Eco-toxicity assessment of concrete prepared with industrial wastes

摘要

The technical performance and the environmental behavior of new materials are key factors in their acceptance. In this work, wastes from local industries (lime sludge and biomass fly ashes) replaced natural fine aggregates in the concrete production. The concrete mechanical strength was evaluated and eco-toxicity was assessed using duckweed as biomarkers. The results showed that wastes addition to the concrete mix led to a decrease of 3% and 35% in the compressive strength when fly ashes and lime were used, respectively. The bioassays performed did not show different behaviors between conventional concrete and concrete produced with the wastes.