TBM 터널 세그먼트용 60 MPa급 강섬유보강콘크리트의 휨성능 평가 (Flexural performance evaluation of SFRC with design strength of 60 MPa)
| Author(s): |
Do-Young Moon
Soo-Ho Chang Gyu-Phil Lee Gyu-Jin Bae |
|---|---|
| Medium: | journal article |
| Language(s): | Korean |
| Published in: | Journal of Korean Tunnelling and Underground Space Association (한국터널지하공간학회 논문집), 2013, n. 3, v. 15 |
| Page(s): | 175-186 |
| DOI: | 10.9711/ktaj.2013.15.3.175 |
| Abstract: | Based on Model Code 2010, flexural and residual strength, flexural toughness of SFRC with design strength of 60 MPa are evaluated. For comparisons, SFRC with design strength 40 MPa was tested. Distribution of steel fibers in crack surface of specimens was evaluated by visual inspection. The used steel fibers were hooked fibers with aspect ratio of 64, 67 and 80. In all specimens, mix ratio of steel fibers was 0.5% Vol. In results, only SFRC with the highest aspect ratio satisfied requirements specified in Model Code 2010. The results demonstrated that the use of high aspect ratio will provide enough flexural toughness for high strength concrete. Also, it is found that low slump of high strength concrete can help to enhance isotropic fiber distribution. |
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10394755 - Published on:
04/01/2020 - Last updated on:
24/01/2020
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