Currently, Eco-friendly construction materials are widely utilized for reducing CO2 emission in construction. Furthermore various engineering fibers are also added for improving a brittle behavior in concrete. In the paper, concrete specimens with 10% and 20% replacement ratio with RHA (Rice Husk Ash) are prepared, and engineering behaviors in RHA and OPC concrete are evaluated with different addition of coconut fiber from 0.125~0.375% of volume ratio. Several basic tests including compressive strength, tensile strength, flexural strength, impact resistance, and bond strength are performed, and crack width and deflections are also measured in flexural test. RHA is evaluated to be very effective in strength development and 0.125% of fiber addition leads significant improvement in tensile strength, ductility, and crack resistance. RHA and coconut fiber are effective construction material both for reutilization of limited resources and performance improvement in normal concrete.

1. 서 론
 2. 실험계획 및 방법
  2.1 사용재료 및 배합특성
  2.2 실험항목 및 개요
 3. 천연섬유를 혼입한 RHA 콘크리트의 거동 평가
  3.1 압축강도 평가
  3.2 쪼갬인장강도 평가
  3.3 휨강도 평가
  3.4 내충격성 평가
  3.5 부착력 평가
 4. 결 론
 감사의 글
 References

• 이민희(호원대학교 건축공학과) | Min-Hi Lee
• 권성준(정회원, 한남대학교 건설시스템공학과) | Seung-Jun Kwon 교신저자
• 박기태(정회원, 한국건설기술연구원 인프라구조연구실) | Ki-Tae Park