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The main aim of the research was to evaluate the feasibility of using recycled ceramics and
ash from municipal sewage sludge as concrete fillers. As part of the study, standard cylindrical and
cubic samples were investigated. The samples consisted of waste ceramic aggregate fractions 0–4 mm
and 4–8 mm, which were sourced from used products manufactured by a sanitary fittings factory,
as well as ash from one of the Polish sewage treatment plants. The chemical composition and mor-
phology of recycled materials used to produce concrete were examined. The research itself focused
on determining the strength properties of the produced composites under both normal conditions
and after initial heat treatment. Microstructural tests of the produced composites were also carried
out. The results demonstrated that selected recycled materials can successfully replace materials
previously used in concrete production. The obtained strength results do not differ significantly from
the strength of concrete made of traditional materials. Research has confirmed the possibility of using
waste materials as concrete fillers.
