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Related Concept Videos

Behavior of Concrete Under Compressive Load01:23

Behavior of Concrete Under Compressive Load

Concrete exhibits specific behaviors under different compressive loads. Understanding this is crucial for understanding its structural integrity. When concrete undergoes uniaxial compression, it tends to develop cracks that run parallel to the direction of the force. These parallel cracks stem from localized tensile stresses that occur perpendicular to the compression direction. Additionally, angled cracks may appear due to the formation of shear planes.
As the concrete specimen fractures under...
Microcracking in Concrete01:20

Microcracking in Concrete

Microcracking in concrete refers to the tiny cracks that can form within the material even before any external load is applied. These microcracks typically occur at the interface between the coarse aggregate and the hydrated cement paste, often as a result of differential volume changes prompted by variations in stress-strain behavior, as well as thermal and moisture movement. Initially, these microcracks remain stable and do not grow substantially until the concrete is stressed to about 30...
Creep in Concrete01:22

Creep in Concrete

Creep refers to the time-dependent increase in strain under a sustained load, excluding other time-dependent deformations associated with shrinkage, swelling, and thermal expansion in concrete. The primary mechanism behind creep involves the loss of physically adsorbed water from the calcium silicate hydrate within the hydrated cement paste. This process is further exacerbated by concrete's non-linear stress-strain relationship, microcrack development in the interfacial transition zone, and...
Dynamic Modulus of Elasticity of Concrete01:16

Dynamic Modulus of Elasticity of Concrete

The dynamic modulus of elasticity assesses how a concrete structure deforms under impact or dynamic loads. It is typically higher than the static modulus of elasticity, measured under slow, steady loading conditions.
The sonic test is a common method to determine the dynamic modulus. In this test, a concrete beam, sized either 6 x 6 x 30 inches or 4 x 4 x 20 inches, is clamped at its center. Vibrations are initiated at one end of the beam by an electromagnetic exciter unit powered by a...
Moisture Content and Bulking of Aggregate01:10

Moisture Content and Bulking of Aggregate

The moisture content of aggregates is a crucial factor in construction, particularly in concrete mixing, as it influences the total water required in the mix. Moisture content represents the water coated on the exterior surface of the aggregate existing in a saturated and surface-dry condition. The total water content of a moist aggregate is the sum of its moisture content and water absorption.
When aggregates are exposed to rain or sit in stockpiles, they absorb moisture, which must be...
Porosity in Cement Paste01:18

Porosity in Cement Paste

The porosity of concrete is a measure of the void spaces within its structure. These spaces impact its strength and durability significantly. When water and cement interact, a chemical reaction called hydration creates a semi-solid paste. This paste includes combined water, making up approximately 23% of the cement's dry mass, and gel water, which fills minuscule voids known as gel pores, accounting for about 28% of the cement gel volume.
The balance of water to cement in the mix is critical—it...

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Related Experiment Video

Updated: Jun 26, 2026

Stress Distribution During Cold Compression of Rocks and Mineral Aggregates Using Synchrotron-based X-Ray Diffraction
10:36

Stress Distribution During Cold Compression of Rocks and Mineral Aggregates Using Synchrotron-based X-Ray Diffraction

Published on: May 20, 2018

Study on microstructural evolution of soft clay under one-dimensional consolidation.

Dengheng Zheng1,2, Jijie Du3,4, Xiaoyu Deng1

  • 1Guangzhou Railway Polytechnic, Guangzhou, 511300, China.

Scientific Reports
|June 24, 2026
PubMed
Summary

This study reveals how marine soft clay

Keywords:
Discrete element methodMicrostructural evolutionOne-dimensional consolidationSoft clayX-ray micro-computed tomography

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Visualization of Failure and the Associated Grain-Scale Mechanical Behavior of Granular Soils under Shear using Synchrotron X-Ray Micro-Tomography
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Determination of Aggregate Surface Morphology at the Interfacial Transition Zone (ITZ)
08:59

Determination of Aggregate Surface Morphology at the Interfacial Transition Zone (ITZ)

Published on: December 16, 2019

Related Experiment Videos

Last Updated: Jun 26, 2026

Stress Distribution During Cold Compression of Rocks and Mineral Aggregates Using Synchrotron-based X-Ray Diffraction
10:36

Stress Distribution During Cold Compression of Rocks and Mineral Aggregates Using Synchrotron-based X-Ray Diffraction

Published on: May 20, 2018

Visualization of Failure and the Associated Grain-Scale Mechanical Behavior of Granular Soils under Shear using Synchrotron X-Ray Micro-Tomography
09:00

Visualization of Failure and the Associated Grain-Scale Mechanical Behavior of Granular Soils under Shear using Synchrotron X-Ray Micro-Tomography

Published on: September 29, 2019

Determination of Aggregate Surface Morphology at the Interfacial Transition Zone (ITZ)
08:59

Determination of Aggregate Surface Morphology at the Interfacial Transition Zone (ITZ)

Published on: December 16, 2019

Area of Science:

  • Geotechnical Engineering
  • Soil Mechanics
  • Materials Science

Background:

  • Marine soft clay in Daya Bay presents significant geotechnical challenges due to high sensitivity and low shear strength.
  • Understanding the microstructural and mechanical behavior of this clay under consolidation is crucial for infrastructure development.

Purpose of the Study:

  • To investigate the microstructural evolution and mechanical mechanisms of Daya Bay marine soft clay during one-dimensional consolidation.
  • To establish a quantitative link between microstructural changes and macroscopic mechanical responses.

Main Methods:

  • A multi-scale approach combining Mercury Intrusion Porosimetry (MIP), dual-energy synchrotron X-ray Micro-Computed Tomography (Micro-CT), and Discrete Element Method (DEM) simulations.
  • Analysis of pore size distribution, macropore connectivity, particle coordination number, and contact-sliding ratio.

Main Results:

  • One-dimensional consolidation shifted pore size distribution from bimodal to unimodal, destroying macropore connectivity.
  • Two structural yield stresses (62 kPa and 676 kPa) were identified, indicating aggregate rearrangement and intra-aggregate compression.
  • Increased consolidation pressure enhanced clay skeleton stability by increasing particle coordination and reducing sliding.

Conclusions:

  • The study provides a mechanistic understanding of soft clay behavior under consolidation.
  • Findings offer a basis for improved settlement prediction and ground improvement designs in coastal geotechnical projects.