Journal of the Korea Institute of Building Construction (한국건축시공학회지)

The Korean Institute of Building Construction (한국건축시공학회)
권호 표지
DOI QR코드

DOI QR Code

A Fundamental Test on Insulation Aerated Concrete Containing Hydrophobic Aerogels

소수성 에어로겔을 혼입한 단열 기포콘크리트 기초연구

  • Yoon, Hyun-Sub (Department of Architectural Engineering, Kyonggi University Graduate School) ;
  • Yang, Keun-Hyeok (Department of Plant.Architectural Engineering, Kyonggi University)
  • Received : 2017.09.06
  • Accepted : 2017.10.25
  • Published : 2017.12.20
Download PDF
⟨ Previous Next ⟩

Abstract

This study is a pioneer investigation to enhance the insulation capacity of the conventional aerated concrete using hydrophobic aerogels. As the main test parameters, aerogel content varied from 0% to 40% of the foam volume. Test results showed that the compressive strength of aerated concrete containing aerogels was lower by 17%~34% than that of the conventional aerated concrete. In addition, the effect of the aerogels on reducing thermal conductivity of aerated concrete is insignificant because of the partial condensation and abnormal distribution of the hydrophobic aerogels. Hence, further hydrophilic treatment for the surface of aerogels is recommended to minimize the decrease in compressive strength and enhance the insulation capacity of aerated concrete.

본 연구는 습식형 기포콘크리트의 단열성능 향상을 위한 소수성 에어로겔 기술 융합의 기초연구이다. 주요 실험변수는 에어로겔 혼입양으로서 기포 부피 대비 0%에서 40%로 변화하였다. 실험결과 에어로겔 혼입 기포 콘크리트의 압축강도는 일반 기포콘크리트에 비해 약 17%~34% 낮았다. 에어로겔이 기포 콘크리트 열전도율 저감에 미치는 영향도 미미하였는데, 이는 소수성 에어로겔의 비균질 분포 및 부분적 응집 때문이다. 따라서 에어로겔 혼입 기포콘크리트의 강도 및 열전도율 향상을 위해서는 에어로겔에 친수성을 부여하는 기술이 요구된다.

Keywords

References

  1. Kim JM, Choi HG, Park SG. An experimental study on the pore structure and thermal properties of lightweight foamed concrete by forming agent type. Journal of the Korea Institute of Building Construction. 2009 Aug;9(4):63-73. https://doi.org/10.5345/JKIC.2009.9.4.063
  2. Chu YS, Seo SK, Im DH, Song H, Lee JK, Lee SH. A study for physical properties of ALC using different quartzite. Journal of the Korean Recycled Construction Resources Institute. 2011 Dec;6(4):89-94.
  3. Kim JM, Jung JY, Hwang EH, Shin SC. Properties of foamed concrete according to types and concentrations of foam agent. Journal of the Korea Concrete Institute. 2012 Feb;24(1):61-70. https://doi.org/10.4334/JKCI.2012.24.1.061
  4. Lee KH, Yang KH. Effect of fiber addition for improving the properties of lightweight foamed concrete. Journal of the Korea Institute of Building Construction. 2015 Aug;15(4):383-89. https://doi.org/10.5345/JKIBC.2015.15.4.383
  5. Yang KH. Foamed concrete with a new mixture proportioning method comparable to the quality of convectional ALC block. Journal of the Korea Institute of Building Construction. 2015 Feb;15(4):1-7. https://doi.org/10.5345/JKIBC.2015.15.1.001
  6. Lee SH, Jung YW, Park JJ. A study on the sound absorption properties of cellular concrete with continuous voids. Journal of the Korea Concrete Institute. 2003 Jan;15(4):566-73. https://doi.org/10.4334/JKCI.2003.15.4.566
  7. Ramamurthy K, Nambiar EKK, Indu Siva Ranjani GA. A classification of studies on properties of foam concrete. Cement and Concrete Research. 2009 Jul;31(6):388-96. https://doi.org/10.1016/j.cemconcomp.2009.04.006
  8. Lee KH. Development of mixture proportioning model for low-density high-strength foamed concrete [master's thesis]. [Suwon]: Kyonggi University; 2013. 103 p.