Feasibility of the reuse of total and processed contaminated marine sediments as fine aggregates in cemented mortars

Couvidat, Julien; Benzaazoua, Mostafa; Chatain, Vincent; Bouamrane, A.; Bouzahzah, Hassan

doi:10.1016/j.conbuildmat.2016.02.186

Cited by 43 publications

(23 citation statements)

References 46 publications

(60 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…As the AP is lower than the NP, we can suppose that this sediment will not release acidic leachates. Even if this is the case, in order to prevent the dispersion of the contaminants by other possible mechanisms, a treatment and/or valorization could be envisaged, in civil engineering or the road-building domain, for example (Couvidat et al, 2016a;Saussaye et al, 2016;Bao et al, 2016).…”

Section: Resultsmentioning

confidence: 99%

“…Therefore, even though the sediments are strongly buffered, it is necessary to prevent all risk of leaching of the pollutants they contain by other mechanisms such as ORP modification, or by percolation of a chelating agent (Bäckström et al, 2004;Mayer et al, 2008). A treatment could be envisaged, even valorization, for example in a road building material, or in civil engineering by treatment with hydraulic binders (Paria and Yuet, 2006;Pinto et al, 2011;Wang et al, 2012;Couvidat et al, 2016a;Bao et al, 2016;Saussaye et al, 2016).…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Characterization of how contaminants arise in a dredged marine sediment and analysis of the effect of natural weathering

Couvidat

Chatain

Bouzahzah

et al. 2018

Science of The Total Environment

Self Cite

View full text Add to dashboard Cite

Millions of tons of contaminated sediments are dredged each year from the main harbors in France. When removed from water, these sediments are very reactive, therefore their geochemical behavior must be understood in order to avoid dispersion of contaminated lixiviates in the surrounding soils. In this objective, it is necessary to evaluate the principal physicochemical parameters, and also achieve advanced mineralogical characterization. These studied sediments are highly contaminated by metals, notably copper (1445 and 835mg/kg, in the unweathered and naturally-weathered sediments, respectively), lead (760 and 1260mg/kg, respectively), zinc (2085 and 2550mg/kg, respectively), as well as by organic contaminants (PAH, PCB) and organometallics (organotins). A high concentration of sulfide minerals was also observed both in the unweathered sediment preserved under water (3.4wt% of pyrite especially), and in the naturally weathered sediment (2wt% pyrite), and in particular framboïdal pyrite was observed in the two materials. The presence of reactive mineral species in the naturally-weathered sediment can be explained by the deposit of a protective layer, composed of sulfide and their oxidation products (sulfate and iron oxides), thus preventing oxygen from diffusing through to the sulfide minerals. Additionally, the presence of aluminosilicates aggregates coating the sulfide minerals could also explain their presence in the naturally-weathered sediment. As organic matter is one of the principal constituents of the sediments (5.8 and 6.3wt% total organic carbon in the unweathered and weathered sediment, respectively), the aggregates are probably partially constituted of refractory humic material. It therefore appears that the natural weathering has led to a significant decrease in PAHs and organotins, but not in PCBs. The evolution of the granulometric structure and the distribution of the metallic contaminants could therefore lead us to consider a treatment by size separation, and a possible valorization of the dredged sediments in civil engineering.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Characterization of how contaminants arise in a dredged marine sediment and analysis of the effect of natural weathering

Couvidat

Chatain

Bouzahzah

et al. 2018

Science of The Total Environment

Self Cite

View full text Add to dashboard Cite

show abstract

“…It is based on adding cementing agents to dredged materials to improve their mechanical behaviour depending on the engineering problems to be solved [5]. In fact, the treated sediments can be recycled as aggregates for road construction [7], cemented mortars [8], fill material and blocks [9] or raw materials in brick production [10]. It follows that also the S/S techniques can be different and vary depending on the targets to be reached by the treated sediments.…”

Section: Introductionmentioning

confidence: 99%

Stabilization and recycling of contaminated marine sediments

2019

View full text Add to dashboard Cite

The paper deals with the treatment and reuse of submarine sediments, i.e. a relevant environmental issue due to the annual huge quantities of dredged sediments (over half contaminated) in Europe. In a vision of sustainability and circular economy, stabilization and solidification (S/S) treatments represent an interesting solution for both environmental protection and reuse of sediments in engineering works. The investigation involved polluted clayey sediments taken up to depths of about 1.5m from the seafloor of the Gulf of Taranto (South of Italy). The research investigates the effects of a treatment with cement and lime enhanced by the addition of green additives, such as active carbon and biochar, for chemical remediation. The last one is a promising and cheap adsorbent material, that is the by-product of - mainly - agricultural waste pyrolysis. The first results suggest that appropriate mix designs and curing times could allow the reuse of sediments by both improving their geotechnical characteristics and making them environmentally acceptable in accordance to end-of-waste criteria.

show abstract

“…Mymrin et al [3] report that in the USA alone, approximately 2.4 million m 3 dredged per year is to be disposed in years between 2011 and 2018, claiming that disposal of large amounts of materials dredged will cause new environmental problems. As reported by Couvidat et al [4] dredged sediments are in most cases disposed, storing materials in landfill sites, which is costly and requires constant monitoring. Dubois et al [1] also argue that dumping sediments from the sea are constrained by national and international regulations.…”

Section: Introductionmentioning

confidence: 99%

An Evaluation of Marine Sediments in Terms of their usability in the Brick Industry: Case Study Port of Koper

Baksa

Cepak

Lukman

et al. 2017

J. sustain. dev. energy water environ. syst.

View full text Add to dashboard Cite

A dredging process is essential for the development of harbours and ports, allowing the functional daily operation of the port. The management of dredged material represents a worldwide challenge, especially considering unwanted deposition of material. Because of their chemical, petrographic, mineralogical and homogeneity composition, marine sediments could represent an appropriate raw material for the brick industry, particularly for the production of clay blocks, roofing and ceramic tiles. In this study dredged material from Port of Koper was tested for such use, thus various analyses were carried out in order to determine if the dredged material is environmentally friendly and suitable for use in the brick industry. These included: chemical analysis, mineralogical analysis, particle size analysis, chloride content analysis and tests of firing in a gradient furnace. Furthermore, tests of mechanical properties, as well as tests of the frost-resistance of the samples were carried out. On the basis of the primary analyses and samples prepared in a laboratory, it was confirmed that marine sediments from the Port of Koper, without any additives are only conditionally suitable as a source material for producing brick products, because without additives they exhibit too much shrinkage on drying and firing, as well as high water absorption, this can be improved by the incorporation of suitable additives, for example, virgin clay or other suitable waste material. The approach described herewith can also be followed to assess sediments from other ports and rivers regarding its potential use in clay brick sector.

show abstract

Feasibility of the reuse of total and processed contaminated marine sediments as fine aggregates in cemented mortars

Cited by 43 publications

References 46 publications

Characterization of how contaminants arise in a dredged marine sediment and analysis of the effect of natural weathering

Characterization of how contaminants arise in a dredged marine sediment and analysis of the effect of natural weathering

Stabilization and recycling of contaminated marine sediments

An Evaluation of Marine Sediments in Terms of their usability in the Brick Industry: Case Study Port of Koper

Contact Info

Product

Resources

About