Using ferromagnetism in reinforced concrete

In summary, the conversation discusses the idea of adding ferromagnetic particles to concrete to enhance the adherence between structural steel and concrete in reinforced concrete design. While the magnetic forces may be small in comparison to the structural strength, it is suggested that they could potentially help the concrete bond with the steel before hardening. However, it is uncertain if this would actually improve adherence.
  • #1
Semkan
4
0
Hey there,

I am currently majoring in civil engineering. A while ago when I was wondering about ferromagnetism an idea occurred to me:

In reinforced concrete design adherence between structural steel and concrete is a very important feature. Simply, if we could enhance the adherence, this would lead an increase in strenght.

My idea is, what if we add ferromagnetic particles to the concrete mixture and somehow magnetise the structural steel while the concrete is still in a liquid form. Is this possible? Do you think this would enhance the adherence between steel and the concrete? Or else what do you think would happen?
 
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  • #2
Magnetic forces are tiny compared to the structural strength of reinforced concrete and its components.
 
  • #3
mfb said:
Magnetic forces are tiny compared to the structural strength of reinforced concrete and its components.

Of course they are, when the concrete gets hardened the forces generated by magnetism would be negligable. But before the concrete gets hardened, when it's still in a liquid form wouldn't those magnetic forces help the concrete to better converge with the structural steel, ultimately increasing the adherence after the concrete gets hardened?
 
  • #4
Ah, that way.
Would surprise me, but I cannot rule it out.
 

1. What is ferromagnetism and how is it used in reinforced concrete?

Ferromagnetism is a property of certain materials that allows them to become strongly magnetized when exposed to a magnetic field. In reinforced concrete, small particles of ferromagnetic materials, such as iron oxide, are added during the mixing process. When a magnetic field is applied, these particles align themselves with the field, creating a strong bond between the concrete and any steel reinforcement within it.

2. What are the benefits of using ferromagnetism in reinforced concrete?

The use of ferromagnetic materials in reinforced concrete offers several benefits. It can increase the strength and durability of the concrete, as well as improve its resistance to corrosion. It also allows for easier and more precise detection of any cracks or damage within the concrete, making it easier to address maintenance and repair needs.

3. Are there any limitations or drawbacks to using ferromagnetism in reinforced concrete?

While the use of ferromagnetic materials in reinforced concrete has numerous benefits, there are also some limitations and drawbacks. One major limitation is that the presence of these materials can interfere with certain types of electrical equipment, making it difficult to use in areas where sensitive equipment is present. Additionally, the use of ferromagnetism may increase the overall cost of the concrete due to the added materials and specialized mixing processes.

4. How does the strength of reinforced concrete with ferromagnetic materials compare to traditional reinforced concrete?

The addition of ferromagnetic materials can significantly increase the strength and durability of reinforced concrete. Studies have shown that incorporating these materials can increase the compressive strength of concrete by up to 17%, and the flexural strength by up to 20%. This makes it a valuable tool for strengthening structures and improving their resistance to external forces.

5. What are some potential applications of using ferromagnetism in reinforced concrete?

The use of ferromagnetic materials in reinforced concrete has a wide range of potential applications. It can be used in the construction of bridges, buildings, and other structures to increase their strength and durability. It can also be used in the repair and retrofitting of existing structures to improve their structural integrity. Additionally, the ability to detect cracks and damage in reinforced concrete using magnetic imaging techniques makes it useful for monitoring the health and maintenance needs of structures over time.

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