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Related Concept Videos

Shrinkage in Concrete01:27

Shrinkage in Concrete

Shrinkage in concrete is primarily due to water loss from evaporation, hydration of cement, or carbonation, leading to a reduction in volume. The volumetric contraction results in volumetric strain in concrete. However, in practice, shrinkage is measured as linear strain, which is one-third of the volumetric strain.
When concrete is still in its plastic state, it can undergo a decrease in volume by about 1% of its absolute volume. This decrease is known as plastic shrinkage. It arises either...
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A stress-strain diagram is a crucial tool that graphically displays a material's mechanical characteristics. This diagram is derived from a tensile test performed on a carefully prepared cylindrical specimen. The specimen has two gauge marks inscribed on its central part, and the distance between these marks is known as the gauge length. The cylindrical specimen is placed in a testing machine, which applies an increasing centric load. As this load grows, so does the gauge length. This change in...
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In designing structural elements and machine parts using ductile materials, it is crucial to ensure that these components withstand applied stresses without yielding. Yielding is initially determined through a tensile test, which evaluates the material's response to uniaxial stress. However, tensile stress is insufficient when components face biaxial or plane stress conditions This condition requires advanced criteria to predict failure.
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A material's elastic behavior is characterized by the disappearance of stress once the load is removed, allowing the material to return to its original state. However, when stress surpasses the yield point, yielding commences, marking the onset of plastic deformation or permanent set. This change from elastic to plastic behavior is influenced by the peak stress value and the duration before the load is removed. An intriguing observation occurs when a specimen is loaded, unloaded, and reloaded.
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Updated: Jun 20, 2026

A Cost-effective and Reliable Method to Predict Mechanical Stress in Single-use and Standard Pumps
07:34

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Published on: August 5, 2015

Shrinkage-based method for estimating suction stress characteristic curve.

Md Azizul Hoque1, Shahid Azam1

  • 1Environmental Systems Engineering, Faculty of Engineering and Applied Science, University of Regina, 3737 Wascana Parkway, Regina, SK, S4S 0A2, Canada.

Methodsx
|June 19, 2026
PubMed
Summary

A new shrinkage-based method estimates the suction stress characteristic curve (SSCC) for unsaturated soils. This approach overcomes limitations of existing methods, offering a more reliable way to understand soil behavior.

Keywords:
Shrinkage curveSuction stress characteristic curveUnsaturated soils

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Area of Science:

  • Geotechnical Engineering
  • Soil Mechanics
  • Unsaturated Soil Behavior

Background:

  • The suction stress characteristic curve (SSCC) is crucial for analyzing unsaturated soils.
  • Current methods for SSCC determination have limitations, including issues with low water content, non-uniform stress distribution, and complex parameter calibration.

Purpose of the Study:

  • To develop and validate a novel shrinkage-based method for estimating the SSCC.
  • To establish a relationship between volumetric strain and suction stress in soils.
  • To incorporate capillarity and absorption effects into this relationship.

Main Methods:

  • Developing a shrinkage-based approach using the soil shrinkage curve.
  • Establishing a mathematical relationship between volumetric strain and suction stress.
  • Integrating capillarity and absorption phenomena into the model.
  • Validating the proposed method against established models.

Main Results:

  • A new, reliable method for estimating the SSCC from the soil shrinkage curve.
  • The developed relationship effectively captures the behavior of unsaturated soils.
  • Successful incorporation of capillarity and absorption effects.

Conclusions:

  • The shrinkage-based method provides a viable alternative for determining the SSCC.
  • This method addresses shortcomings of existing techniques, particularly at low water contents.
  • The findings enhance the understanding of unsaturated soil mechanics and behavior.