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Could pre-stressed graphene be used to reinforce granite block construction?

Engineering Asked by Dev Slocum on September 4, 2021

I am curious whether this will become an option, especially for longer lasting structures. Could pre-stressed graphene or another high tensile strength material by used to reinforce granite block construction?

Potentially relevant values:

Thermal Expansion Coeffiecients:
granite 7.9−8.4⋅10−6 m/mK,
graphene: it has a negative thermal expansion value

Compressive Strengths:
concrete: ~40 MPa
granite: ~200 MPa

Tensile Strengths:
Rebar: 420 MPa
Graphene: 130.5 GPa

Please note I am not certain of these values.

3 Answers

I think you're better off using a carbon fiber wrapped into a rod and impregnated with epoxy. That's more practical and cost effective than graphene.

Answered by TechDroid on September 4, 2021

I think so. The simplest example I can think of is this: You take a beam of granite and glue (potentially pre-stressed) graphene to the side that will be under tension in your building. If the beam spans between two coloumns, you would reinforce the underside. If it cantilevers out of a wall, the top.

Now there's several questions here that I can't answer:

  • will you need to pre-stress the graphene?
  • Can you actually securely glue graphene to granite?
  • Is there any case where such a construction is superior to reinforced concrete?

Answered by mart on September 4, 2021

Graphene is still a material with research into it's applications being investigated. What bonding agents and how it would be used into what material, like fibers, bars, etc.

Answered by LazyReader on September 4, 2021

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