Hello.

I like slightly unconventional solutions and am thinking of making a kitchen countertop out of asphalt since most of my new kitchen is black.

I've figured out most of it and consulted with a guy who has worked with a paving machine. He says it's entirely possible if I manage to get stability in the countertop; I plan to have a 3 mm sheet metal underneath so the board doesn't flex. I will also bevel the edges to minimize stone loss. The asphalt I will use is real "road asphalt".

What I haven't figured out is how to get a smooth surface on the counter. Somehow I need to varnish the counter, but since asphalt is coarse in structure, simply brushing on some varnish won't suffice. I'm thinking of pouring something that will spread over the counter and harden (like self-leveling compound). At the same time, it needs to have a hard surface, be completely transparent, and not discolor.

Is there liquid plastic in a can or something similar? Other suggestions?

Regards
 
Maybe you can scrub the asphalt as you lay it out. Maybe it can become smooth enough?
 
No answer to the question but the first thing that comes to mind is the smell of asphalt, how are you going to get rid of it?
 
I would guess some epoxy solution to "cast" the asphalt.
 
Regular epoxy yellows anyway.
 
Epoxy as filler with a UV-protective lacquer layer, expensive and it doesn't withstand heat or direct major wear. Possibly if a two-component lacquer can be more durable. Expensive though depending on the length of the bench.
 
janwide
Maybe a durable glass panel on top?
 
Gluing a glass pane with epoxy might be a smart solution, scratch and heat resistance, provides UV protection, and if the job is done well, a completely transparent surface.
 
I would love to see you post some video clips of the manufacturing...

The asphalt can be up to 180 degrees when loading onto the plants... Not something you want to get on yourself... Another thought is how you are going to get home with so little asphalt? It has to be transported so that the temperature stays, and without sticking to the bed or similar...
But that can probably be solved anyway...

Try to choose an asphalt type that contains as small stones as possible... There are a lot of different types of asphalt...
 
Isn't asphalt quite hazardous to health? You should probably check this out before you make your bench so that the bench doesn't emit harmful gases for months-years afterwards...
 
Bitumen is said to be carcinogenic, yes, there is a form they call bitumencancer. Absolutely nothing I would use indoors.
 
Asphalt would have looked awesome. But if it's a health hazard, it's not something to gamble with? Great idea though.

Black gravel with a glass sheet on top then? Maybe that's an option?
 
3mm sheet metal is quite flimsy if it lacks support, so make sure to have base cabinets.
 
carlbanan said:
The asphalt can be up to 180 degrees..
Icopal has cold asphalt in a bucket. Very convenient.
 
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