박테리아 영양소 성분이 시멘트 복합체의 초기 특성에 미치는 영향 (Effects of Bacterial Nutrients on Early Cement Composites Properties)

서지정보

· 발행기관 : 대한건축학회
· 수록지 정보 : 대한건축학회논문집 구조계 / 34권 / 3호 / 53 ~ 59페이지
· 저자명 : 장인동, 김백중, 이종구

초록

본 연구는 박테리아 활용 균열 자기치유 콘크리트 개발에 앞서 영양소가 자기치유에 미칠수 있는 영향을 고려하기 위해 영양소가 시멘트 복합체의 수화 및 역학 특성에 미치는 영향을 알아보았다. 실험 결과, 시멘트 복합체의 성능에 저하를 주지 않는 영양소의 첨가량은 요소와 질산칼슘은 3%까지, 젖산칼슘은 1.5%까지로 나타났다. YE의 경우 첨가량에 상관없이 시멘트의 수화에 악영향을 주는 것으로 나타났다.

영어초록

When manufacturing self-healing concrete using bacteria, nutrients are added to increase the activity of the bacteria. Although manyresearches have focused on the effects of nutrients containing bacterial healing agent on concrete, few have studied the effects of solenutrient on self-healing of cement composites. Bacterial nutrients, like commercial chemical admixtures, affect hydration characteristics such asflow, setting, hydration heat, mechanical strength of cement composites and also affect the self healing of cement composites by hydration ofunhydrated particles. In this study, effect of the four nutrient commonly used in the existing literature on the hydration characteristics ofcement composites by its addition was investigated. Flow, setting time, hydration heat, compressive strength have studied for each nutrientsadded by 1.5% and 3% of cement weight. Experimental results shows that urea and calcium-nitrate can be used up to 3% without significantdetrimental effect on cement composites. Addition of calcium-lactate up to 1.5% show better compressive strength than control, but additionof 3% show almost non-hydration. Yeast extract shows detrimental effects on the composites regardless of the amount added.

참고자료

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