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The importance of volume changes in the determination of soil water retention curves on the East Slovakian Lowland

Kandra Branislav, Gomboš Milan

Journal of Water and Land Development

2020

no. 45

54--60

Estimation and application of water retention curves in heavy soils have own specifics. The reason for these specific properties is the composition of the high clay texture. This is manifested by volume changes of soil depending on moisture. Up to 40% change in the volume compared to the saturated state was recorded in the conditions of the East Slovakian Lowland. The results described in this work are based on research work carried out in the East Slovakian Lowland and represent an analysis of selected 42 samples out of a total of 250 samples in which laboratory measurements of soil water retention curves and volume changes were performed. Selected samples represent the localities Senné and Poľany. Volumetric changes were measured in a laboratory by measuring the dimensions of soil samples. Appropriate changes in the volume of soil samples should be measured when determining moisture retention curves. Neglecting this physical effect leads to a distorted determination of the water retention curves in heavy soils. In the laboratory measurement of water retention curves points, changes in the volume of the sample were measured in the range of 0.24–43.67% depending on the soil moisture potential during drainage. In the case of neglecting the effect of shrinkage during the drainage of samples, a certain error is occurring in the calculation of the volumetric moisture. The range of this error was 1–13% of volumetric moisture.

Skurcz gruntu - zjawisko groźne w uszczelnieniach mineralnych

Garbulewski K., Żakowicz S.

Inżynieria Morska i Geotechnika

2007

nr 2

86-91

Podstawy teoretyczne wyjaśniające mechanizm skurczu gruntu i metody określania parametrów skurczalności. Wyniki badań gruntów drobnoziarnistych (glin i iłów), używanych do budowy uszczelnień mineralnych. Zalecenia na potrzeby praktyki budownictwa składowisk odpadów komunalnych i przemysłowych.

Theoretical background explaining the mechanism of soil shrinkage and the methods for determination of shrinkage parameters. The results of tests on fine soils (silty clays and clays) used in construction of mineral sealing. Practical recommendations for construction of municipal and industrial waste landfills.