Effects of Blasting Vibrations on Strength and Physical Properties of Curing Concrete

발파진동의 크기가 양생콘크리트의 강도와 물성에 미치는 영향

  • 임한욱 (강원대학교 자원공학과) ;
  • 박근순 (강원대학교 산업대학원 자원공학과) ;
  • 정동호 (강원대학교 자원공학과) ;
  • 이상은 (강원대학교 자원공학과)
  • Published : 1995.06.01

Abstract

Effects of blasting vibrations on curing concrete have not been well studied. As a result, unreasonable and strong blasting vibration constraints have been placed on blasting when it occurs in the vicinity of curing concrete. To study the effects of blasting on curing concrete blocks of 33.3X27.7X16.2 cm were molded and placed on the quarry. Several sets of concrete blocks were subjected separately to peak vibrations of 0.25, 0.5. 1.0, 5.0, and 10cm/sec. The impulses of blasting vibrations were applied with thirty-minute intervals. Along with unvibrated concrete blocks, the vibrated concrete samples cored with 60.3 mm in diameter were measured for elastic moduli, sonic velocity and uniaxial compressive strength. Test results can be summarized as follows; 1. The blasting vibrations between 6 and 8 hours after pour generally lowered on the uniaxial compressive strength of the concrete. 2. A low blasting vibration of 0.25 cm/sec did not affect the uniaxial compressive strength. As the magnitude of the blasting vibration increases, compressive strength of concrete is decreased. 3. Physical properties of the P-wave velocity, Young's modulus, and Poisson's ratio showed a weakly decreasing trend in the concrete blocks vibrated between 6 and 8 hours after pour.

Keywords

References

  1. 한국암반역학회지 v.4 no.1 인공진동의 크기가 양생콘크리트의 강도와 물성에 미치는 영향 정동호;이상은;임한욱
  2. 진동이 주변 구조물 및 콘크리트 경화에 미치는 영향 대한주택공사
  3. 한국자원공학회지 v.16 발파작업에 의한 지반진동이 지상구조물에 미치는 영향에 관한 연구 류창하;이정인
  4. Foundation Engineering(Edited by Leonards,G.A.) Pile Foundations Chellis,R.D.
  5. 한국자원공학회지 v.29 발파진동의 크기와 주파수 특성에 관한 연구 임한욱;김재동
  6. 최신 토목재료실험 박승범
  7. 소음.진동이론과 실무 정일록
  8. 건설진동의 영향평가 및 대책에 관한 연구 대우 건설기술연구소(주)
  9. 한국자원공학회지 v.28 발파진동의 속도 및 주파수를 고려한 허용 진동치 결정에 관한 연구 김대상;이정인;이희근
  10. 진동이 콘크리트의 초기강도에 미치는 영향에 대하여 권영웅
  11. The 20th U.S Symposium on Rock Mechanics Blast Vibration Analysis, Southern Illinois University Press 12. Ken Gray, "Effects of Blasting Vibrations on Curing Concrete" G.A.Bollinger