Details zur Publikation

Kategorie Textpublikation
Referenztyp Zeitschriften
DOI 10.1016/j.jobe.2020.101904
Volltext Autorenversion
Titel (primär) Optimization of microstructure of basalt-based fibers intended for improved thermal and acoustic insulations
Autor Farouk, M.; Soltan, A.; Schlüter, S.; Hamzawy, E.; Farrag, A.; El-Kammar, A.; Yahia, A.; Pollmann, H.
Quelle Journal of Building Engineering
Erscheinungsjahr 2021
Department BOSYS
Band/Volume 34
Seite von art. 101904
Sprache englisch
Topic T5 Future Landscapes
Keywords Basalt; fiber; wool; Cupola; insulation
Abstract

Batch compositions of basalt and dolomite were optimized to produce high-quality fibers and wool boards applying Cupola technology. The raw batches, cinders, single fibers and fabricated wool boards have been characterized using XRD, XRF, SEM-EDAX, μ-X-ray CT, Lambda meter, mechanical and acoustic testing procedures according to ASTM and EN standards.

The CaO/MgO ratio, acidity, basicity and melting moduli of the basaltic cinders are mainly related to the basalt low content of Mg-bearing minerals (19.15wt.%). The single fibers diameter (8.60μm), non-fibrous shots (13.00wt.%) and Al2O3 (14.08wt.%) contents together with the quasi-horizontal macrostructure (SL-C=0.60) improve the wool boards compressive (14.29Kpa) and tensile (3.00Kpa) strength as well as point load (140.00N) properties.

The single fibers microchemistry shows their enrichment with thermal conductivity ceasing oxides (∑=65.02wt.%) which together with the average porosity (92.30%) enhance the thermal (32.43mW/mK and 6.17m2K/W) and acoustic (1.00 αs and 1.05 NRC) wool board insulations.

The fabricated wool boards mechanical, thermal, acoustic and fire insulation characteristics are improved 28.00-, 2.35-, 1.40- and 45.45-times greater than the adopted EN standards, respectively.

dauerhafte UFZ-Verlinkung https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=23799
Farouk, M., Soltan, A., Schlüter, S., Hamzawy, E., Farrag, A., El-Kammar, A., Yahia, A., Pollmann, H. (2021):
Optimization of microstructure of basalt-based fibers intended for improved thermal and acoustic insulations
J. Build. Eng. 34 , art. 101904 10.1016/j.jobe.2020.101904