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Been good news for the Green`s this month
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Post new topic   Reply to topic    Downsizer Forum Index -> Conservation and Environment
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dpack



Joined: 02 Jul 2005
Posts: 37907
Location: yes
PostPosted: Sat Jul 04, 15 4:18 pm    Post subject:  Reply with quote    

THE LIMESTONE COMPONENT OF CEMENT

yes most of "cement"first sets due to hydration ,ie roast it ,water gone ,water back,it sets

the bit that releases co2 (ie the ca co3 to ca o )will react with environmental co2(ie same amount as roasted out )

unless im very wrong the long term co2 footprint of either lime or "cement"(there are lots of subcatagories) depends on the energy sources used to mine,transport and to roast the stuff.

cement chemistry is complex but the basics are if it gives off co2 from the minerals it will take them back

this is one reason "cement"continues to gain cohesion (if the dampness/access to environmental input is there)

there is a big difference between set and cured

dpack



Joined: 02 Jul 2005
Posts: 37907
Location: yes
PostPosted: Sat Jul 04, 15 4:23 pm    Post subject: Reply with quote    

as to being a "greenie" did you see the hobbit film when gandalf split the rock to let the sun shine through.

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