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 !
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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 !
by Norman Davison