<abstract xmlns="http://www.w3.org/1999/xhtml"><p>The objective of the paper was to investigate the impact of the plate diameter on the value of the measured pre-compaction stress of soil. The investigations were carried out on model samples with 100 mm diameter and 30 mm height made of the silt loam and the percentage moisture content of 13.7 and 21.9%. The following properties of the used material were measured: the granulation group, density of solid particles, humus content, reaction, plastic and liquid limit and the degree of saturation of samples. The samples were loaded with a testing machine using plates with varied diameters: 20, 30, 50, 70, 80, 90, 96, 98 and 99 mm. The pre-compaction stress value was measured with the method of searching for the crossing point of tangents with the secondary stress curve and original stress curve (a classic method). It was found out that for samples with saturation amounting to 13.7% of the moisture content the pre-compaction stress does not significantly depend on the plate diameter. For samples with saturation amounting to 21.9% of the moisture content the pre-compaction stress may significantly depend on the plate diameter. Based on the obtained results a conclusion was made that in the research on the pre-compaction stress with the method of uni-axial deformations, the relation of the plate diameter (<italic>d</italic>) to the diameter of the cylinder (<italic>D</italic>) should be within 0.3 ≤ d/D &lt; 0.8.</p></abstract>

The objective of the paper was to investigate the impact of the plate diameter on the value of the measured pre-compaction stress of soil. The investigations were carried out on model samples with 100 mm diameter and 30 mm height made of the silt loam and the percentage moisture content of 13.7 and 21.9%. The following properties of the used material were measured: the granulation group, density of solid particles, humus content, reaction, plastic and liquid limit and the degree of saturation of samples. The samples were loaded with a testing machine using plates with varied diameters: 20, 30, 50, 70, 80, 90, 96, 98 and 99 mm. The pre-compaction stress value was measured with the method of searching for the crossing point of tangents with the secondary stress curve and original stress curve (a classic method). It was found out that for samples with saturation amounting to 13.7% of the moisture content the pre-compaction stress does not significantly depend on the plate diameter. For samples with saturation amounting to 21.9% of the moisture content the pre-compaction stress may significantly depend on the plate diameter. Based on the obtained results a conclusion was made that in the research on the pre-compaction stress with the method of uni-axial deformations, the relation of the plate diameter (d) to the diameter of the cylinder (D) should be within 0.3 ≤ d/D < 0.8.

The Impact of the Plate Diameter on the Determined Value of the Pre-Compaction Stress of Samples made of Silt Soil

Department of Construction and Usage of Technical Devices, West Pomeranian University of Technology in Szczecin

Agricultural Engineering

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

The objective of the paper was to investigate the impact of the plate diameter on the value of the measured pre-compaction stress of soil. The investigations...

The Impact of the Plate Diameter on the Determined Value of the Pre-Compaction Stress of Samples made of Silt Soil

Data publikacji: 02 sie 2016

Zakres stron: 5 - 14

Otrzymano: 01 gru 2015

Przyjęty: 01 sty 2016

DOI: https://doi.org/10.1515/agriceng-2016-0021

Słowa kluczowe
soil, pre-compaction stress, methodology, conditions of deformation

© 2016 Dariusz Błażejczak et al., published by De Gruyter Open

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

The Impact of the Plate Diameter on the Determined Value of the Pre-Compaction Stress of Samples made of Silt Soil

Data publikacji: 02 sie 2016

Zakres stron: 5 - 14

Otrzymano: 01 gru 2015

Przyjęty: 01 sty 2016

DOI: https://doi.org/10.1515/agriceng-2016-0021

Słowa kluczowesoil, pre-compaction stress, methodology, conditions of deformation

© 2016 Dariusz Błażejczak et al., published by De Gruyter Open

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Słowa kluczowe
soil, pre-compaction stress, methodology, conditions of deformation