Antibacterial Properties and Cytotoxicity of 100% Waste Derived Alkali Activated Materials: Slags and Stone Wool-Based Binders

In this study we compare the leaching behavior and antibacterial cytotoxic properties of 100% slag or stone wool derived alkali activated materials. The activity was measured as inhibiting capacity against two Gram-negative bacterial strains, Escherichia coli Pseudomonas aeruginosa one Gram-positive strain: Enterococcus faecalis . cytotoxicity were tested on mouse embryonic fibroblast NIH-3T3 cell-line. It proved that high quality 3D aluminosilicate network consolidated materials obtained from powders CaO MgO-rich slags wool, opportunely with NaO and/or Na-silicate, capable stabilizing heavy metal cations. concentrations leachate cations lower than European law limit when in water. effect additives composites, basal fibers nanocellulose, did not reduce chemical stability slightly influenced compressive strength. Weight loss water increased by 20% basalt addition, while it remained almost constant nanocellulose added. All materials, cement-like appearance, exhibited limited (viability 50 to 80% depending colony amount sample) absence cytotoxicity, envisaging good acceptance part final consumer zero ecological impact. CaO-rich formulations can replace ordinary Portland cement (showing viability at 100%) a certain capability for preventing reproduction E. S. aureus bacteria health environmental protection results.