KSCE Journal of Civil and Environmental Engineering Research (대한토목학회논문집)

Korean Society of Civil Engeneers (대한토목학회)
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Investigation of Microstructural Characteristics of Foamed Concrete with Different Densities

미세구조 분석방법을 활용한 서로 다른 밀도를 가진 기포콘크리트 특성 분석

  • 정상엽 (세종대학교 건설환경공학과) ;
  • 조수성 (세종대학교 건설환경공학과) ;
  • 오서은 (세종대학교 건설환경공학과)
  • Received : 2022.09.28
  • Accepted : 2022.12.21
  • Published : 2023.02.01
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Abstract

A set of foamed concrete specimens with different densities were prepared, and several microscopic techniques, such as scanning electron microscope (SEM) and X-ray micro-computed tomography (micro-CT) were used to characterize the foamed specimens. The pore and solid characteristics of the specimens at different ages were examined to investigate the effect of aging on the materials. The compressive strength and the thermal conductivity of the foamed specimens were also evaluated, and the relationship between the material characteristics and properties was integrated to identify the effect of density and aging on the material properties.

서로 다른 밀도를 가진 기포콘크리트 시편을 생성하고, 각 시편의 특성을 SEM, micro-CT 등의 미세구조 분석 방법을 활용하여 분석하였다. 서로 다른 재령 일자에 대한 기포콘크리트 시편의 공극과 고체 구조를 분석함으로써, 재령 기간이 재료 특성 변화에 미치는 영향을 살펴보았다. 각 기포콘크리트 시편의 압축강도와 열전도도를 측정하여, 재료 물성과 미세구조적 특성 간의 상관관계에 대하여 분석하였으며, 결과를 통해 밀도와 재령 기간이 재료 강도에 미치는 영향을 확인하였다.

Keywords

Acknowledgement

본 연구는 정부(과학기술정보통신부)의 재원으로 한국연구재단의 지원(과제번호 2022R1C1C1004684) 및 국토교통부/국토교통과학기술진흥원의 지원으로 수행되었음(과제번호22NANO- B156177-03).

References

  1. Amran, Y. H., Farzadnia, N. and Ali, A. A. (2015). "Properties and applications of foamed concrete; A review." Construction and Building Materials, Vol. 101, No. 1, pp. 990-1005. https://doi.org/10.1016/j.conbuildmat.2015.10.112
  2. Chung, S. Y., Han, T. S., Kim, S. Y., Kim, J. H. J., Youm, K. S. and Lim, J. H. (2016). "Evaluation of effect of glass beads on thermal conductivity of insulating concrete using micro CT images and probability functions." Cement and Concrete Composites, Vol. 65, pp. 150-162. https://doi.org/10.1016/j.cemconcomp.2015.10.011
  3. Cui, F., Wang, X. L., Peng, S. and Vogel, C. (2004). "A parallel algorithm for Quasi Euclidean distance transform." Journal of Image and Graphics, Vol. 6, pp. 10.
  4. Gastaldi, D., Canonico, F., Capelli, L., Boccaleri, E., Milanesio, M., Palin, L., Croce, G., Marone, F., Mader, K. and Stampanoni, M. (2012). "In situ tomographic investigation on the early hydration behaviors of cementing systems." Construction and Building Materials, Vol. 29, pp. 284-290. https://doi.org/10.1016/j.conbuildmat.2011.10.016
  5. Hilal, A. A., Thom, N. H. and Dawson, A. R. (2015). "On void structure and strength of foamed concrete made without/with additives." Construction and Building Materials, Vol. 85, pp. 157-164. https://doi.org/10.1016/j.conbuildmat.2015.03.093
  6. Jiang, J., Lu, Z., Niu, Y., Li, J. and Zhang, Y. (2016). "Study on the preparation and properties of high-porosity foamed concretes based on ordinary portland cement." Materials and Design, Vol. 92, pp. 949-959. https://doi.org/10.1016/j.matdes.2015.12.068
  7. Kearsley, E. P. and Wainwright, P. J. (2002). "The effect of porosity on the strength of foamed concrete." Cement and Concrete Research, Vol. 32, No. 2, pp. 233-239. https://doi.org/10.1016/S0008-8846(01)00665-2
  8. Lim, S. K., Tan, C. S., Lim, O. Y. and Lee, Y. L. (2013). "Fresh and hardened properties of lightweight foamed concrete with palm oil fuel ash as filler." Construction and Building Materials, Vol. 46, pp. 39-47. https://doi.org/10.1016/j.conbuildmat.2013.04.015
  9. Mehta, P. K. and Monteiro, P. J. M. (2013). Concrete: Microstructure, properties, and materials (4th ed.), McGraw-Hill Education, USA.
  10. Neville, A. M. (2012). Properties of concrete (5th ed.), Pearson Education, England.
  11. Otsu, N. (1979). "A threshold selection method from gray-level histograms." Man and Cybernetics, Vol. 9, No. 1, pp. 62-66. https://doi.org/10.1109/TSMC.1979.4310076
  12. Ramamurthy, K., Nambiar, E. K. and Ranjani, G. (2009). "A classification of studies on properties of foam concrete." Cement and Concrete Composites, Vol. 31, No. 6, pp. 388-396. https://doi.org/10.1016/j.cemconcomp.2009.04.006
  13. Wei, S., Yiqiang, C., Yunsheng, Z. and Jones, M. R. (2013). "Characterization and simulation of microstructure and thermal properties of foamed concrete." Construction and Building Materials, Vol. 47, pp. 1278-1291. https://doi.org/10.1016/j.conbuildmat.2013.06.027
  14. Yang, K. H., Lo, C. W. and Huang, J. S. (2013). "Production and properties of foamed reservoir sludge inorganic polymers." Cement and Concrete Composites, Vol. 38, pp. 50-56. https://doi.org/10.1016/j.cemconcomp.2013.03.017
  15. Zhang, Z., Provis, J. L., Reid, A. and Wang, H. (2015). "Mechanical, thermal insulation, thermal resistance and acoustic absorption properties of geopolymer foam concrete." Cement and Concrete Composites, Vol. 62, pp. 97-105. https://doi.org/10.1016/j.cemconcomp.2015.03.013