Ultra High Strenght Bunker Concrete Beton Engine Making

[MustafaUmutSarac]

Hello there,

I have read tons of scientific papers on bunker concretes which made for heaviest air raid. If you read reactive concrete at google , you impress with their strenght.

For example , they make an wall with reactive concrete and explode c4 nearby and concrete as it is.

Well , I am starting new courses on 2d autocad design and solidworks design in coming 3 months.

I am thinking to design 1, 5, 25 HP diesel engines as motorcycle and boat engine. I want to produce the concrete molds and sell the concrete casts .

What do you advise ?

umut
istanbul

 

[MRA]

I think you might want to spend a bit of time in a concrete lab (I work in one, some of the time) getting to know the material. It's great stuff, but you wouldn't want to make an engine out of it

 

[MustafaUmutSarac]

Thank you , I think there might be some problems , please correct me,

reactive concrete loses its compressive strenght to 1/10 at 1000 celcius.
bending strenght is 1/10 of the compressive strenght.
I will try to find cooling and heating cycle strenght also.

I read , at 1960s , americans developed high heat concretes , there are reports out there in pdf google.

I am thinking may be high heat concrete and rpc concrete can be matched , is it possible ?

I am thinking also cast concrete on steel rod welded armature , it would be ferrocement.

I am thinking to put highest ratio steel fibers inside also for bending strenght.

these concretes withstands 60000 PSI or 200 Kpa.

At house building , it is max 5000 psi and at new york freedom tower , it is 12500 PSI.

What do you think MRA ?

Best,

umut

 

[MustafaUmutSarac]

I am thinking also put thick cast iron liners to cut the flame concrete relation.

 

[MRA]

>What do you think MRA ?

I think (in a nice way) you are nuts

Concrete is very heavy, good in compression and not good in bending. It's fatigue performance is also rather poor - we set up beams in our lab and cycle them until they crack, which of course they all do in the end. You could attempt to make the bits of an engine which might have once been made of cast iron, out of concrete - like a big plinth - but if you did, even that would shake itself apart in time.

I once used to design anti-vibration inertia blocks for big vibrating things out of concrete. It will handle vibration if the shape is very plain (a big block) but if there is more detail, bits will drop off.

Still, progress is never made unless by people prepared to make outlandish suggestions, so keep trying!

(Edit to add - wood is an amazing material in many ways. In our local science museum are some ancient, huge engineering lathes with wooden beds. And my Polish friends report motorbike engines with wooden replacement pistons during communist times when no spare parts were available - I think it was necessary to carry one or two spare on a journey!)

 

[MustafaUmutSarac]

wow , wooden parts...wow.

I read an article at science magazine this year and it was about a wood which is bulletproof and near to steel titanium specs.

Scientists boils the wood block in salt heavy water and when the wood is soft , press it %500.

the vains turns in to micro nano tubes and the wood turns in to a composite faraway better than carbon.

Now , I think I can use that wood to cnc the internals. Other thick outerskin could be made by glass reinforced polyester .
what do you think ?

thanks

umut