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- Title
CELLULAR GRAVEL OF SLAG AND COAL ASH MADE BY AN UNCONVENTIONAL HEAT TREATMENT METHOD.
- Authors
PAUNESCU, Lucian; AXINTE, Sorin Mircea; DRAGOESCU, Marius Florin
- Abstract
The paper presents authors' original contributions in the experimental manufacturing process of cellular gravels with good thermal insulation properties (bulk density between 0.29-0.38 g/cm3and thermal conductivity between 0.092-0.105 W/m·K) and very high compressive strength (between 12.6-14.2 MPa). Unlike all heat treatment processes used in the world in this domain, the heating technique is unconventional based on the direct microwave irradiation. As a result, the heating rate reached very high values (32.3-40.1 °C/min) without affecting the structural homogeneity of products. Another originality of the work is the use as raw material of other silicate waste (blast furnace slag and coal fly ash) except glass waste, which seemed technologically irreplaceable.
- Subjects
COAL ash; HEAT treatment; MICROWAVE heating; FLY ash; GLASS waste; SLAG; THERMAL insulation
- Publication
Academic Journal of Manufacturing Engineering, 2022, Vol 20, Issue 1, p27
- ISSN
1583-7904
- Publication type
Article