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Journal of the Korea Concrete Institute

J Korea Inst. Struct. Maint. Insp.
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  • Korea Citation Index (KCI)

  1. ์ •ํšŒ์›, ์„ธ๋ช…๋Œ€ํ•™๊ต ์™ธ๋ถ€์—ฐ๊ตฌ์› ๊ณตํ•™๋ฐ•์‚ฌ
  2. ์ •ํšŒ์›, ์„ธ๋ช…๋Œ€ํ•™๊ต ๊ฑด์„ค๊ณตํ•™๊ณผ ๋ฐ•์‚ฌ๊ณผ์ •
  3. ์ •ํšŒ์›, ์„ธ๋ช…๋Œ€ํ•™๊ต ๊ฑด์„ค๊ณตํ•™๊ณผ ์„์‚ฌ๊ณผ์ •
  4. ์ •ํšŒ์›, ์„ธ๋ช…๋Œ€ํ•™๊ต ํ† ๋ชฉ๊ณตํ•™๊ณผ ๊ต์ˆ˜



์น˜์œ ํŠน์„ฑ, ๋ณด์ˆ˜ ๋ชจ๋ฅดํƒ€๋ฅด, ์ž๊ธฐ์น˜์œ , ๊ณ ์ƒ์บก์Š, ๊ฒฐ์ •์„ฑ์žฅํ˜•
Healing Characteristics, Self-Healing, Solid Capsule, Crystal Growth Type

1. ์„œ ๋ก 

๊ตฌ์กฐ๋ฌผ์— ์žˆ์–ด์„œ ์ž๊ธฐ์น˜์œ  ๊ธฐ์ˆ (Self-Healing Technology)์€ ๊ท ์—ด์ด ๋ฐœ์ƒํ•  ๊ฒฝ์šฐ ๊ท ์—ด์„ ์Šค์Šค๋กœ ํƒ์ง€ํ•˜์—ฌ ๋Šฅ๋™์ ์œผ๋กœ ์น˜์œ ํ•˜๋Š” ๊ธฐ์ˆ ๋กœ์จ ์ตœ๊ทผ ๊ตญ๋‚ด์™ธ์ ์œผ๋กœ ์Šค๋งˆํŠธ ๊ฑด์„ค๊ธฐ์ˆ  ๋ถ„์•ผ ๋กœ ๋Œ€๋‘๋˜๊ณ  ์žˆ๋Š” ๊ธฐ์ˆ  ์ค‘ ํ•˜๋‚˜์ด๋‹ค. ์ž๊ธฐ์น˜์œ  ๊ธฐ์ˆ ์ด ๋ถ€์—ฌ๋œ ๊ตฌ์กฐ๋ฌผ์€ ๊ท ์—ด ๋ฐœ์ƒ ์ฆ‰์‹œ ๊ท ์—ด์น˜์œ ๊ฐ€ ์ง„ํ–‰๋˜๋ฉฐ, ๊ท ์—ด ๋ฐœ์ƒ ์ดˆ๊ธฐ์— ๊ท ์—ด closing ํšจ๊ณผ๋กœ ์ธํ•˜์—ฌ ๊ท ์—ด์˜ ์ง„์ „ ๋ฐ ํ™•์žฅ์„ ์ €๊ฐ ๋ฐ ๋ฐฉ์ง€ํ•  ์ˆ˜ ์žˆ์–ด ์ผ๋ฐ˜์ ์ธ ๊ตฌ์กฐ๋ฌผ์˜ ์œ ์ง€๋ณด์ˆ˜ ์‹œ๊ฐ„, ๋…ธ๋ ฅ ๋ฐ ๋น„์šฉ์„ ํฌ๊ฒŒ ์ ˆ๊ฐํ•  ์ˆ˜ ์žˆ๋Š” ๊ธฐ๋Œ€ํšจ๊ณผ๊ฐ€ ์žˆ๋‹ค. ํŠนํžˆ, ์ธ๋ ฅ์ด ์‰ฝ๊ฒŒ ์ ‘๊ทผํ•˜๊ธฐ ์–ด๋ ค์šด ๊ตฌ์กฐ๋ฌผ์˜ ๊ฒฝ์šฐ์—๋„ ํšจ๊ณผ์ ์œผ๋กœ ๋ณด์ˆ˜๋ฅผ ์ˆ˜ํ–‰ํ•  ์ˆ˜ ์žˆ๊ธฐ ๋•Œ๋ฌธ์—(Erik, 2013 ; An, 2014)(5,1), ๊ตฌ์กฐ๋ฌผ์˜ ๋ณด์ˆ˜ํšจ๊ณผ๋ฟ๋งŒ ์•„๋‹ˆ๋ผ ์ž‘์—…์ธ๋ ฅ์˜ ์•ˆ์ „์„ฑ๋„ ํ™•๋ณด๊ฐ€ ๊ฐ€๋Šฅํ•˜์—ฌ ์ข…ํ•ฉ์ ์ธ ๊ธฐ๋Œ€ํšจ๊ณผ๋Š” ๋”์šธ ํด ๊ฒƒ์œผ๋กœ ์˜ˆ์ƒ๋˜๊ณ  ์žˆ๋‹ค. ๊ตฌ์กฐ๋ฌผ์— ์ ์šฉ๊ฐ€๋Šฅํ•œ ์ž๊ธฐ์น˜์œ  ๊ธฐ์ˆ ์€ ๋งค์ปค๋‹ˆ์ฆ˜์— ๋”ฐ๋ผ ๋‹ค์–‘ํ•œ ๊ฐœ๋…์ด ์กด์žฌํ•˜๊ณ  ์žˆ์œผ๋ฉฐ(Oh, 2017)(10), ์ ์šฉ ํ™˜๊ฒฝ ๋ฐ ๊ตฌ์กฐ๋ฌผ์— ๋”ฐ๋ผ ์ ํ•ฉํ•œ ๊ธฐ์ˆ ์„ ์‚ฌํšŒํ™˜๊ฒฝ์  ์ธก๋ฉด๊ณผ ๊ฒฝ์ œ์„ฑ ์ธก๋ฉด์„ ๊ณ ๋ คํ•˜์—ฌ ์ ์šฉํ•  ์ˆ˜ ์žˆ๋‹ค.

๋ณธ ์—ฐ๊ตฌ์—์„œ๋Š” ๊ตฌ์กฐ๋ฌผ์— ์ ์šฉ ๊ฐ€๋Šฅํ•œ ๋‹ค์–‘ํ•œ ์ž๊ธฐ์น˜์œ  ๊ธฐ์ˆ  ์ค‘ ์ž๊ธฐ์น˜์œ  ์†Œ์žฌ๋ฅผ ์บก์Šํ™”ํ•˜์—ฌ ์‚ฌ์šฉํ•˜๋Š” ๊ธฐ์ˆ ์„ ๋Œ€์ƒ์œผ๋กœ ๋ฐฐํ•ฉ์— ์ง์ ‘ ํ˜ผํ•ฉ๊ฐ€๋Šฅํ•œ ์ž๊ธฐ์น˜์œ  ์บก์Š์„ ์ œ์กฐํ•˜๊ณ ์ž ํ•˜์˜€๋‹ค. ์บก์Š์„ ํ™œ์šฉํ•œ ์ž๊ธฐ์น˜์œ  ๊ธฐ์ˆ ์€ ์ง์ ‘์ ์ธ ์ž๊ธฐ์น˜์œ  ์†Œ์žฌ๋ฅผ ๋‹ค๋Ÿ‰ ํฌํ•จํ•  ์ˆ˜ ์žˆ๊ธฐ ๋•Œ๋ฌธ์—(Tatyana, 2012 ; M. Hunger, 2009)(6,9) ์†์ƒ๋ถ€์œ„ ์ฆ‰, ๊ท ์—ด์ด ๋ฐœ์ƒํ•œ ๋ถ€์œ„์—๋งŒ ํŒŒ๊ดด๋˜์–ด ์„ ํƒ์ ์œผ๋กœ ๋ฐ˜์‘์‹œํ‚ฌ ์ˆ˜ ์žˆ๋‹ค๋Š” ์žฅ์ ์ด ์žˆ์–ด ํŒŒ๊ดด๋˜์ง€ ์•Š์€ ์บก์Š์€ ์ง€์†์ ์œผ๋กœ ์ž๊ธฐ์น˜์œ  ์†Œ์žฌ์˜ ์„ฑ๋Šฅ์ด ์œ ํšจํ•˜๋‹ค. ์บก์Š์„ ํ™œ์šฉํ•œ ์ž๊ธฐ์น˜์œ  ๊ธฐ์ˆ ์˜ ๋™ํ–ฅ์„ ์‚ดํŽด๋ณด๋ฉด ์ž๊ธฐ์น˜์œ  ์†Œ์žฌ๋ฅผ ๋งˆ์ดํฌ๋กœ ์‚ฌ์ด์ฆˆ๋กœ ์บก์Šํ™”ํ•˜์—ฌ ์ ์šฉํ•œ ๋ฐ” ์žˆ๋‹ค. (Shazim, 2014 ; Kim, 2003)(13). ๊ทธ๋Ÿฌ๋‚˜ ์ž๊ธฐ์น˜์œ  ์†Œ์žฌ๋ฅผ ๋ฐ˜์‘์‹œํ‚ค๊ธฐ ์œ„ํ•ด์„œ๋Š” ๋ฐ˜์‘ ์ด‰๋งค์ œ(Trigger)๊ฐ€ ๋ณ„๋„๋กœ ์š”๊ตฌ๋˜๊ธฐ ๋•Œ๋ฌธ์— ๋ฐ˜์‘ ์ด‰๋งค์ œ๋„ ๋ณ„๋„๋กœ ๋งˆ์ดํฌ๋กœ ์บก์Šํ™”ํ•˜์—ฌ ํ•จ๊ป˜ ์‚ฌ์šฉํ•ด์•ผ ๋œ๋‹ค๋Š” ๋ฌธ์ œ์ ์ด ์žˆ์œผ๋ฉฐ, ์บก์Š์ด ํŒŒ๊ดด๋˜์–ด ์ž๊ธฐ์น˜์œ  ์†Œ์žฌ๊ฐ€ ๊ท ์—ด๋ฉด์œผ๋กœ ์œ ์ถœ๋˜๋”๋ผ๋„ ๋ฐ˜์‘ ์ด‰๋งค์ œ๋ฅผ ๋งŒ๋‚˜์ง€ ๋ชปํ•˜๋ฉด ๋ฐ˜์‘์‹œํ‚ฌ ์ˆ˜ ์—†๋‹ค๋Š” ๋ฌธ์ œ์ ์ด ์žˆ๋‹ค. ๊ตญ๋‚ด์˜ ๊ฒฝ์šฐ ์ด๋Ÿฌํ•œ ๋ฌธ์ œ์ ์ด ๋ณด์™„๋˜์–ด ๋ณ„๋„์˜ ์ด‰๋งค์ œ ์—†์ด ํƒœ์–‘๊ด‘ ๋˜๋Š” ์ˆ˜๋ถ„์œผ๋กœ ๋ฐ˜์‘ํ•  ์ˆ˜ ์žˆ๋Š” ์ž๊ธฐ์น˜์œ  ๋งˆ์ดํฌ๋กœ ์บก์Š์„ ์ œ์กฐํ•˜์—ฌ ๊ฑด์„ค ๋ถ„์•ผ ๊ธฐ์ˆ ์— ์ ์šฉํ•œ ์‚ฌ๋ก€๊ฐ€ ์žˆ๋‹ค(Song, 2013)(14). ๊ทธ๋Ÿฌ๋‚˜ ๊ณตํ†ต์ ์œผ๋กœ ์ž๊ธฐ์น˜์œ  ์บก์Š์˜ ์ ์šฉ๋Œ€์ƒ์ด ๊ตฌ์กฐ๋ฌผ ๋ชจ์ฒด๊ฐ€ ์•„๋‹ˆ๋ผ ๋ชจ์ฒด ํ‘œ๋ฉด์„ ๋Œ€์ƒ์œผ๋กœ ํ•˜๊ณ  ์žˆ์œผ๋ฉฐ, ์ž๊ธฐ์น˜์œ  ์†Œ์žฌ๋ฅผ ์œ ๊ธฐ๊ณ„ ๊ธฐ๋ฐ˜์˜ ์•ก์ƒํ˜• ํ™”ํ•™ ์•ฝํ’ˆ์„ ์ ์šฉํ•˜๊ณ  ์žˆ๋‹ค(Wang, 2003 ; Blaiszika, 2007)(15,2). ์ด๋Ÿฌํ•œ ๊ฒฝ์šฐ ๋ชจ์ฒด ํ‘œ๋ฉด์„ ๋Œ€์ƒ์œผ๋กœ ํ•˜๊ณ  ์žˆ๊ธฐ ๋•Œ๋ฌธ์— ๋ฐ•๋ง‰ ํ˜•ํƒœ์˜ ์ฝ”ํŒ…์žฌ์— ํฌํ•จ๋˜๋Š” ์ž๊ธฐ์น˜์œ  ์บก์Š๋Ÿ‰์ด ๋งค์šฐ ์ œํ•œ์ ์ด๋ฉฐ, ๊ท ์—ด ํญ ๋˜๋Š” ๊ท ์—ด ๊นŠ์ด์— ๋Œ€ํ•˜์—ฌ ๋Œ€์‘ํ•˜๊ธฐ์— ์–ด๋ ต๋‹ค๋Š” ๋‹จ์ ์ด ์žˆ๋‹ค. ๋˜ํ•œ, ๊ตฌ์กฐ๋ฌผ ๋ชจ์ฒด๋Š” ๋Œ€๋ถ€๋ถ„ ๋ฌด๊ธฐ๊ณ„ ๊ธฐ๋ฐ˜ ์žฌ๋ฃŒ๋กœ ๊ตฌ์„ฑ๋˜์–ด ์žˆ๊ธฐ ๋•Œ๋ฌธ์— ์œ ๊ธฐ๊ณ„ ๊ธฐ๋ฐ˜ ์ž๊ธฐ์น˜์œ  ์†Œ์žฌ๋Š” ์—ด์  ํŠน์„ฑ์ด ๋‹ฌ๋ผ ์žฅ๊ธฐ์ ์ธ ์ธก๋ฉด์—์„œ ๋‚ด๊ตฌ์„ฑ์ด ๋–จ์–ด์งˆ ์šฐ๋ ค๊ฐ€ ์žˆ๋‹ค(Oh, 2017)(10). ์ด๋Ÿฌํ•œ ๋ฌธ์ œ๋ฅผ ํ•ด๊ฒฐํ•˜๊ธฐ ์œ„ํ•œ ๋ฐฉ์•ˆ์œผ๋กœ ์ž๊ธฐ์น˜์œ  ์บก์Š์„ ๋ฐฐํ•ฉ์— ์ง์ ‘ ํ˜ผํ•ฉํ•˜์—ฌ ์ ์šฉํ•  ๊ฒฝ์šฐ์—๋Š” ๋ชจ์ฒด์˜ ๋‘๊ป˜๋ฅผ ์ ์šฉํ•  ๋Œ€์ƒ์— ๋Œ€์‘ํ•˜์—ฌ ์ž์œ ๋กญ๊ฒŒ ์กฐ์ ˆ์ด ๊ฐ€๋Šฅํ•˜๊ธฐ ๋•Œ๋ฌธ์— ์ƒ๋Œ€์ ์œผ๋กœ ๋งŽ์€ ์ž๊ธฐ์น˜์œ  ์บก์Š์„ ๊ท ์—ด๋ฉด์— ํ™•๋ณดํ•  ์ˆ˜ ์žˆ์œผ๋ฉฐ, ํ‘œ๋ฉด์— ์ ์šฉํ•œ ๊ฒฝ์šฐ์™€ ๋น„๊ตํ•˜์—ฌ ๊ท ์—ดํญ ๋ฐ ๊นŠ์ด์— ๋Œ€์‘ํ•˜์—ฌ ์ž๊ธฐ์น˜์œ  ํšจ๊ณผ๋ฅผ ํ™•์žฅ์‹œํ‚ฌ ์ˆ˜ ์žˆ๋‹ค(Oh, 2019)(11). ๋˜ํ•œ ์ž๊ธฐ์น˜์œ  ์†Œ์žฌ์— ๋Œ€ํ•˜์—ฌ ์œ ๊ธฐ๊ณ„ ๊ธฐ๋ฐ˜ ์น˜์œ  ์†Œ์žฌ ๋Œ€์‹ ์— ๋ฌด๊ธฐ๊ณ„ ๊ธฐ๋ฐ˜ ์น˜์œ  ์†Œ์žฌ๋ฅผ ํ™œ์šฉํ•  ๊ฒฝ์šฐ ์ž๊ธฐ์น˜์œ ๋œ ๊ท ์—ด๋ฉด์˜ ๋‚ด๊ตฌ์„ฑ์„ ์ฆ๋Œ€์‹œํ‚ฌ ์ˆ˜ ์žˆ๋‹ค.

๋”ฐ๋ผ์„œ ๋ณธ ์—ฐ๊ตฌ์—์„œ๋Š” ์ž๊ธฐ์น˜์œ  ์†Œ์žฌ๋กœ์จ ๊ฒฐ์ •์„ฑ์žฅํ˜• ๋ฌด๊ธฐ๊ณ„ ๋ถ„์ฒด๋ฅผ ํ™œ์šฉํ•œ ์ž๊ธฐ์น˜์œ  ๊ณ ์ƒ์บก์Š(Self-Healing Solid Capsules)์„ ์ œ์กฐํ•˜์˜€๋‹ค. ๊ฒฐ์ •์„ฑ์žฅํ˜• ์ž๊ธฐ์น˜์œ  ๊ณ ์ƒ์บก์Š์„ ํ˜ผํ•ฉํ•˜๊ธฐ ์œ„ํ•œ ํ‘œ์ค€๋ฐฐํ•ฉ์€ ๊ตฌ์กฐ๋ฌผ ๋ณด์ˆ˜์‹œ ์‹ค์ œ ํ™œ์šฉ๋˜๋Š” ๋ณด์ˆ˜ ๋ชจ๋ฅดํƒ€๋ฅด ๊ธฐ์ค€์œผ๋กœ ์ž๊ธฐ์น˜์œ  ๊ณ ์ƒ์บก์Š ํ˜ผํ•ฉ์— ๋”ฐ๋ฅธ ๋ณด์ˆ˜ ๋ชจ๋ฅดํƒ€๋ฅด์˜ ํ’ˆ์งˆ์„ ํ‰๊ฐ€ํ•˜์˜€์œผ๋ฉฐ, ๊ท ์—ด ์ž๊ธฐ์น˜์œ  ํŠน์„ฑ์„ ํ‰๊ฐ€ํ•˜์˜€๋‹ค. ์ž๊ธฐ์น˜์œ  ๊ณ ์ƒ์บก์Š์€ ๋ ˆ๋ฏธ์ฝ˜, ํ”„๋ฆฌ์บ์ŠคํŠธ ๋ถ€์žฌ์˜ ๋ฐฐํ•ฉ์—๋„ ์ ์šฉ ๊ฐ€๋Šฅ ํ•˜์ง€๋งŒ ๋ณธ ์—ฐ๊ตฌ์—์„œ๋Š” ๋ณด์ˆ˜ ๋ชจ๋ฅดํƒ€๋ฅด์— ์ ์šฉํ•˜์—ฌ ๋Œ€๋‹จ๋ฉด ๋ณด์ˆ˜ ์ดํ›„์— ๋˜๋‹ค์‹œ 2์ฐจ ๊ท ์—ด์ด ๋ฐœ์ƒํ•  ๊ฒฝ์šฐ ์ž๊ธฐ์น˜์œ ๊ฐ€ ๊ฐ€๋Šฅํ•˜๋„๋ก ์ž๊ธฐ์น˜์œ  ๋ณด์ˆ˜ ๋ชจ๋ฅดํƒ€๋ฅด์— ์ ์šฉ์„ ์‹ค์‹œํ•˜์˜€๋‹ค. ๋ณธ ์—ฐ๊ตฌ๊ฒฐ๊ณผ๋ฅผ ํ†ตํ•˜์—ฌ ์ž๊ธฐ์น˜์œ  ์„ฑ๋Šฅ์„ ๊ฐ€์ง€๋Š” ๋ณด์ˆ˜ ๋ชจ๋ฅดํƒ€๋ฅด์˜ ์ œ์กฐ๊ธฐ์ˆ  ํ™•๋ณด๋ฅผ ์œ„ํ•œ ๊ธฐ๋ฐ˜์ž๋ฃŒ๋กœ์จ ํ™œ์šฉํ•˜๊ณ ์ž ํ•œ๋‹ค.

2. ์‹คํ—˜๊ฐœ์š”

2.1 ๊ฒฐ์ •์„ฑ์žฅํ˜• ์ž๊ธฐ์น˜์œ  ๊ณ ์ƒ์บก์Š์˜ ์ œ์กฐ

2.1.1 ๊ฒฐ์ •์„ฑ์žฅํ˜• ์ž๊ธฐ์น˜์œ  ์†Œ์žฌ

๊ฒฐ์ •์„ฑ์žฅํ˜• ์ž๊ธฐ์น˜์œ  ๊ณ ์ƒ์บก์Š(Self-Healing Solid Capsules, ์ดํ•˜ SHSC๋กœ ์•ฝํ•จ)์€ ์ˆ˜ํ™”๋ฐ˜์‘์„ ํ•˜๋Š” ๋ฌด๊ธฐ๊ณ„ ๊ธฐ๋ฐ˜ ๋ถ„์ฒด๋ฅผ ์‚ฌ์šฉํ•˜์˜€๋‹ค. ์‚ฌ์šฉ๋œ ๋ถ„์ฒด๋Š” ์นจ์ƒํ˜• ๊ฒฐ์ •์ด ๋ฐœ์ƒ๋˜๋Š” ์•„์œˆ๊ณ„ ํŒฝ์ฐฝ์ œ(Calcium Sulfoaluminate, ์ดํ•˜ CSA๋กœ ์•ฝํ•จ)์™€ ์œก๊ฐํŒ์ƒ์˜ ๊ฒฐ์ •์ด ๋ฐœ์ƒ๋˜๋Š” ๋ฌด์ˆ˜์„๊ณ (Anhydrous Gypsum(CaSO4), ์ดํ•˜ AG๋กœ ์•ฝํ•จ)๋ฅผ ์ ์ ˆํ•˜๊ฒŒ ํ˜ผํ•ฉํ•˜์—ฌ ์‚ฌ์šฉํ•˜์˜€๋‹ค. ์ด๋“ค์˜ ๋ฐ˜์‘ ๋งค์ปค๋‹ˆ์ฆ˜์€ AG์˜ ๊ฒฐ์ •์„ ํ†ตํ•˜์—ฌ ๊ท ์—ด ์˜์—ญ์˜ ๊ณต๊ฐ„์ถฉ์ „ ํšจ๊ณผ๊ฐ€ ์žˆ์œผ๋ฉฐ, CSA์˜ ๊ฒฐ์ •์„ ํ†ตํ•˜์—ฌ ์๊ธฐํšจ๊ณผ์— ๋”ฐ๋ฅธ ๊ฒฐ์ •๋ฌผ๊ณผ ๋ฐ˜์‘ ์ƒ์„ฑ๋ฌผ์˜ ์•ˆ์ •ํ™” ํšจ๊ณผ์ด๋‹ค. CSA ๋ฐ AG์˜ ํ˜ผํ•ฉ๋น„๋Š” ์˜ˆ๋น„์‹คํ—˜์„ ํ†ตํ•˜์—ฌ ํ‘œ์ค€ ํ˜ผํ•ฉ๋น„๋ฅผ 7:3์œผ๋กœ ํ˜ผํ•ฉํ•˜์—ฌ ์‚ฌ์šฉํ•˜์˜€๋‹ค. Fig. 1์€ ์ž๊ธฐ์น˜์œ  ์†Œ์žฌ์˜ ๋ฐ˜์‘ ๋งค์ปค๋‹ˆ์ฆ˜์„ ๋‚˜ํƒ€๋‚ธ ๊ฒƒ์ด๋ฉฐ, Fig. 2๋Š” SHSC์˜ ์ œ์กฐ ์žฅ๋น„๋ฅผ ๋‚˜ํƒ€๋‚ธ ๊ฒƒ์ด๋‹ค.

Fig. 1. Self-healing reaction mechanism of SHSC

../../Resources/ksm/jksmi.2020.24.1.59/fig1.png

Fig. 2. Manufacturing device of SHSC

../../Resources/ksm/jksmi.2020.24.1.59/fig2.png

2.1.2 ๊ณ ์ƒ์บก์Š์˜ ์ œ์กฐ

๊ณ ์ƒ์บก์Š์˜ ์ œ์กฐ๋ฅผ ์œ„ํ•ด์„œ๋Š” ๊ฒฐ์ •์„ฑ์žฅํ˜• ์ž๊ธฐ์น˜์œ  ์†Œ์žฌ(์ดํ•˜ Core ๋กœ ์•ฝํ•จ)๋ฅผ ๋ถ„์ฒด์ƒ์—์„œ ์ผ์ • ํฌ๊ธฐ๋กœ ์ž…์žํ™”(์กฐ๋ฆฝํ™”)ํ•˜๊ธฐ ์œ„ํ•˜์—ฌ ์‘์ง‘์ œ๊ฐ€ ํ•„์š”ํ•˜๋‹ค. ์‘์ง‘์ œ๋Š” Core๊ฐ€ ์ž…์žํ™” ๊ณผ์ • ์ค‘ ๋ฐ˜์‘์„ ๋ฐฉ์ง€ํ•˜๊ธฐ ์œ„ํ•˜์—ฌ ์ˆ˜๋ถ„ํ•จ๋Ÿ‰์ด ์ตœ์†Œํ™”๋œ ์‘์ง‘์ œ๋ฅผ ์ ์šฉํ•˜์—ฌ์•ผ ํ•˜๋ฉฐ(Oh, 2017)(10), ๋˜ํ•œ ์ž…์žํ™”ํ•˜๊ธฐ ์œ„ํ•˜์—ฌ ์ผ์ •ํ•œ ์ ์„ฑ์„ ๊ฐ€์ ธ์•ผ ํ•˜๊ธฐ ๋•Œ๋ฌธ์— ์šฐ๋ ˆํƒ„๊ณ„ ์‘์ง‘์ œ๋ฅผ ์ ์šฉํ•˜์˜€๋‹ค. ์‘์ง‘์ œ๋ฅผ ํ†ตํ•˜์—ฌ ์ž…์žํ™”๋œ Core๋Š” ๋ฐฐํ•ฉ์— ํ˜ผํ•ฉ์‹œ ๋ฐฐํ•ฉ์ˆ˜์™€์˜ ๋ฐ˜์‘์„ ๋ฐฉ์ง€ํ•˜๊ธฐ ์œ„ํ•˜์—ฌ ๋ง‰์žฌ๋ฃŒ(์ดํ•˜ wall ๋กœ ์•ฝํ•จ)๋กœ์จ ์•ก์ƒ๊ณ ๋ฌด(Liquid type Rubber, ์ดํ•˜ LR๋กœ ์•ฝํ•จ)๋ฅผ ์ด์šฉํ•˜์—ฌ Core ํ‘œ๋ฉด์„ ์ฝ”ํŒ…ํ•˜์˜€๋‹ค. SHSC์˜ ์ œ์กฐ๋Š” Fig. 2์˜ ์ œ์กฐ์žฅ๋น„๋ฅผ ํ†ตํ•˜์—ฌ ๋ฌผ๋ฆฌ์ ์ธ ์ œ๋ฒ•์— ์˜ํ•˜์—ฌ ์ œ์กฐ๋œ๋‹ค(Oh, 2017 ; Oh, 2019 ; Choi, 2017)(10,11,16). ๊ฒฐ์ •์„ฑ์žฅํ˜• ์ž๊ธฐ์น˜์œ  ์†Œ์žฌ๋Š” ์‘์ง‘์ œ์™€ ํ˜ผํ•ฉํ•˜์—ฌ ์ ๋‹นํ•œ ์งˆ๊ธฐ๋ฅผ ๊ฐ€์ง€๋Š” ์ƒํƒœ๋กœ ๋งŒ๋“  ๋‹ค์Œ Fig. 2 (a)์˜ ์žฅ๋น„๋ฅผ ํ†ตํ•˜์—ฌ ์ฝ”์–ด์žฌ๋ฃŒ๋ฅผ ์ƒ์‚ฐํ•œ๋‹ค. ์ƒ์‚ฐ๋œ ์ฝ”์–ด๋Š” (b)์˜ ์žฅ๋น„๋ฅผ ํ†ตํ•˜์—ฌ ํฌ๊ธฐ๋ฅผ ๋ถ„๋ฅ˜ํ•˜๋ฉฐ, (c)์˜ ์žฅ๋น„๋ฅผ ํ†ตํ•˜์—ฌ wall ์ฝ”ํŒ…์„ ์‹ค์‹œํ•œ๋‹ค. ์ตœ์ข…์ ์œผ๋กœ (d)์˜ ์žฅ๋น„๋ฅผ ํ†ตํ•˜์—ฌ ๊ฑด์กฐํ•˜์—ฌ ์ œ์กฐ๋œ๋‹ค. Fig. 3์€ SHSC์˜ ํ˜•ํƒœ๋ฅผ ๋‚˜ํƒ€๋‚ธ ๊ฒƒ์œผ๋กœ SHSC์˜ ํฌ๊ธฐ๋Š” 850โˆผ1,000ฮผm ๋‚ด์˜ ํฌ๊ธฐ๋กœ ์ œ์กฐํ•˜์˜€๋‹ค. SHSC์˜ ์ ์ •ํฌ๊ธฐ๋Š” ์น˜์œ ํšจ๊ณผ๋ฅผ ๊ณ ๋ คํ•˜์—ฌ ๊ฒฐ์ •ํ•˜์˜€๋‹ค(Oh, 2017 ; Oh, 2019)(10,11).

Table 1. Mixing ratio of main materials of repair mortar

Type

W

B

S

Fiber

40 MPa

0.4

1

1.5

0.1

Table 2. Experimental variables and mix no.

Mixing ratio of SHSC

0 %

5 %

10 %

Mix No.

HRM-P

HRM-5

HRM-10

Fig. 3. Size of SHSC

../../Resources/ksm/jksmi.2020.24.1.59/fig3.png

2.2 ๋ณด์ˆ˜ ๋ชจ๋ฅดํƒ€๋ฅด์˜ ์ œ์กฐ

์‹คํ—˜์— ์‚ฌ์šฉ๋œ ๋ณด์ˆ˜ ๋ชจ๋ฅดํƒ€๋ฅด(์ดํ•˜ HRM์œผ๋กœ ์•ฝํ•จ)๋Š” ๊ตญ๋‚ด H์‚ฌ์˜ ์„ค๊ณ„๊ฐ•๋„ 40 MPa ์ˆ˜์ค€์˜ ๋ฐฐํ•ฉ์„ ๋Œ€์ƒ์œผ๋กœ ํ•˜์—ฌ SHSC ํ˜ผํ•ฉ์— ๋”ฐ๋ฅธ ํ’ˆ์งˆ ๋ฐ ๊ท ์—ด ์ž๊ธฐ์น˜์œ  ํŠน์„ฑ์„ ํ‰๊ฐ€ํ•˜๊ณ ์ž ํ•˜์˜€๋‹ค. Table. 1์€ ๋ณด์ˆ˜ ๋ชจ๋ฅดํƒ€๋ฅด์˜ ์ฃผ์š” ์žฌ๋ฃŒ ํ˜ผํ•ฉ๋น„๋ฅผ ๋‚˜ํƒ€๋‚ธ ๊ฒƒ์ด๋‹ค. W/B๋Š” 40%์ด๋ฉฐ, ๊ฒฐํ•ฉ์žฌ(B)๋Š” ์‹œ๋ฉ˜ํŠธ์™€ ๊ธฐ๋Šฅ์„ฑ ๋ถ„์ฒด๊ฐ€ ์ผ์ •๋น„์œจ๋กœ ํ˜ผํ•ฉ๋˜์–ด ์žˆ์œผ๋ฉฐ, ์ž”๊ณจ์žฌ๋Š” ๊ทœ์‚ฌ๋ฅผ ์‚ฌ์šฉํ•˜์˜€๋‹ค. ์„ฌ์œ ๋Š” ํด๋ฆฌ๋จธ ๋‹จ์„ฌ์œ ๊ฐ€ ์‚ฌ์šฉ๋˜์—ˆ๋‹ค. ๋ณธ ์—ฐ๊ตฌ์—์„œ๋Š” ๊ธฐ์ค€ ๋ฐฐํ•ฉ์œผ๋กœ HRM์„ ๋Œ€์ƒ์œผ๋กœ SHSC ํ˜ผํ•ฉ์— ๋”ฐ๋ฅธ ํ’ˆ์งˆ์˜ ์˜ํ–ฅ ๋ฐ ์ž๊ธฐ์น˜์œ  ์„ฑ๋Šฅ ํšจ๊ณผ๋ฅผ ํ‰๊ฐ€ํ•˜๊ณ ์ž ํ•˜์˜€๋‹ค. SHSC์˜ ํ˜ผํ•ฉ๋Ÿ‰์€ B์˜ ์งˆ๋Ÿ‰์— ๋Œ€ํ•˜์—ฌ 5% ๋ฐ 10% ํ˜ผํ•ฉํ•˜์˜€๋‹ค. Table 2๋Š” ์‹คํ—˜๋ณ€์ˆ˜ ๋ฐ ๋ฐฐํ•ฉ์„ ๋‚˜ํƒ€๋‚ธ ๊ฒƒ์ด๋‹ค.

2.3 ํ‰๊ฐ€๋ฐฉ๋ฒ•

2.3.1 ํ…Œ์ด๋ธ” ํ”Œ๋กœ์šฐ

ํ…Œ์ด๋ธ” ํ”Œ๋กœ์šฐ๋Š” โ€œKS L 5111 ์‹œ๋ฉ˜ํŠธ ์‹œํ—˜์šฉ ํ”Œ๋กœ์šฐ ํ…Œ์ด๋ธ”โ€์— ๊ทœ์ •๋œ ํ”Œ๋กœ ํ…Œ์ด๋ธ” ๋ฐ ํ”Œ๋กœ์šฐ์ฝ˜์„ ์ด์šฉํ•˜์—ฌ โ€œKS L 5105 ํ”Œ๋กœ์˜ ๊ฒฐ์ • ๋ฐฉ๋ฒ•โ€์— ์ค€ํ•˜์—ฌ 15์ดˆ ๋™์•ˆ 25ํšŒ, 12.7 mm์˜ ๋†’์ด๋กœ ๋‚™ํ•˜์‹œํ‚ค๋Š” ๋ฐฉ๋ฒ•์œผ๋กœ ํ…Œ์ด๋ธ” ํ”Œ๋กœ๋ฅผ ์ธก์ •ํ•˜์˜€์œผ๋ฉฐ, ๋‚™ํ•˜ ํ›„ ํผ์ง์ด ๋ฉˆ์ถ”์—ˆ์„ ๋•Œ ์ค‘์‹ฌ์„ ์ง€๋‚˜๋Š” ๋Œ€๊ฐ์„  3๋ฐฉํ–ฅ์˜ ์ง€๋ฆ„์„ ์ธก์ •ํ•˜์—ฌ ๊ทธ ํ‰๊ท ๊ฐ’์„ ํ…Œ์ด๋ธ” ํ”Œ๋กœ์šฐ๋กœ ํ•˜์˜€๋‹ค.

2.3.2 ๊ณต๊ธฐ๋Ÿ‰

๊ณต๊ธฐ๋Ÿ‰์€ โ€œKS L 3136 ์ˆ˜๊ฒฝ์„ฑ ์‹œ๋ฉ˜ํŠธ ๋ชจ๋ฅดํƒ€๋ฅด์˜ ๊ณต๊ธฐ๋Ÿ‰ ์ธก์ • ๋ฐฉ๋ฒ•โ€์— ์ค€ํ•˜์—ฌ ์•ˆ์ง€๋ฆ„ 76ยฑ1.5 mm, ๊นŠ์ด 88 mm์˜ ์›ํ†ตํ˜•์œผ๋กœ 23โ„ƒ์—์„œ 400ยฑ1 mL์˜ ๋ฌผ์„ ๋‹ด์„ ์ˆ˜ ์žˆ๋Š” ์šฉ๊ธฐ๋ฅผ ์‚ฌ์šฉํ•˜์—ฌ ๊ณต๊ธฐ๋Ÿ‰์„ ์ธก์ •ํ•˜์˜€๋‹ค.

(1)
๊ณต๊ธฐ๋Ÿ‰ (%) = $100-w\left(\dfrac{182.7+P}{2000+4P}\right)$

์—ฌ๊ธฐ์„œ,

$w$ : ๋ชจ๋ฅดํƒ€๋ฅด 400 mL์˜ ์งˆ๋Ÿ‰(g)

$P$ : ์‹œ๋ฉ˜ํŠธ ๊ธฐ์ค€ ํ˜ผํ•ฉ์ˆ˜์˜ %

2.3.3 ์••์ถ•๊ฐ•๋„

์••์ถ•๊ฐ•๋„๋Š” โ€œKS L 5105 ์ฝ˜ํฌ๋ฆฌํŠธ์˜ ๊ฐ•๋„ ์‹œํ—˜์šฉ ๊ณต์‹œ์ฒด ์ œ์ž‘ ๋ฐฉ๋ฒ•โ€์— ์ค€ํ•˜์—ฌ 50$\times$50$\times$50 mm์˜ ํ๋ธŒํ˜• ์‹œํ—˜ํŽธ์„ ์„ฑํ˜•ํ•˜์—ฌ ๊ธฐ๊ฑด ์–‘์ƒ์„ ์‹ค์‹œํ•˜์˜€๋‹ค. ์ดํ›„ ์žฌ๋ น์— ๋”ฐ๋ผ ๋งŒ๋Šฅ์‹œํ—˜๊ธฐ (Universal Testing Machine, UTM)๋ฅผ ์‚ฌ์šฉํ•˜์—ฌ ์••์ถ•๊ฐ•๋„๋ฅผ ์ธก์ •ํ•˜์˜€๋‹ค.

2.3.4 ๊ธธ์ด๋ณ€ํ™”

๊ธธ์ด๋ณ€ํ™”๋Š” 40ร—40ร—160 mm ๊ฐ์ฃผํ˜• ๋ชฐ๋“œ ๋‚ด๋ถ€์— ์ „๊ธฐ์‹ ๋งค๋ฆฝํ˜• ์ŠคํŠธ๋ ˆ์ธ ๊ฒŒ์ด์ง€๋ฅผ ์„ค์น˜ํ•˜์—ฌ ์‹œํ—˜ํŽธ์„ ์ œ์ž‘ํ•œ ๋‹ค์Œ ํƒ€์„ค ํ›„ 24์‹œ๊ฐ„์— ํƒˆํ˜•ํ•˜์—ฌ ์ •์น˜ํ•˜๋ฉด์„œ Data logger๋ฅผ ์ด์šฉํ•˜์—ฌ ๊ธธ์ด๋ณ€ํ™”๋Ÿ‰์„ ์ธก์ •ํ•˜์˜€๋‹ค.

2.3.5 ์ •์ˆ˜์œ„ ํˆฌ์ˆ˜์‹œํ—˜

SHSC์˜ ์ž๊ธฐ์น˜์œ  ์„ฑ๋Šฅ์€ ์ •์ˆ˜์œ„ ํˆฌ์ˆ˜์‹œํ—˜(h=300 mm)์„ ํ†ตํ•˜์—ฌ ๊ท ์—ด์ด ์œ ๋„๋œ ์‹œํ—˜ํŽธ์˜ ์ดˆ๊ธฐ ํˆฌ์ˆ˜๋Ÿ‰(Water Flow)์„ ์ธก์ •ํ•˜์˜€์œผ๋ฉฐ, ์น˜์œ ์žฌ๋ น ์ดํ›„์˜ ํˆฌ์ˆ˜๋Ÿ‰ ๊ฐ์†Œ์ˆ˜์ค€์„ ํ†ตํ•˜์—ฌ ์ž๊ธฐ์น˜์œ  ์ˆ˜์ค€์„ ํ‰๊ฐ€ํ•˜์˜€๋‹ค. ํˆฌ์ˆ˜์‹œ์šฉ ์‹œํ—˜ํŽธ์€ $\phi$ 100ร—50 mm ํฌ๊ธฐ์˜ ์‹œํ—˜ํŽธ์„ ์ œ์ž‘ํ•˜์—ฌ ์˜จ๋„(20ยฑ3)โ„ƒ ๋ฐ ์Šต๋„(50ยฑ 10)% ์กฐ๊ฑด์—์„œ ์ˆ˜์ค‘์–‘์ƒ์„ ์‹ค์‹œํ•˜์˜€๋‹ค. ๊ท ์—ด ์œ ๋„๊ธฐ๊ฐ„์€ ์žฌ๋ น 28์ผ์ด ๊ฒฝ๊ณผ๋˜์—ˆ์„ ๋•Œ ๊ท ์—ด์„ ์œ ๋„ํ•˜์˜€์œผ๋ฉฐ, ๊ท ์—ดํญ0.1~0.3 mm๊ฐ€ ๋˜๋„๋ก ๊ท ์—ด ์œ ๋ฐœ ํ•„๋ฆ„(์‹ค๋ฆฌ์ฝ˜ ์‹œํŠธ)์„ ์‚ฝ์ž…ํ•˜์—ฌ ๊ท ์—ดํญ์„ ์ œ์–ดํ•˜์˜€๋‹ค. ๋˜ํ•œ ์‹œํ—˜ํŽธ์˜ ๊ท ์—ดํญ ์œ ์ง€๋ฅผ ์œ„ํ•˜์—ฌ ์‹œํ—˜ํŽธ์˜ ์ธก๋ฉด๋ถ€๋ฅผ ๊ณ ์ •ํ•˜์˜€๋‹ค. ๊ท ์—ด์ด ์œ ๋„๋œ ์‹œํ—˜ํŽธ์€ ์น˜์œ ์žฌ๋ น 7์ผ, 14์ผ, 21์ผ ๋ฐ 28์ผ๊ฐ„์˜ ์น˜์œ  ์–‘์ƒ๊ธฐ๊ฐ„์„ ๊ฑฐ์นœ ๋‹ค์Œ ๊ฐ ์žฌ๋ น์ผ์— ํˆฌ์ˆ˜๋Ÿ‰์„ ํ‰๊ฐ€ํ•˜์˜€๋‹ค. ์ •์ˆ˜์œ„ ํˆฌ์ˆ˜์‹œํ—˜์€ Fig. 5์™€ ๊ฐ™์ด ๊ท ์—ด ํญ์„ ์ธก์ •ํ•˜๊ณ  Fig. 6์˜ ์ •์ˆ˜์œ„ ํˆฌ์ˆ˜์‹œํ—˜ ์žฅ๋น„๋ฅผ ํ†ตํ•˜์—ฌ ํˆฌ์ˆ˜๋Ÿ‰์„ ํ‰๊ฐ€ํ•˜์˜€๋‹ค. ์ •์ˆ˜์œ„ ํˆฌ์ˆ˜์‹œํ—˜์€ ์ „์ž์ €์šธ์„ ์ปดํ“จํ„ฐ์— ์—ฐ๊ฒฐํ•˜์—ฌ ์‹ค์‹œ๊ฐ„ ํˆฌ์ˆ˜๋Ÿ‰์„ ์ธก์ •ํ•  ์ˆ˜ ์žˆ๋„๋ก ํ•˜์˜€์œผ๋ฉฐ, ์‹œํ—˜ํŽธ์˜ ํ•จ์ˆ˜์ƒํƒœ๋ฅผ ๋™์ผํ•˜๊ฒŒ ํ•˜๊ธฐ ์œ„ํ•˜์—ฌ ์ตœ์ดˆ 2๋ถ„๊ฐ„์˜ ํˆฌ์ˆ˜๋Ÿ‰์€ ๋ฒ„๋ฆฌ๊ณ  ์ดํ›„ 60์ดˆ๋‹จ์œ„๋กœ 10๋ถ„๊ฐ„ ์ธก์ •ํ•˜์—ฌ ์‹ค์‹œ๊ฐ„ ํˆฌ์ˆ˜๋Ÿ‰(Water flow, ml/min.mm)์„ ์ธก์ •ํ•˜์˜€๋‹ค. ์ž๊ธฐ์น˜์œ  ์„ฑ๋Šฅ์˜ ํ‰๊ฐ€๋Š” ์ดˆ๊ธฐ ๊ท ์—ด์˜ ํˆฌ์ˆ˜๋Ÿ‰(Initial flow)์— ๋Œ€ํ•˜์—ฌ ์น˜์œ ์žฌ๋ น์— ๋”ฐ๋ฅธ ํˆฌ์ˆ˜๋Ÿ‰์˜ ๊ฐ์†Œ์ˆ˜์ค€์„ ํ†ตํ•˜์—ฌ ์น˜์œ ์œจ์„ ํ‰๊ฐ€ํ•˜์˜€๋‹ค(Choi, 2017)(16).

Fig. 4. Induction process of crack

../../Resources/ksm/jksmi.2020.24.1.59/fig4.png

Fig. 5. Measurement of crack width

../../Resources/ksm/jksmi.2020.24.1.59/fig5.png

Fig. 6. Constant Water Head Permeability Test

../../Resources/ksm/jksmi.2020.24.1.59/fig6.png

2.3.6 ๊ท ์—ด๋ฉด ๊ด€์ฐฐ

๊ท ์—ด๋ฉด ๊ด€์ฐฐ์€ ์ •์ˆ˜์œ„ ํˆฌ์ˆ˜์‹œํ—˜์„ ์ˆ˜ํ–‰ํ•˜๋Š” ๊ณผ์ •์—์„œ ์ดˆ๊ธฐ ๊ท ์—ด๊ณผ ์น˜์œ ์žฌ๋ น ์ดํ›„์˜ ๊ท ์—ด์„ ๊ด€์ฐฐํ•˜์—ฌ ร—100์˜ ๋ฐฐ์œจ๋กœ ๊ท ์—ด๋ฉด์„ ๊ด€์ฐฐํ•˜์˜€๋‹ค.

3. ์‹คํ—˜๊ฒฐ๊ณผ ๋ฐ ๊ณ ์ฐฐ

3.1 SHSC ํ˜ผํ•ฉ ์ž๊ธฐ์น˜์œ  HRM์˜ ํ’ˆ์งˆํŠน์„ฑ ํ‰๊ฐ€

3.1.1 ํ…Œ์ด๋ธ” ํ”Œ๋กœ์šฐ ๋ฐ ๊ณต๊ธฐ๋Ÿ‰

Fig. 7์€ SHSC ํ˜ผํ•ฉ์— ๋”ฐ๋ฅธ ์ž๊ธฐ์น˜์œ  HRM์˜ ํ…Œ์ด๋ธ” ํ”Œ๋กœ์šฐ ํ‰๊ฐ€๊ฒฐ๊ณผ๋ฅผ ๋‚˜ํƒ€๋‚ธ ๊ฒƒ์ด๋‹ค. Fig. 7์˜ ๊ฒฐ๊ณผ SHSC์˜ ํ˜ผํ•ฉ์œจ ์ฆ๊ฐ€์— ๋”ฐ๋ผ ํ…Œ์ด๋ธ” ํ”Œ๋กœ์šฐ๊ฐ€ ๋‹ค์†Œ ๊ฐ์†Œํ•˜๋Š” ๊ฒฝํ–ฅ์ด ๋‚˜ํƒ€๋‚ฌ์ง€๋งŒ ๋ฏธ์†Œํ•œ ์ˆ˜์ค€์ด๋ฏ€๋กœ SHSC์˜ ํ˜ผํ•ฉ์— ๋”ฐ๋ฅธ ์˜ํ–ฅ์€ ํฌ์ง€ ์•Š์€ ๊ฒƒ์œผ๋กœ ๋‚˜ํƒ€๋‚ฌ๋‹ค. 30๋ถ„ ๊ฐ„๊ฒฉ์œผ๋กœ 60๋ถ„๊นŒ์ง€ ํ”Œ๋กœ์šฐ ๋กœ์Šค๋ฅผ ํ‰๊ฐ€ํ•œ ๊ฒฐ๊ณผ SHSC ํ˜ผํ•ฉ์œจ์— ๊ด€๊ณ„์—†์ด ๋ชจ๋‘ ํ”Œ๋กœ์šฐ๊ฐ€ ๊ฐ์†Œํ•˜๋Š” ๊ฒฝํ–ฅ์ด ๋‚˜ํƒ€๋‚ฌ์œผ๋ฉฐ, SHSC 10%์˜ ๊ฒฝ์šฐ ์ƒ๋Œ€์ ์œผ๋กœ ๋” ๊ฐ์†Œํ•˜๋Š” ๊ฒƒ์œผ๋กœ ๋‚˜ํƒ€๋‚ฌ๋‹ค. ์ด๋Ÿฌํ•œ ๊ฒฝํ–ฅ์€ SHSC์˜ ํ˜ผํ•ฉ์— ๋”ฐ๋ผ์„œ๋Š” ํฐ ์˜ํ–ฅ์ด ์—†๋Š” ๊ฒƒ์œผ๋กœ ํŒ๋‹จ๋˜์ง€๋งŒ ๋ฐฐํ•ฉ๊ณผ์ •์—์„œ ์ผ๋ถ€ ์†์‹ค๋œ SHSC๊ฐ€ ์‚ฌ์ „๋ฐ˜์‘ํ•จ(Oh, 2017)(16)์— ๋”ฐ๋ผ ๊ฐ์†Œํญ์ด ๋‹ค์†Œ ์ฆ๊ฐ€ํ•œ ๊ฒƒ์œผ๋กœ ํŒ๋‹จ๋œ๋‹ค. Fig. 8์€ SHSC ํ˜ผํ•ฉ์— ๋”ฐ๋ฅธ ์ž๊ธฐ์น˜์œ  HRM์˜ ๊ณต๊ธฐ๋Ÿ‰ ํ‰๊ฐ€๊ฒฐ๊ณผ๋ฅผ ๋‚˜ํƒ€๋‚ธ ๊ฒƒ์ด๋‹ค. Fig. 8์˜ ๊ฒฐ๊ณผ SHSC์˜ ํ˜ผํ•ฉ์— ๊ด€๊ณ„ ์—†์ด ๊ณต๊ธฐ๋Ÿ‰์€ ํฐ ๋ณ€ํ™”๊ฐ€ ์—†๋Š” ๊ฒƒ์œผ๋กœ ๋‚˜ํƒ€๋‚ฌ์œผ๋ฉฐ, ํ˜ผํ•ฉ์œจ์— ๋”ฐ๋ผ์„œ๋„ ์˜ค์ฐจ๋ฒ”์œ„๋‚ด์—์„œ ๋™๋“ฑ์ˆ˜์ค€์ธ ๊ฒƒ์œผ๋กœ ํŒ๋‹จ๋œ๋‹ค.

Fig. 7. Evaluation result of flow by mixing SHSC

../../Resources/ksm/jksmi.2020.24.1.59/fig7.png

Fig. 8. Evaluation result of air content by mixing SHSC

../../Resources/ksm/jksmi.2020.24.1.59/fig8.png

3.1.2 ์••์ถ•๊ฐ•๋„

Fig. 9๋Š” SHSC ํ˜ผํ•ฉ์— ๋”ฐ๋ฅธ ์ž๊ธฐ์น˜์œ  HRM์˜์žฌ๋ น 3์ผ, 7์ผ ๋ฐ 28์ผ ์••์ถ•๊ฐ•๋„ ํ‰๊ฐ€๊ฒฐ๊ณผ๋ฅผ ๋‚˜ํƒ€๋‚ธ ๊ฒƒ์ด๋‹ค. Fig. 9์˜ ๊ฒฐ๊ณผ SHSC์˜ ํ˜ผํ•ฉ์œจ ์ฆ๊ฐ€์— ๋”ฐ๋ผ ๊ฐ์†Œํ•˜๋Š” ๊ฒฝํ–ฅ์ด ๋‚˜ํƒ€๋‚ฌ๋‹ค. ์ด๋Ÿฌํ•œ ๊ฒฐ๊ณผ๋Š” SHSC๊ฐ€ ํŒŒ๊ดด๋˜์ง€ ์ „์—๋Š” ๋ฐ˜์‘ํ•˜์ง€ ๋ชปํ•˜๋Š” ์ž…์ž์ด๊ธฐ ๋•Œ๋ฌธ์— SHSC์˜ ํ˜ผํ•ฉ์— ๋”ฐ๋ผ ์••์ถ•๊ฐ•๋„๊ฐ€ ๊ฐ์†Œํ•˜๋Š” ๊ฒฝํ–ฅ์ด๋‚˜ํƒ€๋‚˜๋Š” ๊ฒƒ์œผ๋กœ ํŒ๋‹จ๋˜๋ฉฐ, ํ˜ผํ•ฉ์œจ์ด ์ฆ๊ฐ€ํ• ์ˆ˜๋ก ๋ฏธ๋ฐ˜์‘์„ฑ ์ž…์ž๊ฐ€ ์ฆ๊ฐ€ํ•˜๊ธฐ ๋•Œ๋ฌธ์— ๊ณจ์žฌ์™€ ๋น„๊ตํ•˜์—ฌ ์ƒ๋Œ€์ ์œผ๋กœ ๊ฐ•๋„๊ฐ€ ์•ฝํ•œ ์ž…์ž์˜ ์ฆ๊ฐ€์— ๊ธฐ์ธํ•œ ๊ฒƒ์œผ๋กœ ํŒ๋‹จ๋œ๋‹ค. SHSC ํ˜ผํ•ฉ์— ๋”ฐ๋ฅธ ์••์ถ•๊ฐ•๋„ ๊ฐ์†Œ์ˆ˜์ค€์€ SHSC ํ˜ผํ•ฉ์œจ 5% ์ฆ๊ฐ€์— ๋”ฐ๋ผ ์•ฝ 5% ๊ฐ์†Œํ•˜๋Š” ๊ฒฝํ–ฅ์ด ๋‚˜ํƒ€๋‚ฌ์œผ๋ฉฐ, SHSC 10%์˜ ๊ฒฝ์šฐ ์ตœ๋Œ€ 10% ๊ฐ์†Œํ•˜๋Š” ๊ฒฐ๊ณผ๊ฐ€ ๋‚˜ํƒ€๋‚ฌ๋‹ค. ์žฌ๋ น์— ๋”ฐ๋ฅธ ์••์ถ•๊ฐ•๋„์˜ ๊ฒฝ์šฐ์—๋Š” SHSC์˜ ํ˜ผํ•ฉ์— ๊ด€๊ณ„์—†์ด ์ผ์ •ํ•˜๊ฒŒ ๊ฐ•๋„๊ฐ€ ๋ฐœํ˜„๋˜๋Š” ๊ฒƒ์œผ๋กœ ๋‚˜ํƒ€๋‚ฌ๋‹ค. ์ด๋Ÿฌํ•œ ๊ฒฐ๊ณผ๋ฅผ ํ†ตํ•˜์—ฌ SHSC ํ˜ผํ•ฉ์— ๋”ฐ๋ผ ์••์ถ•๊ฐ•๋„ ๊ฐ์†Œ๊ฐ€ ๋ฐœ์ƒํ•˜๋ฏ€๋กœ ๋ชฉํ‘œ ์••์ถ•๊ฐ•๋„๋ฅผ ๋งŒ์กฑํ•˜๊ธฐ ์œ„ํ•ด์„œ๋Š” ๊ฐ์ˆ˜์ œ ์‚ฌ์šฉ์— ์˜ํ•œ W/B ๊ฐ์†Œ ๋˜๋Š” ๊ฒฐํ•ฉ์žฌ์˜ ์‚ฌ์šฉ๋Ÿ‰ ์กฐ์ ˆ ๋“ฑ์˜ ๋ฐฐํ•ฉ๋น„ ๋ณด์™„์ด ์š”๊ตฌ๋  ๊ฒƒ์œผ๋กœ ํŒ๋‹จ๋œ๋‹ค.

Fig. 9. Evaluation result of compressive strength by mixing SHSC

../../Resources/ksm/jksmi.2020.24.1.59/fig9.png

Fig. 10. Evaluation result of variation of length by mixing SHSC

../../Resources/ksm/jksmi.2020.24.1.59/fig10.png

3.1.3 ๊ธธ์ด๋ณ€ํ™”

Fig. 10์€ SHSC ํ˜ผํ•ฉ์— ๋”ฐ๋ฅธ ์ž๊ธฐ์น˜์œ  HRM์˜ ๊ธธ์ด๋ณ€ํ™” ํ‰๊ฐ€๊ฒฐ๊ณผ๋ฅผ ๋‚˜ํƒ€๋‚ธ ๊ฒƒ์ด๋‹ค. Fig. 10์˜ ๊ฒฐ๊ณผ SHSC ํ˜ผํ•ฉ ๋ฐ ํ˜ผํ•ฉ์œจ์— ๋”ฐ๋ผ ๋‹ค์†Œ ์ฐจ์ด๊ฐ€ ์žˆ๋Š” ๊ฒƒ์œผ๋กœ ๋‚˜ํƒ€๋‚ฌ์ง€๋งŒ ๋ณ€๋™์ˆ˜์ค€์ด ๋ฏธ์†Œํ•œ ์ˆ˜์ค€์œผ๋กœ ๋‚˜ํƒ€๋‚จ์— ๋”ฐ๋ผ SHSC ํ˜ผํ•ฉ์ด ๊ธธ์ด๋ณ€ํ™”์— ์ง์ ‘์ ์ธ ์˜ํ–ฅ์„ ๋ฏธ์น˜๋Š” ์•Š๋Š” ๊ฒƒ์œผ๋กœ ํŒ๋‹จ๋œ๋‹ค. ์ด๋Ÿฌํ•œ ๊ฒฐ๊ณผ๋ฅผ ํ†ตํ•˜์—ฌ HRM์˜ ๊ฒฝ์šฐ ๊ธธ์ด๋ณ€ํ™”์— ๋”ฐ๋ฅธ ์š”๊ตฌ์กฐ๊ฑด์ด ์กด์žฌํ•˜๊ธฐ ๋•Œ๋ฌธ์— ์ฃผ์š” ํ‰๊ฐ€์š”์†Œ๋กœ ์ž‘์šฉํ•˜์ง€๋งŒ SHSC์˜ ํ˜ผํ•ฉ์— ๋”ฐ๋ฅธ ํ’ˆ์งˆ๋ณ€ํ™”๋Š” ์—†๋Š” ๊ฒƒ์œผ๋กœ ํŒ๋‹จ๋œ๋‹ค.

3.2 SHSC ํ˜ผํ•ฉ ์ž๊ธฐ์น˜์œ  HRM์˜ ์ž๊ธฐ์น˜์œ  ์„ฑ๋Šฅ ํ‰๊ฐ€

3.2.1 ์ •์ˆ˜์œ„ ํˆฌ์ˆ˜์‹œํ—˜

Fig. 11 ๋ฐ Fig. 12๋Š” SHSC ํ˜ผํ•ฉ์— ๋”ฐ๋ฅธ ์ž๊ธฐ์น˜์œ  HRM์˜ ์ •์ˆ˜์œ„ ํˆฌ์ˆ˜์‹œํ—˜ ์ธก์ •๊ฒฐ๊ณผ๋ฅผ ๋‚˜ํƒ€๋‚ธ ๊ฒƒ์ด๋‹ค. Fig. 11์€ ๊ท ์—ดํญ๊ณผ ์ดˆ๊ธฐ ํˆฌ์ˆ˜์œจ์˜ ๊ด€๊ณ„๋ฅผ ๋‚˜ํƒ€๋‚ธ ๊ฒƒ์ด๋‹ค. SHSC ํ˜ผํ•ฉ์— ๋”ฐ๋ฅธ ์ž๊ธฐ์น˜์œ  ์„ฑ๋Šฅ์€ ์ดˆ๊ธฐ ํˆฌ์ˆ˜์œจ์— ๋Œ€ํ•œ ์น˜์œ ์žฌ๋ น ์ดํ›„์˜ ๊ฐ์†Œ์œจ์„ ํ†ตํ•˜์—ฌ ์น˜์œ ์œจ์„ ํ‰๊ฐ€ํ•˜๊ธฐ ๋•Œ๋ฌธ์— ์น˜์œ ๋˜๋Š” ๊ณผ์ •์—์„œ ๊ท ์—ด ํญ ์ธก์ •์ด ์–ด๋ ต๋‹ค(Choi, 2017)(16). ๋”ฐ๋ผ์„œ ์ผ๋ฐ˜์ ์œผ๋กœ ์žฌ๋ น์— ๋”ฐ๋ฅธ ํˆฌ์ˆ˜๋Ÿ‰์„ ์ดˆ๊ธฐ ํˆฌ์ˆ˜๋Ÿ‰์— ๋Œ€ํ•œ ๋น„๋กœ ์ƒ๋Œ€์  ํ‰๊ฐ€๋ฅผ ํ•˜๊ฒŒ ๋˜๋Š”๋ฐ, ์ด๋•Œ ์น˜์œ ์„ฑ๋Šฅ์€ ์ดˆ๊ธฐ ๊ท ์—ดํญ์— ํฐ ์˜ํ–ฅ์„ ๋ฐ›์œผ๋ฏ€๋กœ ์‹œํŽธ์˜ ์ดˆ๊ธฐ ๊ท ์—ดํญ ์ธก์ •๊ฐ’์˜ ์ •ํ™•๋„๊ฐ€ ๋งค์šฐ ์ค‘์š”ํ•˜๋‹ค(Reinhardt, 2003)(12). ์ด์— ๋”ฐ๋ผ ์ดˆ๊ธฐ ํˆฌ์ˆ˜์œจ์˜ ์ˆ˜์ค€์— ๋Œ€ํ•˜์—ฌ ๊ท ์—ด ํญ์ด ์–ด๋Š ์ˆ˜์ค€์ธ์ง€ ์˜ˆ์ธกํ•˜๊ธฐ ์œ„ํ•˜์—ฌ ์ดˆ๊ธฐ ํˆฌ์ˆ˜์œจ๊ณผ ๊ท ์—ดํญ์„ ๋Œ€์กฐํ•˜์—ฌ ๊ด€๊ณ„๋ฅผ ๋ถ„์„ํ•˜์˜€๋‹ค. Fig. 11์˜ ๊ฒฐ๊ณผ ๊ท ์—ดํญ 0.20 mm๋Š” ์ดˆ๊ธฐ ํˆฌ์ˆ˜์œจ 0.5~0.7 ์ˆ˜์ค€์œผ๋กœ ๋‚˜ํƒ€๋‚ฌ์œผ๋ฉฐ, 0.25 mm๋Š” ์ดˆ๊ธฐ ํˆฌ์ˆ˜์œจ 0.7~1.0 ์ˆ˜์ค€์œผ๋กœ ๋‚˜ํƒ€๋‚ฌ๋‹ค. 0.3mm์˜ ๊ฒฝ์šฐ 1.0~1.8 ์ˆ˜์ค€์ธ ๊ฒƒ์œผ๋กœ ๋‚˜ํƒ€๋‚ฌ๋‹ค. Fig. 12๋Š” ์ดˆ๊ธฐ ํˆฌ์ˆ˜์œจ์— ๋Œ€ํ•œ ์น˜์œ ์žฌ๋ น 28์ผํ›„ ํˆฌ์ˆ˜์œจ์„ ๋‚˜ํƒ€๋‚ธ ๊ฒƒ์ด๋‹ค. ๋ถ„์„์€ Fig. 11์˜ ๊ฒฐ๊ณผ๋กœ๋ถ€ํ„ฐ ๊ท ์—ดํญ 0.2 mm, 0.25 mm ๋ฐ 0.3 mm์— ๋Œ€ํ•œ ์ดˆ๊ธฐ ํˆฌ์ˆ˜์œจ ๋ฒ”์œ„๋ฅผ ๊ธฐ์ค€์œผ๋กœ SHSC ํ˜ผํ•ฉ์— ๋”ฐ๋ฅธ ์น˜์œ ์œจ์„ ํ‰๊ฐ€ํ•˜์˜€๋‹ค. Fig. 12์˜ ๊ฒฐ๊ณผ ๊ท ์—ดํญ 0.20 mm์— ํ•ด๋‹นํ•˜๋Š” ์ดˆ๊ธฐ ํˆฌ์ˆ˜์œจ 0.5~0.7 ์˜์—ญ์—์„œ๋Š” SHSC๊ฐ€ ํ˜ผํ•ฉ๋˜์ง€ ์•Š์€ Plain์˜ ๊ฒฝ์šฐ ์•ฝ 80% ํˆฌ์ˆ˜์œจ์ด ๊ฐ์†Œํ•˜๋Š” ๊ฒƒ์œผ๋กœ ๋‚˜ํƒ€๋‚ฌ์ง€๋งŒ SHSC 5% ํ˜ผํ•ฉํ•œ ๊ฒฝ์šฐ์—๋Š” ์•ฝ 90% ํˆฌ์ˆ˜์œจ์ด ๊ฐ์†Œํ•˜๋Š” ๊ฒƒ์œผ๋กœ ๋‚˜ํƒ€๋‚ฌ๋‹ค. SHSC 10% ํ˜ผํ•ฉํ•œ ๊ฒฝ์šฐ์—๋Š” ์•ฝ 99% ๊ฐ์†Œํ•˜๋Š” ๊ฒƒ์œผ๋กœ ๋‚˜ํƒ€๋‚ฌ๋‹ค. SHSC๊ฐ€ ํ˜ผํ•ฉํ•˜์ง€ ์•Š์€ Plain์˜ ๊ฒฝ์šฐ ์•ฝ 80%์˜ ์น˜์œ ์œจ์ด ๋‚˜ํƒ€๋‚œ ์›์ธ์€ ์ผ๋ฐ˜์ ์ธ ๋ฐฐํ•ฉ์˜ ๊ฒฝ์šฐ์—๋„ ๋ฏธ์ˆ˜ํ™” ์‹œ๋ฉ˜ํŠธ ์ž…์ž ๋“ฑ์ด ๋ฐ˜์‘ํ•˜์—ฌ ์ž์—ฐ์ ์ธ ์น˜์œ ์„ฑ๋Šฅ์ด ์žˆ๋Š” ๊ฒƒ์œผ๋กœ ๋ณด๊ณ ๋˜๊ณ  ์žˆ๊ธฐ ๋•Œ๋ฌธ์—(Oh, 2017)(10), Plain์˜ ์น˜์œ ํšจ๊ณผ๊ฐ€ ๋‚˜ํƒ€๋‚œ ๊ฒƒ์œผ๋กœ ํŒ๋‹จ๋œ๋‹ค. ์ด๋Ÿฌํ•œ ๊ฒฐ๊ณผ๋ฅผ ํ†ตํ•˜์—ฌ ๊ท ์—ดํญ 0.2 mm์˜ ๊ฒฝ์šฐ์—๋Š” SHSC 5% ํ˜ผํ•ฉํ•  ๊ฒฝ์šฐ์—๋Š” Plain์˜ ์น˜์œ ์„ฑ๋Šฅ์„ ์•ฝ 10%, SHSC 10% ํ˜ผํ•ฉํ•  ๊ฒฝ์šฐ์—๋Š” Plain์˜ ์น˜์œ ์„ฑ๋Šฅ์„ ์•ฝ 19% ํ–ฅ์ƒ์‹œํ‚ค๋Š” ๊ฒƒ์œผ๋กœ ํŒ๋‹จ๋œ๋‹ค.

Fig. 11. Relationship between initial water flow rate and crack width

../../Resources/ksm/jksmi.2020.24.1.59/fig11.png

Fig. 12. Healing rate according to initial water flow rate

../../Resources/ksm/jksmi.2020.24.1.59/fig12.png

๊ท ์—ดํญ 0.25 mm์— ํ•ด๋‹นํ•˜๋Š” ์ดˆ๊ธฐ ํˆฌ์ˆ˜์œจ 0.7โˆผ1.0 ์˜์—ญ์—์„œ๋Š” SHSC๊ฐ€ ํ˜ผํ•ฉ๋˜์ง€ ์•Š์€ Plain์˜ ๊ฒฝ์šฐ ์•ฝ 75% ํˆฌ์ˆ˜์œจ์ด ๊ฐ์†Œํ•˜๋Š” ๊ฒƒ์œผ๋กœ ๋‚˜ํƒ€๋‚ฌ์ง€๋งŒ SHSC 5% ํ˜ผํ•ฉํ•  ๊ฒฝ์šฐ์—๋Š” ์•ฝ 85% ํˆฌ์ˆ˜์œจ์ด ๊ฐ์†Œํ•˜๋Š” ๊ฒƒ์œผ๋กœ ๋‚˜ํƒ€๋‚ฌ๋‹ค. SHSC 10% ํ˜ผํ•ฉํ•  ๊ฒฝ์šฐ์—๋Š” ์•ฝ 95% ๊ฐ์†Œํ•˜๋Š” ๊ฒƒ์œผ๋กœ ๋‚˜ํƒ€๋‚ฌ๋‹ค. ์ด๋Ÿฌํ•œ ๊ฒฐ๊ณผ๋ฅผ ํ†ตํ•˜์—ฌ ๊ท ์—ดํญ 0.25 mm์˜ ๊ฒฝ์šฐ์—๋Š” SHSC 5% ํ˜ผํ•ฉํ•  ๊ฒฝ์šฐ Plain์˜ ์น˜์œ ์„ฑ๋Šฅ์„ ์•ฝ 10%, SHSC 10% ํ˜ผํ•ฉํ•  ๊ฒฝ์šฐ Plain์˜ ์น˜์œ ์„ฑ๋Šฅ์„ ์•ฝ 20% ํ–ฅ์ƒ์‹œํ‚ค๋Š” ๊ฒƒ์œผ๋กœ ํŒ๋‹จ๋œ๋‹ค. ๊ท ์—ดํญ 0.25โˆผ0.3 mm์— ํ•ด๋‹นํ•˜๋Š” ์ดˆ๊ธฐ ํˆฌ์ˆ˜์œจ 1.0โˆผ1.8 ์˜์—ญ์—์„œ๋Š” SHSC๊ฐ€ ํ˜ผํ•ฉํ•˜์ง€ ์•Š์€ Plain์˜ ๊ฒฝ์šฐ ์ตœ๋Œ€ 60% ์น˜์œ ๋œ ๊ฒƒ์œผ๋กœ ๋‚˜ํƒ€๋‚ฌ์ง€๋งŒ SHSC 5% ํ˜ผํ•ฉํ•  ๊ฒฝ์šฐ์—๋Š” ์•ฝ 80%, SHSC 10% ํ˜ผํ•ฉํ•  ๊ฒฝ์šฐ์—๋Š” ์•ฝ 90% ์น˜์œ ๋œ ๊ฒƒ์œผ๋กœ ๋‚˜ํƒ€๋‚จ์— ๋”ฐ๋ผ ๊ท ์—ดํญ 0.3mm์˜ ๊ฒฝ์šฐ์—๋Š” SHSC 5% ํ˜ผํ•ฉํ•  ๊ฒฝ์šฐ Plain์˜ ์น˜์œ ์„ฑ๋Šฅ์„ ์•ฝ 20%, SHSC 10% ํ˜ผํ•ฉํ•  ๊ฒฝ์šฐ Plain์˜ ์น˜์œ ์„ฑ๋Šฅ์„ ์•ฝ 30% ํ–ฅ์ƒ์‹œํ‚ค๋Š” ๊ฒƒ์œผ๋กœ ํŒ๋‹จ๋œ๋‹ค.

๋˜ํ•œ SHSC ํ˜ผํ•ฉ์œจ์— ๋”ฐ๋ฅธ ์น˜์œ ์œจ์€ ํ˜ผํ•ฉ์œจ 5%๊ฐ€ ์ฆ๊ฐ€ ํ•จ์— ๋”ฐ๋ผ ๊ท ์—ดํญ 0.20 mm์˜ ๊ฒฝ์šฐ ์•ฝ 9%, ๊ท ์—ดํญ 0.25mm์˜ ๊ฒฝ์šฐ ์•ฝ 10%, ๊ท ์—ดํญ 0.3 mm์˜ ๊ฒฝ์šฐ 10%์˜ ์น˜์œ ์œจ์ด ์ฆ๊ฐ€ํ•˜๋Š” ๊ฒƒ์œผ๋กœ ๋‚˜ํƒ€๋‚จ์— ๋”ฐ๋ผ SHSC 5% ๋ฐ SHSC 10%์˜ ์„ฑ๋Šฅ์€ ์ผ๋ฅ ์ ์œผ๋กœ ์•ฝ 10%์˜ ํšจ๊ณผ์ฐจ์ด๊ฐ€ ์žˆ๋Š” ๊ฒƒ์œผ๋กœ ๋‚˜ํƒ€๋‚ฌ๋‹ค.

Fig. 13. Observation result of crack surface (Plain)

../../Resources/ksm/jksmi.2020.24.1.59/fig13.png

Fig. 14. Observation result of crack surface (SHSC)

../../Resources/ksm/jksmi.2020.24.1.59/fig14.png

3.2.2 ๊ท ์—ด๋ฉด ๊ด€์ฐฐ

Fig. 13 ๋ฐ Fig. 14๋Š” Plain ๋ฐ SHSC๋ฅผ ํ˜ผํ•ฉํ•œ ์‹œํ—˜ํŽธ์˜ ๊ท ์—ด ์ดˆ๊ธฐ ๋ฐ ์ž๊ธฐ์น˜์œ  ์ดํ›„ ์˜ ๊ท ์—ด๋ฉด ๊ด€์ฐฐ ๊ฒฐ๊ณผ๋ฅผ ๋‚˜ํƒ€๋‚ธ ๊ฒƒ์ด๋‹ค. Fig. 13 ๋ฐ Fig. 14์˜ ๊ฒฐ๊ณผ ์ดˆ๊ธฐ ๊ท ์—ด๋ฉด์— ๋Œ€ํ•œ ์น˜์œ  ํ›„ ๊ท ์—ด๋ฉด ๊ด€์ฐฐ๊ฒฐ๊ณผ Plain์˜ ๊ฒฝ์šฐ ์น˜์œ ์žฌ๋ น 28์ผ ํ›„ ์ผ๋ถ€ ๊ตฌ๊ฐ„์—์„œ ๋ฐ˜์‘์ƒ์„ฑ๋ฌผ์„ ๊ด€์ฐฐํ•  ์ˆ˜ ์žˆ์—ˆ์ง€๋งŒ ์บก์Š์ด ํ˜ผํ•ฉ๋œ ๊ฒฝ์šฐ์™€ ๋น„๊ตํ•˜์—ฌ ์ƒ๋Œ€์ ์œผ๋กœ ์ ๊ฒŒ ๊ด€์ฐฐ๋˜์—ˆ์œผ๋ฉฐ, SHSC๋ฅผ ํ˜ผํ•ฉํ•œ ๊ฒฝ์šฐ ๋Œ€๋ถ€๋ถ„์˜ ๊ท ์—ด๋ฉด์ด ๋ฐ˜์‘ ์ƒ์„ฑ๋ฌผ์— ์˜ํ•˜์—ฌ ์ˆ˜๋ณต๋œ ๊ฒƒ์„ ํ™•์ธํ•  ์ˆ˜ ์žˆ์—ˆ๋‹ค. ์ด๋Ÿฌํ•œ ๊ฒฐ๊ณผ๋Š” Plain์˜ ๊ฒฝ์šฐ ๋ฏธ์ˆ˜ํ™” ๊ฒฐํ•ฉ์žฌ์˜ ์ง€์†์ ์ธ ์ˆ˜ํ™”(further hydration) ๋ฐ ์ถ”๊ฐ€ ์ˆ˜ํ™” ํšจ๊ณผ์— ์˜ํ•˜์—ฌ ๋ฐ˜์‘์ƒ์„ฑ๋ฌผ์ด ๊ท ์—ด๋ฉด์— ๋ฐœ์ƒ๋œ ๊ฒƒ์œผ๋กœ ํŒ๋‹จ๋˜๋ฉฐ, SHSC์˜ ํšจ๊ณผ๋Š” ์ž๊ธฐ์น˜์œ  ์†Œ์žฌ๋กœ์จ AG์˜ ๊ฒฐ์ •๋ฌผ์ธ ์œก๊ฐํŒ์ƒ์˜ ๊ฒฐ์ •๊ณผ CSA์˜ ์นจ์ƒํ˜• ๊ฒฐ์ •๋“ค์— ์˜ํ•˜์—ฌ Plain์˜ ์น˜์œ ํšจ๊ณผ๋ฅผ ํ–ฅ์ƒ์‹œ์ผœ Crack closing ํšจ๊ณผ๊ฐ€ ์ปค์ง€๋Š” ๊ฒƒ์œผ๋กœ ํŒ๋‹จ๋œ๋‹ค.

4. ๊ฒฐ ๋ก 

๋ณธ ๋…ผ๋ฌธ์€ ์ž๊ธฐ์น˜์œ  ์†Œ์žฌ๋กœ์จ ๊ฒฐ์ •์„ฑ์žฅํ˜• ๋ฌด๊ธฐ๊ณ„ ๋ถ„์ฒด๋ฅผ ํ™œ์šฉํ•œ ์ž๊ธฐ์น˜์œ  ๊ณ ์ƒ์บก์Š(Self-Healing Solid Capsules)์„ ์ œ์กฐํ•˜์˜€์œผ๋ฉฐ, ์ž๊ธฐ์น˜์œ  ๊ณ ์ƒ์บก์Š์„ ํ˜ผํ•ฉํ•œ ๋ณด์ˆ˜ ๋ชจ๋ฅดํƒ€๋ฅด์˜ ํ’ˆ์งˆํŠน์„ฑ ๋ฐ ๊ท ์—ด ์ž๊ธฐ์น˜์œ  ์„ฑ๋Šฅ์„ ํ‰๊ฐ€ํ•œ ๊ฒฐ๊ณผ ๋‹ค์Œ๊ณผ ๊ฐ™์€ ๊ฒฐ๋ก ์„ ์–ป์„ ์ˆ˜ ์žˆ์—ˆ๋‹ค.

1. ๊ฒฐ์ •์„ฑ์žฅํ˜• ์ž๊ธฐ์น˜์œ  ๊ณ ์ƒ์บก์Š์„ ํ˜ผํ•ฉํ•œ ๋ณด์ˆ˜ ๋ชจ๋ฅดํƒ€๋ฅด์˜ ํ…Œ์ด๋ธ” ํ”Œ๋กœ์šฐ ๋ฐ ๊ณต๊ธฐ๋Ÿ‰ ํ‰๊ฐ€๊ฒฐ๊ณผ ๊ณ ์ƒ์บก์Š ํ˜ผํ•ฉ์œจ ์ฆ๊ฐ€์— ๋”ฐ๋ผ ํ…Œ์ด๋ธ” ํ”Œ๋กœ์šฐ ๋ฐ ๊ณต๊ธฐ๋Ÿ‰์ด ๋‹ค์†Œ ๊ฐ์†Œํ•˜๋Š” ๊ฒฝํ–ฅ์ด ๋‚˜ํƒ€๋‚ฌ์ง€๋งŒ ํ’ˆ์งˆ๋ณ€๋™์ด ํฌ์ง€ ์•Š์œผ๋ฏ€๋กœ ๊ณ ์ƒ์บก์Š์ด ๋ฏธ์น˜๋Š” ์˜ํ–ฅ์€ ๊ณ ๋ คํ•  ํ•„์š”๊ฐ€ ์—†๋Š” ๊ฒƒ์œผ๋กœ ํŒ๋‹จ๋œ๋‹ค.

2. ๊ฒฐ์ •์„ฑ์žฅํ˜• ์ž๊ธฐ์น˜์œ  ๊ณ ์ƒ์บก์Š์„ ํ˜ผํ•ฉํ•œ ๋ณด์ˆ˜ ๋ชจ๋ฅดํƒ€๋ฅด์˜ ์••์ถ•๊ฐ•๋„ ํ‰๊ฐ€๊ฒฐ๊ณผ ๊ณ ์ƒ์บก์Š ํ˜ผํ•ฉ์œจ ์ฆ๊ฐ€์— ๋”ฐ๋ผ ์ตœ๋Œ€ 10% ๊ฐ์†Œํ•˜๋Š” ๊ฒฝํ–ฅ์ด ๋‚˜ํƒ€๋‚จ์— ๋”ฐ๋ผ ๋ชฉํ‘œ ๊ฐ•๋„๋ฅผ ๋งŒ์กฑํ•˜๊ธฐ ์œ„ํ•ด์„œ๋Š” ๊ฐ์ˆ˜์ œ ์‚ฌ์šฉ์— ์˜ํ•œ W/B ๊ฐ์†Œ ๋˜๋Š” ๊ฒฐํ•ฉ์žฌ์˜ ์‚ฌ์šฉ๋Ÿ‰ ์กฐ์ ˆ ๋“ฑ์˜ ๋ฐฐํ•ฉ๋น„ ๋ณด์™„์ด ํ•„์š”ํ•œ ๊ฒƒ์œผ๋กœ ํŒ๋‹จ๋œ๋‹ค.

3. ๊ฒฐ์ •์„ฑ์žฅํ˜• ์ž๊ธฐ์น˜์œ  ๊ณ ์ƒ์บก์Š์„ ํ˜ผํ•ฉํ•œ ๋ณด์ˆ˜ ๋ชจ๋ฅดํƒ€๋ฅด์˜ ์ž๊ธฐ์น˜์œ  ์„ฑ๋Šฅ ํ‰๊ฐ€๊ฒฐ๊ณผ ์ž๊ธฐ์น˜์œ  ๊ณ ์ƒ์บก์Š ํ˜ผํ•ฉ์— ์˜ํ•˜์—ฌ ์ž์—ฐ์ ์ธ ์น˜์œ ์„ฑ๋Šฅ์— ๋Œ€ํ•˜์—ฌ ํ˜ผํ•ฉ๋ฅ  5%์˜ ๊ฒฝ์šฐ ์•ฝ 10%, ํ˜ผํ•ฉ๋ฅ  10%์˜ ๊ฒฝ์šฐ ์•ฝ 20~30% ํ–ฅ์ƒ์‹œํ‚ค๋Š” ํšจ๊ณผ๊ฐ€ ๋‚˜ํƒ€๋‚ฌ์œผ๋ฉฐ, ๊ฒฐ์ •์„ฑ์žฅํ˜• ๊ฒฐ์ •์— ์˜ํ•˜์—ฌ Crack closing ํšจ๊ณผ๊ฐ€ ์ปค์ง€๋Š” ๊ฒƒ์œผ๋กœ ํŒ๋‹จ๋œ๋‹ค.

์ด๋Ÿฌํ•œ ๊ฒฐ๊ณผ๋ฅผ ํ†ตํ•˜์—ฌ ๊ฒฐ์ •์„ฑ์žฅํ˜• ์ž๊ธฐ์น˜์œ  ๊ณ ์ƒ์บก์Š์€ ์ž์—ฐ์ ์ธ ์น˜์œ ์„ฑ๋Šฅ์„ ํ–ฅ์ƒ์‹œํ‚ค๋Š” ํšจ๊ณผ๊ฐ€ ๋‚˜ํƒ€๋‚จ์— ๋”ฐ๋ผ ์ด๋ฅผ ํ˜ผํ•ฉํ•œ ๋ณด์ˆ˜ ๋ชจ๋ฅดํƒ€๋ฅด๋ฅผ ํ™œ์šฉํ•˜์—ฌ ๋Œ€๋‹จ๋ฉด ๋ณด์ˆ˜๋ฅผ ์ˆ˜ํ–‰ํ•  ๊ฒฝ์šฐ 2์ฐจ์ ์ธ ๊ท ์—ด์— ๋Œ€ํ•˜์—ฌ ์น˜์œ ํšจ๊ณผ๋ฅผ ๊ธฐ๋Œ€ํ•  ์ˆ˜ ์žˆ์„ ๊ฒƒ์œผ๋กœ ํŒ๋‹จ๋˜๋ฉฐ, ํ—ˆ์šฉ๊ท ์—ดํญ ์ด๋‚ด์—์„œ ์ถ”๊ฐ€์ ์ธ ์œ ์ง€๋ณด์ˆ˜์˜ ๊ฐ์†Œํšจ๊ณผ์— ๋”ฐ๋ผ ๊ฒฝ์ œ์ ์ธ ์ธก๋ฉด์—์„œ ์–ป์„ ์ˆ˜ ์žˆ๋Š” ํšจ๊ณผ๋Š” ๋”์šฑ ํด ๊ฒƒ์œผ๋กœ ์‚ฌ๋ฃŒ๋œ๋‹ค.

๊ฐ์‚ฌ์˜ ๊ธ€

๋ณธ ์—ฐ๊ตฌ๋Š” ๊ตญํ† ๊ตํ†ต๋ถ€ ๊ตญํ† ๊ตํ†ต๊ธฐ์ˆ ์—ฐ๊ตฌ๊ฐœ๋ฐœ์‚ฌ์—…์˜ ์—ฐ๊ตฌ๋น„ ์ง€์›(19SCIP-B103706-05)์— ์˜ํ•˜์—ฌ ์ˆ˜ํ–‰๋˜์—ˆ์Šต๋‹ˆ๋‹ค. ์ˆ˜ํ–‰๋˜์—ˆ์Šต๋‹ˆ๋‹ค. ์ด์— ๊ฐ์‚ฌ๋“œ๋ฆฝ๋‹ˆ๋‹ค.

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