Thermo-mechanical Characterization of Insulating Bio-plasters Containing Recycled Volcanic Pyroclasts
Loredana Contrafatto1, Salvatore Gazzo2, Antonio Purrazzo3, Antonio Gagliano4, *
1 Department of Civil Engineering and Architecture, University of Catania, Catania, Italy
2 Department of Civil Engineering and Architecture, University of Catania, Catania, Italy
3 Material Testing Laboratory collaborator, University of Catania, Catania, Italy
4 Department of Electrical, Electronics and Computer Engineering, University of Catania, Catania, Italy
The research proposes the reuse of volcanic wastes in the production of lightened and insulating bio-plasters.
The goal is the production of a novel sustainable construction material that reduces the environmental impact.
Four mixtures were designed. The recycled Volcanic Ash was used in combination with two bio-compatible binders; basically Natural Hydraulic Lime (NHL) or calcium hydroxide blended with a commercial Portland cement (CH-CEM). To improve thermal properties, CH-CEM mixtures were treated with an Air Entraining Agent (AEA) in two different percentages and a breathable resin (R). The main physical, mechanical and thermal properties were experimentally determined.
The results of such analysis indicate that the mixture NHL, realized using hydraulic lime as a binder, do not satisfy the threshold of the water absorption coefficient, exceeding the limit established by UNI EN 998-1 standard.
On the contrary, one of the mixtures CH-CEM, containing both AEA and R, is suitable for use as lightweight plastering mortar and also satisfies the requirements for insulating mortars.
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* Address correspondence to this author at the Department of Electrical, Electronics and Computer Engineering, University of Catania, Catania, Italy; Tel: 3204332228; E-mail: email@example.com