Journal of the Society of Disaster Information (한국재난정보학회 논문집)

The Korean Society of Disaster Information (한국재난정보학회)
권호 표지
DOI QR코드

DOI QR Code

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

산업부산물을 활용한 LCD 유리 미분말 혼입 콘크리트의 황산염침식 저항성

  • Kim, Seong-Kyum (Department of Civil Engineering, Daegu University) ;
  • Song, Jae-Ho (Department of Civil Engineering, Kumoh National Institute of Technology)
  • Received : 2019.04.02
  • Accepted : 2019.06.20
  • Published : 2019.06.28
Download PDF
⟨ Previous Next ⟩

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 $Na_2SO_4$ 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 $MgSO_4$ 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.

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 $Na_2SO_4$ 용액에 침지한 실험결과에서 가장 적은 중량, 부피 및 압축강도 감소율을 나타냈다. 반면, $MgSO_4$에 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.

Keywords

JNJBBH_2019_v15n2_239_f0001.png 이미지

Fig. 1. Compressive strength for concrete partially substituted by LCD powder

JNJBBH_2019_v15n2_239_f0002.png 이미지

Fig. 2. Compressive strength for concrete partially substituted by LCD powder

JNJBBH_2019_v15n2_239_f0003.png 이미지

Fig. 3. Pore distribution of specimen obtained from concrete blended with LCD powder

JNJBBH_2019_v15n2_239_f0004.png 이미지

Fig. 4. Deterioration of LCD-mixed concrete after exposure of different sulfate solutions for 12, 26 weeks

JNJBBH_2019_v15n2_239_f0005.png 이미지

Fig. 5. Variation of Compressive strength for concrete containing LCD powder under sulfate-bearing environments

Table 1. Chemical and physical properties of binders

JNJBBH_2019_v15n2_239_t0001.png 이미지

Table 2. Physical properties of fine and coarse aggregate

JNJBBH_2019_v15n2_239_t0002.png 이미지

Table 3. Mix design for OPC concrete replaced by LCD powder

JNJBBH_2019_v15n2_239_t0003.png 이미지

References

  1. Aligizaki, K.K. (2006). Pore structure of cement-based materials-Testing, interpretation and requirements. CRC Press, Florida, USA.
  2. Bae, S., Park, J., Lee, K. (2010). "Influence of mineral admixtures on the resistance to sulfuric acid and sulfate attack in concrete." Journal of the Korea Concrete Institute, Vol. 22, No. 2, pp. 219-228. https://doi.org/10.4334/JKCI.2010.22.2.219
  3. Bonen, D. (1992). "Composition and appearance of magnesium silicate hydrate and its relation to deterioratino of cement-based materials." Journal of the American Ceramic Society, Vol. 75, No. 10, pp. 2904-2906. https://doi.org/10.1111/j.1151-2916.1992.tb05530.x
  4. Haynes, H., O'Neill, R., Neff, M., Mehta, P.K. (2008). "Salt weathering distress on concrete exposed to sodium sulfate environment." ACI Materials Journal, Vol. 105, No. 1, pp. 35-43.
  5. Kim, M., Baek, D. (2007). "Unit weight and compressive strength of cement mortars using crushed sand under sulfate attacks." Journal of the Korean Society of Civil Engineers, Vol. 27, No. 4-A, pp. 585-591.
  6. Kim, S.K., Kang, S.T., Kim, J.K., Jang, I.Y. (2017). "Effects of particle size and cement replacement of LCD glass powder in concrete." Advances in Materials Science and Engineering, Vol. 2017, pp. 1-12.
  7. Kim, S., Hanif, A., Jang, I. (2018). "Incorporating Liquid Crystal Display (LCD) Glass Waste as Supplementary Cementing Material (SCM) in Cement Mortars-Rationale Based on Hydration, Durability, and Pore Characteristics." Materials, Vol. 11, No. 12, pp. 1-14.
  8. Kim, S., Jang, P., Jang, I. (2017). "Material bahaviour and strength character of 150 MPa ultra high strength concrete using LCD glass powder as fine aggregate." Journal of the Korea Concrete Institute, Vol. 29, No. 6, pp. 615-623. https://doi.org/10.4334/JKCI.2017.29.6.615
  9. Kim, S., Lee, K., Song, J., Jang, I. (2018). "Durability performance evaluations on resistance to chloride attack for concrete using LCD waste glass powder." Journal of the Korean Recycled Construction Resources Institute, Vol. 4, No. 4, pp. 289-296.
  10. Lee, S.k., Kang, L., Lee, C.G., Hong, M.H. (2013). "Disassembly and Compositional, Analysis of Waste LCD Displays." Journal of the Korean Resources Recycling, Vol. 22, No. 2, pp. 29-36.
  11. Lee, S. (2009). "Magnesium sulfate attack and deterioration mode of matakaolin blended cement matrix." Journal of the Korea Concrete Institute, Vol. 21, No. 1, pp. 21-27. https://doi.org/10.4334/JKCI.2009.21.1.021
  12. Liu, Z., Zhang, F., Deng, D., Xie, Y., Long, G., Tang, X. (2017). "Physical sulfate attack on concrete lining-A field case analysis." Case Studies in Construction Materials, Vol. 6, pp. 206-212. https://doi.org/10.1016/j.cscm.2017.04.002
  13. Mangat, P.S., Khatib, J.M. (1995). "Influence of Fly Ash, Silica Fume, and Slag on Sulfate Resistance of Concrete," ACI Materials Journal, Vol. 92, No. 5, pp. 542-552.
  14. Mehta, P.K. (1983). "Mechanism of Sulfate Attack on Portland Cement Concrete-Another Look." Cement and Concrete Research, Vol. 13, pp. 401-406. https://doi.org/10.1016/0008-8846(83)90040-6
  15. Moon, H., Lee, S., Kim, H., Kim, S. (2002). "Evaluation on the resistance of Portland cement mortars due to chemical attack." Journal of the Korean Society of Civil Engineers, Vol. 22, No. 1-A, pp. 181-191.
  16. Moon, H.Y., Jeon, J.K., Kim, H.S. (2005). "Resistance on the sulfuric acid corrosion of cement matrix containing mineral admixture." Journal of the Korean Society of Civil Engineers, Vol. 25, No. 1-A, pp. 225-232.
  17. Narayanan, N. (2008). "Quantifying the effects of hydration enhancement and dilution in cement pastes containing coarse glass powder." Journal of Advanced Concrete Technology, Vol. 6, No. 3, pp. 397-408. https://doi.org/10.3151/jact.6.397
  18. Park, K., Cho, Y., Shin, D. (2017). "Effects of magnesium and sulfate ions on the sulfate attack resistance of alkali-activated materials." Journal of the Korea Concrete Institute, Vol. 29, No. 4, pp. 415-424. https://doi.org/10.4334/JKCI.2017.29.4.415
  19. Santhanam, M., Cohen, M.D., Olek, J. (2003). "Mechanism of Sulfate Attack : A Fresh Look Part 2 : Proposed Mechanisms."Cement and Concrete Research, Vol. 33, No. 3, pp. 341-346. https://doi.org/10.1016/S0008-8846(02)00958-4
  20. Seo, Y. (2015). "Characterization of high concentration PM2.5 by nitrate and ammonium ions of PM2.5 in Seoul." Journal of Korea Society of Environmental Administration, Vol. 21, No. 1, pp. 1-7.
  21. Shin, D., Kang, L., Park, J.L., Lee, C.G., Yoon, J., Hong, H.S. (2015). "Current research trend on recycling of waste flat panel display panel glass." Journal of Korean Institute of Resources Recycling, Vol. 24, No. 1, pp. 58-65. https://doi.org/10.7844/kirr.2015.24.1.58
  22. Wee, T.H., Suryavanshi, A.K., Wong, S.F., AnisurRahman, A.K.M. (2000). "Sulfate Resistance of Concrete Containing Mineral Admixtures." ACI Materials Journal, Vol. 97, No. 5, pp. 536-549.
  23. Yang, H.J., Jin, S.H., Ann, K.Y. (2016). "Chloride transport of high alumina cement mortar exposed to a saline solution." Advances in Materials Science and Engineering, Vol. 2016, pp. 1-8.
  24. Yoshida, N., Matsunami, Y., Nagayama, M., Sakai, E. (2010). "Salt weathering in residential concrete foundation exposed to sulfate-bearing ground." Journal of Advanced Concrete Technology, Vol. 8, No. 2, pp. 121-134. https://doi.org/10.3151/jact.8.121
  25. Zheng, K. (2013). Eco-efficient concrete-11. Recycled glass concrete. Woodhead publishing, Cambridge, UK.
  26. Zhou, Y., Tian, H., Sui, L., Xing, F., Han, N. (2015). "Strength deterioration of concrete in sulfate environment: An experimental study and theoretical modeling." Advances in Materials Science and Engineering, Vol. 2015, pp. 1-13.