All Issue

2025 Vol.44, Issue 6 Preview Page

Research Article

Evaluation of acoustic performance of sound absorbing materials incorporating recycled aggregates from concrete sleepers

콘크리트 침목 재활용 순환골재를 활용한 흡음자재의 성능평가

Sungchan Lee1
,
Hyoin Koh2*
,
Jiyoung Hong2
,
Sungchul Bae3
,
Heongwon Suh4
,
Jaeyoung Lee2
이 성찬1
,
고 효인2*
,
홍 지영2
,
배 성철3
,
서 형원4
,
이 재영2
1강남대학교 부동산건설학부
2한국철도기술연구원
3한양대학교 건축공학부
4부산대학교 건축공학과
*Corresponding Author
30 November 2025. pp. 685-693
PDF XML Citation
Abstract

This study investigates the acoustic and mechanical properties of sound-absorbing materials fabricated using recycled aggregates derived from discarded railway sleepers . Fine aggregates were classified into three grades- H, M, and L - based on pretreatment conditions, and their structural and acoustic characteristics were analyzed in relation to the residual fine powder content. Mechanical tests revealed that the L-grade specimens, containing a higher amount of fine powder, exhibited the highest compressive and flexural strengths. X-ray micro-computed tomography (Micro-CT) analysis confirmed a densely packed internal structure in the L-grade samples. The impedance tube measurements demonstrated that the L-grade specimen achieved superior sound absorption across a broad frequency range, with a Noise Reduction Coefficient (NRC) of approximately 0.45. These results indicate that fine powder removal through pretreatment has minimal impact on improving either mechanical or acoustic performance. Consequently, the findings highlight the potential for high-value recycling of construction waste materials, such as railway concrete sleepers, in noise control applications within transportation and civil infrastructure systems.

Keywords
Recycled aggregate
Sound-absorbing material
Pretreatment
Acoustic performance
Construction waste recycling

본 연구에서는 폐철도 침목과 같은 건설폐기물에서 재활용된 순환골재 기반 흡음재의 강도 및 음향적 특성이 평가되었다. 잔골재는 전처리 조건에 따라 H, M, L 등급으로 구분되었고, 미분말 잔존량 차이에 따라 구조적, 음향적 특성이 분석되었다. 강도시험 결과, 미분말 함량이 높은 L 등급 시편에서 가장 높은 압축강도와 휨강도가 발현되었으며, X-ray Micro-CT 분석에서도 L 등급은 조밀한 내부 충진 구조를 보였다. 임피던스 튜브(관내법)로 측정한 흡음률 역시 L 등급이 대부분의 주파수 대역에서 우수했고, 단일수치평가량 NRC는 약 0.45로 확인되었다. 시험체 유형에 대한 전반적인 결과를 보아, 미분말 제거를 위한 전처리 과정이 강도나 흡음 성능 향상에 유의한 기여를 하지 않았다. 결과적으로 본 연구는 철도 콘크리트 침목 등 건설폐기물의 철도 및 토목 인프라 소음저감 분야에 대한 효율적 재활용 가능성을 제시한다.

키워드
순환골재
흡음재
전처리
음향 성능
건설폐기물 재활용
References
1

H. Suh, T. Park, E. Zalnezhad, and S. Bae, “Synthesis and characterization of cement clinker using recycled pulverized oyster and scallop shell as limestone substitutes,” J. Cleaner Prod. 278, 123987 (2021).

10.1016/j.jclepro.2020.123987
2

B. Wang, L. Yan, Q. Fu, and B. Kasal, “A comprehensive review on recycled aggregate and recycled aggregate concrete,” Resour. Conserv. Recycl. 171, 105565 (2021).

10.1016/j.resconrec.2021.105565
3

J. Xiao, Y. Tang, H. Chen, H. Zhang, and B. Xia, “Effects of recycled aggregate combinations and recycled powder contents on fracture behavior of fully recycled aggregate concrete,” J. Cleaner Prod. 366, 132895 (2022).

10.1016/j.jclepro.2022.132895
4

S. D. Datta, M. H. R. Sobuz, A. S. M. Akid, and S. Islam, “Influence of coarse aggregate size and content on the properties of recycled aggregate concrete using non-destructive testing methods,” J. Build. Eng. 61, 105249 (2022).

10.1016/j.jobe.2022.105249
5

KS F 2403, Method of Making Test Specimens for Concrete Strength Tests, 2019.

6

KS F 2405, Test Method for Compressive Strength of Concrete, 2020.

7

KS F 2408, Standard Test Method for Flexural Strength of Concrete, 2016.

8

ISO 679:2009(E), Cement – Test Methods – Determination of Strength, 2009.

9

ISO 10534-2:2023, Acoustics – Determination of Acoustic Properties in Impedance Tubes Part 2: Two-Microphone Technique for Normal Sound Absorption Coefficient and Normal Surface Impedance, 2023.

10

Korea Railroad Research Institute, “Development of improvement technology of railroad environment”, Research Rep., 2014.

10.23000/TRKO201500001059
Information
  • Publisher :The Acoustical Society of Korea
  • Publisher(Ko) :한국음향학회
  • Journal Title :The Journal of the Acoustical Society of Korea
  • Journal Title(Ko) :한국음향학회지
  • Volume : 44
  • No :6
  • Pages :685-693
  • Received Date : 2025-10-13
  • Revised Date : 2025-11-07
  • Accepted Date : 2025-11-18
  • DOI :https://doi.org/10.7776/ASK.2025.44.6.685
Journal Informaiton The Journal of the Acoustical Society of Korea The Journal of the Acoustical Society of Korea
E-Book
  • scopus_JASK
  • ESCI_JASK
  • Google scholar_JASK
  • NRF
  • KOFST
  • KISTI Current Status
  • KISTI Cited-by
  • crosscheck
  • orcid
  • ccl
Journal Informaiton Journal Informaiton - close