Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Reuse of cement-solidified municipal incinerator fly ash in cement mortars: Physico-mechanical and leaching characteristics
The reuse of cement-solidified MSWI (Municipal Solid Waste Incinerator) fly ash (S/S product (solidified/stabilised)) as an artificial aggregate in Portland cement mortars was investigated. The S/S product consisted of a mixture of 48 wt.% washed MSWI fly ash, 20 wt.% Portland cement and 32 wt.% water, aged for 365 days at 20 deg C and 100% RH. Cement mortars (water/cement weight ratio = 0.62) were made with Portland cement, S/S product and natural sand at three replacement levels of sand with S/S product (0%, 10% and 50% by mass). After 28 days of curing at 20 deg C and 100% RH (relative humidity), the mortar specimens were characterised for their physico-mechanical (porosity, compressive strength) and leaching behaviour. No retardation in strength development, relatively high compressive strengths (up to 36 N/mm2) and low leaching rates of heavy metals (Cr, Cu, Pb and Zn) were always recorded. The leaching data from sequential leach tests on monolithic specimens were successfully elaborated with a pseudo-diffusional model including a chemical retardation factor related to the partial dissolution of contaminant.
Reuse of cement-solidified municipal incinerator fly ash in cement mortars: Physico-mechanical and leaching characteristics
The reuse of cement-solidified MSWI (Municipal Solid Waste Incinerator) fly ash (S/S product (solidified/stabilised)) as an artificial aggregate in Portland cement mortars was investigated. The S/S product consisted of a mixture of 48 wt.% washed MSWI fly ash, 20 wt.% Portland cement and 32 wt.% water, aged for 365 days at 20 deg C and 100% RH. Cement mortars (water/cement weight ratio = 0.62) were made with Portland cement, S/S product and natural sand at three replacement levels of sand with S/S product (0%, 10% and 50% by mass). After 28 days of curing at 20 deg C and 100% RH (relative humidity), the mortar specimens were characterised for their physico-mechanical (porosity, compressive strength) and leaching behaviour. No retardation in strength development, relatively high compressive strengths (up to 36 N/mm2) and low leaching rates of heavy metals (Cr, Cu, Pb and Zn) were always recorded. The leaching data from sequential leach tests on monolithic specimens were successfully elaborated with a pseudo-diffusional model including a chemical retardation factor related to the partial dissolution of contaminant.
Reuse of cement-solidified municipal incinerator fly ash in cement mortars: Physico-mechanical and leaching characteristics
Cinquepalmi, Maria Anna (Autor:in) / Mangialardi, Teresa (Autor:in) / Panei, Liliana (Autor:in) / Paolini, Antonio Evangelista (Autor:in) / Piga, Luigi (Autor:in)
Journal of Hazardous Materials ; 151 ; 585-593
2008
9 Seiten, 8 Bilder, 3 Tabellen, 26 Quellen
Aufsatz (Zeitschrift)
Englisch
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Use of incinerator ash as a replacement for cement and sand in cement mortars
| British Library Online Contents | 2005