All Issue

2024 Vol.17, Issue 1 Preview Page

Original Article

Performance Evaluation of Quality-Improved Recycled Aggregate Using Ultrasonic Wave and Chemical Neutralization Reaction

초음파 세척 및 화학적 중화반응을 이용한 품질 개선된 순환골재의 성능 평가

Jay Jang-Ho Kim1*
,
Young-Jun You2
김 장호1*
,
유 영준2
1Professor, School of Civil and Environmental Engineering, Yonsei University
2Research Fellow, Department of Structural Engineering Research, Korea Institute of Civil Engineering and Building Technology
1연세대학교 건설환경공학과 교수
2한국건설기술연구원 구조연구본부 연구위원
*Corresponding Author
31 March 2024. pp. 27-35
PDF XML Citation
Abstract

This paper presents experimental research results to evaluate the applicability of chemical neutralization reaction and ultrasonic wave to remove cement paste and mortar attached to the surface of recycled aggregate. In order to derive optimal ultrasonic cleaning efficiency and chemical neutralization reaction, experiments were conducted using variables such as ultrasonic frequency and type of chemical solution. As a result, the optimal frequency was found to be 24 kHz, and immersion in a 15% hydrochloric acid solution for 30 minutes of stimulation showed the highest efficiency. In addition, the specific gravity, absorption rate, and wear rate of the quality-improved recycled coarse aggregate were similar to those of general aggregate and were found to satisfy all KS F 2527 standards. Therefore, it is believed that the recycled aggregate whose quality has been improved through the method proposed in this study can be used for concrete.

Keywords
Ultrasonic wave
Recycled aggregate
Neutralization reaction
Aggregate for concrete

본 논문은 순환골재 표면에 부착된 시멘트 페이스트 및 모르타르를 제거하는 데 있어 화학적 중화반응 및 초음파 세척의 적용 가능성을 평가하기 위한 실험적 연구 결과를 제시한다. 최적의 초음파 세척 효율 및 화학적 중화반응을 도출하기 위하여 초음파 진동수, 화학 용액의 종류 등을 변수로 한 실험이 수행되었다. 그 결과 최적 진동수는 24 kHz로 나타났으며, 염산 15% 용액에 침지시킨 후 30분 가진하는 것이 최적 조건이라는 결론이 도출되었다. 또한, 품질 개선된 순환 굵은 골재의 비중, 흡수율, 마모율은 일반골재와 유사하며 KS F 2527 기준을 모두 만족하는 것으로 나타났다. 따라서, 본 연구를 통해 제안된 방법을 통해 품질 개선된 순환골재는 콘크리트용으로 사용이 가능할 것으로 판단된다.

키워드
초음파 세척
순환골재
중화반응
콘크리트용 골재
References
1

Korea Construction Resources Association. (2021). Recycled Aggregates ‧ Best Practices for Recycled Aggregate Products. Seoul: KORAS. 52-53.

2

Korean Industrial Standards. (2007). Abrasion Test Method for Coarse Aggregate by Los Angeles Testing Machine. KS F 2508:2007. Seoul: KS. 1-8.

3

Korean Industrial Standards. (2019). Density and Absorption Test Methods for Coarse Aggregate. KS F 2503:2019. Seoul: KS. 1-6.

4

Korean Industrial Standards. (2022). Aggregates for Concrete. KS F 2527:2022. Seoul: KS. 5.

5

Ministry of Environment. (2020). National Waste Generation and Disposal Status. Sejong: MOE. 9-40, 778-910, 930-1045.

6

Ministry of Land, Infrastructure and Transport. (2018). Sixth (2019-2023) Aggregate Supply Master Plan. Sejong: MOLIT.

7

Ministry of Land, Infrastructure and Transport. (2022). 2023 Aggregate Supply Plan. Sejong: MOLIT.

8

Park, Chul Han. (2023). A Study on Demand Changes for Major Construction Materials according to Fluctuation of Construction Business. Construction and Economy Research Institute of Korea. 40-41.

9

Pilli, S., P. Bhunia, S. Yan, R. J. LeBlanc, R. D. Tyagi, and R. Y. Surampalli. (2011). Ultrasonic Pretreatment of Sludge: A Review. Ultrasonics Sonochemistry. 18(1): 1-18.

10.1016/j.ultsonch.2010.02.01420471901

Korean References Translated from the English

1

국토교통부 (2018). 제 6차(2019~2023) 골재수급 기본계획. 세종: 국토교통부.

2

국토교통부 (2022). 2023년도 골재수급계획. 세종: 국토교통부.

3

박철한 (2023). 건설 경기 변화에 따른 주요 건설자재 수요 변화 연구. 한국건설산업연구원. 40-41.

4

산업표준심의회 (2007). 로스앤젤레스 시험기에 의한 굵은 골재의 마모 시험 방법. KS F 2508:2007. 서울: 산업표준심의회. 1-8.

5

산업표준심의회 (2019). 굵은 골재의 밀도 및 흡수율 시험방법. KS F 2503:2019. 서울: 산업표준심의회. 1-6.

6

산업표준심의회 (2022). 콘크리트용 골재. KS F 2527:2022. 서울: 산업표준심의회. 5.

7

한국건설자원협회 (2021). 순환골재 ‧ 순환골재 재활용제품 우수활용사례집. 서울: 한국건설자원협회. 52-53.

8

환경부 (2020). 전국 폐기물 발생 및 처리현황. 세종: 환경부. 9-40, 778-910, 930-1045.

Information
  • Publisher :Korean Society of Disaster and Security
  • Publisher(Ko) :한국방재안전학회
  • Journal Title :Journal of Korean Society of Disaster and Security
  • Journal Title(Ko) :한국방재안전학회 논문집
  • Volume : 17
  • No :1
  • Pages :27-35
  • Received Date : 2024-02-01
  • Revised Date : 2024-03-09
  • Accepted Date : 2024-03-09
  • DOI :https://doi.org/10.21729/ksds.2024.17.1.27
Journal Informaiton Journal of Korean Society of Disaster and Security Journal of Korean Society of Disaster and Security
Online submission
  • KISTI Current Status
  • KISTI Cited-by
  • KCI 문헌 유사도 검사
  • orcid
  • open access
  • ccl
Journal Informaiton Journal Informaiton - close