Research on Drying Shrinkage and Early-Age Crack Resistance of Aramid Fiber Reinforced Concrete

As the key properties of concrete, the drying shrinkage and crack resistance influence the durability and service life of concrete structures. The Aramid Fiber Reinforced Concrete (AFRC) has excellent properties and promising applications, such as in highway and airport pavements. However, the studies on the drying shrinkage and early-age crack resistance of AFRC have rarely been carried out. This paper focuses on these two critical properties through experimental research. Based on the analysis of mechanical behavior, the volume fraction of aramid fiber is selected as 0.8%, 1.0% and 1.2% in the drying shrinkage test. In the test of early-age crack resistance, the aramid fiber volume fraction is 0.2%, 0.4%, 0.6%, 0.8% and 1.0%. The experimental results and theoretical analysis manifest that the aramid fiber could enhance the early-age crack resistance of AFRC and reduce the drying shrinkage of AFRC. Additionally, empirical models are proposed to predict the drying shrinkage of AFRC.

• Supplemental Notes:
  • This paper was sponsored by TRB committee AFN40 Standing Committee on Concrete Materials and Placement Techniques.
• Authors:
  • Zhao, Yumin
  • Guo, Runhua
  • Zhou, Youjia
• Conference:
  • Transportation Research Board 97th Annual Meeting
  • Location: Washington DC, United States
  • Date: 2018-1-7 to 2018-1-11
• Date: 2018

Language

• English

Media Info

• Media Type: Digital/other
• Features: Figures; References; Tables;
• Pagination: 9p

Subject/Index Terms

• TRT Terms: Aramid fibers; Drying; Durability; Fiber reinforced concrete; Mechanics; Pavement cracking; Service life; Shrinkage
• Subject Areas: Highways; Materials; Pavements;

Filing Info

• Accession Number: 01661028
• Record Type: Publication
• Report/Paper Numbers: 18-01908
• Files: TRIS, TRB, ATRI
• Created Date: Feb 23 2018 4:28PM