LIBS와 이온교환막을 활용한 모르타르 단면 침투 황산염과 염화물 분석 (A Comparative Study of Sulfate and Chloride Intrusion in Mortar Sections: An Approach Using Laser Induced Breakdown Spectroscopy and Ion Exchange Membrane)

서지정보

· 발행기관 : 한국건축시공학회
· 수록지 정보 : 한국건축시공학회지 / 23권 / 3호 / 221 ~ 229페이지
· 저자명 : 박원준

초록

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 Cl-농도 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.

영어초록

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

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