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PostPosted: Tue Jul 31, 2018 2:20 pm 
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Over the past year I have been researching and developing my own
top down all green method of production for few layer graphene flake / powder and
am now trying to identify viable business opportunities with the material.

A couple of idea's spring to mind but what sounds fantastic to me
may not necessarily translate the way I would want it to in the real
world so I was hoping for opinion's from trades people.

Graphene has been measured at 200 times the strength of steel
although strength would be highly variable though nevertheless
very good in compositions with other materials, it also has the
added benefit of being hydrophobic or hydrophilic depending
on what is desired.

How does a considerably stronger cement capable of repelling water
therefore reducing weathering sound?


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PostPosted: Tue Jul 31, 2018 7:15 pm 
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Cement? Hmmm. In many ways concrete is a phenomenal material - it is capable of carrying heavy loads and when modified by the addition of reinforcing bars it can be used to build massive, self-supporting structures. Concrete dams, water and sewer pipes, slab roads, pavements, etc are testimony to the fact that concrete is relatively impermeable - water does not usually penetrate significantly because of concrete's low permeability - and you can increase that by adding various admixtures or using tanking coatings relatively cheaply. In order to get into that market, though, you'll need very deep pockets as the testing of any new material is long drawn out and expensive.

Where you may have better luck is with flooring cement screeds - mixtures of cement and sand - where current crack-proofing favours the addition of polyethylene or nylon fibres to the screed in otrder to increase load capacity and decrease the tendency to crack in service. Having an alternative which would do the same, but without the negative effect of introducing plastic micro fibres into the environment as a result of the dumping of excess materials from construction, or as a result of the demolition of the building at a later date (as happens to almost all buildings) might well enable you to sell your material as being "greener"

First thoughts only - just off the top of my head

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PostPosted: Tue Jul 31, 2018 7:59 pm 
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That's really good information thanks a lot.

I gather then with flooring tiles and such, the primary reason for cracking along the screed is going to be largely to do with
differential loading and for me to prove that a graphene additive can solve the problem would require some kind of loading
test on tile samples to see what cracks first, the standard screed vs the screed with graphene additive.

That's very interesting and worth thinking about.


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