DBPapers
DOI: 10.5593/SGEM2014/B51/S20.110

VERIFYING THE ADVANTAGES OF CONCRETE ROAD PAVEMENT BASED ON FLY ASH USING THROUGH THE LCA METHOD

M. Ondova, A. Estokova, L. Meciarova
Wednesday 1 October 2014 by Libadmin2014

References: 14th International Multidisciplinary Scientific GeoConference SGEM 2014, www.sgem.org, SGEM2014 Conference Proceedings, ISBN 978-619-7105-17-9 / ISSN 1314-2704, June 19-25, 2014, Book 5, Vol. 1, 807-814 pp

ABSTRACT
For globally significant products such as cement, environmental life cycle assessment (LCA) is a valuable tool for improving our understanding of the environmental hazards posed by a product’s life stages. In addition, LCA allows cement producers to optimize the manufacturing process by reducing adverse environmental impacts. The paper points to the advantages of using fly ash in the road construction. It presents results obtained by optimization components of concrete mixture using 15 % wt. fly ash as cement replacement through the method LCA. The calculated LCA values were normalized to 1km (4m of width x 0.25m of thickness) of concrete road. Concluding results the optimized fly ash concrete road pavement were as follows: GWP values 16.7xE5 kg CO2eq/kg; PEI: 26.1xE5 MJ/kg; AP: 3.2 kg SO2eq/kg; ODP: 8.4E-3 kg CFC-11eq/kg; POCP: 1.9E2 kg C2H2eq/kg, and NP: 8.1xE2 kg (PO4)-3eq/kg. In comparison with standard concrete road, the results values were reduced by 6-10% on the average. The environmental impacts of 25 and 50% wt. of cement replacement by fly ash were also analyzed.

Keywords: environmental protection, fly ash, LCA, green concrete