Alkali activated materials from Tajogaite volcanic ash (La Palma, Spain): a green recovery after the 2021 eruption

• DOI: 10.30909/vol.07.02.717731
• Publication Date: 2024-10-06T09:55:58Z
• Authors: Roberta Occhipinti; Silvia Portale; Gabriele Lanzafame; Domingo Gimeno; Marko Kudrna Prašek; Paolo Mazzoleni; Germana Barone
• Keywords: Volcanic ash; Vulcanian eruption

The 2021 Tajogaite eruption was marked by intense pyroclastic fallout that covered a substantial portion of La Palma island, with maximum thicknesses in the central-western part. This, combined lava flows, resulted widespread damage to public and private properties. In this study, we investigated if volcanic ash from could serve as raw material synthesis alkali activated materials (AAMs) contribute construction eco-friendly buildings restoration those damaged eruption. Volcanic ash-based AAMs were synthesized using NaOH Na2SiO3 alkaline solutions adding metakaolin enhance reactivity enable processing at ambient temperatures. Lightweight porous also produced H2O2 metallic aluminum foaming agents. Chemical, textural, physical, mechanical analyses on final products assessed their suitability environmentally friendly be used reconstruction island infrastructure, opening new perspectives recovery actions can undertaken after disastrous eruptions. Of all islands Canary Archipelago, has experienced highest number eruptions (8) historical times, which showing considerable similarity terms eruptive mechanisms composition most recent event. Although study fresh ash, similar envisaged for both other scenarios worldwide.