PURPOSES : Concrete pavement is excellent in structural performance and durability. However, its functionality – such as noise and skid resistance – is a shortcoming. Functionality such as noise reduction and skid resistance of concrete pavement is affected by the texture surface, and the texture surface is classified according to the length of the wavelength. In recent years, Fine-size exposed aggregate concrete pavement has been applied, which has excellent structural performance and durability, and secures functionalities such as noise reduction and long-term skid resistance by randomly forming texture surface. Fine-size exposed aggregate concrete pavements are constructed by removing the surface cement binder to randomly expose coarse aggregate and their functionality is mainly governed by the surface texture. However, deteriorated concrete by tire-pavement friction and deicing agent may cause abrasion and aggregate loss on the surface texture; thus reducing their functional performances. Abrasion is created by the thin cutoff of aggregate texture under repeated tire-pavement friction. In addition, aggregate loss is defined by the detachment of aggregates from cement binder. This study aims to evaluate the abrasion and aggregate loss of Fine-size exposed aggregate concrete pavement surface texture under tire-pavement friction and scaling tests.
METHODS : In the study, abrasion and aggregate loss of tining and exposed aggregate concrete surface treatments were evaluated. Deterioration of each surface treatment was replicated by scaling test under ASTM C 672 test method. Afterward, abrasion test was conducted by ASTM C779 to simulate the tire-pavement friction under traffic. Consequently, abrasion and aggregate loss were measured.
RESULTS : Abrasion depth of non-scaling tining, 10-mm EACP, and 8-mm EACP was 1.76, 1.12, and 1.01mm, respectively. Compared to scaling surface treatments, the difference of abrasion depth in tining texture was the largest with value of 0.4mm. For both textures of finesize exposed aggregate concrete, abrasion depth difference was about 0.1mm. Moreover, The 10-mm EACP exhibited a 2.6% of aggregate loss rate caused by tire-pavement friction before conducting concrete deterioration test. After 40-cycle scaling test, aggregate loss increased up to 12.2%. For 8-mm EACP, aggregate loss rate was 1.7% on non-scaling concrete. Further, this rate was magnified up to 7.3% for the 40-cycle scaling concrete.
CONCLUSIONS : Under non-scaling or scaling tests, fine-size exposed aggregate concrete pavement showed better abrasion resistance than tining texture since tining was formed by aggregates and cement binder. Additionally, rate of aggregate loss was significant when EACP experienced the deicing agent under numerous cycles of freeze-thaw action.

ABSTRACT
1. 서론
2. 연구전략 및 실험방법
    2.1. 연구전략
    2.2. 스케일링 저항성 시험을 이용한 콘크리트 열화
    2.3. Dressing Wheel Abrasion Test Machine를 이용한 마모 및 탈리 측정
3. 소입경 골재노출 콘크리트 포장의 마모 특성
    3.1. 소입경 골재노출 콘크리트 포장의 마모 특성 비교분석
    3.2. 소입경 골재노출 콘크리트 콘크리트 포장 열화 후타이어-노면조직 마찰에 의한 마모 특성
4. 소입경 골재노출 콘크리트 포장 열화 및 교통하중에 따른 탈리
    4.1. 소입경 골재노출 콘크리트 포장 열화에 따른 탈리 특성
    4.2. 소입결 골재노출 콘크리트 포장 열화 후 타이어-노면조직 마찰에 의한 탈리 특성
5. 결론
REFERENCES

• 문상봉(강릉원주대학교 토목공학과) | Moon Sang Bong
• 김영규(강릉원주대학교 방재연구소) | Kim Young Kyu
• 이승우(강릉원주대학교 토목공학과) | Lee Seung Woo 교신저자