Autoclaved Concrete

Dan said:

In case you are interested:

http://www.cement.org/basics/concreteproducts_acc.asp

Thanks for lunch, it is always nice to see you guys.

Dan

Once a gain I have done the stupid thing and sent an email to a news
group - please ignore.

On Fri, 01 Dec 2006 10:54:34 -0800, Dan <[email hidden]>

Quoted message said:

Dan said:

In case you are interested:

http://www.cement.org/basics/concreteproducts_acc.asp

Thanks for lunch, it is always nice to see you guys.

Dan

Once a gain I have done the stupid thing and sent an email to a news
group - please ignore.

There we were looking for a bicycle application for aerated concrete;
maybe the guy who's still looking for a 23.4mm seatpost could make one
from it?

Kinky Cowboy*

*Batteries not included
May contain traces of nuts
Your milage may vary

Kinky Cowboy said:

On Fri, 01 Dec 2006 10:54:34 -0800, Dan <[email hidden]>

Quoted message said:

Dan said:

In case you are interested:

http://www.cement.org/basics/concreteproducts_acc.asp

Thanks for lunch, it is always nice to see you guys.

Dan

Once a gain I have done the stupid thing and sent an email to a news
group - please ignore.

There we were looking for a bicycle application for aerated concrete;

Well, this application immediately came to mind:

http://sheldonbrown.com/real-man.html

- Frank Krygowski

Quoted message said:

Kinky Cowboy said:

On Fri, 01 Dec 2006 10:54:34 -0800, Dan <[email hidden]>

Quoted message said:

Dan wrote:
> In case you are interested:
>
> http://www.cement.org/basics/concreteproducts_acc.asp
>
> Thanks for lunch, it is always nice to see you guys.
>
> Dan
Once a gain I have done the stupid thing and sent an email to a news
group - please ignore.

There we were looking for a bicycle application for aerated concrete;

Well, this application immediately came to mind:

http://sheldonbrown.com/real-man.html

- Frank Krygowski

I will point out that ACC weighs less per unit volume than carbon fiber
composite. Maybe the techno-geek bicycle folks will fall for it as the
newest thing in lightweight biking. And for the guy trying to braze up
his own frame, he can use his woodworking hand tools to shape an ACC frame.

"Dan" <[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

Quoted message said:

Kinky Cowboy said:

On Fri, 01 Dec 2006 10:54:34 -0800, Dan <[email hidden]>
wrote:

> Dan wrote:
>> In case you are interested:
>>
>> http://www.cement.org/basics/concreteproducts_acc.asp
>>
>> Thanks for lunch, it is always nice to see you guys.
>>
>> Dan
> Once a gain I have done the stupid thing and sent an email to a

news

Quoted message said:

Quoted message said:

Quoted message said:

> group - please ignore.
There we were looking for a bicycle application for aerated

concrete;

Quoted message said:

Quoted message said:

Well, this application immediately came to mind:

http://sheldonbrown.com/real-man.html

- Frank Krygowski

I will point out that ACC weighs less per unit volume than carbon

fiber

Quoted message said:

composite. Maybe the techno-geek bicycle folks will fall for it as the
newest thing in lightweight biking. And for the guy trying to braze up
his own frame, he can use his woodworking hand tools to shape an ACC >

frame.

Yes but can the amateur builder properly pre-stress the concrete?

Chas.

* * Chas said:

"Dan" <[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

Quoted message said:

Kinky Cowboy wrote:
> On Fri, 01 Dec 2006 10:54:34 -0800, Dan <[email hidden]>
> wrote:
>
>> Dan wrote:
>>> In case you are interested:
>>>
>>> http://www.cement.org/basics/concreteproducts_acc.asp
>>>
>>> Thanks for lunch, it is always nice to see you guys.
>>>
>>> Dan
>> Once a gain I have done the stupid thing and sent an email to a

news

Quoted message said:

Quoted message said:

>> group - please ignore.
> There we were looking for a bicycle application for aerated

concrete;

Quoted message said:

Quoted message said:

Well, this application immediately came to mind:

http://sheldonbrown.com/real-man.html

- Frank Krygowski

I will point out that ACC weighs less per unit volume than carbon

fiber

Quoted message said:

composite. Maybe the techno-geek bicycle folks will fall for it as the
newest thing in lightweight biking. And for the guy trying to braze up
his own frame, he can use his woodworking hand tools to shape an ACC >

frame.

Yes but can the amateur builder properly pre-stress the concrete?

Chas.

Dear Chas,

I don't believe a word of it. I see no concrete examples here.

Cheers,

Carl Fogel

Kinky Cowboy said:

Dan <[email hidden]>wrote:

Quoted message said:

Dan said:

http://www.cement.org/basics/concreteproducts_acc.asp

Once a gain I have done the stupid thing and sent an email to a news
group - please ignore.

There we were looking for a bicycle application for aerated concrete;
maybe the guy who's still looking for a 23.4mm seatpost could make one
from it?

We've discussed for years (errrr, make that decades) that frame
material simply can't make a significant difference in ride quality.

But now, I have to change my position on that.

If you build a frame that weighs (for example), as much as the
cyclist, the ability of the tire to transfer vertical deflection to
the rider will be much reduced (since the frame will essentially
resist being "pushed up"😉. Sure, you're not going to win any hill
climbs on a concrete frame, but given the relatively low penalty
associated with additional weight on the flats, who knows? Could be
the "next big thing".

If so, I'm going to start offering a line of over-built titanium
car-top carriers (though the number of cars with a roof capable of
supporting a 150 pound bike, or the number of riders who could lift
one might reduce my potential market...).

Mark Hickey
Habanero Cycles
http://www.habcycles.com
Home of the $795 ti frame

Mark Hickey said:

Kinky Cowboy said:

Dan <[email hidden]>wrote:

Quoted message said:

Dan wrote:
> http://www.cement.org/basics/concreteproducts_acc.asp
>
Once a gain I have done the stupid thing and sent an email to a news
group - please ignore.

There we were looking for a bicycle application for aerated concrete;
maybe the guy who's still looking for a 23.4mm seatpost could make one
from it?

We've discussed for years (errrr, make that decades) that frame
material simply can't make a significant difference in ride quality.

But now, I have to change my position on that.

If you build a frame that weighs (for example), as much as the
cyclist, the ability of the tire to transfer vertical deflection to
the rider will be much reduced (since the frame will essentially
resist being "pushed up"😉. Sure, you're not going to win any hill
climbs on a concrete frame, but given the relatively low penalty
associated with additional weight on the flats, who knows? Could be
the "next big thing".

If so, I'm going to start offering a line of over-built titanium
car-top carriers (though the number of cars with a roof capable of
supporting a 150 pound bike, or the number of riders who could lift
one might reduce my potential market...).

Mark Hickey
Habanero Cycles
http://www.habcycles.com
Home of the $795 ti frame

Mark-

Concrete isn't a good choice if you want a heavy bike. Pick steel or
titanium.

Steel 490 pcf
Titanium 280 pcf
Aluminum 170 pcf
Concrete 150 pcf
Autoclaved concrete 40 pcf
Wood 35 pcf

Dan

On Sat, 02 Dec 2006 08:50:36 -0800, Dan <[email hidden]>

Quoted message said:

Mark Hickey said:

Kinky Cowboy said:

Dan <[email hidden]>wrote:
> Dan wrote:
>> http://www.cement.org/basics/concreteproducts_acc.asp
>>
> Once a gain I have done the stupid thing and sent an email to a news
> group - please ignore.
There we were looking for a bicycle application for aerated concrete;
maybe the guy who's still looking for a 23.4mm seatpost could make one
from it?

We've discussed for years (errrr, make that decades) that frame
material simply can't make a significant difference in ride quality.

But now, I have to change my position on that.

If you build a frame that weighs (for example), as much as the
cyclist, the ability of the tire to transfer vertical deflection to
the rider will be much reduced (since the frame will essentially

Concrete isn't a good choice if you want a heavy bike. Pick steel or
titanium.

Steel 490 pcf
Titanium 280 pcf
Aluminum 170 pcf
Concrete 150 pcf
Autoclaved concrete 40 pcf
Wood 35 pcf

Dan

Gold has better self damping, is more resistant to corrosion and helps
your sprung/unsprung weight ratio by being denser than any of them at
19.3g cm^-3 (1210lb/cu.ft.)

Even so, a solid gold frame with conventional 'tube' ODs would weigh
only about 40kg

Kinky Cowboy*

*Batteries not included
May contain traces of nuts
Your milage may vary

Dan said:

Mark Hickey said:

Kinky Cowboy said:

Dan <[email hidden]>wrote:
> Dan wrote:
>> http://www.cement.org/basics/concreteproducts_acc.asp
>>
> Once a gain I have done the stupid thing and sent an email to a news
> group - please ignore.
There we were looking for a bicycle application for aerated concrete;
maybe the guy who's still looking for a 23.4mm seatpost could make one
from it?

We've discussed for years (errrr, make that decades) that frame
material simply can't make a significant difference in ride quality.

But now, I have to change my position on that.

If you build a frame that weighs (for example), as much as the
cyclist, the ability of the tire to transfer vertical deflection to
the rider will be much reduced (since the frame will essentially
resist being "pushed up"😉. Sure, you're not going to win any hill
climbs on a concrete frame, but given the relatively low penalty
associated with additional weight on the flats, who knows? Could be
the "next big thing".

If so, I'm going to start offering a line of over-built titanium
car-top carriers (though the number of cars with a roof capable of
supporting a 150 pound bike, or the number of riders who could lift
one might reduce my potential market...).

Mark Hickey
Habanero Cycles
http://www.habcycles.com
Home of the $795 ti frame

Mark-

Concrete isn't a good choice if you want a heavy bike. Pick steel or
titanium.

Steel 490 pcf
Titanium 280 pcf
Aluminum 170 pcf
Concrete 150 pcf
Autoclaved concrete 40 pcf
Wood 35 pcf

Depleted uranium has a specific gravity of about 1185 pcf.

--
Tom Sherman - Post Free or Die!

"Mark Hickey" <[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

Kinky Cowboy said:

Dan <[email hidden]>wrote:

Quoted message said:

Dan wrote:
> http://www.cement.org/basics/concreteproducts_acc.asp
>
Once a gain I have done the stupid thing and sent an email to a news
group - please ignore.

There we were looking for a bicycle application for aerated concrete;
maybe the guy who's still looking for a 23.4mm seatpost could make

one

Quoted message said:

Quoted message said:

from it?

We've discussed for years (errrr, make that decades) that frame
material simply can't make a significant difference in ride quality.

But now, I have to change my position on that.

If you build a frame that weighs (for example), as much as the
cyclist, the ability of the tire to transfer vertical deflection to
the rider will be much reduced (since the frame will essentially
resist being "pushed up"😉. Sure, you're not going to win any hill
climbs on a concrete frame, but given the relatively low penalty
associated with additional weight on the flats, who knows? Could be
the "next big thing".

If so, I'm going to start offering a line of over-built titanium
car-top carriers (though the number of cars with a roof capable of
supporting a 150 pound bike, or the number of riders who could lift
one might reduce my potential market...).

Mark Hickey
Habanero Cycles
http://www.habcycles.com
Home of the $795 ti frame

Carbon fiber rebar.....

Chas.

"Johnny Sunset" <[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

Dan said:

Mark Hickey said:

Kinky Cowboy <[email hidden]> wrote:

> Dan <[email hidden]>wrote:
>> Dan wrote:
>>> http://www.cement.org/basics/concreteproducts_acc.asp
>>>
>> Once a gain I have done the stupid thing and sent an email to a

news

Quoted message said:

Quoted message said:

Quoted message said:

>> group - please ignore.
> There we were looking for a bicycle application for aerated

concrete;

Quoted message said:

Quoted message said:

Quoted message said:

> maybe the guy who's still looking for a 23.4mm seatpost could

make one

Quoted message said:

Quoted message said:

Quoted message said:

>from it?

We've discussed for years (errrr, make that decades) that frame
material simply can't make a significant difference in ride

quality.

Quoted message said:

Quoted message said:

Quoted message said:

But now, I have to change my position on that.

If you build a frame that weighs (for example), as much as the
cyclist, the ability of the tire to transfer vertical deflection

to

Quoted message said:

Quoted message said:

Quoted message said:

the rider will be much reduced (since the frame will essentially
resist being "pushed up"😉. Sure, you're not going to win any hill
climbs on a concrete frame, but given the relatively low penalty
associated with additional weight on the flats, who knows? Could

be

Quoted message said:

Quoted message said:

Quoted message said:

the "next big thing".

If so, I'm going to start offering a line of over-built titanium
car-top carriers (though the number of cars with a roof capable of
supporting a 150 pound bike, or the number of riders who could

lift

Quoted message said:

Quoted message said:

Quoted message said:

one might reduce my potential market...).

Mark Hickey
Habanero Cycles
http://www.habcycles.com
Home of the $795 ti frame

Mark-

Concrete isn't a good choice if you want a heavy bike. Pick steel or
titanium.

Steel 490 pcf
Titanium 280 pcf
Aluminum 170 pcf
Concrete 150 pcf
Autoclaved concrete 40 pcf
Wood 35 pcf

Depleted uranium has a specific gravity of about 1185 pcf.

--
Tom Sherman - Post Free or Die!

DU has some drawbacks, especially if you ever want to have kids...

I was thinking more along the lines of tantalum or tungsten.

Hills might be killer but remember there's always the backside! ;-)

Chas.

* * Chas said:

"Johnny Sunset" <[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

Dan said:

Concrete isn't a good choice if you want a heavy bike. Pick steel or
titanium.

Steel 490 pcf
Titanium 280 pcf
Aluminum 170 pcf
Concrete 150 pcf
Autoclaved concrete 40 pcf
Wood 35 pcf

Depleted uranium has a specific gravity of about 1185 pcf.

--
Tom Sherman - Post Free or Die!

DU has some drawbacks, especially if you ever want to have kids...

A polymer coating would stop the alpha radiation. DU is safe when
covered with a barrier that stops alpha radiation (intact powder
coating would likely be sufficient) and not ingested. The real danger
comes from DU when it burns and forms oxide particles that can be
inhaled.

--
Tom Sherman - Post Free or Die!

In article
<[email hidden]>,

* * Chas said:

"Johnny Sunset" <[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

Dan said:

Mark Hickey wrote:
> Kinky Cowboy <[email hidden]> wrote:
>
>> Dan <[email hidden]>wrote:
>>> Dan wrote:
>>>> http://www.cement.org/basics/concreteproducts_acc.asp
>>>>
>>> Once a gain I have done the stupid thing and sent an email to a

news

Quoted message said:

Quoted message said:

>>> group - please ignore.
>> There we were looking for a bicycle application for aerated

concrete;

Quoted message said:

Quoted message said:

>> maybe the guy who's still looking for a 23.4mm seatpost could

make one

Quoted message said:

Quoted message said:

>>from it?
>
> We've discussed for years (errrr, make that decades) that frame
> material simply can't make a significant difference in ride

quality.

Quoted message said:

Quoted message said:

>
> But now, I have to change my position on that.
>
> If you build a frame that weighs (for example), as much as the
> cyclist, the ability of the tire to transfer vertical deflection

to

Quoted message said:

Quoted message said:

> the rider will be much reduced (since the frame will essentially
> resist being "pushed up"😉. Sure, you're not going to win any hill
> climbs on a concrete frame, but given the relatively low penalty
> associated with additional weight on the flats, who knows? Could

be

Quoted message said:

Quoted message said:

> the "next big thing".
>
> If so, I'm going to start offering a line of over-built titanium
> car-top carriers (though the number of cars with a roof capable of
> supporting a 150 pound bike, or the number of riders who could

lift

Quoted message said:

Quoted message said:

> one might reduce my potential market...).
>
> Mark Hickey
> Habanero Cycles
> http://www.habcycles.com
> Home of the $795 ti frame

Mark-

Concrete isn't a good choice if you want a heavy bike. Pick steel or
titanium.

Steel 490 pcf
Titanium 280 pcf
Aluminum 170 pcf
Concrete 150 pcf
Autoclaved concrete 40 pcf
Wood 35 pcf

Depleted uranium has a specific gravity of about 1185 pcf.

--
Tom Sherman - Post Free or Die!

DU has some drawbacks, especially if you ever want to have kids...

DU does not emit much ionizing radiation, and that is
alpha rays that can be stopped by paint. However in
2000-10000 years U238 (half life 4e9 years) decay
products build up to hazardous levels.

Quoted message said:

I was thinking more along the lines of tantalum or tungsten.

Hills might be killer but remember there's always the backside! ;-)

Chas.

--
Michael Press

Good thread.

Dan: please feel free to copy r.b.t. on all your future e-mails.

Johnny Sunset said:

* * Chas said:

"Johnny Sunset" <[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

Dan wrote:

>Concrete isn't a good choice if you want a heavy bike. Pick steel or
>titanium.
>
>Steel 490 pcf
>Titanium 280 pcf
>Aluminum 170 pcf
>Concrete 150 pcf
>Autoclaved concrete 40 pcf
>Wood 35 pcf

Depleted uranium has a specific gravity of about 1185 pcf.

--
Tom Sherman - Post Free or Die!

DU has some drawbacks, especially if you ever want to have kids...

A polymer coating would stop the alpha radiation. DU is safe when
covered with a barrier that stops alpha radiation (intact powder
coating would likely be sufficient) and not ingested. The real danger
comes from DU when it burns and forms oxide particles that can be
inhaled.

Guess I won't find a market for my new lead-shielded saddles, then.

Mark J.

Mark said:

Johnny Sunset said:

* * Chas said:

"Johnny Sunset" <[email hidden]> wrote in message
news:[email hidden]...

> Dan wrote:
>
>> Concrete isn't a good choice if you want a heavy bike. Pick steel or
>> titanium.
>>
>> Steel 490 pcf
>> Titanium 280 pcf
>> Aluminum 170 pcf
>> Concrete 150 pcf
>> Autoclaved concrete 40 pcf
>> Wood 35 pcf
>
> Depleted uranium has a specific gravity of about 1185 pcf.
>
> --
> Tom Sherman - Post Free or Die!

DU has some drawbacks, especially if you ever want to have kids...

A polymer coating would stop the alpha radiation. DU is safe when
covered with a barrier that stops alpha radiation (intact powder
coating would likely be sufficient) and not ingested. The real danger
comes from DU when it burns and forms oxide particles that can be
inhaled.

Guess I won't find a market for my new lead-shielded saddles, then.

Mark J.

Or the lead chamois shorts.

Quoted message said:

Good thread.

Dan: please feel free to copy r.b.t. on all your future e-mails.

This one was particularly exciting, most are pretty dull.

"Mark" <[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

Johnny Sunset said:

* * Chas said:

"Johnny Sunset" <[email hidden]> wrote in message
news:[email hidden]...

>Dan wrote:
>
>>Concrete isn't a good choice if you want a heavy bike. Pick steel

or

Quoted message said:

Quoted message said:

Quoted message said:

>>titanium.
>>
>>Steel 490 pcf
>>Titanium 280 pcf
>>Aluminum 170 pcf
>>Concrete 150 pcf
>>Autoclaved concrete 40 pcf
>>Wood 35 pcf
>
>Depleted uranium has a specific gravity of about 1185 pcf.
>
>--
>Tom Sherman - Post Free or Die!

DU has some drawbacks, especially if you ever want to have kids...

A polymer coating would stop the alpha radiation. DU is safe when
covered with a barrier that stops alpha radiation (intact powder
coating would likely be sufficient) and not ingested. The real

danger

Quoted message said:

Quoted message said:

comes from DU when it burns and forms oxide particles that can be
inhaled.

Guess I won't find a market for my new lead-shielded saddles, then.

Mark J.

Tungsten provides better radiation shielding and has a higher density
than lead.

Chas.