The Experts below are selected from a list of 198 Experts worldwide ranked by ideXlab platform
Annette Eschenbach - One of the best experts on this subject based on the ideXlab platform.
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Ripening reduces the shrinkage of processed Dredged Material
Journal of Soils and Sediments, 2020Co-Authors: Katja Oing, Alexander Gröngröft, Annette EschenbachAbstract:Purpose The utilization of Dredged Material in dike construction as a substitute for traditionally used Materials is considered as an option to preserve natural resources such as marsh sediments. As a prerequisite for this application, the equivalency with respect to soil physical and mechanical properties of the Materials must be assessed. Previous investigations have shown pronounced differences in shrinkage behavior and desiccation cracking between sediments and Dredged Material. The key objective of the study was to assess whether shrinkage of processed Dredged Material can be reduced by further processing, i.e., dewatering, which can be referred to as ripening. Materials and methods To compare the shrinkage behavior of the Materials, three different methods of different scales were applied. Small-scale methods conducted were the standard procedure for the determination of the shrinkage limit and the determination of the coefficient of linear extensibility (COLE_rod). Large-scale shrink-swell experiments were carried out in a specially constructed test system with 90 l capacity for a period of up to 385 days. Here the Materials were ripened, i.e., air-dried, until shrinkage almost ceased, and a rewetting-air-drying cycle was conducted. Shrinkage and swelling were determined during the processes by measuring the changes in volume. On the ripened Materials, COLE_rod was determined. Results and discussion The experiments show that the shrinkage behavior of processed Dredged Material can be ameliorated by ripening. COLE_rod of the ripened Materials were about 20–80% lower than COLE_rod of the un-ripened Materials. The large-scale shrink-swell experiments showed that shrinkage in the second drying cycle amounted to less volume than in the first drying cycle and that shrinkage behavior in contrast to the first drying cycle, where pronounced proportional shrinkage was observed, was dominated by structural and residual shrinkage in this cycle. Conclusions Ripening of processed Dredged Material is considered a useful pre-treatment option to ameliorate the shrink-swell behavior of processed Dredged Material and to obtain a better functional equivalency with traditionally used dike construction Materials such as fine-grained marsh sediments.
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Ripening reduces the shrinkage of processed Dredged Material
Journal of Soils and Sediments, 2019Co-Authors: Katja Oing, Alexander Gröngröft, Annette EschenbachAbstract:Purpose The utilization of Dredged Material in dike construction as a substitute for traditionally used Materials is considered as an option to preserve natural resources such as marsh sediments. As a prerequisite for this application, the equivalency with respect to soil physical and mechanical properties of the Materials must be assessed. Previous investigations have shown pronounced differences in shrinkage behavior and desiccation cracking between sediments and Dredged Material. The key objective of the study was to assess whether shrinkage of processed Dredged Material can be reduced by further processing, i.e., dewatering, which can be referred to as ripening.
Katja Oing - One of the best experts on this subject based on the ideXlab platform.
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Ripening reduces the shrinkage of processed Dredged Material
Journal of Soils and Sediments, 2020Co-Authors: Katja Oing, Alexander Gröngröft, Annette EschenbachAbstract:Purpose The utilization of Dredged Material in dike construction as a substitute for traditionally used Materials is considered as an option to preserve natural resources such as marsh sediments. As a prerequisite for this application, the equivalency with respect to soil physical and mechanical properties of the Materials must be assessed. Previous investigations have shown pronounced differences in shrinkage behavior and desiccation cracking between sediments and Dredged Material. The key objective of the study was to assess whether shrinkage of processed Dredged Material can be reduced by further processing, i.e., dewatering, which can be referred to as ripening. Materials and methods To compare the shrinkage behavior of the Materials, three different methods of different scales were applied. Small-scale methods conducted were the standard procedure for the determination of the shrinkage limit and the determination of the coefficient of linear extensibility (COLE_rod). Large-scale shrink-swell experiments were carried out in a specially constructed test system with 90 l capacity for a period of up to 385 days. Here the Materials were ripened, i.e., air-dried, until shrinkage almost ceased, and a rewetting-air-drying cycle was conducted. Shrinkage and swelling were determined during the processes by measuring the changes in volume. On the ripened Materials, COLE_rod was determined. Results and discussion The experiments show that the shrinkage behavior of processed Dredged Material can be ameliorated by ripening. COLE_rod of the ripened Materials were about 20–80% lower than COLE_rod of the un-ripened Materials. The large-scale shrink-swell experiments showed that shrinkage in the second drying cycle amounted to less volume than in the first drying cycle and that shrinkage behavior in contrast to the first drying cycle, where pronounced proportional shrinkage was observed, was dominated by structural and residual shrinkage in this cycle. Conclusions Ripening of processed Dredged Material is considered a useful pre-treatment option to ameliorate the shrink-swell behavior of processed Dredged Material and to obtain a better functional equivalency with traditionally used dike construction Materials such as fine-grained marsh sediments.
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Ripening reduces the shrinkage of processed Dredged Material
Journal of Soils and Sediments, 2019Co-Authors: Katja Oing, Alexander Gröngröft, Annette EschenbachAbstract:Purpose The utilization of Dredged Material in dike construction as a substitute for traditionally used Materials is considered as an option to preserve natural resources such as marsh sediments. As a prerequisite for this application, the equivalency with respect to soil physical and mechanical properties of the Materials must be assessed. Previous investigations have shown pronounced differences in shrinkage behavior and desiccation cracking between sediments and Dredged Material. The key objective of the study was to assess whether shrinkage of processed Dredged Material can be reduced by further processing, i.e., dewatering, which can be referred to as ripening.
Alexander Gröngröft - One of the best experts on this subject based on the ideXlab platform.
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Ripening reduces the shrinkage of processed Dredged Material
Journal of Soils and Sediments, 2020Co-Authors: Katja Oing, Alexander Gröngröft, Annette EschenbachAbstract:Purpose The utilization of Dredged Material in dike construction as a substitute for traditionally used Materials is considered as an option to preserve natural resources such as marsh sediments. As a prerequisite for this application, the equivalency with respect to soil physical and mechanical properties of the Materials must be assessed. Previous investigations have shown pronounced differences in shrinkage behavior and desiccation cracking between sediments and Dredged Material. The key objective of the study was to assess whether shrinkage of processed Dredged Material can be reduced by further processing, i.e., dewatering, which can be referred to as ripening. Materials and methods To compare the shrinkage behavior of the Materials, three different methods of different scales were applied. Small-scale methods conducted were the standard procedure for the determination of the shrinkage limit and the determination of the coefficient of linear extensibility (COLE_rod). Large-scale shrink-swell experiments were carried out in a specially constructed test system with 90 l capacity for a period of up to 385 days. Here the Materials were ripened, i.e., air-dried, until shrinkage almost ceased, and a rewetting-air-drying cycle was conducted. Shrinkage and swelling were determined during the processes by measuring the changes in volume. On the ripened Materials, COLE_rod was determined. Results and discussion The experiments show that the shrinkage behavior of processed Dredged Material can be ameliorated by ripening. COLE_rod of the ripened Materials were about 20–80% lower than COLE_rod of the un-ripened Materials. The large-scale shrink-swell experiments showed that shrinkage in the second drying cycle amounted to less volume than in the first drying cycle and that shrinkage behavior in contrast to the first drying cycle, where pronounced proportional shrinkage was observed, was dominated by structural and residual shrinkage in this cycle. Conclusions Ripening of processed Dredged Material is considered a useful pre-treatment option to ameliorate the shrink-swell behavior of processed Dredged Material and to obtain a better functional equivalency with traditionally used dike construction Materials such as fine-grained marsh sediments.
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Ripening reduces the shrinkage of processed Dredged Material
Journal of Soils and Sediments, 2019Co-Authors: Katja Oing, Alexander Gröngröft, Annette EschenbachAbstract:Purpose The utilization of Dredged Material in dike construction as a substitute for traditionally used Materials is considered as an option to preserve natural resources such as marsh sediments. As a prerequisite for this application, the equivalency with respect to soil physical and mechanical properties of the Materials must be assessed. Previous investigations have shown pronounced differences in shrinkage behavior and desiccation cracking between sediments and Dredged Material. The key objective of the study was to assess whether shrinkage of processed Dredged Material can be reduced by further processing, i.e., dewatering, which can be referred to as ripening.
Fred S Williams - One of the best experts on this subject based on the ideXlab platform.
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reclamation of solid waste landfills by capping with Dredged Material
Journal of Hazardous Materials, 1997Co-Authors: Ram K Mohan, John B Herbich, L R Hossner, Fred S WilliamsAbstract:Abstract A cost-effective method for reclaiming solid waste landfills by capping with clayey Dredged Material is illustrated in this paper using a closure design developed for bauxite residue landfills in Texas. The design consisted of capping the landfills with Dredged Material obtained from maintenance dredging at a nearby bay and establishing a vegetative layer on the cap using salt-tolerant plant species. A research methodology comprised of laboratory cylinder tests, field revegetation tests and computer-based transport modeling was used to evaluate the effectiveness of the various capping alternatives and to select the final design parameters for the landfill. Results from this study indicated that a cap consisting of a 0.31 m (1.0 ft) sandy Dredged Material layer (topsoil layer for establishing vegetation) underlain by a 0.61 m (2.0 ft) clayey Dredged Material layer (low permeability layer) can be used as an effective barrier for closure of solid waste landfills yielding effective isolation of the waste from the environment. The design developed in this study can be applied to other similar solid waste sites with minor modifications depending upon the waste properties, site characteristics, and closure requirements of the facility.
Nicholas L. Clesceri - One of the best experts on this subject based on the ideXlab platform.
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Commercialization of Dredged‐Material Decontamination Technologies
Remediation Journal, 1998Co-Authors: Keith W. Jones, Anthony J. Guadagni, Kerwin R. Donato, E. A. Stern, Nicholas L. ClesceriAbstract:This article describe a unique federal project aimed at the commercialization of different technologies for the decontamination of Dredged Material. The project is organized so that commercialization is achieved in a seamless way, starting with validation at the bench- and pilot-scale levels, and ending with the actual construction of operational facilities. This is the first integrated sediment decontamination program in which a step-wise bench-scale validation process of innovative/emerging technologies will scale-up to a production-scale facility capable of processing up to 375,000 m3 of Dredged Material per year. The need to develop public-private partnerships for the facility construction is emphasized as a way of obtaining adequate finding for capital and operating costs during the startup time of the commercialization process. It is expected that the end result of the project work will be the creation of economically-viable, self-sustaining decontamination technology companies.
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Processing Contaminated Dredged Material From the Port of
1998Co-Authors: New York-new Jersey, K. W. Jones, E. A. Stern, K. Donato, Nicholas L. ClesceriAbstract:Shipping activities in the Port of New York-NewJersey are currently threatened by restrictions on dredging of navigational channels and private berthing areas because of concerns about the environmental effects caused by ocean disposal of the Dredged Material. Current proposals for solutions to the problem include ocean disposal of uncontam- inated Material, use of confined disposal facilities (both upland facilities and containment islands), subaqueous borrow pits, and processing and treatment for contaminated Materials. A project to produce a complete "treatment train" for processing and decontaminating Dredged Material is described. The work is divided into several phases: treatability studies of commercial and nonproprietary technologies at volumes of 19 liters (bench scale) and up to 19 m3 (pilot scale); specification of a treatment train; and implementation of a large-scale facility that can process 76,000-382,000 m3 of Dredged Material per year. The goal is to achieve operational status for the facility by the end of 1999.
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commercialization of Dredged Material decontamination technologies
Remediation Journal, 1998Co-Authors: K. W. Jones, Anthony J. Guadagni, Kerwin R. Donato, E. A. Stern, Nicholas L. ClesceriAbstract:This article describe a unique federal project aimed at the commercialization of different technologies for the decontamination of Dredged Material. The project is organized so that commercialization is achieved in a seamless way, starting with validation at the bench- and pilot-scale levels, and ending with the actual construction of operational facilities. This is the first integrated sediment decontamination program in which a step-wise bench-scale validation process of innovative/emerging technologies will scale-up to a production-scale facility capable of processing up to 375,000 m3 of Dredged Material per year. The need to develop public-private partnerships for the facility construction is emphasized as a way of obtaining adequate finding for capital and operating costs during the startup time of the commercialization process. It is expected that the end result of the project work will be the creation of economically-viable, self-sustaining decontamination technology companies.
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Processing of NY/NJ Harbor estuarine Dredged Material
1997Co-Authors: K. W. Jones, E. A. Stern, K. Donato, Nicholas L. ClesceriAbstract:Management of contaminated Dredged Material is a major problem for the ports and harbors of the US. One attractive solution to processing the Dredged Material is to remove or stabilize the contaminants and produce a Material suitable for beneficial use or unrestricted upland disposal. The components of a comprehensive Dredged Material processing project designed for treatment of the estuarine sediments found in the Port of NY-NJ are described.
