Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Dredged Material Stabilization: The Role of Mellowing on Cured Properties
This study presents the results of a treatability study for DM stabilization using fifteen combinations of stabilizing agents (lime, Cement Kiln Dust (CKD), fly ash). Two paste studies were conducted, both employing a mellowing period of up to 5 days under open and closed conditions, respectively. To illustrate the impacts of the different mellowing conditions on the characteristics of the stabilized DM, select physicochemical, geotechnical and mineralogical differences of the two sample sets are presented. Mellowing under closed conditions yielded non-compactable material for 10 of 15 blends, as the moisture content was too high. Conversely, open mellowing yielded compactable material for all blends as early as 2 days. The mineralogical analyses showed that cement reactions proceeded more slowly under closed conditions. Compaction curves generated for two blends under open and closed conditions yielded contradictory results in terms of blend performance, the higher densities being obtained under open conditions. Consequently, since open mellowing more closely resembles field conditions, it is recommended as a procedure prior to curing in future S/S paste studies.
Dredged Material Stabilization: The Role of Mellowing on Cured Properties
This study presents the results of a treatability study for DM stabilization using fifteen combinations of stabilizing agents (lime, Cement Kiln Dust (CKD), fly ash). Two paste studies were conducted, both employing a mellowing period of up to 5 days under open and closed conditions, respectively. To illustrate the impacts of the different mellowing conditions on the characteristics of the stabilized DM, select physicochemical, geotechnical and mineralogical differences of the two sample sets are presented. Mellowing under closed conditions yielded non-compactable material for 10 of 15 blends, as the moisture content was too high. Conversely, open mellowing yielded compactable material for all blends as early as 2 days. The mineralogical analyses showed that cement reactions proceeded more slowly under closed conditions. Compaction curves generated for two blends under open and closed conditions yielded contradictory results in terms of blend performance, the higher densities being obtained under open conditions. Consequently, since open mellowing more closely resembles field conditions, it is recommended as a procedure prior to curing in future S/S paste studies.
Dredged Material Stabilization: The Role of Mellowing on Cured Properties
Grubb, Dennis G. (Autor:in) / Chrysochoou, Maria (Autor:in) / Smith, Charles J. (Autor:in)
GeoCongress 2008 ; 2008 ; New Orleans, Louisiana, United States
GeoCongress 2008 ; 772-779
07.03.2008
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
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