Abstract: The ash expelled by the volcano of La Palma during 85 days, can contribute to the reconstruction of the damaged infrastructure of the island, as a secondary raw material in the manufacture of sustainable building materials, such as alkaline activated binders (AABs). The utilization of this volcanic ash as natural pozzolanic material has been successfully assessed as a sole precursor in the formulation of ABBs, due to its high content of aluminosilicates. In order to determine the potential environmental impact of these new binders on the marine environment, in this research, chemical assays (UNE-EN 12457-4 leaching test) and biological assays (UNE-EN 11348-3 luminescent bacteria bioassay with marine bacteria Vibrio fischeri were performed, according to the harmonized standards proposed in the Construction Products Regulation (CPR). The leaching test results showed that all the analysed trace elements are below of non-hazardous materials limits. The toxicity results showed that all the samples, Volcanic Ash (VA) and binders (AAB 6M and AAB 8M), are below the values stablished in the CPR standards (CEN/TR 17105:2017), Toxicity Criteria (luminescence reduction of 20%) and Pass Criteria, LID (lowest ineffective dilution) ? 8, so it verifies that the samples do not present eco-toxicity.

Autoría

Descargar referencia