionally, the drying shrinkage, temperature shrinkage, fatigue properties, and unconfined compressive strength of IT-CSG were investigated. The results reveal that owing to the large porosity of iron tailings and adsorption of more water, the internal water content of the IT-CSG mixture increases with an increase in iron tailings content. Consequently, the cumulative water loss rate of IT-CSG increases, and the drying shrinkage strain increases. The average temperature shrinkage coefficient of IT-CSG gradually increases as the iron tailing content increases owing to the larger porosity and space for temperature shrinkage deformation in the IT-CSG. Therefore, the fatigue equation of IT-CSG is established, indicating that fatigue life decreases slightly with an increase in iron tailing content. Notably, the fatigue life of IT-CSG positively correlates with cement dosage. Furthermore, the unconfined compressive strength of IT-CSG gradually decreases as the iron tailing content increases.

• Record URL:
  • https://doi.org/10.1080/10298436.2022.2124251
• 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:
  • Ji, Xiaoping
  • Sun, Enyong
  • Sun, Yunlong
  • Zhang, Xueyuan
  • Wu, Tongda
• Publication Date: 2023

Language

• English

Media Info

• Media Type: Web
• Features: References;
• Pagination: 2124251
• 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: Cement; Compressive strength; Mechanical fatigue; Moisture content; Pavement base course; Shrinkage; Tailings
• Subject Areas: Highways; Materials; Pavements;

Filing Info

• Accession Number: 01912942
• Record Type: Publication
• Files: TRIS
• Created Date: Mar 23 2024 6:19PM