Results 111 to 120 of about 408 (144)

Soil water diffusivity as function of the pore size distribution and precompression stress

Soil and Tillage Research, 2023
Steffen Beck-Broichsitter, Anneka Mordhorst, Heiner Fleige   +2 more
exaly   +2 more sources

Determination of precompression stress from uniaxial compression tests

Soil and Tillage Research, 2008
Abstract Soil compaction has been studied for many years due to its implications for crop yield. In addition, precompression stress is important tool in evaluating soil load capacity and its implications for soil structure. This study evaluated whether precompression stress fitted by different methods gave rise to different results when a wide range ...
Alvaro Pires da Silva, Thomas Keller, J Arvidsson   +2 more
exaly   +2 more sources

Calculation of the compression index and precompression stress from soil compression test data

Soil and Tillage Research, 2006
Abstract When compressing soil, there is a characteristic relationship between compressive stress and volume change that can be used to define important soil mechanical properties. Two defining features can be determined – the compression index (Cc – the modulus of the slope of the linear virgin compression curve) and the precompression stress (
A P Whitmore, W R Whalley, P D Hallett   +2 more
exaly   +2 more sources

A Novel Method for Estimating Soil Precompression Stress from Uniaxial Confined Compression Tests

Soil Science Society of America Journal, 2017
Core Ideas A new numerical method could detect the point of maximum curvature in the stress–strain relationship.
Rodrigo Labouriau, Per Schjønning, Mathieu Lamandé   +2 more
exaly   +4 more sources

In Situ Subsoil Stress-Strain Behavior in Relation to Soil Precompression Stress

Soil Science, 2012
Soil compaction negatively influences many important soil functions, including crop growth. Compaction occurs when the applied stress, R, overcomes the soil strength. Soil strength in relation to com- paction is typically expressed by the soil precompression stress, Rpc. Deformation is assumed to be elastic and reversible as long as R e Rpc.
Keller, T, Arvidsson, J, Schjønning, Per; id_orcid 0000-0002-9362-1003, Lamandé, Mathieu; id_orcid 0000-0003-4211-9395, Stettler, M, Weisskopf, P   +5 more
openaire   +1 more source

Assessing the coupling effects of nanosized fly ash and precompression stress towards mitigating subgrade cracks mobilised by traffic loading

Nanotechnology for Environmental Engineering, 2021
This study is focused on the application of nanotechnology and applied confined pressure to reduce subgrade cracking under traffic loading. At stage one, the expansive subgrade was treated with varying percentages of 0%, 5%, 15%, and 25% of nanosized fly ash (NFA), coupled with confined precompression stresses of 10 kPa and 20 kPa, 12 h after the ...
Mohamed Mostafa, Aneke Frank
exaly   +2 more sources

Functional evaluation of the various calculation methods for precompression stress

Soil Use and Management, 2019
Abstract Precompression stress ( σ p ) is commonly used as an indicator for the load carrying capacity of a soil and its stress history. Several calculation methods have been proposed to determine
Jan De Pue, Gemmina Di Emidio, Adam Bezuijen, Wim M. Cornelis   +3 more
openaire   +1 more source

Determination method and strain-attribute interact in the calculation of precompression stress from soil compression curves

Biosystems Engineering, 2021
Determination of soil precompression stress (σp) from compression curves has markedly changed in recent decades, with several available methods of varying complexity. The graphical procedure proposed more than eight decades ago remains a standard, though it is now emulated by statistical and numerical procedures.
Tassinari, Diego, Dias Junior, Moacir de S., Silva, Bruno M., Oliveira, Geraldo C. de, Carvalho, Teotonio S. de, Severiano, Eduardo da C., Rocha, Wellington W.   +6 more
openaire   +1 more source

Variance of mechanical precompression stress in graphic estimations using the Casagrande method and derived mathematical models

Soil and Tillage Research, 2010
Abstract Mechanical precompression stress is a yardstick for the strength and compressibility of soils. The default method for the estimation of precompression stress is the graphic method according to Casagrande. It involves a subjective perception by the engineer who not only determines the point of the highest curvature visually, but decides also ...
Olaf Christen, Jan Rucknagel
exaly   +2 more sources

Exploring the correspondence between precompression stress and soil load capacity in soil cores

Soil and Tillage Research, 2017
Abstract The soil precompression stress (σ p ) has been used as an estimator of the soil load bearing capacity, but a few researches have evaluated the correspondence to each other. In this study, we first evaluated in prepared soil cores the time needed for σ p to reach a quasi-stable state. Afterwards, we waited the same time for using another set
JOSÉ MIGUEL Reichert, André Somavilla, Dalvan Reinert   +2 more
exaly   +2 more sources