In this study, from the material properties of the aggregates into the actual applications were evaluated for utilizingthe air-cooled blast furnace slag as the coarse aggregates (SG) in PHC piles. The physical and chemical characters ofthe SG were satisfied the standards presented in KS F 2544 for concrete blast furnace slag aggregates. And it was satisfiedthe environmental-factor-evaluation, including the soluble, heavy metal elution and total mercury content, and etc. In casethe non-washed type SG is used, the S/A ratio adjustment according to micro-powder of the aggregate surface and chemicaladmixture adjustment are needed in order to satisfy the aimed material properties. As the replacement ratio of SGincreased, the manifestation rate of compressive strength of the PHC piles was decreased. Particularly, in case non-washingtype SG, the manifestation rate more decreased. Therefore, the elimination of the pop-out materials and cleaning processare necessary for the production process for using the SG as coarse aggregates of PHC Piles

I. 서 론
 II. 이론적 고찰
  1. PHC 파일
  2. 콘크리트용 고로슬래그 골재 규정 및 성질
 III. 실험계획 및 방법
  1. 실험계획
  2. 실험방법
 IV. SG 특성 평가
  1. SG의 물리/화학적 성질
  2. SG의 환경성 평가
  3. SG의 광물 분석
 V. 콘크리트 적용성 평가
  1. 굳지않은 콘크리트 특성
  2. 배합 특성 평가
  3. 굳은 콘크리트 특성
 VI. 결 론
 감사의 글
 References

• 윤기원(아주산업 기술연구소) | Ki-Won Yoon
• 박용규(아주산업 기술연구소) | Yong-Kyu Park Corresponding author