화강암 골재를 사용한 콘크리트의 비파괴 시험에 의한 강도평가

Estimation of Compressive Strength of Concrete with Granitic Aggregates : Rebound hammer and Ultrasonic Methods

  • 김현우 (청주대학교 대학원) ;
  • 이종태 (주성대학 건설재료공학과) ;
  • 윤기원 (주성대학 건설재료공학과) ;
  • 김병극 (한국표준과학연구원 책임연구원) ;
  • 김무한 (충남대학교 건축공학과) ;
  • 한천구 (청주대학교 건축공학과)
  • 발행 : 1999.10.01

초록

It is required that the compressive strength of concrete should be estimated accurately from the view point of efficient quality control and maintenance of buildings. In this paper, the equations to estimate the compressive strength of concrete using granite aggregates were suggested for both rebound hammer method and ultrasonic pulse velocity method. The results were compared with those for different age or curing condition. The rebound numbers for concrete cured in air were larger than for concrete cured in water. The difference between rebound numbers for concrete cured in water and in air was larger than for concrete cured in water. The difference between rebound numbers for concrete cured in water and in air was larger when water cement ratio was high. Also, with the increase of age, the velocity of ultrasonic pulse for concrete cured in air was measured larger when compared with that in water.

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