A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
High temperature behavior of sodium and potassium volcanic ashes-based alkali-activated materials (Mt. Etna, Italy)
https://orcid.org/0000-0002-6183-4047
https://orcid.org/0000-0002-8841-283X
https://orcid.org/0000-0001-7559-5764
Graphical abstract Display Omitted
Highlights Evaluation of activating solution influence on high temperature resistance in AAMs. Higher availability of silicon and aluminum and better feasibility of the pastes. Monitoring formation of Si-O-Si and Si-O-Ca networks. Positive influence of the new crystallizations on mechanical resistance after 1000 °C. Densification behavior of K sample contrary to the melting of that Na.
Abstract Thermal performances at 1000 °C of volcanic ash-based alkali-activated materials by both sodium or potassium solutions have been tested. Once defined the feasibility for the potassium set, a multidisciplinary characterization including spectroscopic, thermal, mechanical, diffractometric before and after treatment and dilatometric analyses was applied. The formation kinetics of different networks was evaluated. A correlation between the high mechanical properties and the least amount of water was observed in non-treated samples. Treated samples at 1000 °C showed higher compressive strengths due to the crystallization of wollastonite, leucite and nepheline. Thermal stability was observed increased with the solid content in the potassium-based formulations.
High temperature behavior of sodium and potassium volcanic ashes-based alkali-activated materials (Mt. Etna, Italy)
https://orcid.org/0000-0002-6183-4047
https://orcid.org/0000-0002-8841-283X
https://orcid.org/0000-0001-7559-5764
Graphical abstract Display Omitted
Highlights Evaluation of activating solution influence on high temperature resistance in AAMs. Higher availability of silicon and aluminum and better feasibility of the pastes. Monitoring formation of Si-O-Si and Si-O-Ca networks. Positive influence of the new crystallizations on mechanical resistance after 1000 °C. Densification behavior of K sample contrary to the melting of that Na.
Abstract Thermal performances at 1000 °C of volcanic ash-based alkali-activated materials by both sodium or potassium solutions have been tested. Once defined the feasibility for the potassium set, a multidisciplinary characterization including spectroscopic, thermal, mechanical, diffractometric before and after treatment and dilatometric analyses was applied. The formation kinetics of different networks was evaluated. A correlation between the high mechanical properties and the least amount of water was observed in non-treated samples. Treated samples at 1000 °C showed higher compressive strengths due to the crystallization of wollastonite, leucite and nepheline. Thermal stability was observed increased with the solid content in the potassium-based formulations.
High temperature behavior of sodium and potassium volcanic ashes-based alkali-activated materials (Mt. Etna, Italy)
https://orcid.org/0000-0002-6183-4047
https://orcid.org/0000-0002-8841-283X
https://orcid.org/0000-0001-7559-5764
Graphical abstract Display Omitted
Highlights Evaluation of activating solution influence on high temperature resistance in AAMs. Higher availability of silicon and aluminum and better feasibility of the pastes. Monitoring formation of Si-O-Si and Si-O-Ca networks. Positive influence of the new crystallizations on mechanical resistance after 1000 °C. Densification behavior of K sample contrary to the melting of that Na.
Abstract Thermal performances at 1000 °C of volcanic ash-based alkali-activated materials by both sodium or potassium solutions have been tested. Once defined the feasibility for the potassium set, a multidisciplinary characterization including spectroscopic, thermal, mechanical, diffractometric before and after treatment and dilatometric analyses was applied. The formation kinetics of different networks was evaluated. A correlation between the high mechanical properties and the least amount of water was observed in non-treated samples. Treated samples at 1000 °C showed higher compressive strengths due to the crystallization of wollastonite, leucite and nepheline. Thermal stability was observed increased with the solid content in the potassium-based formulations.
High temperature behavior of sodium and potassium volcanic ashes-based alkali-activated materials (Mt. Etna, Italy)
Scanferla, Paolo (author) / Finocchiaro, Claudio (author) / Gharzouni, Ameni (author) / Barone, Germana (author) / Mazzoleni, Paolo (author) / Rossignol, Sylvie (author)
2023-10-05
Article (Journal)
Electronic Resource
English
Alkali activated fly ashes New cementitious materials for concrete
| British Library Online Contents | 2000