Journal of the Korea Institute of Building Construction (한국건축시공학회지)

The Korean Institute of Building Construction (한국건축시공학회)
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Air Pollutant Removal Rates of Concrete Permeable Blocks Produced with Coated Zeolite Beads

코팅된 제올라이트 비드를 이용한 콘크리트 투수블록의 대기전구물질 제거율 평가

  • Park, Jun-Seo (Department of Architectural Engineering, Graduate School, Kyonggi University) ;
  • Yang, Keun-Hyeok (Department of Architectural Engineering, Kyonggi University)
  • Received : 2023.01.09
  • Accepted : 2023.02.16
  • Published : 2023.04.20
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Abstract

The objective of this study is to examine the removal rate of air pollutants, specifically sulfur oxides (SOx) and nitrogen oxides(NOx), using concrete permeable blocks containing zeolite beads coated with materials capable of eliminating these pollutants. Titanium dioxide(TiO2) powder and coconut shell powder were utilized for the removal of SOx and NOx and were applied as coatings on the zeolite beads. Concrete permeable block specimens embedded with the coated zeolite beads were produced using an actual factory production line. Test results demonstrated that the concrete permeable block containing zeolite beads coated with coconut shell powder in the surface layer achieved SOx and NOx removal rates of 12.5% and 99%, respectively, exhibiting superior performance compared to other blocks. Additionally, the flexural strength and slip resistance were 5.3MPa and 65BPN or higher, respectively, satisfying the requirements specified in KS F 4419 and KS F 4561. Conversely, the permeability coefficient exhibited low permeability, with grades 2 and 3 before and after contaminant pollution, according to the standard for 'design, construction, and maintenance of pavement using permeable block'. In conclusion, incorporating zeolite beads coated with coconut shell powder in the surface layer enables simultaneous removal of SOx and NOx, irrespective of ultraviolet rays, while maintaining adequate flexural strength and slip resistance. However, the permeability is significantly reduced, necessitating further improvements.

이 연구의 목적은 황산화물(SOx) 및 질소산화물(NOx)을 제거할 수 있는 소재를 코팅한 제올라이트 비드를 이용하여 제조된 콘크리트 투수블록의 대기전구물질의 제거율을 평가하는데에 있다. 대기전구물질인 SOx와 NOx를 제거하기 위해서 사용된 소재는 이산화티타늄(TiO2) 분말과 야자각 분말이며, 이 두 소재를 제올라이트 비드에 코팅하였다. 시편은 실제 공장생산라인을 이용하여 제올라이트 비드가 임베디드된 콘크리트 투수블록을 제작하였다. 실험결과 표층에서 야자각 분말로 코팅된 제올라이트 비드가 첨가된 콘크리트 투수블록의 SOx와 NOx 제거율은 각각 12.5% 및 99%로서 다른 블록보다도 우수한 성능을 발휘하였다. 또한, 휨 강도 및 미끄럼저항성은 각각 5.3MPa 및 65BPN 이상으로 KS F 4419 및 KS F 4561에서 제시된 값을 만족하였다. 반면, 투수계수는 서울특별시의 투수블록 포장 설계, 시공 및 유지관리 기준으로 협잡물 오염 전후에 각각 3 및 4등급으로 낮은 투수성을 보였다. 결과적으로 표층에서 야자각 분말로 코팅된 제올라이트 비드의 첨가는 충분한 휨강도 및 미끄럼저항성을 확보하면서 자외선에 관계없이 SOx와 NOx를 동시에 제거할 수 있지만, 투수성이 낮으므로 이에 대한 보완이 필요하다.

Keywords

Acknowledgement

This work was supported by the Technology development Program(S3302388) funded by the Ministry of SMEs and Startups(MSS, Korea).

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