[논문]캡슐화된 팽창성 무기재료 기반 고상 치유재 활용 시멘트 복합재료의 균열 자기치유 및 역학적 회복성능에 관한 실험적 연구

최연왕; 남은준; 김철규; 오성록

doi:10.14190/jrcr.2022.10.1.92

캡슐화된 팽창성 무기재료 기반 고상 치유재 활용 시멘트 복합재료의 균열 자기치유 및 역학적 회복성능에 관한 실험적 연구
An Experimental Study on Crack Self-Healing and Mechanical Recovery Performance of Cement Composites Materials Using Encapsulated Expandable Inorganic Materials based Solid Healing Materials 원문보기

Journal of the Korean Recycled Construction Resources Institute = 한국건설순환자원학회 논문집, v.10 no.1, 2022년, pp.92 - 100

최연왕 (세명대학교 토목공학과) , 남은준 (세명대학교 건설공학과) , 김철규 (세명대학교 건설공학과) , 오성록 (세명대학교 건설공학과)

초록
AI-Helper

본 논문에서는 SC가 시멘트 복합재료의 균열 자기치유 성능 및 역학적 회복성능에 미치는 영향을 평가하기 위하여 캡슐화된 팽창성 무기재료 기반 고상 치유재를 제조하였다. SC는 시멘트 복합재료에 혼합하여 기초특성, 투수시험, 하중 재부하 시험을 평가하였다. SC는 시멘트 복합재료의 플로우를 다소 향상되었으며, 압축강도는 약 10 % 감소하였다. 또한 휨강도의 경우 약 30 % 감소하였다. SC를 시멘트 복합재료에 5 % 혼합할 경우, Plain의 균열 자기치유율이 약 𝜟10 % 수준을 향상시키는 효과가 있는 것으로 나타났으며, 하중 재부하 실험 결과, Plain의 역학적 회복율을 약 𝜟20 % 수준을 향상시키는 것으로 나타났다. 균열 자기치유율과 하중 재부하 시험에 의한 역학적 회복율의 상관관계를 분석한 결과, SC로 인하여 Plain의 치유면적을 증대시킬 수 있는 것으로 판단된다.

Abstract ▼ AI-Helper

In this paper, to evaluate the effect of SC on the crack self-healing performance and mechanical recovery performance of cement composites, encapsulated intumescent inorganic material-based solid healing materials were prepared. SC was mixed with cement composite materials to evaluate the basic properties, permeability test, and load reload test. SC slightly improved the flow of cement composites, and the compressive strength decreased by about 10 %. Also, the flexural strength decreased by about 30 %. It was found that when SC was mixed with the cement composite material by 5 %, the crack self-healing rate of Plain was improved by about 𝜟10 %. As a result of the load reload test, it was found that the mechanical recovery rate of Plain was improved by about 𝜟20 %. In addition, as a result of analyzing the correlation between the crack self-healing rate and the mechanical recovery rate by the load reload test, it is judged that the healing area of the Plain can be increased due to SC.

주제어

표/그림 (15)

그림 Fig. 1. Manufacturing process of SC
그림 Fig. 2. Size of SC
표 Table 1. Mixing ratio of cement composites
그림 Fig. 3. Preparation of cracked specimens
그림 Fig. 4. Water permeability test
그림 Fig. 5. Reloading test
그림 Fig. 6. Correlation between initial flow and healing rate according to healing age (plain)
표 Table 2. Fundamental properties
그림 Fig. 7. Correlation between initial flow and healing rate according to healing age (SC5)
그림 Fig. 8. Correlation between healing period and healing rate of Plain and SC5
그림 Fig. 9. Reloading test result of flexural load of Plain
그림 Fig. 10. Reloading test result of flexural load of SC5
그림 Fig. 11. Healing rate according to preload
그림 Fig. 12. Healing rate according to healing period
그림 Fig. 13. Correlation between crack self-healing rate and mechanical recovery rate

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저자의 다른 논문 :

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용어 설명 출처 목록 (6)

용어 설명: PCR은 세균 특이성이 있는 primer를 이용하여 적은 수의 세균이 있을지라도 쉽게 검출할 수 있는 유용한 방법이며, 이를 이용하여 구강 내 치면세균막이나 타액에서 직접 세균을 검출할 수 있게 되었다[8].

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