Comparative environmental and economic assessment of a road pavement containing multiple sustainable materials and technologies

• DOI: 10.1016/j.conbuildmat.2024.136522
• Publication Date: 2024-05-20T23:19:39Z
• Authors: Arturs Riekstins; Viktors Haritonovs; Verners Straupe; Rolands Izaks; Remo Merijs-Meri; Janis Zicans

This study evaluates the environmental and economic benefits of recycled asphalt (RA), pavement (RAP), warm mix technology (WMA), wood fly ash (WFA), crumb rubber (CR) from end-of-life tires kraft lignin in individual courses a full-depth flexible pavement. The performs LCA LCCA for 19 mixtures (cradle-to-site) six scenarios (cradle-to-cradle). Four impact categories are considered: quantities materials used, global warming potential (GWP), cumulative energy demand (CED) road owner costs. Of all technologies considered, RA RAP have most positive effect on boosting more sustainable construction maintenance. results show that combining evaluated single reduces GWP by 30.7%, CED 25.0%, costs 17.9% compared to with virgin aggregates manufacturing at hot temperatures. need raw life cycle is significantly reduced 45.8% aggregates, 41.9% bitumen, 100% mineral filler, 50% cement, bitumen modifier. A total 1446.6 tons WFA, 20.5 tire rubber, 5.7 can be incorporated into 1 km section over entire cycle.