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Valorization of Dredged Sediments as Sustainable Construction Resources

Valorization of Dredged Sediments as Sustainable Construction Resources
Author: Amine El Mahdi Safhi
Publisher: CRC Press
Total Pages: 104
Release: 2022-08-31
Genre: Technology & Engineering
ISBN: 1000779823

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Valorization of Dredged Sediments as Sustainable Construction Resources provides a comprehensive and up-to-date overview of research on the reuse of sediments as a raw material for civil engineering fields. Dredging is increasing in scale worldwide, while deep sea disposal is being eliminated and landfill disposal is becoming less sustainable. Yet these sediments offer a potentially useful resource for constructing pavements, soil, bricks, ceramic and clinker, for they provide fine and lightweight aggregates, supplementary cementitious materials and geopolymer binders. This has sparked considerable research on valorization, which is presented here. Covers the main re-uses of sediments and the valorization required Focuses on state-of-the-art research on practical guidance Discusses limitations and future perspectives for sediments valorization The book suits researchers and students working in the area, as well as industrial engineers and professionals working on recycling and dredging.


Use of Dredged Sediments from Newark Harbor for Geotechnical Applications

Use of Dredged Sediments from Newark Harbor for Geotechnical Applications
Author: MH. Maher
Publisher:
Total Pages: 13
Release: 2000
Genre: Beneficial reuse
ISBN:

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Under the Joint Dredging Plan for the Port of New York and New Jersey, New Jersey has committed to using stabilized dredged material for beneficial reuse. Under the short-term planning (1997-2000), an annual average of 1.39 million cubic meters of dredged material must be used. Laboratory tests were conducted to investigate the geotechnical properties of the Newark Harbor dredged sediments stabilized with portland cement. The material properties and strength characteristics were investigated using soil characterization, California Bearing Ratio, unconfined compression, unconsolidated undrained and consolidated undrained triaxial compression, and resilient modulus tests. Currently, portland cement stabilized dredged material is being placed as a subgrade layer for a future parking lot. Cone penetration testing was conducted on the material to evaluate the in-situ density of the deeper, compacted layers. Nuclear density tests were also conducted to verify compaction of the material. Correlations between the two in situ tests were developed to analyze the two-meter-deep structural fill.


Variability in Geotechnical Properties of Sediments and Dredged Materials

Variability in Geotechnical Properties of Sediments and Dredged Materials
Author:
Publisher:
Total Pages: 0
Release: 2004
Genre:
ISBN:

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This technical note provides an overview of selected uncertainties involved in estimating or characterizing pre-dredged sediment and dredged material geotechnical properties. Variations in geotechnical properties of dredged materials and sediments are expected to be similar to those found in typical geotechnical materials, but this technical note addresses some of the unique aspects of identifying and evaluating the variability of selected material properties before, during, and after dredging operations.


Effects of Amendment Materials on Cement-Solidified Contaminated Marine Sediments--Mechanical Stability and Leaching of Heavy Metals

Effects of Amendment Materials on Cement-Solidified Contaminated Marine Sediments--Mechanical Stability and Leaching of Heavy Metals
Author: M. Kvennås
Publisher:
Total Pages: 18
Release: 2009
Genre: Consolidation
ISBN:

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Stabilization/solidification technology (S/S), in which contaminated marine sediments are mixed with cement and other binding agents have shown to be a promising remediation technique. The major advantage of S/S over other contaminated sediments remediation techniques is that dredged material can be transformed from a soft material into a filling material with favorable geotechnical properties. Reduced contaminant transport from the treated material is achieved simultaneously. This paper summarizes a study investigating how amendments (additions) may improve the mechanical properties and reduce leaching of heavy metals of two cement-stabilized marine harbor sediments from the cities of Bergen and Hammer-fest, Norway. The deployed amendments comprised granulated blast furnace slag (Merit®), cement kiln dust, fly ash, gypsum, sand, iron sulfide, and microsilica. The use of amendments was observed to improve the strength of cement-stabilized soft and wet sediments, where the use of granulated blast furnace slag (Merit) resulted in the greatest inprovement. Cement stabilization resulted in a reduced leaching of lead, whereas the leaching of copper and chromium from Hammerfest sediments increased substantially. In order to achieve the lowest total net transport of contaminants through the material, S/S recipes for environmental projects should not only be optimized with regard to physical strength, but also with regard to leaching and permeability.


Geotechnics of High Water Content Materials

Geotechnics of High Water Content Materials
Author: Tuncer B. Edil
Publisher: ASTM International
Total Pages: 398
Release: 2000
Genre: Soil mechanics
ISBN: 080312855X

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Reasonable estimates indicate that approximately a billion cubic meters of high water content soil-like wastes are produced annually worldwide, and a large portion of these are deposited hydraulically in diked impoundment areas, some of which are among the largest earth structures in the world. The major problems emanating from this disposal method are the difficulty in dewatering the wastes, their low strength and hydraulic conductivity, their high compressibility, their potential to contaminate the groundwater, the stability of the confining dikes, and the ultimate reclamation of the disturbed land. Following a brief explanation of how many of these wastes are generated, quantitative values for key engineering properties are summarized and compared for a wide variety of waste materials and some reference soils. Then, many concepts that have been applied with success will be presented together with the advantages each offers, the difficulties involved in using it, and the limitations in our knowledge. Discussed briefly will be state-of-practice developments in mathematical modeling, laboratory testing and associated interpretations, and material property formulations.


Science and Technology of Concrete Admixtures

Science and Technology of Concrete Admixtures
Author: Pierre-Claude Aïtcin
Publisher: Woodhead Publishing
Total Pages: 668
Release: 2015-11-12
Genre: Technology & Engineering
ISBN: 0081006969

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Science and Technology of Concrete Admixtures presents admixtures from both a theoretical and practical point-of-view. The authors emphasize key concepts that can be used to better understand the working mechanisms of these products by presenting a concise overview on the fundamental behavior of Portland cement and hydraulic binders as well as their chemical admixtures, also discussing recent effects in concrete in terms of rheology, mechanics, durability, and sustainability, but never forgetting the fundamental role played by the water/binder ratio and proper curing in concrete technology. Part One presents basic knowledge on Portland cement and concrete, while Part Two deals with the chemical and physical background needed to better understand what admixtures are chemically, and through which mechanism they modify the properties of the fresh and hardened concrete. Subsequent sections present discussions on admixtures technology and two particular types of concrete, self-consolidating and ultra-high strength concretes, with final remarks on their future. Combines the knowledge of two leading authors to present both the scientific and technology of admixtures Explains what admixtures are from a chemical point-of-view and illustrates by which mechanisms they modify the properties of fresh and hardened concrete Presents a fundamental, practical, and innovative reference book on the topic Contains three detailed appendices that can be used to learn how to use admixtures more efficiently


Dredging and Management of Dredged Material

Dredging and Management of Dredged Material
Author: Jay N. Meegoda
Publisher:
Total Pages: 216
Release: 1997
Genre: Technology & Engineering
ISBN:

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GSP 65 contains 13 papers presented at three sessions on dredging and management of dredged material at GeoLogan '97, held in Logan, Utah, July 18, 1997.