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Related Concept Videos

Shape and Texture of Coarse Aggregate01:25

Shape and Texture of Coarse Aggregate

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Aggregate shape is classified based on the relative sharpness or roundness of the edges and corners. This classification includes categories like rounded, angular, elongated, and flaky, each with specific characteristics. Rounded aggregates, fully shaped by attrition, are typical of river or seashore gravel, while angular aggregates, such as crushed rock, have well-defined edges. Aggregates that are elongated and flaky are less desirable, as they can reduce the workability and strength of...
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Microcracking in Concrete01:20

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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...
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Porosity and Absorption of Aggregate01:20

Porosity and Absorption of Aggregate

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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.
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Unsoundness of Aggregate due to Volume Change01:26

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Unsoundness in aggregates due to volume changes is primarily caused by the physical alterations aggregates undergo, such as freezing and thawing, thermal changes, and wetting and drying. Unsound aggregates, when subjected to these changes, result in volume change upon disintegration. This, in turn, contributes to the deterioration of concrete, including scaling, pop-outs, and cracking. Particular types of aggregates, such as porous flints, cherts, and those containing clay minerals, are...
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Abrasion Resistance of Concrete01:23

Abrasion Resistance of Concrete

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Abrasion resistance is an essential characteristic of concrete that determines its durability and longevity under various wear conditions. Concrete surfaces are vulnerable to different types of abrasion. For instance, surfaces may wear down due to the constant movement of vehicles or be eroded by solids carried in water, as seen in concrete canal linings. Specific tests are conducted to measure the abrasion resistance of concrete.
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Toughness and Hardness of Aggregate01:22

Toughness and Hardness of Aggregate

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Toughness and hardness are critical properties of aggregate materials used in concrete, particularly on pavement surfaces and industrial flooring subjected to heavy loads. Toughness is defined as the aggregate's resistance to failure by impact and is measured by the aggregate impact value (AIV). For this, the aggregate impact value test is performed, wherein the impact is delivered by a standard hammer, which falls freely under its own weight onto the aggregates. The aggregates fragment in...
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Related Experiment Video

Updated: Nov 27, 2025

Advanced Self-Healing Asphalt Reinforced by Graphene Structures: An Atomistic Insight
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Study on Asphalt Pavement Surface Texture Degradation Using 3-D Image Processing Techniques and Entropy Theory.

Yinghao Miao1,2, Jiaqi Wu1, Yue Hou1

  • 1Beijing Key Laboratory of Traffic Engineering, Beijing University of Technology, 100 Pingleyuan, Chaoyang District, Beijing 100124, China.

Entropy (Basel, Switzerland)
|December 3, 2020
PubMed
Summary

Entropy theory effectively evaluates asphalt pavement surface texture decay, offering better insights into anti-skid performance than traditional methods. This research highlights texture complexity and its correlation with road safety.

Keywords:
3-D digital imagingdecay trendentropymacrotexturepavement

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Area of Science:

  • Civil Engineering
  • Materials Science
  • Transportation Engineering

Background:

  • Road surface texture is crucial for pavement anti-skid performance.
  • Understanding texture decay over time is essential for maintaining road safety.
  • Traditional texture parameters may not fully capture complex surface characteristics.

Purpose of the Study:

  • To introduce and apply entropy theory for evaluating asphalt pavement surface texture decay.
  • To analyze the relationship between surface texture complexity, entropy, and anti-skid performance.
  • To investigate the influence of mixture design on macrotexture decay characteristics.

Main Methods:

  • Collected field test data on road surfaces over 2 years.
  • Applied entropy theory to analyze three-dimensional macrotexture and microtexture decay.
  • Correlated entropy values with pavement anti-skid performance and traditional parameters like Mean Texture Depth (MTD).

Main Results:

  • Entropy is a feasible method for evaluating asphalt pavement macrotexture and microtexture.
  • Higher entropy indicates greater texture complexity; entropy decreases with vehicle load polishing.
  • Surface texture decay varies significantly with different asphalt mixture designs.
  • Entropy shows a stronger correlation with anti-skid performance than MTD.

Conclusions:

  • Entropy theory provides a more comprehensive understanding of asphalt pavement surface texture and its evolution.
  • Optimizing mixture designs can enhance macrotexture decay performance and improve pavement longevity.
  • Entropy offers significant advantages over traditional parameters for assessing anti-skid properties.