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Related Concept Videos

Frost Action on Concrete01:27

Frost Action on Concrete

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Concrete structures in cold climates, such as those along roadsides, can retain moisture. This moisture makes them susceptible to frost-related damage when temperatures fall below freezing. Adding moisture worsens the damage during temperature fluctuations, leading to repeated freezing and thawing. De-icing salts, spread over these structures to melt ice, add to the freeze-thaw cycle, and draw even more moisture into the concrete.
This freeze-thaw cycle primarily causes surface scaling, where...
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Frost Resistant Concrete01:29

Frost Resistant Concrete

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Concrete's susceptibility to frost damage during freeze-thaw cycles demands strategic measures to enhance its frost resistance. Employing techniques like air entrainment, adjusting the water-cement ratio, proper curing, and selecting appropriate aggregates are essential.
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From Water to Land
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Masonry in Cold and Hot Weather Conditions01:21

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In cold weather, masonry construction requires specific precautions to ensure mortar does not freeze before curing, as this can significantly weaken its strength and watertightness. Mortar temperature should be maintained between 60°F and 80°F to support proper hydration and curing. Below 40°F, mortar water must be heated, but should not exceed 120°F as high temperatures can reduce mortar's compressive and bond strength.
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Decreased Body Temperature01:29

Decreased Body Temperature

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A decreased body temperature can occur in patients with hypothermia and frostbite. Heat loss with extended cold exposure overpowers the body's ability to create heat, resulting in hypothermia. Core temperature readings help classify hypothermia. Mild hypothermia is temperatures between 32 °C (89.6 °F) and 35°C (95 °F) and is caused by impaired thermoregulation. Moderate hypothermia is temperatures between 28 C (82.4 °F) and 32 °C (89.6 °F) caused by...
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Responses to Heat and Cold Stress02:45

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Every organism has an optimum temperature range within which healthy growth and physiological functioning can occur. At the ends of this range, there will be a minimum and maximum temperature that interrupt biological processes.
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Related Experiment Video

Updated: Jun 17, 2025

Fabrication of Superhydrophobic Metal Surfaces for Anti-Icing Applications
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Fabrication of Superhydrophobic Metal Surfaces for Anti-Icing Applications

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Robust All-Day Frostphobic Surfaces.

Wei Ma1, Aleksandr A Sergeev2, Muhammad Bilal Asif1

  • 1Department of Mechanical and Aerospace Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR 999077, China.

ACS Applied Materials & Interfaces
|August 8, 2024
PubMed
Summary

This study introduces a novel V-grooved surface with superhydrophobic solar-thermal layers (VSSs) for effective all-day frost control. The VSS surface prevents frost buildup and enhances solar-thermal defrosting, ensuring durability in extreme environments.

Keywords:
all-day frostphobicrobustsolar-thermalspatial controlsuperhydrophobic

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Area of Science:

  • Materials Science
  • Surface Engineering
  • Nanotechnology

Background:

  • Frost formation on surfaces causes structural damage and reduces heat transfer efficiency.
  • Existing solar-thermal and superhydrophobic surfaces struggle with all-day frostphobicity due to nighttime frost accumulation and susceptibility to wear.
  • Nanostructured coatings often lack durability for long-term outdoor applications.

Purpose of the Study:

  • To develop an innovative frostphobic surface with robust all-day performance and durability.
  • To overcome the limitations of current solar-thermal antifrosting/defrosting technologies.
  • To create a surface capable of preventing frost accumulation and facilitating efficient solar-thermal defrosting.

Main Methods:

  • Fabrication of a novel surface incorporating V-grooved structures with superhydrophobic solar-thermal layers (VSSs).
  • Investigation of the VSS surface's ability to regulate vapor diffusion through out-of-plane gradient structures.
  • Evaluation of the enhanced photothermal effect and water repellency of the VSS surface.

Main Results:

  • The VSS surface prevents complete frost coverage overnight by facilitating spatially regulated vapor diffusion.
  • Enhanced photothermal effect and robust water repellency contribute to effective solar-thermal defrosting during daytime.
  • The VSS surface demonstrates exceptional durability and protection against wear and tear.

Conclusions:

  • The VSS surface offers a promising solution for robust all-day frostphobicity and efficient solar-thermal defrosting.
  • The innovative design ensures extended lifespan and reliable performance in extreme environments.
  • This technology has significant potential for practical applications requiring frost mitigation.