In this work, the feasibility of using Cumbre Vieja (La Palma Island, Spain) volcanic ash to produce Alkali Activated Materials (AAMs) was investigated for the first time. Last, recent (2021) eruption caused extensive damages due to lava flow invasion and the discharge of huge amount of pyroclasts, which volume amounted to 45×106 m3 [1] that blanketed the entire surface of the island. Although pyroclasts are considered as a waste material, previous studies showed excellent results of their use as raw materials in the AA- process [2,3]. For this reason, different formulations using Cumbre Vieja ash were prepared, adding small amount of metakaolin and using sodium hydroxide (8M) and sodium silicate solution as activators. After a curing period of 28 days at room temperature, the samples were investigated by XRD, FT-IR, SEM-EDS, microCT, pH and electric conductivity measurements. Results indicate that Cumbre Vieja ash-based AAMs proved to be highly satisfying in terms of the quality of the binders obtained.
Ash from Cumbre Vieja volcano (La Palma, Canary Islands, Spain) from waste to resource for AAMs technology.
Portale S.
Membro del Collaboration Group
;Occhipinti R.Membro del Collaboration Group
;Lanzafame G.Membro del Collaboration Group
;Barone G.Supervision
;Mazzoleni P.Supervision
2023-01-01
Abstract
In this work, the feasibility of using Cumbre Vieja (La Palma Island, Spain) volcanic ash to produce Alkali Activated Materials (AAMs) was investigated for the first time. Last, recent (2021) eruption caused extensive damages due to lava flow invasion and the discharge of huge amount of pyroclasts, which volume amounted to 45×106 m3 [1] that blanketed the entire surface of the island. Although pyroclasts are considered as a waste material, previous studies showed excellent results of their use as raw materials in the AA- process [2,3]. For this reason, different formulations using Cumbre Vieja ash were prepared, adding small amount of metakaolin and using sodium hydroxide (8M) and sodium silicate solution as activators. After a curing period of 28 days at room temperature, the samples were investigated by XRD, FT-IR, SEM-EDS, microCT, pH and electric conductivity measurements. Results indicate that Cumbre Vieja ash-based AAMs proved to be highly satisfying in terms of the quality of the binders obtained.File | Dimensione | Formato | |
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