Dynamic compressive and flexural behaviors of ultra-rapid-hardening mortar containing polyethylene fibers
- Title
- Dynamic compressive and flexural behaviors of ultra-rapid-hardening mortar containing polyethylene fibers
- Author
- 류두열
- Keywords
- Ultra-rapid-hardening mortar; Polyethylene fiber; Strain-hardening behavior; Impact resistance; Rate sensitivity
- Issue Date
- 2021-04
- Publisher
- SPRINGERNATURE
- Citation
- ARCHIVES OF CIVIL AND MECHANICAL ENGINEERING, v. 21, NO. 2, article no. 75
- Abstract
- In this study, the dynamic, compressive, and flexural behaviors of ultra-rapid-hardening mortar (URHM) containing 2% polyethylene fiber are investigated. The results confirm the robust strain-hardening behavior of URHM at an early age of 4 h. Its tensile strength, strain capacity, and g value at 4 h were found to be 7.3 MPa, 5.1%, and 297.5 kJ/m(3), respectively. The compressive and flexural strength and toughness of URHM increased with the strain rate. A higher loading rate led to a greater increase in the strength; the rate sensitivity was higher during flexure compared to that during compression. The highest dynamic increase factor (DIF) of the compressive strength was 1.75 up to a strain rate of 115/s; the highest DIF of the flexural strength was 3.34 up to a strain rate of 96/s. Its deflection-hardening behavior was converted to deflection-softening behavior under impact loads having a potential energy of 392 J or greater. Furthermore, the greater potential energy led to a lower energy dissipation rate, and more energy remained in the system. The rate sensitivity of the URHM under compression was similar to that of other fiber-reinforced concretes; however, its flexural strength was less sensitive to the strain rate than that of the others.
- URI
- https://link.springer.com/article/10.1007%2Fs43452-021-00233-3https://repository.hanyang.ac.kr/handle/20.500.11754/176936
- ISSN
- 1644-9665;2083-3318
- DOI
- 10.1007/s43452-021-00233-3
- Appears in Collections:
- COLLEGE OF ENGINEERING[S](공과대학) > ARCHITECTURAL ENGINEERING(건축공학부) > Articles
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