Microstructure evolution and impact resistance of crumb rubber concrete after elevated temperatures

With the rapid development of the automobile industry, the disposal of scrap tires in an eco-friendly manner has become a global concern. Due to excellent toughness and durability performance of crumb rubber concrete (CRC), it is a promising approach for recycling massive scrap tires. In this study, the impact resistance of CRC after exposure to elevated temperatures (200 °C and 400 °C) was experimentally investigated using a split Hopkinson bar (SHPB). The pore structure, hydrates and morphology of CRC microstructure evolution after elevated temperatures were also studied using an ultra-depth of field test, TG-DSC, CT, and NMR. Results show that although rubber concrete is subjected to 200 °C high temperature, its strength and impact resistance do not decrease because rubber can release the capillary pressure caused by elevated temperature. However, a significant loss in the ultimate strength is observed at 400 °C. This is because when CRC with a rubber content of 100 kg/m3 is subjected to an elevated temperature of 400 °C, its void (pore size > 1 μm) ratio is 3.4 times higher than that of plain concrete. The addition of rubber particles improves the impact toughness of concrete even after the elevated temperature of 400 °C, and the ultimate compressive strength under dynamic load is linearly related to the porosity and logarithm of strain rate.

• Record URL:
  • https://doi.org/10.1016/j.conbuildmat.2023.131340
• Record URL:
  • http://www.sciencedirect.com/science/article/pii/S095006182301053X
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/09500618
• Supplemental Notes:
  • © 2023 Elsevier Ltd. All rights reserved. Abstract reprinted with permission of Elsevier.
• Authors:
  • Yu, Yong
  • Jin, Zuquan
  • 0000-0002-6564-1023
  • Shen, Dongxian
  • An, Junlin
  • Sun, Yuyan
  • Li, Ning
• Publication Date: 2023-6-27

Language

• English

Media Info

• Media Type: Web
• Features: References;
• Pagination: 131340
• Serial:
  • Construction and Building Materials
  • Volume: 384
  • Issue Number: 0
  • Publisher: Elsevier
  • ISSN: 0950-0618
  • Serial URL: http://www.sciencedirect.com/science/journal/09500618?sdc=1

Subject/Index Terms

• TRT Terms: Crumb rubber; High temperature; Microstructure; Porosity; Rubberized concrete; Shock resistance
• Subject Areas: Highways; Materials; Pavements;

Filing Info

• Accession Number: 01886373
• Record Type: Publication
• Files: TRIS
• Created Date: Jun 28 2023 4:29PM