PURPOSES : This study aims to provide quantitative profile values for the objective evaluation of concrete surface profile (CSP) grades in concrete structures. The main aims are to quantify the CSP grade required for concrete surface pretreatment and proposing a more suitable CSP grade for structural maintenance. METHODS : Initially, the challenges in measuring concrete surface profiles were outlined by analyzing pretreatment work and profile samples of concrete pavements. Theoretical foundations for quantifying concrete surface roughness were established, and regression models including linear regression, cubic regression, and log regression were selected. Additionally, the interquartile range anomaly removal technique was employed to preprocess the data for regression modeling. RESULTS : Concrete CSP profiles were measured through indoor tests, and the measured data were quantified. Linear regression, cubic regression, and log regression models were applied to each CSP grade for comparative analysis of the results. Furthermore, comparative studies were conducted through adhesion strength tests based on the CSP grade. CONCLUSIONS : Our results are expected to establish objective standards for the pretreatment stage of concrete repair and reinforcement. The derived reference values can inform standards for the restoration and reinforcement of concrete structures, thereby contributing to performance improvement. Moreover, our results may serve as primary data for the repair and reinforcement of various concrete structures such as airports, bridges, highways, and buildings.

1. 서론
2. 시편 표면의 거칠기 측정
    2.1. 3D 프로파일 측정
    2.2. 자료의 이상치 제거
3. CSP 샘플에 대한 거칠기 측정 및 회귀분석
    3.1. 중심선 평균 거칠기 (Ra) 방법
4. 회귀분석 결과 적용 및 활용 방안
    4.1. 회귀분석 결과
    4.2. 회귀분석 활용 방안
5. 결론
REFERENCES

• 최문규(인하대학교 공과대학 스마트시티공학과 박사과정) | Choi Moon Gyu
• 안성일(인하대학교 공과대학 토목공학과 박사과정) | An Sung Il
• 김병준(인하대학교 공과대학 토목공학과 박사과정) | Kim Byoung Jun
• 정진훈(인하대학교 공과대학 사회인프라공학과 교수) | Jeong Jin Hoon Corresponding author