Green cement looks to be a great idea !

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Entrant Posted by Norman Davison View on LinkedIn	Friday 07 August 2009 11:39:19 am carbon negative cement is claimed by a new start up research company company Novachem . this looks to be a realy great contributor, to reducing CO2 by the Adsorbtion/fixation route. I realy like this one ! The claim is that if we switch from calcium oxide based cements to Magnesium Silicate based cements , we wil fix an additional 3/4 ton of CO2 /per ton of Cement used over the conventional cements. this has got to be a good route ! it is still at the research stage and much pilot plant test ting to be done . time frame to full scale development 5 years. If they can make it work then structulates will definitely use it for the eco- building panels Alert moderator
Entrant Posted by Norman Davison View on LinkedIn	Friday 07 August 2009 5:43:42 pm The reason this technology may work out well is that human prefer to lay concrete than to plant trees . One thing is certain human will not stop using cement/concretes , So a cement that capture 3/4 ton of CO2 /per ton of cement more than conventional portland cement has got to be a green winner . How this will compare with a small tree over its life time i dont know, But most of us humans don't want a tree house as their main residence. Alert moderator
Entrant Posted by Alex Hanganu	Saturday 08 August 2009 10:28:40 am Interesting Norman. 3/4 ton of CO2 per ton of cement or per ton of concrete? Next step would be to convince concrete to do some photosynthesis on its own, then we will have the perfect concrete trees. Alert moderator
Entrant Posted by Norman Davison View on LinkedIn	Sunday 09 August 2009 9:16:30 am The Co2 reduction is achieved as follows : conventinal portland cement requires 1500 C , and releases .tonnes of CO2 ( this included both driving CO2 out of the solid phase into the gas phase + the products of combustion . ) Total =0.8 tonnes CO2 /per tonne of cement During curing of the cement 0.4 tonnes CO2 leaves the atmosphere and is fixed in the solid phase. Carbon debit 0.4 tonnes CO2/tonne of cement. Novachems claim is that magnesium silicates release no CO2 into the vapour phase , requires only 650 C ( lower fired heat duty = Less CO2 product of combustion) Total production Carbon cost = 0.5 tonnes of CO2 The new cement formula fixes 1.1 tonnes of CO2 during the curing of the cement . So the carbon ballance is + 0.6 tonnes/per tonne of cement . Better start recalculating the load factors for the foundations ! Alert moderator

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Posted by Norman Davison

View on LinkedIn

Friday 07 August 2009 11:39:19 am

carbon negative cement is claimed by a new start up research company company Novachem . this looks to be a realy great contributor, to reducing CO2 by the Adsorbtion/fixation route. I realy like this one !

The claim is that if we switch from calcium oxide based cements to Magnesium Silicate based cements , we wil fix an additional 3/4 ton of CO2 /per ton of Cement used over the conventional cements.

this has got to be a good route ! it is still at the research stage and much pilot plant test ting to be done . time frame to full scale development 5 years.
If they can make it work then structulates will definitely use it for the eco- building panels

Entrant

Posted by Norman Davison

View on LinkedIn

Friday 07 August 2009 5:43:42 pm

The reason this technology may work out well is that human prefer to lay concrete than to plant trees .

One thing is certain human will not stop using cement/concretes , So a cement that capture 3/4 ton of CO2 /per ton of cement more than conventional portland cement has got to be a green winner .

How this will compare with a small tree over its life time i dont know, But most of us humans don't want a tree house as their main residence.

Entrant

Posted by Alex Hanganu

Saturday 08 August 2009 10:28:40 am

Interesting Norman. 3/4 ton of CO2 per ton of cement or per ton of concrete?
Next step would be to convince concrete to do some photosynthesis on its own, then we will have the perfect concrete trees.

Entrant

Posted by Norman Davison

View on LinkedIn

Sunday 09 August 2009 9:16:30 am

The Co2 reduction is achieved as follows : conventinal portland cement requires 1500 C , and releases .tonnes of CO2 ( this included both driving CO2 out of the solid phase into the gas phase + the products of combustion . ) Total =0.8 tonnes CO2 /per tonne of cement
During curing of the cement 0.4 tonnes CO2 leaves the atmosphere and is fixed in the solid phase. Carbon debit 0.4 tonnes CO2/tonne of cement.

Novachems claim is that magnesium silicates release no CO2 into the vapour phase , requires only 650 C ( lower fired heat duty = Less CO2 product of combustion) Total production Carbon cost = 0.5 tonnes of CO2

The new cement formula fixes 1.1 tonnes of CO2 during the curing of the cement . So the carbon ballance is + 0.6 tonnes/per tonne of cement .

Better start recalculating the load factors for the foundations !

Green cement looks to be a great idea !

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