The production of one ton of standard Portland cement releases into the atmosphere 0.54 tons of CO2 resulting from the decomposition of calcite. Moreover, the manufacturing processes need high amounts of energy, mainly for clinkering and milling. Thus, taking into account calcite decarbonation and burning of the fuel in the kilns and the electricity consumption to obtain a ton of cement, 0.97 tons of CO2 are released into atmosphere. This implies that the overall CO2 emissions from the cement industry are ~ 6% of all anthropogenic carbon dioxide and account for 4% of the global warming of the planet [1]. Finding effective ways for reducing such emissions is therefore a strong research priority. Belite Portland (BP) clinkers may be an environmentally-friendly alternative as their production process leads to lower CO2 emissions than that of ordinary Portland cements, OPCs.
展开▼
