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  1. ๊ฐ•๋ฆ‰์›์ฃผ๋Œ€ํ•™๊ต ๋ฐฉ์žฌ์—ฐ๊ตฌ์†Œ ์—ฐ๊ตฌ๊ต์ˆ˜ (Research Professor, Institute for Disaster Prevention, Gangneung-Wonju National University, Gangneung 25457, Rep. of Korea)
  2. ํ•œ๊ตญ๊ฑด์„ค์ƒํ™œํ™˜๊ฒฝ์‹œํ—˜์—ฐ๊ตฌ์› ์ฑ…์ž„์—ฐ๊ตฌ์› (Principal Research Engineer, Construction Technology Research Center, Korea Conformity Laboratories, Seoul 08503, Rep. of Korea)
  3. ๊ฐ•๋ฆ‰์›์ฃผ๋Œ€ํ•™๊ต ํ† ๋ชฉ๊ณตํ•™๊ณผ ๊ต์ˆ˜ (Professor, Department of Civil Engineering, Ganwneung-Wonju National University, Gangneung 25457, Rep. of Korea)



์ฝ˜ํฌ๋ฆฌํŠธ, ๋ชจ๋ฅดํƒ€๋ฅด, ํ”ผํ†ค์น˜๋“œ, ํผ์•Œ๋ฐํ•˜์ด๋“œ ๋†๋„, ๊ธฐ์ดˆ๋ฌผ์„ฑ
concrete, mortar, phytoncide, formaldehyde concentration, fundamental properties

1. ์„œ ๋ก 

์ตœ๊ทผ ์ฝ”๋กœ๋‚˜๋ฐ”์ด๋Ÿฌ์Šค(COVID-19)๋กœ ์ธํ•œ ํŒฌ๋ฐ๋ฏน(pandemic)๊ณผ ๋ฏธ์„ธ๋จผ์ง€์˜ ์˜ํ–ฅ์œผ๋กœ ํ˜„๋Œ€์ธ๋“ค์€ ์‹ค๋‚ด์—์„œ์˜ ๊ฑฐ์ฃผ์‹œ๊ฐ„์ด ๊ธ‰๊ฒฉํžˆ ์ฆ๊ฐ€ํ•˜๊ณ  ์žˆ๋‹ค. ๋”ฐ๋ผ์„œ ๊ฑด๊ฐ•๊ณผ ์ƒํ™œํ™˜๊ฒฝ ๊ฐœ์„  ์ธก๋ฉด์—์„œ ๊ฑฐ์ฃผ ๊ณต๊ฐ„ ๋ฐ ์ƒํ™œ๊ณต๊ฐ„์—์„œ์˜ ์‹ค๋‚ด ๊ณต๊ธฐ์งˆ์— ๋Œ€ํ•œ ๊ด€์‹ฌ์ด ์ฆ๊ฐ€ํ•˜๊ณ  ์žˆ๋‹ค. ์‹ค๋‚ด๊ณต๊ธฐ์˜ค์—ผ์˜ ์ฃผ์š” ์›์ธ์€ ํผ์•Œ๋ฐํ•˜์ด๋“œ(HCHO)์™€ ํœ˜๋ฐœ์„ฑ์œ ๊ธฐํ™”ํ•ฉ๋ฌผ(VOCs)๋กœ ์•Œ๋ ค์ ธ ์žˆ๋‹ค. ์ด๋“ค์€ ๊ฐ€๊ตฌ, ๊ฑด์ถ•์ž์žฌ, ์ ‘์ฐฉ์ œ ๋“ฑ์—์„œ ๋ฐฉ์ถœ๋˜๋ฉฐ ์ƒˆ์ง‘์ฆํ›„๊ตฐ(sick house syndrome), ๊ฑด๋ฌผ์ฆํ›„๊ตฐ(sick building syndrome) ๋“ฑ์„ ์œ ๋ฐœํ•˜๋Š” ๋Œ€ํ‘œ์ ์ธ ๋ฌผ์งˆ๋กœ, ์šฐ๋ฆฌ์˜ ๊ฑด๊ฐ•์„ ํฌ๊ฒŒ ์œ„ํ˜‘ํ•˜๊ณ  ์žˆ๋‹ค(Yu et al. 2005; Choi et al. 2009; Kim and Yoo 2009; Yoo 2010; Yun et al. 2010)(210,16,17,18). ๋˜ํ•œ, ์™ธ๋ถ€์—์„œ ์œ ์ž…๋˜๋Š” ๋ฏธ์„ธ๋จผ์ง€(PM10)์™€ ์ดˆ๋ฏธ์„ธ๋จผ์ง€(PM2.5)๋กœ ์ธํ•ด ์ฐฝ๋ฌธ์„ ์ด์šฉํ•œ ์‹ค๋‚ด ํ™˜๊ธฐ๋งˆ์ € ์‰ฝ์ง€ ์•Š์•„ ์‹ค๋‚ด ๊ณต๊ธฐ์งˆ์€ ํฌ๊ฒŒ ์•…ํ™”๋  ์ˆ˜ ๋ฐ–์— ์—†๋Š” ์ƒํ™ฉ์ด๋‹ค. ์ด๋ฅผ ํ•ด๊ฒฐํ•˜๊ธฐ ์œ„ํ•ด ์ •๋ถ€๋Š” โ€˜๋‹ค์ค‘์ด์šฉ์‹œ์„ค ๋“ฑ์˜ ์‹ค๋‚ด ๊ณต๊ธฐ์งˆ ๊ด€๋ฆฌ๋ฒ•โ€™์„ ๊ฐœ์ •ํ•˜์—ฌ ์ง€์†์ ์œผ๋กœ ์‹ค๋‚ด ๊ณต๊ธฐ์งˆ์„ ์•Œ๋งž๊ฒŒ ์œ ์ง€ํ•  ์ˆ˜ ์žˆ๋„๋ก ๊ด€๋ฆฌํ•˜๊ณ  ์žˆ๋‹ค.

๊ธฐ์กด ์—ฐ๊ตฌ์—์„œ ํผ์•Œ๋ฐํ•˜์ด๋“œ์™€ ํœ˜๋ฐœ์„ฑ์œ ๊ธฐํ™”ํ•ฉ๋ฌผ์„ ์ œ๊ฑฐํ•˜์—ฌ ์‹ค๋‚ด ๊ณต๊ธฐ์งˆ์„ ๊ฐœ์„ ์‹œํ‚ค๊ธฐ ์œ„ํ•œ ๋ฌผ์งˆ๋กœ ๊ทœ์กฐํ† (diatomite), ํ”ผํ†ค์น˜๋“œ(phytoncide), ์•ผ์žํ™œ์„ฑํƒ„(palm active carbon), ์ œ์˜ฌ๋ผ์ดํŠธ๊ณ„ ๋ถ„๋ง(zeolite) ๋“ฑ์ด ๋ชจ๋ฅดํƒ€๋ฅด์— ์‚ฌ์šฉ๋˜์—ˆ์œผ๋ฉฐ(Lim et al. 2007; Lee et al. 2016; Kim et al. 2019; Ren et al. 2020)(8,13,14,15), ์ด ์™ธ์—๋„ ์นœํ™˜๊ฒฝ์ž์žฌ ๋ฐ ํก์ฐฉ์ œ์˜ ์‹ค์ œ์ ์ธ ์‹ค๋‚ด ๊ณต๊ธฐ์งˆ ๊ฐœ์„ ํšจ๊ณผ๋ฅผ ํ‰๊ฐ€ํ•œ ์—ฐ๊ตฌ๋„ ์ง„ํ–‰๋˜์—ˆ๋‹ค(Jo and Sohn 2008). ๋ณธ ์—ฐ๊ตฌ์—์„œ๋Š” ํผ์•Œ๋ฐํ•˜์ด๋“œ๋ฅผ ์ œ๊ฑฐํ•˜๊ธฐ ์œ„ํ•œ ๋ฌผ์งˆ๋กœ ํ”ผํ†ค์น˜๋“œ๋ฅผ ์„ ํƒํ•˜์—ฌ ์—ฐ๊ตฌ๋ฅผ ์ง„ํ–‰ํ•˜์˜€๋‹ค. ํ”ผํ†ค์น˜๋“œ๋Š” ๊ทธ๋ฆฌ์Šค์–ด๋กœ โ€˜์‹๋ฌผ(phyton)โ€™๊ณผ โ€˜์ฃฝ์ด๋‹ค(cide)โ€™์˜ ํ•ฉ์„ฑ์–ด๋กœ ์ˆ˜๋ชฉ์ด ์™ธ๋ถ€ ํ•ด์ถฉ์ด๋‚˜ ๋ฏธ์ƒ๋ฌผ๋กœ๋ถ€ํ„ฐ ์ž์‹ ์„ ๋ณดํ˜ธํ•˜๊ธฐ ์œ„ํ•ด ๋ฐœ์‚ฐํ•˜๋Š” ์ฒœ์—ฐ ํ•ญ๊ท ๋ฌผ์งˆ์ด๋‹ค. ์ผ๋ฐ˜์ ์œผ๋กœ ํ™œ์—ฝ์ˆ˜๋ณด๋‹ค๋Š” ์นจ์—ฝ์ˆ˜(ํŽธ๋ฐฑ๋‚˜๋ฌด, ์†Œ๋‚˜๋ฌด, ์žฃ๋‚˜๋ฌด ๋“ฑ)์—์„œ ๋งŽ์ด ๋ฐฉ์ถœ๋˜๋Š” ๊ฒƒ์œผ๋กœ ์•Œ๋ ค์ ธ ์žˆ์œผ๋ฉฐ, ์ฃผ์„ฑ๋ถ„์€ ํ…Œ๋ฅดํŽœ(terpene)์ด๋ผ๋Š” ์œ ๊ธฐํ™”ํ•ฉ๋ฌผ์ด๋‹ค(Lee et al. 2015; Lee et al. 2016)(12,13). ์‹๋ฌผ์€ ์ฃผ๋กœ ํ…Œ๋ฅดํŽœ์„ ๋ฏธ์ƒ๋ฌผ ๋ฐ ์ดˆ์‹ ๋™๋ฌผ์— ๋Œ€ํ•œ ๋ฐฉ์–ด ๋ฐ ๊ณต๊ฒฉ ๋ฌผ์งˆ๋กœ ์‚ฌ์šฉํ•œ๋‹ค(Breitmaier 2006). ์ด๋Ÿฌํ•œ ์„ฑ๋ถ„์œผ๋กœ ์ธํ•ด ํ”ผํ†ค์น˜๋“œ๋Š” ํ•ญ๊ท , ๋ฐฉ์ถฉ, ํƒˆ์ทจ, ์†Œ์ทจ์ž‘์šฉ์˜ ํšจ๊ณผ๊ฐ€ ์žˆ๊ณ , VOCs ๋ฐ ํผ์•Œ๋ฐํ•˜์ด๋“œ ๋“ฑ ์œ ํ•ด๋ฌผ์งˆ์˜ ์ œ๊ฑฐ์—๋„ ํšจ๊ณผ๊ฐ€ ์žˆ๋Š” ๊ฒƒ์œผ๋กœ ์•Œ๋ ค์ ธ ์žˆ๋‹ค(Kim and Kim 2010)(11).

๋”ฐ๋ผ์„œ ๋ณธ ์—ฐ๊ตฌ์—์„œ๋Š” ํ”ผํ†ค์น˜๋“œ๋ฅผ ํ˜ผ์ž…ํ•œ ๋ชจ๋ฅดํƒ€๋ฅด ๋ฐ ์ฝ˜ํฌ๋ฆฌํŠธ์˜ ์‹ค๋‚ด ๊ณต๊ธฐ์งˆ ๊ฐœ์„  ํšจ๊ณผ๋ฅผ ํ‰๊ฐ€ํ•˜๊ธฐ ์œ„ํ•ด ๊ธฐ์ดˆ ๋ฌผ์„ฑ ๋ฐ ํผ์•Œ๋ฐํ•˜์ด๋“œ ๋†๋„ ๋ณ€ํ™”๋ฅผ ์ธก์ •ํ•˜์˜€๋‹ค. ํ”ผํ†ค์น˜๋“œ์˜ ํ˜ผ์ž…์œผ๋กœ ์ธํ•œ ๋ชจ๋ฅดํƒ€๋ฅด ๋ฐ ์ฝ˜ํฌ๋ฆฌํŠธ์˜ ์‹œ๊ณต์„ฑ๊ณผ ์••์ถ•๊ฐ•๋„ ๋“ฑ์„ ํ‰๊ฐ€ํ•˜๊ณ , ๋ฐ์‹œ์ผ€์ดํ„ฐ๋ฒ•์„ ์ด์šฉํ•˜์—ฌ ํผ์•Œ๋ฐํ•˜์ด๋“œ์˜ ๋†๋„ ๋ณ€ํ™”๋ฅผ ํ‰๊ฐ€ํ•˜์˜€๋‹ค. ์—ฐ๊ตฌ ์ง„ํ–‰ ๊ฐœ์š”๋Š” Fig. 1์— ๋‚˜ํƒ€๋‚ด์—ˆ๋‹ค.

Fig. 1 Research framework

../../Resources/kci/JKCI.2021.33.5.531/fig1.png

2. ์‹คํ—˜๊ณ„ํš ๋ฐ ๋ฐฉ๋ฒ•

2.1 ์‹คํ—˜ ๊ณ„ํš

๋ณธ ์—ฐ๊ตฌ์—์„œ๋Š” ํ”ผํ†ค์น˜๋“œ๊ฐ€ ํ˜ผ์ž…๋œ ์ฝ˜ํฌ๋ฆฌํŠธ์˜ ์‹œ๊ณต์„ฑ, ์••์ถ•๊ฐ•๋„, ํƒ„์„ฑ๊ณ„์ˆ˜, ํผ์•Œ๋ฐํ•˜์ด๋“œ ๋†๋„ ๋ณ€ํ™”๋ฅผ ์ธก์ •ํ•˜์—ฌ ํ”ผํ†ค์น˜๋“œ์˜ ์‚ฌ์šฉ ๊ฐ€๋Šฅ์„ฑ์„ ํ‰๊ฐ€ํ•˜์˜€๋‹ค. ์ด๋ฅผ ์œ„ํ•ด ๋ชจ๋ฅดํƒ€๋ฅด์˜ ์‹œ๊ณต์„ฑ, ์••์ถ•๊ฐ•๋„, ํผ์•Œ๋ฐํ•˜์ด๋“œ ๋†๋„ ๋ณ€ํ™”๋ฅผ ์ธก์ •ํ•˜์˜€๊ณ , ์ดํ›„ ์ฝ˜ํฌ๋ฆฌํŠธ ๋ฐฐํ•ฉ์—์„œ ์‹คํ—˜๋ณ€์ˆ˜๋ฅผ ์ถ”๊ฐ€ํ•˜์—ฌ ์‹คํ—˜์„ ์ง„ํ–‰ํ•˜์˜€๋‹ค. ๋ชจ๋ฅดํƒ€๋ฅด์—์„œ๋Š” ๋ฌผ-์‹œ๋ฉ˜ํŠธ๋น„ 50 %๋งŒ ์‚ฌ์šฉํ•˜์˜€๊ณ , ์ฝ˜ํฌ๋ฆฌํŠธ์—์„œ๋Š” ๋ฌผ-๊ฒฐํ•ฉ์žฌ ๋น„ 40 %, 50 %๋ฅผ ์‚ฌ์šฉํ•˜์˜€๋‹ค. ์ด๋•Œ, ์ฝ˜ํฌ๋ฆฌํŠธ ๋ฌผ-๊ฒฐํ•ฉ์žฌ ๋น„ 50 %์˜ ๊ฒฝ์šฐ ๊ณ ๋กœ์Šฌ๋ž˜๊ทธ(BFS)๊ฐ€ ํ˜ผ์ž…๋œ ๋ฐฐํ•ฉ์„ ์ถ”๊ฐ€ํ•˜์˜€๋‹ค. ํ”ผํ†ค์น˜๋“œ๋Š” ๋ฐฐํ•ฉ์ˆ˜ ์งˆ๋Ÿ‰์˜ 0(Ref.), 2 %, 4 %, 6 %๋ฅผ ์‚ฌ์šฉํ•˜์˜€๊ณ , ๋ฐฐํ•ฉ์ˆ˜๋ฅผ ๋Œ€์ฒดํ•˜์—ฌ ํ˜ผ์ž…ํ•˜์˜€๋‹ค. ์‹คํ—˜์— ์‚ฌ์šฉ๋œ ๋ณ€์ˆ˜๋ฅผ Table 1์— ๋‚˜ํƒ€๋‚ด์—ˆ๊ณ , ๋ชจ๋ฅดํƒ€๋ฅด ๋ฐ ์ฝ˜ํฌ๋ฆฌํŠธ์˜ ๋ฐฐํ•ฉํ‘œ๋ฅผ Table 2์™€ Table 3์— ๊ฐ๊ฐ ๋‚˜ํƒ€๋‚ด์—ˆ๋‹ค.

2.2 ์‚ฌ์šฉ์žฌ๋ฃŒ

2.2.1 ํ”ผํ†ค์น˜๋“œ(phytoncide)

๊ตญ๋‚ด์— ์œ ํ†ต๋˜๋Š” ํ”ผํ†ค์น˜๋“œ ๋Œ€๋ถ€๋ถ„์€ ํŽธ๋ฐฑ๋‚˜๋ฌด์—์„œ ์ถ”์ถœํ•œ ์ œํ’ˆ์œผ๋กœ, ํ”ผํ†ค์น˜๋“œ๋ฅผ ๋น„๊ต์  ๋งŽ์ด ๋ฐฐ์ถœํ•˜๋Š” ๋‚˜๋ฌด๋กœ ์•Œ๋ ค์ง„ ํŽธ๋ฐฑ๋‚˜๋ฌด์˜ ์žŽ์„ ๊ฑด์กฐ ๋ฐ ํŒŒ์‡„ ํ›„ ์ €์˜จ๊ณ ์•• ์ถ”์ถœ๊ณผ์ •์„ ํ†ตํ•˜์—ฌ ํ”ผํ†ค์น˜๋“œ๋ฅผ ์–ป์„ ์ˆ˜ ์žˆ๋‹ค. ๋ณธ ์—ฐ๊ตฌ์— ์‚ฌ์šฉ๋œ ํ”ผํ†ค์น˜๋“œ๋Š” ์‚ฌ์ „์‹คํ—˜์„ ํ†ตํ•˜์—ฌ ๊ฒฐ์ •ํ•˜์˜€๋‹ค. ๋‘ ์ข…๋ฅ˜์˜ ํ”ผํ†ค์น˜๋“œ(S์‚ฌ, B์‚ฌ)๋ฅผ ์‚ฌ์šฉํ•˜์—ฌ ๋ชจ๋ฅดํƒ€๋ฅด์˜ ํ”Œ๋กœ, ์••์ถ•๊ฐ•๋„, ํผ์•Œ๋ฐํ•˜์ด๋“œ ๋†๋„ ๋ณ€ํ™”๋ฅผ ํ‰๊ฐ€ํ•˜์˜€๊ณ , ์ƒ๋Œ€์ ์œผ๋กœ ํผ์•Œ๋ฐํ•˜์ด๋“œ ๋†๋„ ์ €๊ฐ์— ํšจ๊ณผ๊ฐ€ ์žˆ๋Š” B์‚ฌ์˜ ํ”ผํ†ค์น˜๋“œ๋ฅผ ์‚ฌ์šฉํ•˜๊ธฐ๋กœ ๊ฒฐ์ •ํ•˜์˜€๋‹ค. ๋”ฐ๋ผ์„œ ๋ณธ ์—ฐ๊ตฌ์—์„œ ์‚ฌ์šฉ๋œ ํ”ผํ†ค์น˜๋“œ๋Š” B์‚ฌ๋ฅผ ํ†ตํ•ด ์œ ํ†ต๋˜๋Š” ํŽธ๋ฐฑ๋‚˜๋ฌด ์ถ”์ถœ ์›์•ก(ํŽธ๋ฐฑ์ˆ˜) ์ œํ’ˆ์ด๋‹ค.

Table 1 Test variables

Conditions

Variables

Mortar

Concrete

W/B (%)

50

40, 50

Binder

Cement

Cement, BFS (blast furnace slag)

Phytoncide substitution ratio (Wร—%)

0 (Ref.), 2, 4, 6

0 (Ref.), 2, 4, 6

Specimen size (mm)

50ร—50ร—50

โˆ…100ร—200

Curing condition

(20 ยฐC, RH 60 %)

Sealed curing

Sealed curing

Curing days

14

28

Table 2 Mix proportions of mortar

Type

W/C

(%)

W

(kg)

C

(kg)

S

(kg)

P.C

(kg)

P.S.R

(wt%)

50-OPC-0

50

173

345

782

-

0

50-OPC-2

170

3.46

2.0

50-OPC-4

166

6.92

4.0

50-OPC-6

163

10.38

6.0

Note: P.C: phytoncide; P.S.R: phytoncide substitution ratio

Table 3 Mix proportions of concrete

Type

W/B

(%)

S/a

(%)

Unit weight (kg/m3)

P.S.R

(wt%)

W

C

BFS

S

G

P.C

40-OPC-0

40

43

170

425

-

721

934

-

0

40-OPC-2

167

3.40

2.0

40-OPC-4

163

6.80

4.0

40-OPC-6

160

10.20

6.0

50-OPC-0

50

45

173

346

-

781

932

-

0

50-OPC-2

170

3.46

2.0

50-OPC-4

166

6.92

4.0

50-OPC-6

163

10.38

6.0

50-BFS-0

50

45

173

242

104

777

928

-

0

50-BFS-2

170

3.46

2.0

50-BFS-4

166

6.92

4.0

50-BFS-6

163

10.38

6.0

Note: P.C: phytoncide; P.S.R: phytoncide substitution ratio

2.2.2 ๊ฒฐํ•ฉ์žฌ ๋ฐ ๊ณจ์žฌ

๋ณธ ์—ฐ๊ตฌ์—์„œ๋Š” ๊ฒฐํ•ฉ์žฌ๋กœ ๋ณดํ†ต ํฌํ‹€๋žœ๋“œ ์‹œ๋ฉ˜ํŠธ(KATS 2016)(5)์™€ ๊ณ ๋กœ์Šฌ๋ž˜๊ทธ(BFS)๋ฅผ ์‚ฌ์šฉํ•˜์˜€์œผ๋ฉฐ, BFS๋Š” ์‹œ๋ฉ˜ํŠธ ์งˆ๋Ÿ‰์˜ 30 %๋ฅผ ๋Œ€์ฒดํ•˜์—ฌ ์‚ฌ์šฉํ•˜์˜€๋‹ค. ๊ฒฐํ•ฉ์žฌ์˜ ๋ฌผ๋ฆฌ์ , ํ™”ํ•™์  ํŠน์„ฑ์„ Table 4์— ๋‚˜ํƒ€๋‚ด์—ˆ๋‹ค. ๊ตต์€ ๊ณจ์žฌ๋Š” ์ตœ๋Œ€ ์น˜์ˆ˜ 25 mm์˜ ์‡„์„์„ ์‚ฌ์šฉํ•˜์˜€์œผ๋ฉฐ, ์ž”๊ณจ์žฌ๋Š” ์ตœ๋Œ€ ์น˜์ˆ˜๊ฐ€ 5 mm์ธ ๋ชจ๋ž˜๋ฅผ ์‚ฌ์šฉํ•˜์˜€๋‹ค. ์‚ฌ์šฉ๋œ ๊ณจ์žฌ์˜ ๋ฌผ๋ฆฌ์  ํŠน์„ฑ์„ Table 5์— ๋‚˜ํƒ€๋‚ด์—ˆ๋‹ค.

Table 4 Physical and chemical properties of the binder

Properties

Cement

BFS

Physical

Specific gravity

3.15

2.89

Fineness (cm2/g)

3,200

4,300

Chemical (%)

SiO2

21.36

33.54

Al2O3

5.03

15.22

Fe2O3

3.31

0.51

CaO

63.18

43.88

MgO

2.89

2.62

SO3

2.30

2.54

LOI

1.40

0.01

Table 5 Physical properties of the aggregate

Type

Density (g/cm3)

Absorption (%)

F.M.

Sand

2.59

1.07

2.65

Gravel

2.54

0.63

6.86

Fig. 2 Mortar flow test

../../Resources/kci/JKCI.2021.33.5.531/fig2.png

Fig. 3 Compressive strength of mortar

../../Resources/kci/JKCI.2021.33.5.531/fig3.png

Fig. 4 Compressive strength and modulus of elasticity

../../Resources/kci/JKCI.2021.33.5.531/fig4.png

2.3 ์‚ฌ์šฉ์žฌ๋ฃŒ

2.3.1 ๊ตณ์ง€ ์•Š์€ ์ฝ˜ํฌ๋ฆฌํŠธ ํŠน์„ฑ(ํ”Œ๋กœ, ์Šฌ๋Ÿผํ”„)

ํ”ผํ†ค์น˜๋“œ๋ฅผ ํ˜ผ์ž…ํ•œ ๊ตณ์ง€ ์•Š์€ ๋ชจ๋ฅดํƒ€๋ฅด์˜ ์‹œ๊ณต์„ฑ์„ ํ‰๊ฐ€ํ•˜๊ธฐ ์œ„ํ•ด ๋ชจ๋ฅดํƒ€๋ฅด ํ”Œ๋กœ๋ฅผ ์ธก์ •ํ•˜์˜€๋‹ค. ํ”Œ๋กœ๋Š” KS L 5105 (KATS 2007)(4) ๊ธฐ์ค€์— ๋”ฐ๋ผ ์‹ค์‹œํ•˜์˜€๋‹ค. ํ”Œ๋กœ ์‹œํ—˜ ์ „๊ฒฝ์„ Fig. 2์— ๋‚˜ํƒ€๋‚ด์—ˆ๋‹ค.

ํ”ผํ†ค์น˜๋“œ๋ฅผ ํ˜ผ์ž…ํ•œ ๊ตณ์ง€ ์•Š์€ ์ฝ˜ํฌ๋ฆฌํŠธ์˜ ์‹œ๊ณต์„ฑ์„ ํ‰๊ฐ€ํ•˜๊ธฐ ์œ„ํ•ด ์Šฌ๋Ÿผํ”„๋ฅผ ์ธก์ •ํ•˜์˜€๋‹ค. ์Šฌ๋Ÿผํ”„๋Š” KS F 2402(KATS 2017a)(5) ๊ธฐ์ค€์— ๋”ฐ๋ผ ์‹ค์‹œํ•˜์˜€๋‹ค.

2.3.2 ์••์ถ•๊ฐ•๋„ ๋ฐ ํƒ„์„ฑ๊ณ„์ˆ˜

๋ชจ๋ฅดํƒ€๋ฅด์˜ ์••์ถ•๊ฐ•๋„๋Š” KS L 5105(KATS 2007)(4) ๊ธฐ์ค€์— ๋”ฐ๋ผ 50ร—50ร—50 mm ํฌ๊ธฐ์˜ ํ๋ธŒ ์‹œํ—˜์ฒด๋ฅผ ์‚ฌ์šฉํ•˜์—ฌ ์ธก์ •ํ•˜์˜€๋‹ค. ํƒˆํ˜• ํ›„ ์‹œํ—˜์ฒด๋ฅผ ๋น„๋‹์†Œ์žฌ๋กœ ๋ฐ€๋ด‰ํ•˜๊ณ  ํ•ญ์˜จํ•ญ์Šต์‹ค(20 ยฐC, RH 60 %)์—์„œ ์žฌ๋ น 14์ผ๊ฐ„ ์–‘์ƒํ•œ ํ›„ ๋งŒ๋Šฅ์žฌ๋ฃŒ ์‹œํ—˜๊ธฐ๋ฅผ ์‚ฌ์šฉํ•˜์—ฌ ์••์ถ•๊ฐ•๋„๋ฅผ ์ธก์ •ํ•˜์˜€๋‹ค. ๊ฒฐ๊ณผ ๊ฐ’์€ ์‹œํ—˜์ฒด 6๊ฐœ์˜ ํ‰๊ท ๊ฐ’์„ ์‚ฌ์šฉํ•˜์˜€๋‹ค. ๋ชจ๋ฅดํƒ€๋ฅด ์••์ถ•๊ฐ•๋„ ์‹œํ—˜ ์ „๊ฒฝ์„ Fig. 3์— ๋‚˜ํƒ€๋‚ด์—ˆ๋‹ค.

์ฝ˜ํฌ๋ฆฌํŠธ์˜ ์••์ถ•๊ฐ•๋„๋Š” KS F 2405(KATS 2017b)(6) ๊ธฐ์ค€์— ๋”ฐ๋ผ โˆ…100ร—200 mm ํฌ๊ธฐ์˜ ์‹ค๋ฆฐ๋” ์‹œํ—˜์ฒด๋ฅผ ์‚ฌ์šฉํ•˜์—ฌ ์ธก์ •ํ•˜์˜€๋‹ค. ํƒˆํ˜• ํ›„ ์‹œํ—˜์ฒด๋ฅผ ๋น„๋‹์†Œ์žฌ๋กœ ๋ฐ€๋ด‰ํ•˜๊ณ  ํ•ญ์˜จํ•ญ์Šต์‹ค(20 ยฐC, RH 60 %)์—์„œ ์žฌ๋ น 28์ผ๊ฐ„ ์–‘์ƒํ•œ ํ›„ ๋งŒ๋Šฅ์žฌ๋ฃŒ ์‹œํ—˜๊ธฐ๋ฅผ ์‚ฌ์šฉํ•˜์—ฌ ์••์ถ•๊ฐ•๋„๋ฅผ ์ธก์ •ํ•˜์˜€๋‹ค. ์ด ๋•Œ, ์„ ํ˜• ๋ณ€์œ„ ์ธก์ •๊ธฐ๋ฅผ ์„ค์น˜ํ•˜๊ณ  ์ฝ˜ํฌ๋ฆฌํŠธ์˜ ๋ณ€ํ˜•๋ฅ ์„ ์ธก์ •ํ•˜์—ฌ ํƒ„์„ฑ๊ณ„์ˆ˜๋ฅผ ์‚ฐ์ •ํ•˜์˜€์œผ๋ฉฐ, ๊ฒฐ๊ณผ ๊ฐ’์€ ์‹œํ—˜์ฒด 3๊ฐœ์˜ ํ‰๊ท  ๊ฐ’์„ ์‚ฌ์šฉํ•˜์˜€๋‹ค. ์ฝ˜ํฌ๋ฆฌํŠธ ์••์ถ•๊ฐ•๋„ ๋ฐ ํƒ„์„ฑ๊ณ„์ˆ˜ ์‹œํ—˜ ์ „๊ฒฝ์„ Fig. 4์— ๋‚˜ํƒ€๋‚ด์—ˆ๋‹ค.

2.3.3 ํผ์•Œ๋ฐํ•˜์ด๋“œ ๋†๋„ ๋ณ€ํ™” ๋ถ„์„

ํ”ผํ†ค์น˜๋“œ๊ฐ€ ํ˜ผ์ž…๋œ ๋ชจ๋ฅดํƒ€๋ฅด ๋ฐ ์ฝ˜ํฌ๋ฆฌํŠธ๋ฅผ KS M 1998 (KATS 2017c)(7) ๊ธฐ์ค€์˜ ๋ฐ์‹œ์ผ€์ดํ„ฐ ๋ฐฉ๋ฒ•์— ๋”ฐ๋ผ ๋ถ„๊ด‘ ๊ด‘๋„๊ณ„(UV-VIS)๋ฅผ ์ด์šฉํ•˜์—ฌ ํผ์•Œ๋ฐํ•˜์ด๋“œ ๋†๋„ ๋ณ€ํ™”๋ฅผ ์ธก์ •ํ•˜์˜€๋‹ค. ๋ณธ ์—ฐ๊ตฌ์—์„œ๋Š” ํผ์•Œ๋ฐํ•˜์ด๋“œ ๋ฐœ์ƒ ๋ฌผ์งˆ๋กœ ๊ณต์—…์šฉ ๋ณธ๋“œ๋ฅผ ์‚ฌ์šฉํ•˜์˜€๋‹ค. ๊ฐ ์‹œํ—˜์ฒด๋Š” ํƒ€์„ค 24์‹œ๊ฐ„ ํ›„์— ํƒˆํ˜•ํ•˜์˜€๊ณ , ํœ˜๋ฐœ์„ฑ์ธ ํ”ผํ†ค์น˜๋“œ๊ฐ€ ์ถฉ๋ถ„ํ•œ ์„ฑ๋Šฅ์„ ๋ฐœํœ˜ํ•  ์ˆ˜ ์žˆ๋„๋ก ํƒˆํ˜• ํ›„๋ถ€ํ„ฐ ์ธก์ •์„ ์‹œ์ž‘ํ•˜์˜€๋‹ค. ํƒˆํ˜• ํ›„ ๋ฐ์‹œ์ผ€์ดํ„ฐ(11ยฑ2L) ์•ˆ์— ์‹œํ—˜์ฒด์™€ ๊ณต์—…์šฉ ๋ณธ๋“œ(15.7 g), ์ฆ๋ฅ˜์ˆ˜๋ฅผ ๋„ฃ๊ณ  ๊ฐ ์ธก์ • ์žฌ๋ น์— ๋„๋‹ฌํ•˜๋ฉด ์ฆ๋ฅ˜์ˆ˜์— ๋…น์•„๋“  ํผ์•Œ๋ฐํ•˜์ด๋“œ ๋†๋„๋ฅผ ์ธก์ •ํ•˜์˜€๋‹ค. ํผ์•Œ๋ฐํ•˜์ด๋“œ ๋†๋„๋Š” ํผ์•Œ๋ฐํ•˜์ด๋“œ ํ‘œ์ค€์šฉ์•ก์„ ์ด์šฉํ•œ ๊ฒ€์ •๊ณก์„ ์˜ ๊ธฐ์šธ๊ธฐ์™€ ์‹œํ—˜์ฒด๋ฅผ ๋„ฃ์ง€ ์•Š์€ ๋ฐ์‹œ์ผ€์ดํ„ฐ์—์„œ์˜ ํผ์•Œ๋ฐํ•˜์ด๋“œ ๋ฐ”ํƒ•์‹œํ—˜ ์šฉ์•ก์˜ ํก๊ด‘๋„๋ฅผ ์ด์šฉํ•˜์—ฌ ์‹ (1)์— ์˜ํ•ด ๊ณ„์‚ฐ๋œ๋‹ค. ๋ฐ์‹œ์ผ€์ดํ„ฐ๋Š” ์‹คํ—˜์ข…๋ฃŒ์‹œ๊นŒ์ง€ ํ•ญ์˜จํ•ญ์Šต์‹ค(20 ยฐC, RH 60 %)์— ๋ณด๊ด€๋˜์—ˆ์œผ๋ฉฐ, ๋ชจ๋ฅดํƒ€๋ฅด๋Š” ์‹คํ—˜ ์‹œ์ž‘ ํ›„ ์žฌ๋ น 14์ผ๊นŒ์ง€, ์ฝ˜ํฌ๋ฆฌํŠธ๋Š” ์žฌ๋ น 28์ผ๊นŒ์ง€ ์ธก์ •ํ•˜์˜€๋‹ค. ๋ฐ์‹œ์ผ€์ดํ„ฐ์˜ ๋ณด๊ด€ ์ „๊ฒฝ๊ณผ ๋ถ„๊ด‘ ๊ด‘๋„๊ณ„(ํŒŒ์žฅ 412 nm)๋ฅผ ์ด์šฉํ•œ ํผ์•Œ๋ฐํ•˜์ด๋“œ ๋†๋„ ์ธก์ • ์ „๊ฒฝ์„ Figs. 5~7์— ๊ฐ๊ฐ ๋‚˜ํƒ€๋‚ด์—ˆ๋‹ค.

Fig. 5 Variation of formaldehyde concentration (desiccator method)

../../Resources/kci/JKCI.2021.33.5.531/fig5.png

Fig. 6 Formaldehyde concentration measurement (UV-VIS)

../../Resources/kci/JKCI.2021.33.5.531/fig6.png

Fig. 7 UV-VIS value of formaldehyde concentration

../../Resources/kci/JKCI.2021.33.5.531/fig7.png

(1)
G=Fร—(Adโˆ’Ab)ร—1,800/S

์—ฌ๊ธฐ์„œ, G๋Š” ์‹œํ—˜ํŽธ์˜ ํผ์•Œ๋ฐํ•˜์ด๋“œ ๋†๋„(mg/L), F๋Š” ํผ์•Œ๋ฐํ•˜์ด๋“œ ํ‘œ์ค€์šฉ์•ก์— ๋Œ€ํ•œ ๊ฒ€์ •๊ณก์„ ์˜ ๊ธฐ์šธ๊ธฐ(mg/L), Ad๋Š” ์‹œํ—˜ํŽธ์„ ๋„ฃ์€ ๋ฐ์‹œ์ผ€์ดํ„ฐ ๋‚ด ์šฉ์•ก์˜ ํก๊ด‘๋„, Ab๋Š” ํผ์•Œ๋ฐํ•˜์ด๋“œ ๋ฐ”ํƒ•์‹œํ—˜ ์šฉ์•ก์˜ ํก๊ด‘๋„, S๋Š” ์‹œํ—˜ํŽธ์˜ ํ‘œ๋ฉด์ (cm2)์ด๋‹ค.

Fig. 8 Results of flow value

../../Resources/kci/JKCI.2021.33.5.531/fig8.png

3. ์‹คํ—˜๊ฒฐ๊ณผ ๋ฐ ๋ถ„์„

3.1 ๋ชจ๋ฅดํƒ€๋ฅด ํŠน์„ฑ

3.1.1 ๋ชจ๋ฅดํƒ€๋ฅด ์‹œ๊ณต์„ฑ

ํ”ผํ†ค์น˜๋“œ์˜ ํ˜ผ์ž…๋ฅ ์— ๋”ฐ๋ฅธ ๋ชจ๋ฅดํƒ€๋ฅด์˜ ํ”Œ๋กœ ๊ฐ’์„ Fig. 8์— ๋‚˜ํƒ€๋‚ด์—ˆ๋‹ค. ์‹คํ—˜๊ฒฐ๊ณผ, ํ”ผํ†ค์น˜๋“œ์˜ ํ˜ผ์ž…๋ฅ ์ด ์ฆ๊ฐ€ํ•˜๋”๋ผ๋„ ํ”Œ๋กœ ๊ฐ’์€ ํ”ผํ†ค์น˜๋“œ๊ฐ€ ํ˜ผ์ž…๋˜์ง€ ์•Š์€ ๊ธฐ์ค€ ๋ฐฐํ•ฉ(Ref.)๊ณผ ํฐ ์ฐจ์ด์—†์ด ์œ ์‚ฌํ•˜๊ฒŒ ๋‚˜ํƒ€๋‚ฌ๋‹ค. ์ด๋Š” ๊ธฐ์กด ์—ฐ๊ตฌ(Kim et al. 2018)(9)์™€ ์œ ์‚ฌํ•œ ๊ฒฐ๊ณผ๋กœ, ํ”ผํ†ค์น˜๋“œ์˜ ํ˜ผ์ž…๋ฅ ๋งŒํผ ๋ฐฐํ•ฉ์ˆ˜๋Ÿ‰์ด ์ค„์–ด๋“ค์—ˆ์ง€๋งŒ, ์•ก์ƒ์ธ ํ”ผํ†ค์น˜๋“œ๊ฐ€ ๋ฐฐํ•ฉ์ˆ˜ ์—ญํ• ์„ ํ•˜์—ฌ ์‹œ๊ณต ์„ฑ๋Šฅ์— ํฐ ์ฐจ์ด๊ฐ€ ์—†์—ˆ๋˜ ๊ฒƒ์œผ๋กœ ํŒ๋‹จ๋œ๋‹ค. ํ”ผํ†ค์น˜๋“œ๋ฅผ 6 %๊นŒ์ง€ ํ˜ผ์ž…ํ•˜์—ฌ๋„ ๋ชจ๋ฅดํƒ€๋ฅด ํ”Œ๋กœ ๊ฐ’์—๋Š” ํฐ ์˜ํ–ฅ์„ ์ฃผ์ง€ ์•Š๋Š” ๊ฒƒ์œผ๋กœ ํŒ๋‹จ๋œ๋‹ค.

3.1.2 ๋ชจ๋ฅดํƒ€๋ฅด ์••์ถ•๊ฐ•๋„

ํ”ผํ†ค์น˜๋“œ๊ฐ€ ํ˜ผ์ž…๋œ ๋ชจ๋ฅดํƒ€๋ฅด์˜ ์žฌ๋ น 14์ผ ์••์ถ•๊ฐ•๋„ ์ธก์ •๊ฒฐ๊ณผ๋ฅผ Fig. 9์— ๋‚˜ํƒ€๋‚ด์—ˆ๋‹ค. ์‹คํ—˜๊ฒฐ๊ณผ, ๋ชจ๋ฅดํƒ€๋ฅด์˜ ์••์ถ•๊ฐ•๋„๋Š” ํ”ผํ†ค์น˜๋“œ ํ˜ผ์ž…๋ฅ ์— ๋”ฐ๋ผ ํฐ ์ฐจ์ด๊ฐ€ ์—†๋Š” ๊ฒƒ์œผ๋กœ ๋‚˜ํƒ€๋‚˜, ๊ธฐ์กด ์—ฐ๊ตฌ(Kim et al. 2018)(9)์™€ ์œ ์‚ฌํ•œ ๊ฒฝํ–ฅ์„ ๋‚˜ํƒ€๋‚ด์—ˆ๋‹ค. ํ”ผํ†ค์น˜๋“œ์˜ ํ˜ผ์ž…์œผ๋กœ ์œ ํšจ ๋ฌผ-์‹œ๋ฉ˜ํŠธ๋น„๊ฐ€ ๊ฐ์†Œํ•˜์—ฌ ์••์ถ•๊ฐ•๋„๊ฐ€ ์ฆ๊ฐ€ํ•  ๊ฒƒ์œผ๋กœ ์˜ˆ์ƒํ•  ์ˆ˜ ์žˆ์ง€๋งŒ, ์•ก์ƒ์˜ ํ”ผํ†ค์น˜๋“œ์— ํฌํ•จ๋œ ์ˆ˜๋ถ„์˜ ์˜ํ–ฅ์œผ๋กœ ์••์ถ•๊ฐ•๋„๊ฐ€ ํฐ ์ฐจ์ด์—†์ด ๋‚˜ํƒ€๋‚œ ๊ฒƒ์œผ๋กœ ํŒ๋‹จ๋œ๋‹ค.

ํ•œํŽธ, ๋‹ค๋ฅธ ๊ธฐ์กด ์—ฐ๊ตฌ(Lee et al. 2016)(13)์—์„œ๋Š” ํ”ผํ†ค์น˜๋“œ์˜ ํ˜ผ์ž…๋ฅ ์ด ์ฆ๊ฐ€ํ• ์ˆ˜๋ก ์••์ถ•๊ฐ•๋„๊ฐ€ ๊ฐ์†Œํ•˜์˜€๋‹ค. ๋ณธ ์—ฐ๊ตฌ์—์„œ๋Š” ๋ฐฐํ•ฉ์ˆ˜๋ฅผ ๋Œ€์ฒดํ•˜์—ฌ ํ”ผํ†ค์น˜๋“œ๋ฅผ ํ˜ผ์ž…ํ•˜์˜€์ง€๋งŒ, Lee et al.(2016)(13)๋Š” ๋ฐฐํ•ฉ์ˆ˜์˜ ๊ฐ์†Œ์—†์ด ์ถ”๊ฐ€๋กœ ํ”ผํ†ค์น˜๋“œ๋ฅผ ํ˜ผ์ž…ํ•˜์˜€๋‹ค. ๋”ฐ๋ผ์„œ ์ถ”๊ฐ€๋œ ํ”ผํ†ค์น˜๋“œ๊ฐ€ ๋ฌผ-์‹œ๋ฉ˜ํŠธ๋น„์— ์˜ํ–ฅ์„ ์ฃผ์–ด ์••์ถ•๊ฐ•๋„๊ฐ€ ๊ฐ์†Œํ•œ ๊ฒƒ์œผ๋กœ ํŒ๋‹จํ•  ์ˆ˜ ์žˆ๋‹ค.

Fig. 9 Results of compressive strength

../../Resources/kci/JKCI.2021.33.5.531/fig9.png

Fig. 10 Variation of formaldehyde concentration (mortar)

../../Resources/kci/JKCI.2021.33.5.531/fig10.png

Table 6 Formaldehyde concentration reduction ratio after 14 days

Type

Age (days)

Reduction ratio (%)

0

3

7

14

0 (Ref.)

0.0

1.6

2.5

2.7

-

2.0 %

0.0

1.2

1.6

1.8

35.7

4.0 %

0.0

0.6

1.0

1.1

58.1

6.0 %

0.0

0.5

0.9

1.0

62.1

3.1.3 ํผ์•Œ๋ฐํ•˜์ด๋“œ ๋†๋„ ๋ณ€ํ™” ๋ถ„์„

ํ”ผํ†ค์น˜๋“œ ํ˜ผ์ž…๋ฅ ์— ๋”ฐ๋ฅธ ํผ์•Œ๋ฐํ•˜์ด๋“œ์˜ ๋†๋„ ๋ณ€ํ™” ๊ณก์„ ์„ Fig. 10์— ๋‚˜ํƒ€๋‚ด์—ˆ๊ณ , ์žฌ๋ น 14์ผ์—์„œ์˜ ํผ์•Œ๋ฐํ•˜์ด๋“œ ๋†๋„ ๊ฐ์†Œ์œจ์„ Table 6์— ๋‚˜ํƒ€๋‚ด์—ˆ๋‹ค. ๊ธฐ์ค€ ๋ฐฐํ•ฉ(Ref.)์˜ ๊ฒฝ์šฐ, ํ”ผํ†ค์น˜๋“œ๋ฅผ ํ˜ผ์ž…ํ•˜์ง€ ์•Š์€ ๋ชจ๋ฅดํƒ€๋ฅด ์‹œํ—˜์ฒด์™€ ๊ณต์—…์šฉ ๋ณธ๋“œ๋ฅผ ๋„ฃ์€ ๋ฐ์‹œ์ผ€์ดํ„ฐ ์•ˆ์˜ ํผ์•Œ๋ฐํ•˜์ด๋“œ ๋†๋„ ๋ณ€ํ™”์ด๋‹ค. ์‹คํ—˜ ๊ฒฐ๊ณผ, ์‹œ๊ฐ„์ด ์ง€๋‚จ์— ๋”ฐ๋ผ ๊ธฐ์ค€ ๋ฐฐํ•ฉ(Ref.)์˜ ํผ์•Œ๋ฐํ•˜์ด๋“œ ๋†๋„๊ฐ€ ๊ธ‰๊ฒฉํžˆ ์ฆ๊ฐ€ํ•˜๋Š” ๊ฒƒ์„ ํ™•์ธํ•  ์ˆ˜ ์žˆ์—ˆ๋‹ค. ๋ฐ˜๋ฉด, ํ”ผํ†ค์น˜๋“œ๊ฐ€ ํ˜ผ์ž…๋œ ๊ฒฝ์šฐ๋Š” ๊ธฐ์ค€ ๋ฐฐํ•ฉ(Ref.)๋ณด๋‹ค ํผ์•Œ๋ฐํ•˜์ด๋“œ ๋†๋„๊ฐ€ ๋งŽ์ด ๊ฐ์†Œํ•˜๋Š” ๊ฒƒ์œผ๋กœ ๋‚˜ํƒ€๋‚ฌ์œผ๋ฉฐ, ํ˜ผ์ž…๋ฅ ์ด ์ฆ๊ฐ€ํ• ์ˆ˜๋ก ๋†๋„ ๊ฐ์†Œ์œจ์ด ์ฆ๊ฐ€ํ•˜๋Š” ๊ฒฝํ–ฅ์„ ๋‚˜ํƒ€๋‚ด์—ˆ๋‹ค. ํ”ผํ†ค์น˜๋“œ์— ์˜ํ•œ ์œ ํ•ด๋ฌผ์งˆ์˜ ์ œ๊ฑฐ ํšจ๊ณผ๋Š” ๋ชจ๋ฅดํƒ€๋ฅด์— ํ˜ผ์ž…์‹œ์—๋„ ์œ ์ง€๋˜๋Š” ๊ฒƒ์œผ๋กœ ํŒ๋‹จ๋œ๋‹ค. ํ•œํŽธ, ํ”ผํ†ค์น˜๋“œ ํ˜ผ์ž…๋ฅ  4~6 %๋Š” ๊ธฐ์ค€ ๋ฐฐํ•ฉ(Ref.) ๋Œ€๋น„ ๋†๋„ ๊ฐ์†Œ์œจ์ด 58.1~62.1 %๋กœ ํฌ๊ฒŒ ๋‚˜ํƒ€๋‚ฌ์œผ๋ฉฐ, ํ˜ผ์ž…๋ฅ  2 %์—์„œ์˜ ๋†๋„ ๊ฐ์†Œ์œจ 35.7 %์™€ ํฐ ์ฐจ์ด๊ฐ€ ์žˆ์—ˆ๋‹ค. ๋”ฐ๋ผ์„œ ํผ์•Œ๋ฐํ•˜์ด๋“œ๋ฅผ ํšจ์œจ์ ์œผ๋กœ ์ œ๊ฑฐํ•˜๊ธฐ ์œ„ํ•ด์„œ๋Š” ํ”ผํ†ค์น˜๋“œ๋ฅผ 4 % ์ด์ƒ ํ˜ผ์ž…ํ•˜์—ฌ์•ผ ํ•˜๋Š” ๊ฒƒ์œผ๋กœ ํŒ๋‹จ๋œ๋‹ค.

3.2 ์ฝ˜ํฌ๋ฆฌํŠธ ํŠน์„ฑ

3.2.1 ์ฝ˜ํฌ๋ฆฌํŠธ ์Šฌ๋Ÿผํ”„

ํ”ผํ†ค์น˜๋“œ๊ฐ€ ํ˜ผ์ž…๋œ ์ฝ˜ํฌ๋ฆฌํŠธ์˜ ์Šฌ๋Ÿผํ”„ ์ธก์ •๊ฒฐ๊ณผ๋ฅผ Fig. 11์— ๋‚˜ํƒ€๋‚ด์—ˆ๋‹ค. ์‹คํ—˜ ๊ฒฐ๊ณผ, ๋ฌผ-๊ฒฐํ•ฉ์žฌ ๋น„๊ฐ€ ์ฆ๊ฐ€ํ• ์ˆ˜๋ก ์Šฌ๋Ÿผํ”„๋Š” ๋†’๊ฒŒ ๋‚˜ํƒ€๋‚˜ ์ผ๋ฐ˜์ ์ธ ์ฝ˜ํฌ๋ฆฌํŠธ์˜ ๊ฒฝํ–ฅ๊ณผ ์ผ์น˜ํ•˜๋Š” ๊ฒƒ์œผ๋กœ ๋‚˜ํƒ€๋‚ฌ๋‹ค. ํ•œํŽธ, ํ”ผํ†ค์น˜๋“œ์˜ ํ˜ผ์ž…๋ฅ ์ด ์ฆ๊ฐ€ํ• ์ˆ˜๋ก ์Šฌ๋Ÿผํ”„๊ฐ€ ๋‹ค์†Œ ์ฆ๊ฐ€ํ•˜๋Š” ๊ฒฝํ–ฅ์„ ๋‚˜ํƒ€๋ƒˆ๋‹ค. ์ด๋Š” ์•ก์ƒ์˜ ํ”ผํ†ค์น˜๋“œ๊ฐ€ ์Šฌ๋Ÿผํ”„์— ์˜ํ–ฅ์„ ์ค€ ๊ฒƒ์œผ๋กœ ํŒ๋‹จ๋˜๋ฉฐ, ํ”ผํ†ค์น˜๋“œ์˜ ํ˜ผ์ž…์€ ์ฝ˜ํฌ๋ฆฌํŠธ์˜ ์‹œ๊ณต์„ฑ์— ๊ธ์ •์ ์ธ ์˜ํ–ฅ์„ ์ฃผ๋Š” ๊ฒƒ์œผ๋กœ ํŒ๋‹จ๋œ๋‹ค.

Fig. 11 Results of slump test

../../Resources/kci/JKCI.2021.33.5.531/fig11.png

3.2.2 ์ฝ˜ํฌ๋ฆฌํŠธ ์••์ถ•๊ฐ•๋„ ๋ฐ ํƒ„์„ฑ๊ณ„์ˆ˜

ํ”ผํ†ค์น˜๋“œ๊ฐ€ ํ˜ผ์ž…๋œ ์ฝ˜ํฌ๋ฆฌํŠธ์˜ ์žฌ๋ น 28์ผ ์••์ถ•๊ฐ•๋„ ์ธก์ •๊ฒฐ๊ณผ๋ฅผ Fig. 12์— ๋‚˜ํƒ€๋‚ด์—ˆ๋‹ค. ์‹คํ—˜ ๊ฒฐ๊ณผ, ๋ฌผ-๊ฒฐํ•ฉ์žฌ ๋น„๊ฐ€ ์ฆ๊ฐ€ํ• ์ˆ˜๋ก ์••์ถ•๊ฐ•๋„๊ฐ€ ๋‚ฎ์•„์ง€๋Š” ์ผ๋ฐ˜์ ์ธ ๊ฒฝํ–ฅ์„ ๋‚˜ํƒ€๋ƒˆ์œผ๋ฉฐ, BFS๋ฅผ ์‚ฌ์šฉํ•  ๊ฒฝ์šฐ ์••์ถ•๊ฐ•๋„๊ฐ€ ์ฆ๊ฐ€ํ•˜๋Š” ๊ฒฝํ–ฅ์„ ๋‚˜ํƒ€๋ƒˆ๋‹ค. ์ƒ๋Œ€์ ์œผ๋กœ ๋ถ„๋ง๋„๊ฐ€ ๋†’์€ BFS๊ฐ€ ํฌ์กธ๋ž€ ๋ฐ˜์‘์ด ๋น ๋ฅด๊ณ  ์ˆ˜ํ™”๋ฌผ ์‚ฌ์ด์˜ ๊ณต๊ทน์„ ์ฑ„์›Œ์ฃผ๋Š” ๋“ฑ ๊ฐ•๋„๋ฐœํ˜„์ด ์šฐ์ˆ˜ํ•˜์—ฌ ์••์ถ•๊ฐ•๋„๊ฐ€ ์ฆ๊ฐ€ํ•œ ๊ฒƒ์œผ๋กœ ํŒ๋‹จ๋œ๋‹ค. ๋˜ํ•œ, ํ”ผํ†ค์น˜๋“œ๋ฅผ 2 % ์ด์ƒ ํ˜ผ์ž…ํ•˜๋ฉด, ํ˜ผ์ž…๋ฅ ์ด ์ฆ๊ฐ€ํ• ์ˆ˜๋ก ์••์ถ•๊ฐ•๋„๊ฐ€ ์ฆ๊ฐ€ํ•˜๋Š” ๊ฒฝํ–ฅ์„ ๋‚˜ํƒ€๋ƒˆ์œผ๋ฉฐ, 4 % ์ด์ƒ ํ˜ผ์ž…์‹œ ๊ธฐ์ค€ ๋ฐฐํ•ฉ(Ref.)๋ณด๋‹ค ๊ฐ•๋„๊ฐ€ ์ฆ๊ฐ€ํ•˜๋Š” ๊ฒƒ์œผ๋กœ ๋‚˜ํƒ€๋‚ฌ๋‹ค. ์ฝ˜ํฌ๋ฆฌํŠธ์˜ ์••์ถ•๊ฐ•๋„๋Š” ๋ชจ๋ฅดํƒ€๋ฅด์˜ ์••์ถ•๊ฐ•๋„์™€ ๋‹ค๋ฅธ ๊ฒฝํ–ฅ์„ ๋‚˜ํƒ€๋ƒˆ๋Š”๋ฐ, ์ด๋Š” ํ”ผํ†ค์น˜๋“œ์˜ ์„ฑ๋ถ„๊ณผ ๊ตต์€ ๊ณจ์žฌ๊ฐ€ ์‹œ๊ณต์„ฑ์— ์˜ํ–ฅ์„ ์ฃผ๊ณ  ๊ฐœ์„ ๋œ ์‹œ๊ณต์„ฑ๊ณผ ์œ ํšจ ๋ฌผ-์‹œ๋ฉ˜ํŠธ๋น„์— ์••์ถ•๊ฐ•๋„๊ฐ€ ์˜ํ–ฅ์„ ๋ฐ›์€ ๊ฒƒ์œผ๋กœ ํŒ๋‹จ๋œ๋‹ค. ๋”ฐ๋ผ์„œ ํ”ผํ†ค์น˜๋“œ๋ฅผ 4 % ์ด์ƒ ํ˜ผ์ž…ํ•˜๋ฉด ์ฝ˜ํฌ๋ฆฌํŠธ์˜ ์••์ถ•๊ฐ•๋„ ๊ฐœ์„ ์— ํšจ๊ณผ๊ฐ€ ์žˆ๋Š” ๊ฒƒ์œผ๋กœ ํŒ๋‹จ๋œ๋‹ค.

ํ”ผํ†ค์น˜๋“œ๊ฐ€ ํ˜ผ์ž…๋œ ์ฝ˜ํฌ๋ฆฌํŠธ์˜ ํƒ„์„ฑ๊ณ„์ˆ˜ ์ธก์ •๊ฒฐ๊ณผ๋ฅผ Fig. 13์— ๋‚˜ํƒ€๋‚ด์—ˆ๋‹ค. ์‹คํ—˜ ๊ฒฐ๊ณผ, ํƒ„์„ฑ๊ณ„์ˆ˜๋Š” ์••์ถ•๊ฐ•๋„์™€ ์œ ์‚ฌํ•œ ๊ฒฝํ–ฅ์„ ๋‚˜ํƒ€๋ƒˆ์œผ๋ฉฐ, ํ”ผํ†ค์น˜๋“œ์˜ ํ˜ผ์ž…๋ฅ ์— ๋”ฐ๋ผ ํฐ ์ฐจ์ด๋ฅผ ๋ณด์ด์ง€ ์•Š์•˜๋‹ค. ํƒ„์„ฑ๊ณ„์ˆ˜๋Š” ์ผ๋ฐ˜์ ์œผ๋กœ ์••์ถ•๊ฐ•๋„์™€ ์œ ์‚ฌํ•œ ๊ฒฝํ–ฅ์„ ๋‚˜ํƒ€๋‚ด๋Š” ๊ฒƒ์ด ๋Œ€๋ถ€๋ถ„์ด๊ณ , ๋ณธ ์—ฐ๊ตฌ์—์„œ๋„ ์ด์™€ ๊ฐ™์€ ๊ฒฝํ–ฅ์„ ๋‚˜ํƒ€๋ƒˆ๋‹ค. ๋”ฐ๋ผ์„œ ํ”ผํ†ค์น˜๋“œ์˜ ํ˜ผ์ž…์€ ์ฝ˜ํฌ๋ฆฌํŠธ์˜ ํƒ„์„ฑ๊ณ„์ˆ˜์— ํฐ ์˜ํ–ฅ์„ ์ฃผ์ง€ ์•Š๋Š” ๊ฒƒ์œผ๋กœ ํŒ๋‹จ๋œ๋‹ค.

Fig. 12 Results of compressive strength

../../Resources/kci/JKCI.2021.33.5.531/fig12.png

Fig. 13 Results of modulus of elasticity

../../Resources/kci/JKCI.2021.33.5.531/fig13.png

Fig. 14 Variation of formaldehyde concentration (concrete)

../../Resources/kci/JKCI.2021.33.5.531/fig14-1.png

../../Resources/kci/JKCI.2021.33.5.531/fig14-2.png

3.2.3 ํผ์•Œ๋ฐํ•˜์ด๋“œ ๋†๋„ ๋ณ€ํ™” ๋ถ„์„

ํ”ผํ†ค์น˜๋“œ๊ฐ€ ํ˜ผ์ž…๋œ ์ฝ˜ํฌ๋ฆฌํŠธ์— ์˜ํ•œ ํผ์•Œ๋ฐํ•˜์ด๋“œ ๋†๋„ ๋ณ€ํ™” ๊ณก์„ ์„ ํ”ผํ†ค์น˜๋“œ ํ˜ผ์ž…๋ฅ ์— ๋”ฐ๋ผ Fig. 14์— ๋‚˜ํƒ€๋‚ด์—ˆ๊ณ , ์žฌ๋ น 28์ผ์—์„œ์˜ ํผ์•Œ๋ฐํ•˜์ด๋“œ ๋†๋„ ๊ฐ์†Œ์œจ์„ Table 7์— ๋‚˜ํƒ€๋‚ด์—ˆ๋‹ค. ๊ธฐ์ค€ ๋ฐฐํ•ฉ(Ref.)์˜ ๊ฒฝ์šฐ, ํ”ผํ†ค์น˜๋“œ๋ฅผ ํ˜ผ์ž…ํ•˜์ง€ ์•Š์€ ์ฝ˜ํฌ๋ฆฌํŠธ ์‹œํ—˜์ฒด์™€ ๊ณต์—…์šฉ ๋ณธ๋“œ๋ฅผ ๋„ฃ์€ ๋ฐ์‹œ์ผ€์ดํ„ฐ ์•ˆ์˜ ํผ์•Œ๋ฐํ•˜์ด๋“œ ๋†๋„ ๋ณ€ํ™”์ด๋‹ค. ์‹คํ—˜ ๊ฒฐ๊ณผ, ๊ธฐ์ค€ ๋ฐฐํ•ฉ(Ref.)๊ณผ ํ”ผํ†ค์น˜๋“œ ํ˜ผ์ž…๋ฅ  2 %์—์„œ์˜ ํผ์•Œ๋ฐํ•˜์ด๋“œ ๋†๋„๋Š” ์žฌ๋ น 8์ผ๊นŒ์ง€ ๊ธ‰๊ฒฉํžˆ ์ฆ๊ฐ€ํ•˜๋‹ค๊ฐ€ ์ดํ›„์— ์™„๋งŒํ•ด์ง€๋Š” ๊ฒฝํ–ฅ์„ ๋‚˜ํƒ€๋‚ด์—ˆ๋‹ค. ์ด๋Š” ํผ์•Œ๋ฐํ•˜์ด๋“œ ๋ฐœ์ƒ ๋ฌผ์งˆ๋กœ ์‚ฌ์šฉ๋œ ๊ณต์—…์šฉ ๋ณธ๋“œ์˜ ์œ ํ•ด๋ฌผ์งˆ ๋ฐฉ์ถœ๋Ÿ‰์— ์˜ํ•œ ์˜ํ–ฅ์ธ ๊ฒƒ์œผ๋กœ ํŒ๋‹จ๋œ๋‹ค. ๊ทธ๋Ÿฌ๋‚˜ ํ”ผํ†ค์น˜๋“œ๊ฐ€ 4 % ์ด์ƒ ํ˜ผ์ž…๋˜๋ฉด ํผ์•Œ๋ฐํ•˜์ด๋“œ์˜ ๋†๋„๋Š” ์žฌ๋ น 8์ผ๊นŒ์ง€ ์™„๋งŒํ•˜๊ฒŒ ์ฆ๊ฐ€ํ•˜๋Š” ๊ฒฝํ–ฅ์„ ๋‚˜ํƒ€๋‚ด์—ˆ๋‹ค. ํ”ผํ†ค์น˜๋“œ์— ์˜ํ•œ ์œ ํ•ด๋ฌผ์งˆ์˜ ์ œ๊ฑฐ ํšจ๊ณผ๋Š” ์ฝ˜ํฌ๋ฆฌํŠธ์— ํ˜ผ์ž…์‹œ์—๋„ ์œ ์ง€๋˜๋Š” ๊ฒƒ์œผ๋กœ ํŒ๋‹จ๋˜๋ฉฐ, ํ”ผํ†ค์น˜๋“œ๊ฐ€ ์ดˆ๊ธฐ์— ํผ์•Œ๋ฐํ•˜์ด๋“œ๋ฅผ ์ œ๊ฑฐํ•˜์—ฌ ๋†๋„๊ฐ€ ๋‚ฎ์€ ์ˆ˜์ค€์„ ์œ ์ง€ํ•  ์ˆ˜ ์žˆ๋Š” ๊ฒƒ์œผ๋กœ ํŒ๋‹จ๋œ๋‹ค. ๋˜ํ•œ, ํ”ผํ†ค์น˜๋“œ ํ˜ผ์ž…๋ฅ  4~6 %๋Š” ๊ธฐ์ค€ ๋ฐฐํ•ฉ(Ref.) ๋Œ€๋น„ ๋†๋„ ๊ฐ์†Œ์œจ์ด ํ‰๊ท  65.4~77.5 %๋กœ ํฌ๊ฒŒ ๋‚˜ํƒ€๋‚ฌ์œผ๋ฉฐ, ํ˜ผ์ž…๋ฅ  2 %์˜ ๊ฒฝ์šฐ 21.4 %์™€ ํฐ ์ฐจ์ด๊ฐ€ ์žˆ์—ˆ๋‹ค. ๋”ฐ๋ผ์„œ ํผ์•Œ๋ฐํ•˜์ด๋“œ๋ฅผ ํšจ์œจ์ ์œผ๋กœ ์ œ๊ฑฐํ•˜๊ธฐ ์œ„ํ•ด์„œ๋Š” ํ”ผํ†ค์น˜๋“œ๋ฅผ 4 % ์ด์ƒ ํ˜ผ์ž…ํ•˜์—ฌ์•ผ ํ•˜๋Š” ๊ฒƒ์œผ๋กœ ํŒ๋‹จ๋œ๋‹ค.

Table 7 Formaldehyde concentration reduction ratio after 28 days

Type

40-OPC

50-OPC

50-BFS

Average

Reduction ratio (%)

0 (Ref.)

6.3

5.9

6.0

6.1

-

2.0 %

5.2

4.5

4.6

4.8

21.4

4.0 %

2.2

1.9

2.2

2.1

65.4

6.0 %

1.6

1.2

1.3

1.4

77.5

ํ•œํŽธ, ๋ฌผ-๊ฒฐํ•ฉ์žฌ ๋น„์— ๋”ฐ๋ฅธ ํผ์•Œ๋ฐํ•˜์ด๋“œ์˜ ๋†๋„ ๋ณ€ํ™”๋Š” ์ €๊ฐ•๋„ ์ฝ˜ํฌ๋ฆฌํŠธ์ผ์ˆ˜๋ก ๋†๋„๊ฐ€ ๋‚ฎ์€ ๊ฒฝํ–ฅ(50OPC<50BFS< 40OPC)์„ ๋‚˜ํƒ€๋ƒˆ์œผ๋‚˜, ๊ทธ ์ฐจ์ด๋Š” ํฌ์ง€ ์•Š์•˜๋‹ค. ๋†’์€ ์••์ถ•๊ฐ•๋„์— ์˜ํ•œ ์ฝ˜ํฌ๋ฆฌํŠธ์˜ ์ˆ˜๋ฐ€์„ฑ์ด ํ”ผํ†ค์น˜๋“œ์˜ ๋ฐฉ์ถœ์— ์˜ํ–ฅ์„ ์ค€ ๊ฒƒ์œผ๋กœ ํŒ๋‹จ๋œ๋‹ค. ๋”ฐ๋ผ์„œ ํ”ผํ†ค์น˜๋“œ๋Š” ์ €๊ฐ•๋„ ๋ฐ ๊ณ ๊ฐ•๋„ ์ฝ˜ํฌ๋ฆฌํŠธ์— ๋ชจ๋‘ ์ ์šฉํ•  ์ˆ˜ ์žˆ์œผ๋ฉฐ, ์••์ถ•๊ฐ•๋„๊ฐ€ ํผ์•Œ๋ฐํ•˜์ด๋“œ์˜ ๋†๋„ ๋ณ€ํ™”์— ๋ฏธ์น˜๋Š” ์˜ํ–ฅ์€ ํฌ์ง€ ์•Š์„ ๊ฒƒ์œผ๋กœ ํŒ๋‹จ๋œ๋‹ค.

4. ๊ฒฐ ๋ก 

ํ”ผํ†ค์น˜๋“œ๋ฅผ ํ˜ผ์ž…ํ•œ ๋ชจ๋ฅดํƒ€๋ฅด ๋ฐ ์ฝ˜ํฌ๋ฆฌํŠธ๋ฅผ ์ œ์ž‘ํ•˜์˜€์œผ๋ฉฐ, ์ด์— ๋”ฐ๋ฅธ ๊ธฐ์ดˆ ๋ฌผ์„ฑ ๋ฐ ํผ์•Œ๋ฐํ•˜์ด๋“œ ์ €๊ฐ ํšจ๊ณผ๋ฅผ ํ‰๊ฐ€ํ•œ ๊ฒฐ๊ณผ๋Š” ๋‹ค์Œ๊ณผ ๊ฐ™๋‹ค.

1) ํ”ผํ†ค์น˜๋“œ๋ฅผ 6 %๊นŒ์ง€ ํ˜ผ์ž…ํ•˜์—ฌ๋„ ๋ชจ๋ฅดํƒ€๋ฅด์˜ ํ”Œ๋กœ ๊ฐ’์€ ํฐ ๋ณ€ํ™”๊ฐ€ ์—†์—ˆ์œผ๋ฉฐ, ์ฝ˜ํฌ๋ฆฌํŠธ์˜ ์Šฌ๋Ÿผํ”„๋Š” ๋‹ค์†Œ ์ฆ๊ฐ€ํ•˜๋Š” ๊ฒฝํ–ฅ์„ ๋‚˜ํƒ€๋ƒˆ๋‹ค. ์•ก์ƒ์ธ ํ”ผํ†ค์น˜๋“œ๊ฐ€ ๋ฐฐํ•ฉ์ˆ˜์˜ ์—ญํ• ์„ ํ•œ ๊ฒƒ์œผ๋กœ ํŒ๋‹จ๋˜๋ฉฐ, ํ”ผํ†ค์น˜๋“œ์˜ ํ˜ผ์ž…์€ ์‹œ๊ณต์„ฑ์— ์•…์˜ํ–ฅ์„ ์ฃผ์ง€ ์•Š๋Š” ๊ฒƒ์œผ๋กœ ํŒ๋‹จ๋œ๋‹ค.

2) ํ”ผํ†ค์น˜๋“œ๋ฅผ ํ˜ผ์ž…ํ•œ ๋ชจ๋ฅดํƒ€๋ฅด์˜ ์••์ถ•๊ฐ•๋„๋Š” ํ˜ผ์ž…๋ฅ ์— ๋”ฐ๋ผ ํฐ ์ฐจ์ด๊ฐ€ ์—†์—ˆ์œผ๋‚˜, ์ฝ˜ํฌ๋ฆฌํŠธ๋Š” ํ”ผํ†ค์น˜๋“œ ํ˜ผ์ž…๋ฅ ์ด ์ฆ๊ฐ€ํ• ์ˆ˜๋ก ์••์ถ•๊ฐ•๋„๊ฐ€ ์ฆ๊ฐ€ํ•˜๋Š” ๊ฒฝํ–ฅ์„ ๋‚˜ํƒ€๋ƒˆ๋‹ค. ํ”ผํ†ค์น˜๋“œ์˜ ํ˜ผ์ž…์œผ๋กœ ์ธํ•œ ์‹œ๊ณต์„ฑ์˜ ๊ฐœ์„ ๊ณผ ์œ ํšจ ๋ฌผ-๊ฒฐํ•ฉ์žฌ ๋น„์˜ ์˜ํ–ฅ์œผ๋กœ ์ฝ˜ํฌ๋ฆฌํŠธ์˜ ์••์ถ•๊ฐ•๋„๊ฐ€ ์ฆ๊ฐ€ํ•œ ๊ฒƒ์œผ๋กœ ํŒ๋‹จ๋œ๋‹ค.

3) ํ”ผํ†ค์น˜๋“œ ํ˜ผ์ž…๋ฅ ์ด ์ฆ๊ฐ€ํ• ์ˆ˜๋ก ํผ์•Œ๋ฐํ•˜์ด๋“œ์˜ ๋†๋„ ๊ฐ์†Œ์œจ์ด ์ฆ๊ฐ€ํ•˜๋Š” ๊ฒฝํ–ฅ์„ ๋‚˜ํƒ€๋ƒˆ์œผ๋ฉฐ, 4 % ์ด์ƒ ํ˜ผ์ž… ์‹œ ๋†๋„ ๊ฐ์†Œ์œจ์ด ๊ธฐ์ค€ ๋ฐฐํ•ฉ(Ref.) ๋Œ€๋น„ ๋ชจ๋ฅดํƒ€๋ฅด๋Š” 58.1 %, ์ฝ˜ํฌ๋ฆฌํŠธ๋Š” 65.4 %๋กœ ํฌ๊ฒŒ ๋‚˜ํƒ€๋‚ฌ๋‹ค. ํ”ผํ†ค์น˜๋“œ์˜ ์œ ํ•ด๋ฌผ์งˆ ์ œ๊ฑฐ ํšจ๊ณผ๋Š” ๋ชจ๋ฅดํƒ€๋ฅด๋‚˜ ์ฝ˜ํฌ๋ฆฌํŠธ์— ๋ฐฐํ•ฉ์‹œ์—๋„ ์œ ์ง€๋˜๋Š” ๊ฒƒ์œผ๋กœ ํŒ๋‹จ๋œ๋‹ค.

4) ๋ชจ๋ฅดํƒ€๋ฅด ๋ฐ ์ฝ˜ํฌ๋ฆฌํŠธ์˜ ์‹œ๊ณต์„ฑ, ์••์ถ•๊ฐ•๋„, ํผ์•Œ๋ฐํ•˜์ด๋“œ ๋†๋„ ๋ณ€ํ™”๋ฅผ ๋ถ„์„ํ•œ ๊ฒฐ๊ณผ, ์ตœ์ ์˜ ํ˜ผ์ž…๋ฅ ์€ 4 %์ธ ๊ฒƒ์œผ๋กœ ํŒ๋‹จ๋œ๋‹ค. ์ ์ • ์ˆ˜์ค€์˜ ํ”ผํ†ค์น˜๋“œ ํ˜ผ์ž…์€ ์‹œ๊ณต์„ฑ ๋ฐ ์••์ถ•๊ฐ•๋„์— ์•…์˜ํ–ฅ์„ ์ฃผ์ง€ ์•Š๊ณ  ํผ์•Œ๋ฐํ•˜์ด๋“œ ์ €๊ฐ์— ํšจ๊ณผ์ ์ž„์„ ํ™•์ธํ•  ์ˆ˜ ์žˆ์—ˆ๋‹ค.

๋ณธ ์—ฐ๊ตฌ์—์„œ ํ”ผํ†ค์น˜๋“œ๋ฅผ ํ˜ผ์ž…ํ•œ ์ฝ˜ํฌ๋ฆฌํŠธ(๋ชจ๋ฅดํƒ€๋ฅด)์˜ ๊ธฐ์ดˆ ๋ฌผ์„ฑ๊ณผ ํผ์•Œ๋ฐํ•˜์ด๋“œ ๋†๋„๋ฅผ ์ธก์ •ํ•œ ๊ฒฐ๊ณผ, ํ”ผํ†ค์น˜๋“œ๋Š” ์‹œ๊ณต์„ฑ, ๊ฐ•๋„ ๋ฐ ํผ์•Œ๋ฐํ•˜์ด๋“œ ์ €๊ฐ์— ํšจ๊ณผ๊ฐ€ ์žˆ์Œ์„ ํ™•์ธํ•˜์˜€๋‹ค. ๋‹ค๋งŒ, ์ฝ˜ํฌ๋ฆฌํŠธ ๊ฐ•๋„๋ฐœํ˜„ ๋“ฑ ์‹ค์ œ ํ™˜๊ฒฝ ์กฐ๊ฑด๊ณผ ๋‹ค๋ฅธ ์กฐ๊ฑด์—์„œ ์ˆ˜ํ–‰๋˜์—ˆ์œผ๋ฏ€๋กœ ํ”ผํ†ค์น˜๋“œ์˜ ์‚ฌ์šฉ์€ ์ถฉ๋ถ„ํ•œ ๊ฒ€ํ†  ํ›„ ์ด๋ฃจ์–ด์ ธ์•ผ ํ•œ๋‹ค. ์ถ”ํ›„ ์‹ค์ œ ํ™˜๊ฒฝ๊ณผ ์œ ์‚ฌํ•œ ์กฐ๊ฑด์—์„œ์˜ ์—ฐ๊ตฌ๊ฐ€ ํ•„์š”ํ•˜๊ณ , ํ”ผํ†ค์น˜๋“œ ์˜ํ–ฅ์˜ ์ง€์†์‹œ๊ฐ„์— ๊ด€ํ•œ ์—ฐ๊ตฌ๋„ ๋˜ํ•œ ํ•„์š”ํ•œ ๊ฒƒ์œผ๋กœ ํŒ๋‹จ๋œ๋‹ค.

๊ฐ์‚ฌ์˜ ๊ธ€

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