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Erschienen in: Journal of Material Cycles and Waste Management 3/2022

10.03.2022 | ORIGINAL ARTICLE

Valorization of marine sediments in geopolymer mortars: physico-mechanical, microstructural and environmental investigations at laboratory scale

verfasst von: Afef Zouch, Yannick Mamindy-Pajany, Abdelhadi Bouchikhi, Nor-Edine Abriak, Mohamed Ksibi

Erschienen in: Journal of Material Cycles and Waste Management | Ausgabe 3/2022

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Abstract

The high consumption of natural sand and the accumulation of mineral wastes in landfills such as dredged sediments make it necessary to valorize the wastes as secondary materials in the field of construction. This work dealt with the valorization of sediments from Sidi Mansour (SM) and Sidi Youssef (SY) Tunisian harbors in geopolymer matrices. The experimental design of mixtures (sand with sediment) at 10 to 25% (w/w) of substitutions was based on the optimum packing density. The mortars were assessed for their mechanical, physicochemical, and environmental properties. The results of compressive strength are always higher than the reference mortar with an optimum at 15% of SM and 20% of SY. In addition, the mercury intrusion porosity (MIP) and porosity accessible to water (PAW) is correlated to the compressive strength values. In addition, the environmental quality of mortars was validated. The SEM analysis of mortars confirms the enhancement of adhesion of the matrix due to structurally stable of Sodium Aluminosilicate Hydrate (N–A–S–H) gel. This study revealed that the substitution of sand by sediments can be considered as a suitable option for improving physico-chemical and mechanical properties of the mortars. Also, the geopolymer binder can be effective to stabilize pollutants in the sediments.

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Metadaten
Titel
Valorization of marine sediments in geopolymer mortars: physico-mechanical, microstructural and environmental investigations at laboratory scale
verfasst von
Afef Zouch
Yannick Mamindy-Pajany
Abdelhadi Bouchikhi
Nor-Edine Abriak
Mohamed Ksibi
Publikationsdatum
10.03.2022
Verlag
Springer Japan
Erschienen in
Journal of Material Cycles and Waste Management / Ausgabe 3/2022
Print ISSN: 1438-4957
Elektronische ISSN: 1611-8227
DOI
https://doi.org/10.1007/s10163-022-01382-0

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