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2026 Vol.33, Issue 2 Preview Page

Research Article

Acoustic Performance of Recycled Glass Aggregate-Based Porous Concrete and Its Applicability through Café Space Simulation

폐유리 골재 기반 포러스 콘크리트의 음향 성능 및 카페 공간 시뮬레이션을 통한 적용 가능성 평가

Tae-Ho Park1
,
Ha-Min Eu2
,
Gyu-Yong Kim3
,
Joo-Young Hong4*
박 태호1
,
유 하민2
,
김 규용3
,
홍 주영4*
1Master's Student, Department of Architectural Engineering, Chungnam National University, Daejeon, Korea
2Postdoctoral Researcher, Department of Architectural Engineering, Chungnam National University, Daejeon, Korea
3Professor, Department of Architectural Engineering, Chungnam National University, Daejeon, Korea
4Assistant Professor, Department of Architectural Engineering, Chungnam National University, Daejeon, Korea
1충남대학교 건축공학과 석사 과정
2충남대학교 건축공학과 박사후연구원
3충남대학교 건축공학과 교수
4충남대학교 건축공학과 조교수
*Corresponding Author
30 April 2026. pp. 176-187
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Abstract

This study evaluated the feasibility of porous concrete using waste glass aggregates as an acoustic building material. Mechanical properties and sound absorption performance were examined, and room acoustic simulations were conducted using Odeon software. The results showed that the GB (Glass Bead) specimen exhibited the highest sound absorption performance, reaching a peak absorption coefficient of 0.71 at 1,000 Hz and a weighted sound absorption coefficient (aw) of 0.40, although it possessed very low mechanical strength. In contrast, LGS (Large Glass Sand) and SGS (Small Glass Sand) demonstrated balanced performance, with maximum absorption coefficients of 0.74 and 0.76 at 2,000 Hz, respectively, and aw values of 0.35 and 0.40. Simulation results indicated that replacing conventional concrete finishes with porous concrete reduced the Early Decay Time (EDT) by up to 33% and the reverberation time (T20), indicating an overall improvement in reverberation characteristics. In addition, D50 increased from 0.37 to 0.55, and C80 improved from 0.4 dB to 4.0 dB, suggesting enhanced acoustic clarity. Overall, while GB showed superior acoustic performance, its structural limitations restrict practical application. LGS and SGS are considered more suitable for non-structural acoustic finishing materials.

Keywords
Porous concrete
Waste glass aggregate
Sound absorption
Room acoustics
References
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Information
  • Publisher :The Korean Society of Living Environmental System
  • Publisher(Ko) :한국생활환경학회
  • Journal Title :Journal of The Korean Society of Living Environmental System
  • Journal Title(Ko) :한국생활환경학회
  • Volume : 33
  • No :2
  • Pages :176-187
  • Received Date : 2026-03-16
  • Revised Date : 2026-04-13
  • Accepted Date : 2026-04-17
  • DOI :https://doi.org/10.21086/ksles.2026.4.33.2.176
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