Ecological Evaluation of Lime Binders using Natural Lime

CO2 reabsorption comparison for St Astier Natural Hydraulic Lime mortars compared with similar Portland Cement : Lime Mortar Mixes

Carbon Dioxide deficit for 1 Cubic Metre of mortar

Ecological Evaluation
  Ammount of CO2 in Kilogrammes Emmited and Recovered per KG of Binder in the production and use of typical mortars.  
  Binder Constituents for Cement Mortars in a 1:1:5 ratio. (KGs per M3) Binder Constituents for an equivalent St Astier Natural Hydraulic Lime Mortar in a 2:5 ratio (KGs per M3)  
  Sources of Carbon Dioxide Portland Cement 240 KGs required High Calcium Lime 83 KGs required NHL 5 280 KGs required NHL 3.5 244 KGs required NHL 2 204 KGs required  
  Thermie (Fr) of Energy used to produce 1 tonne of binder 900 650 650 550 690  
A CO2 generated from Fuel 96.72 25.56 77 61.44 65.89 Base on coal requirements to produce 1 tonne of binder
B CO2 Generated from Material (De- Carbonisation) 99.84 45.12 100.8 85.4 87.72 CO2 emission during manufacture
C Re-Absorbed by Material Nil 44.4 61.64 65.88 71.4 CO2 reabsorption during curing and first 2 years
  CO2 Deficit - (A+B) - C KGs per M3 of mortar 196.56 + 26.28 = 222.84 116.16 80.96 82.21 Value of CO2 emission against reabsorption
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