Journal of the Korea Institute of Building Construction (한국건축시공학회지)

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

DOI QR Code

A Comparative Study of Sulfate and Chloride Intrusion in Mortar Sections: An Approach Using Laser Induced Breakdown Spectroscopy and Ion Exchange Membrane

LIBS와 이온교환막을 활용한 모르타르 단면 침투 황산염과 염화물 분석

  • Park, Won-Jun (Department of Architectural Engineering, Kangwon National University)
  • Received : 2023.03.28
  • Accepted : 2023.06.07
  • Published : 2023.06.20
Download PDF
⟨ Previous Next ⟩

Abstract

This research aimed to conduct an empirical assessment of the penetration of chloride and sulfate ions into mortar sections using an anion exchange membrane(AEM) and laser-induced breakdown spectroscopy(LIBS). The study involved a simultaneous ion chromatography(IC) analysis and LIBS analysis performed on mortars immersed in varying concentrations of chloride and sulfate. The findings revealed that at the wavelengths specific to Chloride(837.59nm) and Sulfur(921.30nm), the LIBS intensity achieved using AEM surpassed that obtained with a paper substrate at equivalent penetration concentrations. A robust correlation was confirmed between LIBS intensity and chloride ion concentration. Furthermore, when juxtaposed with IC analysis concentration outcomes at identical depths, the AEM displayed a higher intensity. The research noted an enhancement in LIBS intensity and a diminution in errors within the low-concentration section when deploying AEM. However, for the Sulfur wavelength of 921.3nm, there remains a need to augment the sensitivity of the LIBS signal within the low-concentration section in future studies. The findings underscore the potential of employing AEM and LIBS for precise analysis of chloride and sulfate ion penetration into mortar sections. This strategy can aid in bolstering assessment precision and mitigating errors, particularly in regions with low concentrations. It is recommended to further research and develop methods to amplify the sensitivity of the LIBS signal for sulfur detection in low-concentration sections. In sum, the study accentuates the significance of employing advanced techniques like AEM and LIBS for efficacious and precise analysis in the domain of mortar section assessment.

본 연구에서는 모르타르 내 침투 염화물과 황산염 분석을 단면 깊이별 용출액을 대상으로 음이온교환막(AEM)과 LIBS를 활용하여 수행하였다. 염화물(황산염) 농도별로 침지한 모르타르를 대상으로 IC 분석과 LIBS 분석을 동시에 진행하였다. 실험 결과로, Cl(837.59nm) 및 S(921.3nm)의 파장에서 AEM은 동일 침투 농도에서 paper substrate보다 높은 LIBS 강도가 측정되었고, LIBS 강도와 Cl농도 사이의 높은 상관관계가 확인되었다. 동일 깊이 IC 분석 농도 결과와 비교할 때, AEM을 활용하여 높은 강도를 얻을 수 있었다. AEM을 통해 저농도 구간의 LIBS 강도 향상과 오차 저감을 확인하였으나, S(921.3nm)의 경우는 저농도 구간에 대한 LIBS 신호 감도의 향상이 향후 필요할 것으로 보인다.

Keywords

Acknowledgement

Special thanks to Wan-ki Min(SPECLIPSE) and Hwa-sung Ryu(Hanyang E&C), for helping to curate data using LIBS.

References

  1. Ryu HS, Park WJ. Analysis of chloride content in aqueous solution and mortar using laser induced breakdown spectroscopy. Journal of the Korea Institute of Building Construction. 2021 Jun;21(3):189-94. https://doi.org/10.5345/JKIBC.2021.21.3.189
  2. Park WJ. Analysis of chloride penetration in mortar sections using laser induced breakdown spectroscopy. Journal of the Korea Institute of Building Construction. 2021 Dec;21(6):583-91. https://doi.org/10.5345/JKIBC.2021.21.6.583
  3. Park WJ. Analysis of heavy metal concentration in by-products for construction using laser induced breakdown spectroscopy and membrane. Journal of the Korea Institute of Building Construction. 2023 Apr;23(2):113-21. https://doi.org/10.5345/JKIBC.2023.23.2.113
  4. Woo SK, Chu IY, Youn BD. An experimental study on the application of libs for the diagnosis of concrete deterioration. Journal of the Korea Institute for Structural Maintenance and Inspection. 2017 Nov;21(6):140-6. https://doi.org/10.11112/jksmi.2017.21.6.140
  5. Millar S, Gottlieb C, Gunther T, Sankat N, Wilsch G, KruschwitzS. Chlorine determination in cement-bound materials with Laser-induced Breakdown Spectroscopy (LIBS) - A review and validation. Spectrochimica Acta Part B: Atomic Spectroscopy. 2018 Sep;147:1-8. https://doi.org/10.1016/j.sab.2018.05.015
  6. Mateo J, Quintero MC, Fernandez JM, Garcia MC, Rodero A. Application of LIBS technology for determination of Cl concentrations in mortar samples. Construction and Building Materials. 2019 Apr;204:716-26. https://doi.org/10.1016/j.conbuildmat.2019.01.152
  7. Sanghapi HK, Ayyalasomayajula KK, Yueh FY, Singh JP, McIntyre DL, Jain JC, Nakano J. Analysis of slags using laser-induced breakdown spectroscopy. Spectrochimica Acta Part B: Atomic Spectroscopy. 2016 Jan;115:40-5. http://dx.doi.org/10.1016/j.sab.2015.10.009
  8. Caneve L, Colao F, Fabbri F, Fantoni R, Spizzichino V, Striber J. Laser-induced breakdown spectroscopy analysis of asbestos. Spectrochimica Acta Part B: Atomic Spectroscopy. 2005 Aug;60(7-8):1115-20. https://doi.org/10.1016/j.sab.2005.05.014
  9. Yao S, Zhang L, Zhu Y, Wu J, Lu Z, Lu J. Evaluation of heavy metalelement detection in municipal solid waste incineration fly ashbased on LIBS sensor. Waste Management. 2020 Feb;102:492-8. https://doi.org/10.1016/j.wasman.2019.11.010
  10. Stankova A, Gilon N, Dutruch L, Kanicky V. A simple LIBS method for fast quantitative analysis of fly ashes. Fuel. 2020 Nov;89(11):3468-74. https://doi.org/10.1016/j.fuel.2010.06.018
  11. Schmidt NE, Goode SR. Analysis of aqueous solutions by laser-induced breakdown spectroscopy of ion exchange membranes. Applied spectroscopy. 2002 Mar;56(3):370-4. https://doi.org/10.1366/0003702021954746