Journal of the Korean Recycled Construction Resources Institute (한국건설순환자원학회논문집)

Korean Recycled Construction Resources Institute (한국건설순환자원학회)
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Durability Performance Evaluations on Resistance to Chloride Attack for Concrete Using LCD Waste Glass Powder

LCD 폐유리 미분말을 사용한 콘크리트의 염해내구성 평가

  • Kim, Seong-Kyum (Research Institute for Mega Structures, Korea University) ;
  • Lee, Kwang-Woon (Department of Civil Engineering, Kumoh national institute of technology) ;
  • Song, Jae-Ho (Department of Civil Engineering, Kumoh national institute of technology) ;
  • Jang, Il-Young (Department of Civil Engineering, Kumoh national institute of technology)
  • 김성겸 (고려대학교 초대형구조기술연구소) ;
  • 이광운 (금오공과대학교 토목공학과) ;
  • 송재호 (금오공과대학교 토목공학과) ;
  • 장일영 (금오공과대학교 토목공학과)
  • Received : 2018.10.18
  • Accepted : 2018.11.12
  • Published : 2018.12.30
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Abstract

In this study, we evaluated the feasibility and performance of LCD waste glass as a replacement for cement by using LCD waste glass powder which is generated from manufacturing process due to development of LCD industry. Experiments were carried out by replacing 10% and 20% cement of LCD waste glass with particle size of $12{\mu}m$ of LCD waste glass with OPC and particle size of $5{\mu}m$, respectively. Through experiments, basic properties, mechanical properties and durability of concrete were evaluated. Experimental results show that the compressive strength is high at 10% replacement ratio compared to 20%. The lower the particle size, the higher the strength. The durability test evaluated the chloride penetration performance through the chloride ion diffusion coefficient. The higher the substitution rate and the smaller the particle size, the lower the chloride ion diffusion coefficient and the better the OPC than the all substitution rate. As a result, LCD waste glass concrete with low granularity and proper replacement ratio is considered to be advantageous for durability under salt environment.

본 연구에서는 LCD 산업의 발전으로 인하여 제조 공정으로부터 발생되는 산업폐기물인 LCD 폐유리 미분말을 활용하여 시멘트 대체재로서 활용 가능성과 성능을 평가하였다. 실험은 OPC와 $5{\mu}m$의 입경을 가진 LCD 폐유리 $12{\mu}m$의 입경을 가진 LCD 폐유리를 각각 10%, 20% 시멘트와 치환하고 제작하여 실험을 통해 콘크리트의 기초 물성 및 역학적 특성 그리고 내구성 평가를 실시하였다. 실험결과 압축강도에서 20%에 비해 10%의 치환율에서 높은 강도가 나타났으며. 입경이 낮을수록 높은 강도를 보였다. 내구성 평가는 염소 이온 확산계수를 통하여 염화물 침투성능을 평가하였는데, 치환율이 높을수록 그리고 입경이 작을수록 낮은 염소 이온 확산계수가 나타내었고, 모든 치환율에서 OPC 보다 좋은 결과값을 나타내었다. 결국 낮은 조립율 및 적정 혼입율을 갖는 LCD 폐유리 콘크리트는 염해환경 하 내구성 확보에 유리한 재료라 판단된다.

Keywords

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Fig. 1. LCD waste glass powder

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Fig. 2 NT BUILD 492 Test view

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Fig. 3 NT BUILD 443 Test view

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Fig. 4. Compressive strength

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Fig. 5. Compressive activity

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Fig. 6 Diffusion coefficient(NT BUILD 492)

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Fig. 7 Total chloride content

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Fig. 8 Diffusion coefficient(NT BUILD 443)

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Fig. 9 Relationship between diffusion coefficient and compressive strength

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Fig. 10 Porosity properties of LCD concrete

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Fig. 11 Relationship incremental intrusion and pore size distribution with LCD waste glass powder

Table 1. Experimental design

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Table 2. Mix proportions

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Table 3. Physical properties of material

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Table 4. Chemical composition of material(%)

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Table 5. Compressive strength and activiry

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