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Related Concept Videos

Drying Shrinkage01:21

Drying Shrinkage

When hardened concrete is exposed to air with a relative humidity of less than 100 percent, it begins to lose the free water within its capillaries. As this water evaporates, the water initially adsorbed onto the calcium silicate hydrates migrates towards these now empty spaces and eventually evaporates as well. Over time, as more water leaves, the volume of the concrete decreases, a phenomenon known as drying shrinkage.
A portion of this drying shrinkage can be reversed; if the concrete is...
Curing Methods01:26

Curing Methods

Concrete members with a small surface-to-volume ratio are cured by oiling and moistening the forms before casting the concrete member. These forms can be left in place for a prolonged period to prevent moisture loss, and can be wetted if made of a material suitable for wetting. If the forms are removed early, the concrete member is moistened and covered with polythene sheets to maintain moisture. For large horizontal concrete surfaces exposed to dry weather, a temporary covering is suspended...
Porosity and Absorption of Aggregate01:20

Porosity and Absorption of Aggregate

Aggregates contain pores of varying sizes; while some are completely enclosed within the particles, others open onto the surface, allowing water to penetrate. The porosity of aggregates is a major factor contributing to the overall porosity of concrete, given that aggregates constitute about three-quarters of concrete's volume.
When all pores in an aggregate are filled with water, the aggregate is considered saturated and surface-dry. If left in dry air, water will evaporate until the aggregate...
Preparation of Samples for Electron Microscopy01:20

Preparation of Samples for Electron Microscopy

To be visualized by an electron microscope, either transmission or scanning, biological samples need to be fixed (stabilized) so the electron beam does not destroy them and dried thoroughly (desiccated/dehydrated) so the vacuum does not affect them. Fixation needs to be done as quickly as possible because the sample properties will start changing as soon as it is removed from its natural environment. For example, in a tissue sample, the oxygen levels begin decreasing, causing an altered...

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Updated: Jun 5, 2026

Exploring the Effects of Atmospheric Forcings on Evaporation: Experimental Integration of the Atmospheric Boundary Layer and Shallow Subsurface
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Drying of a model soil.

P Faure1, P Coussot

  • 1Laboratoire Navier, Université Paris-Est, Champs sur Marne, France.

Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
|January 15, 2011
PubMed
Summary
This summary is machine-generated.

Soil drying behavior depends on paste structure, influencing drying rates and processes. Understanding these characteristics helps in developing methods to slow down soil drying.

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Area of Science:

  • Geotechnical Engineering
  • Soil Science
  • Materials Science

Background:

  • Soil drying is a critical process in various fields, including agriculture, construction, and environmental science.
  • Understanding the physical mechanisms governing soil drying is essential for predicting and controlling its behavior.

Purpose of the Study:

  • To investigate the influence of paste structure on soil drying characteristics.
  • To elucidate the physical origins of different drying periods (constant-rate and falling-rate).
  • To identify practical methods for mitigating soil drying rates.

Main Methods:

  • Model soils were prepared using different pastes within granular packings.
  • Magnetic Resonance Imaging (MRI) was employed to monitor water saturation distribution over time.
  • Drying curves were analyzed to characterize the constant-rate period (CRP) and falling-rate period (FRP).

Main Results:

  • Drying curves consistently showed a CRP and FRP, with durations varying based on paste composition.
  • Kaolin suspension exhibited a prolonged CRP with homogeneous drying.
  • Bentonite suspension showed a shorter CRP, with FRP dominated by fracture propagation.
  • Gel exhibited a very short CRP, with FRP characterized by a progressing dry front due to matrix shrinkage.

Conclusions:

  • The structure of the soil paste significantly dictates its drying behavior, affecting the duration of the constant-rate period and the mechanisms of water removal during the falling-rate period.
  • Different soil components (kaolin, bentonite, gel) lead to distinct drying processes, including homogeneous drying, fracture-induced drying, and shrinkage-driven drying.
  • The findings provide insights into controlling soil drying rates, offering practical strategies for applications where moisture management is crucial.