Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Accelerated carbonatation of sewage sludge-cement-sand mortars and its environmental impact
One of the main objectives of this work is to present an effective alternative for the final destination of sludge from urban waste water treatment plants by its use as a component of mortar or concrete. Assessment of the environmental quality of the final product and the consequent guarantee of its use in the building industry demand that it meets a number of requisites, one of which is that the effluents extracted by water action should be contamination-free or at least that the concentration of contaminants should be below certain preset limits. To this end, a durability study was performed on the system. The study consisted in subjecting the mortar samples to a process of accelerated carbonation and subsequently assessing the products of the carbonation by 29Si RNM-MA nuclear magnetic resonance of solids and its environmental impact by the NEN-7345 monolithic leaching test. Carbonation at very high concentrations of CO2 favours the polymerization of the C-S-H and the breakdown of the ettringite, which affects the leaching processes and the concentration of heavy metals and other pollutants in the leachates obtained from the NEN 7345 leaching test.
Accelerated carbonatation of sewage sludge-cement-sand mortars and its environmental impact
One of the main objectives of this work is to present an effective alternative for the final destination of sludge from urban waste water treatment plants by its use as a component of mortar or concrete. Assessment of the environmental quality of the final product and the consequent guarantee of its use in the building industry demand that it meets a number of requisites, one of which is that the effluents extracted by water action should be contamination-free or at least that the concentration of contaminants should be below certain preset limits. To this end, a durability study was performed on the system. The study consisted in subjecting the mortar samples to a process of accelerated carbonation and subsequently assessing the products of the carbonation by 29Si RNM-MA nuclear magnetic resonance of solids and its environmental impact by the NEN-7345 monolithic leaching test. Carbonation at very high concentrations of CO2 favours the polymerization of the C-S-H and the breakdown of the ettringite, which affects the leaching processes and the concentration of heavy metals and other pollutants in the leachates obtained from the NEN 7345 leaching test.
Accelerated carbonatation of sewage sludge-cement-sand mortars and its environmental impact
Vazquez, E. (Autor:in) / Valls, S. (Autor:in)
Cement and Concrete Research ; 31 ; 1271-1276
2001
6 Seiten, 10 Quellen
Aufsatz (Zeitschrift)
Englisch
Accelerated carbonatation of sewage sludge-cement-sand mortars and its environmental impact
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