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Change of Sea Sand Density by Washing

세척에 따른 바다모래 밀도 변화

  • Kim, Hyun-Sik (Department of Civil & Environmental Engineering, Incheon National University) ;
  • Lim, Ji-Young (Department of Civil & Environmental Engineering, Incheon National University) ;
  • Kim, Jin-Han (Department of Civil & Environmental Engineering, Incheon National University)
  • 김현식 (인천대학교 건설환경공학과) ;
  • 임지영 (인천대학교 건설환경공학과) ;
  • 김진한 (인천대학교 건설환경공학과)
  • Received : 2017.02.28
  • Accepted : 2017.03.20
  • Published : 2017.04.30

Abstract

The purpose of this research was to estimate density changes of sea sand by washing. To examine water content test, field density test, particle density test and measuring of dump regarding extracted sea sand and selling one. Measured result of mean particle density of barge and dump were $2.666g/cm^3$, $2.651g/cm^3$, respectively. Also, measured result of field density for each sea sand was $1.716g/cm^3$, $1.331g/cm^3$ on average. Converted to the volume of 1ton of each sea sand, $0.583m^3$, $0.751m^3$, respectively. Occurring to volume change approximately 28.8% on average. The mean field densities of measuring of sea sand that dump and barge were $1.398g/cm^3$ and $1.716g/cm^3$ respectively. This values indicated $0.715m^3$ and $0.583m^3$ each, when converted to the volume of sea sand 1ton. It was found that the average of 22.6% volume change occurred between the amount of sea sand and the sales volume.

본 연구에서는 바다모래 세척 시 밀도 변화를 평가하기 위하여 채취와 판매되는 현장조건의 바다모래에 대하여 함수비, 진밀도, 들밀도 그리고 모래 운반차량 직접 계근을 통한 밀도 분석을 수행하였다. 바지선과 덤프의 진밀도는 각각 평균 $2.666g/cm^3$$2.651g/cm^3$로 전체적으로 거의 유사하였다. 또한, 바지선과 덤프의 습윤밀도는 각각 평균 $1.716g/cm^3$$1.331g/cm^3$로 나타남으로써, 모래 1톤이 차지하는 부피로 환산할 경우 각각 $0.583m^3$$0.751m^3$로 평균 약 28.8% 정도의 부피변화가 수반되는 것으로 나타났다. 또한, 모래 운반차량을 직접 계근하여 측정된 출하 모래와 바지선 모래의 밀도는 각각 평균 $1.398g/cm^3$$1.716g/cm^3$로 분석되었는데, 이 값을 모래 1톤이 차지하는 부피로 환산하면 각각 $0.715m^3$$0.583m^3$로 바다모래 채취량과 판매량 간에 평균 약 22.6% 정도의 부피 변화가 수반되었음을 알 수 있었다.

Keywords

References

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