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Researchers turn carbon dioxide into sustainable concrete

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  Researchers turn carbon dioxide into sustainable concrete Sam Wormley <swormley1@gmail.com> - 2016-03-26 11:16 -0500
    Re: Researchers turn carbon dioxide into sustainable concrete jimp@specsol.spam.sux.com - 2016-03-26 18:03 +0000
      Re: Researchers turn carbon dioxide into sustainable concrete "Y.Porat" <y.y.porat@gmail.com> - 2016-03-27 00:22 -0700
    Re: Researchers turn carbon dioxide into sustainable concrete Sergio <invalid@invalid.com> - 2016-03-26 21:19 -0500
      Re: Researchers turn carbon dioxide into sustainable concrete Sergio <invalid@invalid.com> - 2016-03-26 21:25 -0500
    Re: Researchers turn carbon dioxide into sustainable concrete benj <none@gmail.com> - 2016-03-26 23:20 -0400

#565753 — Researchers turn carbon dioxide into sustainable concrete

Researchers turn carbon dioxide into sustainable concrete
> https://www.sciencedaily.com/releases/2016/03/160322162515.htm


> Imagine a world with little or no concrete. Would that even be
> possible? After all, concrete is everywhere -- on our roads, our
> driveways, in our homes, bridges and buildings. For the past 200
> years, it's been the very foundation of much of our planet. But the
> production of cement, which when mixed with water forms the binding
> agent in concrete, is also one of the biggest contributors to
> greenhouse gas emissions. In fact, about 5 percent of the planet's
> greenhouse gas emissions comes from concrete.

>

> Story Source:
>
> The above post is reprinted from materials provided by University of
> California Los Angeles UCLA. The original item was written by George
> Foulsham. Note: Materials may be edited for content and length.
>


-- 

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to the discussion of physics, news from the physics
community, and physics-related social issues.

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#565780

Sam Wormley <swormley1@gmail.com> wrote:
> Researchers turn carbon dioxide into sustainable concrete
>> https://www.sciencedaily.com/releases/2016/03/160322162515.htm

This is a steaming pile of arm waving nonsense.

The essence of the story is lime and CO2 are 3D printed to make a
solid object.

Concrete is used to build BIG things, like buildings, dams, roads, etc.

The idea of 3D printing Hoover Dam is just silly.


-- 
Jim Pennino

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#565882

On Saturday, March 26, 2016 at 9:16:06 PM UTC+3, ji...@specsol.spam.sux.com wrote:
> Sam Wormley <swormley1@gmail.com> wrote:
> > Researchers turn carbon dioxide into sustainable concrete
> >> https://www.sciencedaily.com/releases/2016/03/160322162515.htm
> 
> This is a steaming pile of arm waving nonsense.
> 
> The essence of the story is lime and CO2 are 3D printed to make a
> solid object.
> 
> Concrete is used to build BIG things, like buildings, dams, roads, etc.
> 
> The idea of 3D printing Hoover Dam is just silly.
> 
> 
> -- 
> Jim Pennino
===========================
one thing that non  civil Engineers do not know
is 
that the trick is not just by concrete per Ce
IT IS BY THE COMBINATION OF
CONCRETE PLUS STEEL  (at the right locations of concrete  )
2
there is a magic wonderful cooperation between concrete and steel :
ie
the coefficient of thermal elongation between then]
is the same !! (just luck !!
2
concrete and steel are living with a wonderful
'synergy !!
ie
concrete is protection steel from corrosion !
so
if you want to replace them
by something else 
that 'something' must answer all the above problems   
and steel !!

Eng
Y .Porat
===========================

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#565824

On 3/26/2016 11:16 AM, Sam Wormley wrote:
> Researchers turn carbon dioxide into sustainable concrete
>> https://www.sciencedaily.com/releases/2016/03/160322162515.htm
>
>
>> Imagine a world with little or no concrete. Would that even be



article is pile of poop.
gernic advertising for  ucla

concrete is not the problem,  making an ingrediant for it is.

Heating Limestone.

(which nature, via sea critters, put the CO2 in the limestone in the 
first place, so it is only releasing previous atmospheric CO2.)

they are using a 3d printer to solve the CO2 problem, not much of a 
problem then.  How much CO2 is realeased making the 3D printer, Dudes?

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#565826

On 3/26/2016 9:19 PM, Sergio wrote:
> On 3/26/2016 11:16 AM, Sam Wormley wrote:
>> Researchers turn carbon dioxide into sustainable concrete
>>> https://www.sciencedaily.com/releases/2016/03/160322162515.htm
>>
>>
>>> Imagine a world with little or no concrete. Would that even be
>
>
>
> article is pile of poop.
> gernic advertising for  ucla
>
> concrete is not the problem,  making an ingrediant for it is.
>
> Heating Limestone.
>
> (which nature, via sea critters, put the CO2 in the limestone in the
> first place, so it is only releasing previous atmospheric CO2.)
>
> they are using a 3d printer to solve the CO2 problem, not much of a
> problem then.  How much CO2 is realeased making the 3D printer, Dudes?
>

yep OP is total crap;


http://concretethinker.com/technicalbrief/Concrete-Cement-CO2.aspx

Concrete reabsorbs most of the CO2 emitted by calcination during the 
time it serves its useful life, and shortly after it is demolished and 
crushed.

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#565836

On 03/26/2016 12:16 PM, Sam Wormley wrote:
> Researchers turn carbon dioxide into sustainable concrete
>> https://www.sciencedaily.com/releases/2016/03/160322162515.htm
>
>
>> Imagine a world with little or no concrete. Would that even be
>> possible? After all, concrete is everywhere -- on our roads, our
>> driveways, in our homes, bridges and buildings. For the past 200
>> years, it's been the very foundation of much of our planet. But the
>> production of cement, which when mixed with water forms the binding
>> agent in concrete, is also one of the biggest contributors to
>> greenhouse gas emissions. In fact, about 5 percent of the planet's
>> greenhouse gas emissions comes from concrete.
>
>>
>
>> Story Source:
>>
>> The above post is reprinted from materials provided by University of
>> California Los Angeles UCLA. The original item was written by George
>> Foulsham. Note: Materials may be edited for content and length.

Sam, the level of your ignorance defies credulity. The only thing more 
stooopid than you greens is Kalifornia Lefty progie greens and the only 
thing more stooopid than them is HVAC (no offense).

How stoopid are you? Well, you bought this story. So how does one make 
non-hydraulic cement? (Which does NOT set up under water or in thick 
walls, by the way)

"Non-hydraulic lime is primarily composed of (generally greater than 
95%) calcium hydroxide, Ca(OH)2. Non-hydraulic lime is produced by first 
heating sufficiently pure calcium carbonate to between 954° and 1066°C, 
driving off carbon dioxide to produce quicklime (calcium oxide). This is 
done in a lime kiln. The quicklime is then slaked – hydrated by being 
thoroughly mixed with enough water to form a slurry (lime putty), or 
with less water to produce dry powder — a hydrated lime (calcium 
hydroxide). Hydrated lime naturally turns back into calcium carbonate by 
reacting with carbon dioxide in the air, the entire process being called 
the lime cycle."

https://en.wikipedia.org/wiki/Lime_mortar

Did your ignorant ass catch that? You make lime mortar by HEATING 
limestone: Which takes fire and that produces CO2! And then that heating 
in addition DRIVES OFF CO2 from the calcium carbonate. Lose-lose you 
loser! And only after you add water to make a mortar does it absorb back 
some of the CO2 you just drove off IF it is exposed to air. Hence thick 
layers do not work. Hence you've created MORE CO2 with the process than 
you've managed to take back in. Plus the lime mortar is piss poor cement 
that doesn't set up under water or in thick layers.

This whole bullshit idea is as idiotic and destructive as the green idea 
of saving the planet by burning food. Too bad for the million African 
babies starving to death because of your idiocy But you are all Progie 
libs and atheists anyway so a little baby killing is just "natural 
selection" to you.

-- 

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