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Related Concept Videos

Abrasion Resistance of Concrete01:23

Abrasion Resistance of Concrete

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.
One such test is the revolving disc test, where three plates...
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...
Permeability of Concrete01:25

Permeability of Concrete

Permeability in the context of concrete refers to how easily liquids or gases can pass through the material. This quality is crucial for assessing the water-tightness and durability of concrete structures and their resistance to chemical attacks. Concrete permeability can be determined through comparative laboratory tests. These tests typically involve sealing a concrete specimen from the sides, applying water pressure to the top surface with pressure, and measuring the amount of water passing...
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...
Fatigue Strength of Concrete01:22

Fatigue Strength of Concrete

Fatigue, in the context of materials science and engineering, refers to the weakening or failure of a material caused by repeatedly applied loads, even if these loads are below the strength limit of the material. Fatigue strength in concrete is a critical property that influences its durability and longevity. Concrete can fail in two ways due to fatigue. Static fatigue or creep rupture occurs under a constant load or one that increases slowly. The other failure mode is due to cyclical or...
Additives and Fillers in Concrete01:29

Additives and Fillers in Concrete

Additives and fillers are integral to enhancing the properties of concrete. Pozzolans and blast-furnace slag are additives or admixtures due to their reactions with calcium hydroxide released during cement hydration. Fillers, which are finely ground and similar in fineness to Portland cement, improve concrete attributes such as workability density, and reduce capillary bleeding or cracking. Some fillers possess hydraulic properties or participate in benign reactions within the cement paste.
The...

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Related Experiment Video

Updated: May 14, 2026

Measurement of the Rheology of Crude Oil in Equilibrium with CO2 at Reservoir Conditions
10:38

Measurement of the Rheology of Crude Oil in Equilibrium with CO2 at Reservoir Conditions

Published on: June 6, 2017

Rheological Performance of Asphalt Modified with Coal-Oil Co-Processing Residue.

Ruofei Qi1, Jiuguang Geng1, Pengju Huo2

  • 1School of Materials Science and Engineering, Chang'an University, Xi'an 710018, China.

Materials (Basel, Switzerland)
|May 13, 2026
PubMed
Summary

Coal-oil co-processing residue (COCR) enhances asphalt performance at high temperatures, improving rutting resistance. Recommended at 10% for 90# asphalt in hot climates, it offers a sustainable modifier for road construction.

Keywords:
asphalt mixturecoal–oil co-processing residuemodified asphaltreaction mechanismrheological properties

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Determination of the Friction Coefficients of Icy Pavements Under Different Amounts of Snowfall
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Determination of the Friction Coefficients of Icy Pavements Under Different Amounts of Snowfall

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Last Updated: May 14, 2026

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Published on: January 6, 2023

Area of Science:

  • Materials Science
  • Civil Engineering
  • Chemical Engineering

Background:

  • High-temperature stability is crucial for asphalt pavement performance.
  • Resource utilization of byproducts like coal-oil co-processing residue (COCR) is an ongoing challenge.
  • Developing effective asphalt modifiers is essential for durable infrastructure.

Purpose of the Study:

  • To evaluate coal-oil co-processing residue (COCR) as a modifier for asphalt.
  • To assess the impact of COCR on asphalt's high-temperature performance and stability.
  • To understand the modification mechanisms of COCR in asphalt.

Main Methods:

  • Asphalt modification with varying COCR contents.
  • Performance testing: penetration, softening point, ductility, rheology, aging/storage.
  • Mechanism analysis: Fourier-transform infrared spectroscopy (FTIR), Gel permeation chromatography (GPC), SARA fractionation.

Main Results:

  • COCR significantly improved high-temperature performance (e.g., increased rutting factors).
  • Low-temperature performance was slightly reduced, but storage stability was good.
  • Increased asphaltene content confirmed COCR reinforced asphalt's colloidal structure, enhancing deformation resistance.
  • COCR addition to asphalt mixtures notably increased dynamic stability.

Conclusions:

  • COCR is a viable modifier for enhancing asphalt's high-temperature stability and resistance to permanent deformation.
  • A 10% COCR content in 90# base asphalt is recommended for optimal performance balance in hot climates.
  • COCR offers a promising avenue for resource utilization and improved asphalt performance.