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Mineralogical and Physico-chemical Properties of Fine fractions Remained after Crushed Sand Manufacture  

Yoo, Jang-Han (Geology and Geoinformation Division, Korea Institute of Geoscience and Mineral Resources)
Ahn, Gi-Oh (Geology and Geoinformation Division, Korea Institute of Geoscience and Mineral Resources)
Jang, Jun-Young (Sampyo Ind. Ltd.)
Publication Information
Journal of the Mineralogical Society of Korea / v.19, no.4, 2006 , pp. 355-361 More about this Journal
Abstract
Artificially crushed sands occupy approximately 30 percent of the total consumption in South Korea. The demand for the crushed sands is expected to rise in the future. Most manufacturers use granitic rocks to produce the crushed sands. During the manufacturing process, fine fractions (i.e., sludges or particles smaller than 63 microns) are removed through the process of flocculation. The fine fraction occupies about 15% of the total weight. The sludges are comprised of quartz, feldspars, calcite, and various kinds of clay minerals. Non-clay minerals occupy more than 75 percent of the sluges weight, according to the XRD semi-quantification measurement. Micas, kaolinites, chlorite, vermiculite, and smectites occur as minor constituents. The sludges from Jurassic granites contain more kaolinites and $14{\AA}$-types than those from the Cretaceous ones. The chemical analysis clearly shows the difference between the parent rocks and the sludges in chemical compositions. Much of colored components in the sludges was accumulated as the weathering products. Particle size analysis results show that the sludges can be categorized as silt loam in a sand-silt-clay triangular diagram. This result was for her confirmed by the hydraulic conductivity data. In South Korea, the sludges remained after crushed sand production are classified as an industrial waste because of their impermeability, and which is caused by their high silt and clay fractions.
Keywords
crushed sand; granite; granitic gneisse; sludge; flocculation agent; clay minerals; kaolinites; $14{\AA}$ minerals (chlorite/vermiculite); smectite; Jurassic;
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Times Cited By KSCI : 1  (Citation Analysis)
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1 Boeker, E. and van Grondelle, R. (1995) Environmental physics, John Wiley & Sons Ltd, Baffins Lane, Chichester, England
2 Brady, N.C. and Weil, R.R. (1996) The nature and properties of soils, Prentice Hall, Inc., New Jersey
3 Smith, K.A. and Mullins, C.E. (2001) Soil and Environmental analysis : physical methods, Marcel Dekker, Inc., New York
4 Tepordei, V.V. (2004) U. S. Geological Survey, Mineral Commodity Summaries, January 2004, pp. 156-157
5 박철환, 강선덕, 민정식, 신중호, 박찬, 정덕영(1998) 쇄석을 이용한 인공모래 개발연구(II). KR-98(C)-20, 한국자원연구소
6 정지곤, 서병민, 하성호, 이동원 (2006) 입도분석 및 변수두법을 이용한 교란사질 토양의 투수계수 측정. 한국지질공학회지, 제 16권 제 1 호, pp. 15-21   과학기술학회마을
7 Summers, W.K. and Weber, P.A. (1984) The relationship of grain-size distribution and hydraulic conductivity-An alternate approach, Ground water, Vol. 22, No. 4, p. 474-475   DOI
8 강선덕, 이동남 (1998) 암석 미분 폐스러지를 이용 하경량기포 콘크리트 제조에 관한 연구. 한국자원공학회. p. 264-269
9 Darcy, D.E. (1856) Les Fontaines publiques de la ville de Dijon. Paris: Dalmont