2026-04-17T01:23:34Zhttps://recercat.cat/oai/request

oai:recercat.cat:2445/1437172025-12-04T20:55:36Zcom_2072_1057col_2072_478796col_2072_478917

00925njm 22002777a 4500 dc Valle Zermeño, Ricardo del author Chimenos Ribera, Josep Ma. author Giró Paloma, Jessica author Formosa Mitjans, Joan author 2019-11-04T09:18:51Z 2019-11-04T09:18:51Z 2014-08-31 2019-11-04T09:18:52Z The presence of neoformed cement-like phases during the weathering of non-stabilized freshly quenched bottom ash favours the development of a bound pavement material with improved mechanical properties. Use of weathered and freshly quenched bottom ash mix layers placed one over the other allowed the retention of leached heavy metals and metalloids by means of a reactive percolation barrier. The addition of 50% of weathered bottom ash to the total subbase content diminished the release of toxic species to below environmental regulatory limits. The mechanisms of retention and the different processes and factors responsible of leaching strongly depended on the contaminant under concern as well as on the chemical and physical factors. Thus, the immediate reuse of freshly quenched bottom ash as a subbase material in road constructions is possible, as both the mechanical properties and long-term leachability are enhanced. Incineració Metalls pesants Materials de construcció Contaminació de l'aigua Incineration Heavy metals Building materials Water pollution Use of weathered and fresh bottom ash mix layers as a subbase in road constructions: environmental behavior enhancement by means of a retaining barrier