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[108230] Artykuł: The Influence of Sewage Sludge Content and Sintering Temperature on Selected Properties of Lightweight Expanded Clay AggregateCzasopismo: Materials Tom: 14, Zeszyt: 12, Strony: 1-18ISSN: 1996-1944 Opublikowano: Czerwiec 2021 Autorzy / Redaktorzy / Twórcy Grupa MNiSW: Publikacja w czasopismach wymienionych w wykazie ministra MNiSzW (część A) Punkty MNiSW: 140 ![]() Keywords: lightweight expanded clay aggregate  sewage sludge  sintering temperature  density  porosity  water absorption  statistical model  recycling  |
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.