The
observed decrease, over time, in the concentrations of the pollutants indicated that the latter are
immobilized in the hydrated matrix, due to the formation of new hydration products, i.e. mono- and
hemi-carboaluminate and Friedel’s salt, and changes associated with pore diameter and distribution. The
addition of selected types of recycled aggregates, to the above-described composite material was also
investigated, and it was found that a useful material having similar properties could be obtained. This
means that such composite materials could be used as low flow material or back fill, road base stabilization
material and bedding material for pipes and cables, as well as for daily or intermediate landfill
covers. From the point of view of sustainable development, this kind of waste management presents an
optimum e zero waste solution, since it results in the cleaner production, while preserving natural resources,
reducing CO2 emissions, and lowering the costs of sewage sludge management.
Theobserved decrease, over time, in the concentrations of the pollutants indicated that the latter areimmobilized in the hydrated matrix, due to the formation of new hydration products, i.e. mono- andhemi-carboaluminate and Friedel’s salt, and changes associated with pore diameter and distribution. Theaddition of selected types of recycled aggregates, to the above-described composite material was alsoinvestigated, and it was found that a useful material having similar properties could be obtained. Thismeans that such composite materials could be used as low flow material or back fill, road base stabilizationmaterial and bedding material for pipes and cables, as well as for daily or intermediate landfillcovers. From the point of view of sustainable development, this kind of waste management presents anoptimum e zero waste solution, since it results in the cleaner production, while preserving natural resources,reducing CO2 emissions, and lowering the costs of sewage sludge management.
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