| Title |
Hybrid Fly Ash-Based Geopolymeric Foams: Microstructural, Thermal and Mechanical Properties |
| ID_Doc |
7139 |
| Authors |
Roviello, G; Ricciotti, L; Molino, AJ; Menna, C; Ferone, C; Asprone, D; Cioffi, R; Ferrandiz-Mas, V; Russo, P; Tarallo, O |
| Title |
Hybrid Fly Ash-Based Geopolymeric Foams: Microstructural, Thermal and Mechanical Properties |
| Year |
2020 |
| Published |
Materials, 13, 13 |
| DOI |
10.3390/ma13132919 |
| Abstract |
This research investigates the preparation and characterization of new organic-inorganic geopolymeric foams obtained by simultaneously reacting coal fly ash and an alkali silicate solution with polysiloxane oligomers. Foaming was realized in situ using Si(0)as a blowing agent. Samples with density ranging from 0.3 to 0.7 g/cm(3)that show good mechanical properties (with compressive strength up to approximate to 5 MPa for a density of 0.7 g/cm(3)) along with thermal performances (lambda = 0.145 +/- 0.001 W/m center dot K for the foamed sample with density 0.330 g/cm(3)) comparable to commercial lightweight materials used in the field of thermal insulation were prepared. Since these foams were obtained by valorizing waste byproducts, they could be considered as low environmental impact materials and, hence, with promising perspectives towards the circular economy. |
| Author Keywords |
hybrid foams; lightweight material; geopolymer; fly ash; polysiloxanes; microtomography; thermal conductivity; mechanical properties |
| Index Keywords |
Index Keywords |
| Document Type |
Other |
| Open Access |
Open Access |
| Source |
Science Citation Index Expanded (SCI-EXPANDED) |
| EID |
WOS:000555010800001 |
| WoS Category |
Chemistry, Physical; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering; Physics, Applied; Physics, Condensed Matter |
| Research Area |
Chemistry; Materials Science; Metallurgy & Metallurgical Engineering; Physics |
| PDF |
https://www.mdpi.com/1996-1944/13/13/2919/pdf?version=1593525998
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