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2024 Vol.14, Issue 2 Preview Page

Scientific Paper

Evaluation of Field Applicability of Synthetic Fiber-Reinforced Shotcrete through Fiber Output Amount Calculation

합성 섬유보강 숏크리트의 혼입량 산출을 통한 현장 적용성 평가

Kyung Suk Yoo1
,
JangTae Kim2
,
JaeSoon Choi3*
유 경석1
,
김 장태2
,
최 재순3*
1Associate Prof, Dept. of Civil & Architectural Eng. Univ. of Seokyeng
2CEO, World Engineering & Constructino Co., LTD.
3Professor, Dept. of Civil & Architectural Eng. Univ. of Seokyeng
1서경대학교 토목건축공학과 부교수(박사)
2(주)월드이앤씨 사장(박사)
3서경대학교 토목건축공학과, 교수(박사)
*Corresponding Author
31 December 2024. pp. 202-212
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Abstract

In previous studies, the quality characteristics of various synthetic fiber-reinforced shotcrete materials were evaluated to enhance their applicability in field conditions, and optimal fiber incorporation rates were calculated. This research advances these studies by evaluating the field applicability of PET fiber-reinforced shotcrete, determining design input amounts and incorporation rates, and analyzing constructability, cost-effectiveness, environmental impact, and safety. Adjustments were made considering the bond load and drawing stress of PET fibers compared to steel fibers, resulting in a correction factor of 11.7%. The final fiber dosage was set at 8 kg/m3 after considering particle number and rebound rate. The constructability assessment showed that PET fibers do not cause floating and have significantly less clumping, enabling uniform construction performance. Economic analysis revealed a cost reduction of 34.1% compared to steel fibers. CO2 emissions were reduced by 25.6% with PET fibers and 55.3% with recycled PET fibers compared to steel fibers. Additionally, the human safety and fire resistance performances were also found to be superior. Based on these results, PET fiber-reinforced shotcrete is expected to be highly applicable in various tunnel construction sites.

Keywords
Fiber-reinforced shotcrete
Synthetic Fiber-Reinforced Shotcrete
Polyethylene terephthalate fiber
Field applicability
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Information
  • Publisher :KOREAN ASPHALT INSTITUTE
  • Publisher(Ko) :한국아스팔트학회
  • Journal Title :Journal of the Korean Asphalt Institute
  • Journal Title(Ko) :한국아스팔트학회지
  • Volume : 14
  • No :2
  • Pages :202-212
  • Received Date : 2024-12-14
  • Revised Date : 2024-12-24
  • Accepted Date : 2024-12-31
  • DOI :https://doi.org/10.22702/jkai.2024.14.2.19
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