Based on an extensive data collection in Australian concrete manufacturing plants and quarries [24], the CO2 emissions generated by typical normal strength concrete mixes using Portland cement as the binder were found to range between 290 and 320 kg-CO2-e/m3,mostly due to the Portland cement manufacture. Thus, the CO2 emission related to geopolymer concrete curing for 2 days remains relatively low compared to the CO2 emission resulting from OPC manufacture, whereas a 7 days curing regime cannot be considered appropriate for
classification as a low- embodied -carbon concrete.