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International Journal of Soil Science
  Year: 2010 | Volume: 5 | Issue: 2 | Page No.: 62-72
DOI: 10.3923/ijss.2010.62.72
 
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Structural Development of Clay Soil with the Amendment of Coal Combustion By-product FGD Gypsum in Lusatia Germany

S. Narra

Abstract:
The objective of this study is to investigate the development of clay soil structure with the amendment of Flue Gas Desulphurization (FGD) gypsum as a substitute for lime in Lusatia, Germany. Development of the clayey soil structure has been evaluated using parameters shear stress and penetration resistance. The sand-clay mixtures (65% sand-35% clay) representatives to the field conditions were subjected to undergo 1, 5, 10 and 20 drainage cycles (swelling and shrinking processes). Shear lines were established based on 12 load stages using box shear machine. Penetration resistance has been accomplished using modified penetrometer. Shear lines distinguished a new structure development with good crystal growth after 10 drainage cycles with FGD gypsum, where as with lime the clayey soil was rather lubricative. Penetration resistance decreased from 30 to 5 MPa with FGD gypsum amendment where as with lime amendment it reduced to 10 MPa only. From water retention characteristics it could be observed that samples were well drained indicating reduction in water holding capacity of clay due to amelioration achieved by FGD gypsum. Observations showed that FGD gypsum is more effective in amelioration compared to lime.
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How to cite this article:

S. Narra , 2010. Structural Development of Clay Soil with the Amendment of Coal Combustion By-product FGD Gypsum in Lusatia Germany. International Journal of Soil Science, 5: 62-72.

DOI: 10.3923/ijss.2010.62.72

URL: https://scialert.net/abstract/?doi=ijss.2010.62.72

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