Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Durability of stabilised galvanic sewage sludge against the impact of sea water and sulfate solutions
Solidification of industrial sludge in concrete matrices has been examined. The concrete mixes in which galvanic sewage sludge was immobilised were prepared with the use of two binder types: Portland-fly ash cement CEM II/B-V, and a binder composed of Portland cement (60%) and fly ash obtained from fluidized bed combustion of fuels (40%). Leaching of heavy metals (Cr, Cd, Zn, Ni, Cu, Pb, V) was observed from solidification matrices which had been exposed to various aqueous media (distilled water, sea water, sulfate solution) over a long period of time. Features of concrete were also studied which could directly influence the release of heavy metals, i. e. their microstructures and microporosity. Moreover, the effect of sewage sludge addition was shown on physical and mechanical properties of concrete, i. e. compression strength, water absorbability and water penetration depth were analysed. The research programme covered the periods of 1 year and 2 years, during which the concrete samples were stored in various aqueous environments. The stability parameters of the matrix which contained fly-ash from fluidized bed combustion of fuels were found not to be much different from the parameters for the matrix which was based on the Portland-fly ash cement. Leachability of heavy metals was demonstrated to increase in the aggressive aqueous medium as compared to the level obtained when the samples were stored in distilled water.
Durability of stabilised galvanic sewage sludge against the impact of sea water and sulfate solutions
Solidification of industrial sludge in concrete matrices has been examined. The concrete mixes in which galvanic sewage sludge was immobilised were prepared with the use of two binder types: Portland-fly ash cement CEM II/B-V, and a binder composed of Portland cement (60%) and fly ash obtained from fluidized bed combustion of fuels (40%). Leaching of heavy metals (Cr, Cd, Zn, Ni, Cu, Pb, V) was observed from solidification matrices which had been exposed to various aqueous media (distilled water, sea water, sulfate solution) over a long period of time. Features of concrete were also studied which could directly influence the release of heavy metals, i. e. their microstructures and microporosity. Moreover, the effect of sewage sludge addition was shown on physical and mechanical properties of concrete, i. e. compression strength, water absorbability and water penetration depth were analysed. The research programme covered the periods of 1 year and 2 years, during which the concrete samples were stored in various aqueous environments. The stability parameters of the matrix which contained fly-ash from fluidized bed combustion of fuels were found not to be much different from the parameters for the matrix which was based on the Portland-fly ash cement. Leachability of heavy metals was demonstrated to increase in the aggressive aqueous medium as compared to the level obtained when the samples were stored in distilled water.
Durability of stabilised galvanic sewage sludge against the impact of sea water and sulfate solutions
Krol, Anna (Autor:in)
Environment Protection Engineering ; 38 ; 29-40
2012
12 Seiten, 3 Bilder, 6 Tabellen, 17 Quellen
Aufsatz (Zeitschrift)
Englisch
aggressives Medium , Anodenschlamm , Beton , Betonkorrosion , destilliertes Wasser , Eindringtiefe , Flugasche , Flugaschenzement , Forschungsprogramm , Klärschlammverwertung , Langzeitversuch , Meerwasser , Mikrostruktur , Portlandzement , Schwermetalle , Schwermetallion , Sulfat , wässriges Medium
Characterization of Stabilised Sewage Sludge for Reuse in Road Pavement
| DOAJ | 2022
| British Library Conference Proceedings | 2000
Durability study of a sewage sludge-cement-sand system and its environmental impact
| British Library Conference Proceedings | 2000
Utilization of Galvanic Enterprises Sewage
| TIBKAT | 2021
Durability of Cement Stabilised Low Level Wastes
| British Library Conference Proceedings | 1997