The Influence of Sewage Sludge Content and Sintering Temperature on Selected Properties of Lightweight Expanded Clay Aggregate

Wastewater treatment processes produce sewage sludge (SS), which, in line with environmental sustainability principles, can be a valuable source of matter in the production of lightweight expanded clay aggregate (LECA). The literature on the influence of SS content and sintering temperature on the p...

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Bibliographic Details
Published in:Materials 2021-06, Vol.14 (12), p.3363
Main Authors: Latosińska, Jolanta, Żygadło, Maria, Czapik, Przemysław
Format: Article
Language:English
Subjects:
Bulk density
Clay
Experiments
Laboratories
Lightweight
Physical properties
Porosity
Sewage sludge
Sintering
Sintering (powder metallurgy)
Sludge
Variables
Viscosity
Wastewater treatment
Water absorption
Water treatment
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Summary:Wastewater treatment processes produce sewage sludge (SS), which, in line with environmental sustainability principles, can be a valuable source of matter in the production of lightweight expanded clay aggregate (LECA). The literature on the influence of SS content and sintering temperature on the properties of LECA is scarce. This paper aims to statistically evaluate the effects of SS content and sintering temperature on LECA physical properties. Total porosity, pore volume, and apparent density were determined with the use of a density analyzer. A helium pycnometer was utilized to determine the specific density. Closed porosity was calculated. The test results demonstrated a statistically significant influence of the SS content on the specific density and water absorption of LECA. The sintering temperature had a significant effect on the specific density, apparent density, total porosity, closed porosity, total volume of pores, and water absorption. It was proved that a broad range of the SS content is admissible in the raw material mass for the production of LECA.
ISSN:1996-1944
1996-1944
DOI:10.3390/ma14123363