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2019 Vol.15, Issue 2 Preview Page

Research Article

Resistance to Sulfate Attack of Concrete Containing LCD glass powder Using Industrial By-products

산업부산물을 활용한 LCD 유리 미분말 혼입 콘크리트의 황산염침식 저항성

김성겸1ㆍ송재호2*

Seong-Kyum Kim1, Jae-Ho Song2*

1Lecturer, Department of Civil Engineering, Daegu University, Gyeongsangbuk-do, Republic of Korea
2Professor, Department of Civil Engineering, Kumoh National Institute of Technology, Gyeongsangbuk-do, Republic of Korea
30 June 2019. pp. 239-248
PDF Citation
Abstract
Purpose: This study aims to enhance the resistance against sulfate attack compared to ordinary Portland cement (OPC) concrete by using liquid crystal display (LCD) as binder. Method: The fundamental properties including compressive strength and porosity of concrete replaced by LCD up to 15% at increments of 5% and in turn, the weight, volume, and strength loss of LCD-mixed concrete was analyzed. Results: For the concrete substituted by 5% of LCD, it showed the highest compressive strength at 28 days of curing, and particular at immersion of Na2SO4 solution, it was achieved the lowest loss of weight, volume and strength due to an decreased porosity at capillaries. In contrast, there is no distinct difference of the sulfate attack resistance between LCD-mixed concretes under exposure of MgSO4 solution, excepted for OPC concrete. Conclusion: In this study, comparison of resistance to sulfate attack between LCD-mixed concretes, and it would be proposed the possibility of LCD usage as binder through long-term verification with extended replacement ratio and identification of changes of hydrates in the cement matrix.
Keywords
LCD Glass Powder
Concrete Admixture
Pore Structure
Sulfate Attack
Industrial By-products
연구목적: 본 연구는 LCD 미분말의 혼입을 통해 기존의 OPC 콘크리트와 비교하여 황산염 침식 저항성을 높이는 것을 목적으로 한다. 연구방법: 연구를 위해 LCD 미분말의 치환율을 0-15%로 설정하여 콘크리트의 압축강도 및 공극률을 포함한 기초물성을 평가하고, 두 종류의 황산 용액 침지에 따른 중량, 부피 및 강도 변화를 비교분석하였다. 연구결과: LCD 미분말을 5% 치환한 경우 재령 28일에서 가장 높은 압축강도를 보였고, 특히 OPC과 비교하여 감소된 모세관 공극률은 Na2SO4 용액에 침지한 실험결과에서 가장 적은 중량, 부피 및 압축강도 감소율을 나타냈다. 반면, MgSO4에 노출된 경우, LCD 혼입은 OPC에 비해 높은 황산염 침식 저항성을 나타냈지만 혼입률에 따른 차이는 미비하였다. 결론: 본 연구를 통해 LCD 미분말 혼입에 따른 황산염 침식 저항성을 비교하였고, 해당 재료의 치환 범위 확대 및 수화물 조성 변화 분석을 동반한 장기 검증을 통해 LCD 사용가능성을 제고해야한다.
키워드
액정디스플레이 유리분말
콘크리트 혼화재
공극 구조
황산염침식
산업부산물
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Information
  • Publisher :The Korean Society of Disaster Information
  • Publisher(Ko) :한국재난정보학회
  • Journal Title :Journal of the Society of Disaster Information
  • Journal Title(Ko) :한국재난정보학회논문집
  • Volume : 15
  • No :2
  • Pages :239-248
  • DOI :https://doi.org/10.15683/kosdi.2019.06.30.239
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