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커들란을 이용한 콘크리트의 유동성 및 강도증가에 관한 연구

An Experimental Study on the Enhancement of Fluidity and Strength of Concrete with Curdlan

신성의 이중헌^† 이기형¹

Sung Euy Shin Jung Heon Lee^† Ki-Hyeong Rhee¹

조선대학교 화학공학과, 광주 501-759 ¹공주대학교 생물학과, 공주 314-701

Department of Chemical Engineering, Chosun University, Gwangju 501-759, Korea ¹Department of Biological Science, Kongju National University, Kongju 314-701, Korea

leejh@mail.chosun.ac.kr

HWAHAK KONGHAK, June 2002, 40(3), 400-403(4), NONE

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Abstract

본 논문에서는 콘크리트 혼화제로의 커들란의 영향을 연구한 논문으로 콘크리트 혼화제로서의 커들란의 효과를 높이는 방법을 연구하였다. 분말상태의 커들란의 혼화제로서의 효과는 웰란에 비해 많은 양을 필요로 하였으나 NaOH에 녹여 사용한 결과 우수한 유동화 특성을 보유하게 되었다. 커들란을 녹인 용액의 pH가 12.7일 때 가장 좋은 슬럼프 값을 나타냈다. 레미콘 크기의 pilot 시험기에서의 슬럼프 값의 변화는 커들란을 초유동화제로 사용했을 경우 효과가 우수하게 나타나 미생물유래 다당류는 콘크리트 혼합의 훌륭한 초유동화제로 사용될 수 있음을 밝혀냈다.

One of biopolymer, curdlan, was mixed with concrete to enhance the fluidity and to increase the strength of concrete. Using powder type of curdlan, its effect on fluidity was very low relative to that of welan due to solubility during mixing. To increase the solubility of curdlan, small amount of NaOH was added. As a result, the fluidity of concrete was greatly improved with NaOH addition and the strength of concrete was also improved. The optimal pH of dissolving solution for the_x000D_ best quality concrete was pH 12.7. The pilot scale experiment also showed good performance in the slump value and also in concrete strength. From these experiments, we can approve that curdlan produced from microorganism is a good super plasticizer for concrete mixture.

Keywords

Concrete Curdlan Super Plasticizer Alkali Solution

References

Eum MH, Choi JJ, Lee JS, Korean Solid Wastes Eng. Soc., 12, 69 (1995)
Rho JS, Proceedings of Chemical Technology Meeting, PL-1 (1993)
Kim JK, Han SH, Park YD, Noh JH, J. Korea Concrete Inst., 8, 135 (1996)
Bae SH, Youn SD, Jeong YS, Kim YE, J. Korea Cncrete Inst., 6, 135 (1994)
Rho JS, Hong SS, Kim DS, J. Korea Concrete Inst., 7, 189 (1995)
Kim MH, Kim MH, J. Assoc. Architectural Inst. Korea, 2, 135 (1986)
Han CG, Kim GC, J. Korea Concrete Inst., 10, 147 (1998)
Kim GS, Kim YJ, J. Assoc. Architectural Inst. Korea, 12, 257 (1996)
Rho JS, Hong SS, Cho HY, Chem. Ind. Technol., 12(5), 397 (1994)