Economic and environmental impact analysis of cellulose nanofiber-reinforced concrete mixture production

Abstract

Incorporating cellulose nanofibers into concrete has a positive impact on its strength. This study evaluated how cellulose nanofiber-reinforced concrete affected the economic and environmental performance compared to conventional concrete. The estimated minimum selling price per unit mass (m3) per unit compressive strength (MPa) of cellulose nanofiber-reinforced concrete mixture is 12 % lower ($2.52/m3/MPa) compared to the minimum selling price of conventional concrete mixture ($2.87/m3/MPa). However, when comparing the minimum selling price on a mass basis, the cellulose nanofiber-reinforced concrete mixture showed a 3.33 % higher minimum selling price ($150/m3) than the conventional concrete mixture ($145/m3). Similarly, the estimated global warming impact of cellulose nanofiber-reinforced concrete mixture was higher by 0.59 % when evaluated on a mass basis (509.88 kg CO2 eq/m3) but 14.5 % lower when evaluated on per m3 per unit compressive strength basis (8.57 kg CO2 eq/m3/MPa), compared to conventional concrete mixture (506.88 kg CO2 eq/m3 or 10.02 kg CO2 eq/m3/MPa).