Journal of The Korean Society of Agricultural Engineers (한국농공학회논문집)

The Korean Society of Agricultural Engineers (한국농공학회)
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A Study on the Engineering and Environmental Characteristics of Phosphogypsum-Cement-Soil Mixtures

인산석고 시멘트 혼합토의 공학적.환경적 특성 연구

  • 장동수 (강원대학교 농업생명과학대학 지역건설공학과) ;
  • 연규석 (강원대학교 농업생명과학대학 지역건설공학과) ;
  • 김기성 (강원대학교 농업생명과학대학 지역건설공학과) ;
  • 하선효 (강원대학교 농업생명과학대학 지역건설공학과) ;
  • 김용성 (강원대학교 농업생명과학대학 지역건설공학과)
  • Received : 2011.04.22
  • Accepted : 2011.05.30
  • Published : 2011.05.31
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Abstract

This study aimed to investigate the engineering and environmental characteristics of phosphogypsum-cement-soil mixtures composed of phosphogypsum, soil, and a small amount of cement was analysed on the basis of the unconfined compression test, the tensile strength test, the freezing and thawing test, the wetting and drying test, SEM and EDS analysis, XRD analysis and Leaching test. The specimens were manufactured with soil, cement and phosphogypsum. The cement contents was 10 %, and the phosphogypsum contents was 10, 20, 30, and 40 % by the weight of total dry soil. Each specimen was manufactured after curing at constant temperature and humidity room for 3, 7 and 28 days, after which the engineering characteristics of phosphogypsum-cement-soil mixtures were investigated using the unconfined compression test, the tensile strength test, the freezing and thawing test, the wetting and drying test. The basic data were presented for the application of phosphogypsum-cement-soil mixtures as construction materials. To investigate the environmental characteristics, leaching test was performed and the leaching test results were far below than of regulatory requirement of Waste Management Act in Korea. Therefore the results show that phosphogypsum is environmentally safe and can be used as construction materials in environmental aspect.

Keywords

References

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