급랭 진로슬래그 모르타르 골재 재활용 특성

김태희; 박경봉; Tae Heui Kim; Kyung Bong Park

Clean Technology, Vol.12, No.4, 238-243, December, 2006

Export Citation

급랭 진로슬래그 모르타르 골재 재활용 특성

Recycling of Chilled Converter Slag as Aggregate in Cement Mortar

김태희^†, 박경봉

안동대학교 공과대학 신소재공학부, 760-749 경상북도 안동시 송천동 388

Tae Heui Kim^†, and Kyung Bong Park

School of Materials Science and Engineering, Andong National University, 388 Songcheon-dong, Andong, Gyeongbuk 760-749, Korea

E-mail:

초록

본 연구에서는 용융 전로슬래그를 고속의 공기를 이용하여 급랭한 전로슬래그의 골제 특성을 조사하고 이를 잔골재로 재활용한 모르타르의 특성을 분석하였다. 급랭전로슬래그의 입자형태는 구형이었으며 냉각 속도의 차이로 인해 표면층과 내부층 그리고 외부와 연결된 공동을 가지고 있었다. 표준사를 구형 급랭전로슬래그로 대체한 혼합 잔골재의 특성을 분석한 결과 대체 비율이 증가하면서 비중, 단위용적중량 그리고 조립율이 증가하였으며 실적률은 대체 비율 75%에서 최대를 나타내었다. 흡수율은 대체 비율 50%에서 최소값을 보였다. 혼합 잔골재의 구형 급랭전로슬래그 대체 비율이 증가할수록 굳지 않은 모르타르의 유동성이 증가하여 동일한 플로우값을 얻기 위한 물/시멘트 비는 감소 하였다. 구형 급랭전로슬래그 대체 비율이 증가할수록 양생한 모르타르 시편의 조직은 치밀하였으며 비중은 증가하였다. 압축강도의 경우는 대체율 75%에서 최대값을 보였다.

The aggregate properties of chilled onverter slag reformed by atomizing liquid converter slag were investigated. The properties of mortars with various replacement of standard sand by chilled converter slag as recycled fine aggregates were investigated. The particle shape of chilled converter slag by atomizing was a sphere with an open cavity which is enclosed with two layers like a bored coconut. Specific gravity, unit weight and fineness modulus increased with increasing the replacement, and solid content had the maximum at the replacement of 75% and water aborption rate had the minimum at the replacement. The hardened mortars with higher replacements have the higher specific gravity and the denser texture.

Keywords:전로슬래그;잔골재;모르타르

[References]

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Kim EH, Cho JK, Yim S, Chemosphere, 59, 387 (2005)
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Kim TH, Park KB, Clean Technol., 6(2), 85 (2000)
Ko IY, Jin BS, Kim YW, J. Korean Inst. Resour. Recy, 12, 23 (2003)
Shih PH, Wu ZZ, Chiang HL, Waste Manage., 24, 1043 (2004)
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Kang SG, Lee WJ, Hwang ID, Park S, Chung YJ, J. Korean Ceram. Soc., 42(2), 99 (2005)

[1] Dunster A, BRE Information Paper, 18, 1 (2001)

[2] Robinson HL, "The Utilization of Blastfurnace and Steel Making Slags as Aggregates for Construction," in by Scott, P. W., and Bristow, C. M., ed., Geology of industrial Minerals; Industrial Minerals and Extractive Industry Geology, The Geological Society of London, London, 2002, pp.327-330 (2002)

[3] Holliday KA, "Steel Slag; The Industrial Aggregate," Steel Technology International 1997-1998, 58-62 (1997)

[4] Das B, Prakash S, Reddy PSR, Misra VN, Resour. Conserv. Recycl., in press (2006)

[5] Oritz M, Pires AF, Bressiani JC, Waste Manage., 21, 631 (2001)

[6] Kim EH, Cho JK, Yim S, Chemosphere, 59, 387 (2005)

[7] Lopez FA, Balcazar N, Formoso A, Pinto M, Rodriguez M, Waste Manage. Res., 13, 555 (1995)

[8] Kim TH, Park KB, Clean Technol., 6(2), 85 (2000)

[9] Ko IY, Jin BS, Kim YW, J. Korean Inst. Resour. Recy, 12, 23 (2003)

[10] Shih PH, Wu ZZ, Chiang HL, Waste Manage., 24, 1043 (2004)

[11] Lee SH, Hwang HJ, Kwon SK, J. Korean Ceram. Soc., 43(7), 408 (2006)

[12] POSCO, Sustainability Report 2005, 50-55 (2006)

[13] Ko IY, Meadowcroft TR, J. Korean Inst. Resour. Recy., 9(1), 52 (2000)

[14] Oh OS, "Slag Reycling Technology by Blowing Method," korea Patent No. 1999-0011999 (1999)

[15] Kim JM, Cho SH, Kwon KJ, Kim MH, J. Arch. Inst. Korea, 21(3), 121 (2005)

[16] Kang SG, Lee WJ, Hwang ID, Park S, Chung YJ, J. Korean Ceram. Soc., 42(2), 99 (2005)