A study on the flexural toughness evaluation method of steel fiber reinforced shotcrete

강섬유 보강 숏크리트의 휨인성 평가 방법 연구

  • 김재동 (강원대학교 지구시스템공학과) ;
  • 김덕영 (강원대학교 대학원)
  • Published : 2000.06.01


This study was aimed to verify the validity of the flexural toughness evaluation method of steel fiber reinforced shotcrete(SFRS) currently being adopted by Korea Highway Corporation(KHC). Total 33 beam specimens using six different kinds of steel fiber products were prepared at tunnel construction sites and flexural toughness tests were executed at laboratory. Equivalent flexural strengths and toughness quotients were evaluated from the tests following the KHC guide iud these were compared with the quality grades determined under the guides proposed by ASTM, ITA and EFNARC. To discard the disadvantage that the toughness quotient could be influenced by flexural strength when following the KHC guide, a modification substituting the designed flexural strength for the flexural strength in the toughness quotient calculation formula was proposed to rate the quality of SFRS more adequately.


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