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Impact of Plate Diameter and Sample Height on the Determined Pre-Compaction Value

Impact of Plate Diameter and Sample Height on the Determined Pre-Compaction Value AbstractThe objective of the paper was to verify previously obtained results of research on the impact of the plate diameter on the determined value of pre-compaction stress of soil (NG) with a wider selection of dimensions of samples. Tests were carried out on samples with a diameter (D) of 100 mm and heights (H) of 30, 50 or 100 mm produced from the soil material (M) or collected (NNS) from subsoil with the granulation group of: silt loam, loam, sandy loam, sandy clay loam. The following soil properties were determined: granulation type, density of the solid phase, content of humus and calcium carbonate, reaction, plastic and liquid limit. Properties of samples were described with moisture, dry density of solid particles, porosity of aeration, degree of plasticity and saturation. Samples were loaded with plates of varied diameters. The NG value was calculated with the method of searching for the crossing point of tangents with the secondary stress curve and the virgin stresses curve (a traditional method). It was stated that the plate diameter (d) and sample height (H) do not influence the measurement results when the relation d/D is within 0.5 ≤ d/D ≤ 0.8 and the ratio D/H equals 2. It is possible to omit the condition d/D in a situation when soil is low cohesive and its degree of moisture is ca. 0.41-0.44. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Agricultural Engineering de Gruyter

Impact of Plate Diameter and Sample Height on the Determined Pre-Compaction Value

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Publisher
de Gruyter
Copyright
© 2017
ISSN
0567-8315
eISSN
2449-5999
DOI
10.1515/agriceng-2017-0002
Publisher site
See Article on Publisher Site

Abstract

AbstractThe objective of the paper was to verify previously obtained results of research on the impact of the plate diameter on the determined value of pre-compaction stress of soil (NG) with a wider selection of dimensions of samples. Tests were carried out on samples with a diameter (D) of 100 mm and heights (H) of 30, 50 or 100 mm produced from the soil material (M) or collected (NNS) from subsoil with the granulation group of: silt loam, loam, sandy loam, sandy clay loam. The following soil properties were determined: granulation type, density of the solid phase, content of humus and calcium carbonate, reaction, plastic and liquid limit. Properties of samples were described with moisture, dry density of solid particles, porosity of aeration, degree of plasticity and saturation. Samples were loaded with plates of varied diameters. The NG value was calculated with the method of searching for the crossing point of tangents with the secondary stress curve and the virgin stresses curve (a traditional method). It was stated that the plate diameter (d) and sample height (H) do not influence the measurement results when the relation d/D is within 0.5 ≤ d/D ≤ 0.8 and the ratio D/H equals 2. It is possible to omit the condition d/D in a situation when soil is low cohesive and its degree of moisture is ca. 0.41-0.44.

Journal

Agricultural Engineering – de Gruyter

Published: Mar 1, 2017

References

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    Błażejczak
  • Comparisons of different procedures of pre - compaction stress determination on weakly structured soils
    Mosaddeghi
  • A method for soil compactibility determination
    Koolen
  • The Impact of the Plate Diameter on the Determined Value of the Pre - Compaction Stress in soils with varied textural group
    Błażejczak
  • The Impact of the Plate Diameter on the Determined Value of the Pre - Compaction Stress of Samples made of Silt Soil
    Błażejczak
  • Procedure on Indicated Values of Soil Precompaction Stress Proceedings of th Triennial Conference of International Soil Tillage for Sustainability The University of Queensland Brisbane
    Dawidowski
  • Assessment of the behaviour of field soils during compression
    Earl
  • Zarys geotechniki s
    Wiłun
  • A method for assessing the impact of load on mechanical stability and on physical properties of soils Soil
    Horn