This study aimed to evaluate the long-term field performance and microscopic deterioration characteristics of rehabilitation methods applied to alkali–aggregate reaction (AAR)-damaged concrete pavement sections. The effectiveness and limitations of each rehabilitation method were examined by integrating long-term tracking survey results with core-based visual inspection and damage rating index (DRI) analysis. The studied sections were classified into three rehabilitation conditions: a surface-hardener-treated section, a modified stone mastic asphalt (SMA) milling and overlay section, and an untreated jointed concrete pavement (JCP) section. The long-term pavement performance was evaluated using tracking survey data, including the highway pavement condition index (HPCI), international roughness index (IRI), and surface distress. Field cores were collected from each section and examined via visual inspection and DRI analysis. The DRI evaluation considered AAR-related damage features, such as gel-filled voids, cracks in coarse aggregates, reaction rims, cracks in cement paste, and gel-filled cracks. Long-term performance and microscopic deterioration characteristics differed according to the rehabilitation method used. The surface-hardener-treated section maintained a relatively stable HPCI level and showed a smaller increase in surface distress than the untreated JCP section, although its initial IRI remained higher than those of the comparison sections. The modified SMA milling and overlay section exhibited favorable surface functionality and ride quality; however, the DRI results indicated residual AAR-related deterioration in the underlying concrete slab. The untreated JCP section exhibited a lower HPCI and greater crack progression, whereas the sampled cores showed relatively low DRI values, indicating possible spatial variability in internal deterioration. The results indicate that the effectiveness of the rehabilitation methods for AAR-damaged pavement sections cannot be evaluated solely using surface performance indicators. The surface condition, ride quality, crack progression, and internal microscopic deterioration should be interpreted together to assess the rehabilitation effectiveness more rationally. The integrated evaluation framework combining a long-term tracking survey and core-based DRI analysis can support the selection of rehabilitation methods and the establishment of long-term maintenance strategies for AAR-damaged concrete pavements.

ABSTRACT
1. 서론
    1.1. 논문개요
2. 연구대상 및 방법
    2.1. 시험시공 구간 현황
    2.2. 장기 추적조사 방법
    2.3. 코어 채취조사 방법
    2.4. DRI 분석 방법
3. 포장상태 분석 결과
4. 코어 기반 미세 열화특성 분석 결과
    4.1. 코어 육안조사 결과
    4.2. DRI 분석 결과
    4.3. 장기 공용성과 미세 열화특성의 통합 해석
5. 결론
REFERENCES

• 류호준(㈜로드코리아 기술연구소 선임연구원) | Yoo Ho-jun
• 권순민(한국도로공사 도로교통연구원 연구위원) | Kwon Soon-min
• 이재훈(한국도로공사 도로교통연구원 연구위원) | Lee Jae-hoon Corresponding author
• 정원경(㈜한국건설품질시험연구원 대표이사) | Jung Won-kyong
• 박희영(㈜로드코리아 기술연구소 연구소장) | Park Hee-young