Requalification of dredging sediments through their use in concrete formulations based on a 3rd generation admixture

Hassoune, Mehdi; Chraibi, Ghita; Fatmaoui, Hassan; Chaoufi, Jamal

doi:10.1016/j.matpr.2019.08.065

Cited by 6 publications

(2 citation statements)

References 3 publications

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“…Against this backdrop, some studies have confirmed that silicate concrete prepared with dredged sediments can improve performance, which fully demonstrates the great potential of dredged sand as building materials. Hassoune et al [2] studied the feasibility of using dredged sand from the port of Agadir in concrete formulations. Their later research showed that the formulation based on dredged sand could be applied to construct a quay wall, which was later proved stable [3].…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Mechanical Properties and Drying Shrinkage Compensation of Solidified Ultra-Fine Dredged Sand Blocks Made with GGBS-Based Geopolymer

et al. 2023

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As natural aggregates become increasingly scarce, attention has turned to ultra-fine dredged sand (UDS) generated in waterway regulation engineering. UDS is typically challenging to utilize due to its high clay content and high water demand. This article uses ground granulated blast-furnace slag (GGBS)-based geopolymer to solidify UDS, along with sodium silicate (SS) and sodium hydroxide (SH) as alkaline activators. This paper explores the effects of SS modulus (SiO2/Na2O molar ratio) and mass percentage content of Na2O on the fluidity, setting time, mechanical properties, and shrinkage behavior of hybrid UDS-GGBS geopolymer (HUGG) paste. According to the research findings, increased SS modulus and Na2O content lead to decreased fluidity and setting time. When the Na2O content reaches 6%, flash coagulation occurs in the slurry, leading to more internal shrinkage cracks and pores. This has been confirmed by scanning electron microscope (SEM) analysis. When Na2O content is 5%, and SS modulus is 1.0, the 90-day maximum compressive strength reaches 56.53 MPa, corresponding to a splitting tensile strength of 6.83 MPa, which can be considered the optimal formulation. Meanwhile, basalt and polypropylene fibers (BF and PPF) are chosen to compensate for the susceptibility to drying shrinkage. Both BF and PPF can significantly inhibit the linear drying shrinkage of the HUGG paste. The BF’s ability to enhance mechanical properties is more robust than PPF’s, which can make the paste more homogeneous. The research contributes an effective method for the resource utilization of UDS.

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Section: Introductionmentioning

confidence: 99%

Experimental Study on Mechanical Properties and Drying Shrinkage Compensation of Solidified Ultra-Fine Dredged Sand Blocks Made with GGBS-Based Geopolymer

et al. 2023

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“…The literature extensively describes the manner of utilization of bottom sediments in building materials. They are used as additives to cements [12][13][14] mortars [3,4,15] as well as concrete [16][17][18][19]. These deposits are also used in ceramic materials, such as bricks [20,21] and lightweight aggregate [22,23].…”

Section: Introductionmentioning

confidence: 99%

Effect of the amount of river sediment on the basic properties of cement mortars

2020

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According to current legal regulations, bottom sediment in watercourses containing heavy metals are considered dangerous to the environment and should be properly managed after extraction. Due to the well-known excellent ability of the products of cement hydration to immobilize heavy metals, the possibility of utilizing this type of waste products in cement composites was preliminary tested. For this purpose, basic research was carried out on the technological and mechanical characteristics of binders containing sediment from one of the rivers located in Lesser Poland. Standard mortars made of Portland cement CEM I and river sediment dried at 105°C were used for the tests. This supplement replaced cement in the amount of 10%, 20%, 30% and 40% by weight. The technological properties such as: water demand, setting time, consistency and mechanical properties were verified. Compressive and tensile strength at bending of hardened mortars were tested at different curing periods, i.e. after 14, 28 and 90 days. The obtained test results confirm that the fraction of river sediment in the binder in the amount of 10% generally does not adversely affect the properties of mortars, however, its greater amount is reflected in changes in the technological features and in a clear reduction of mechanical properties of the tested mortars.

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Assessment of harbor sediment contamination for a path to valorize dredged material

Bortali,

Rabouli,

Yessari

et al. 2023

Arabian Journal of Chemistry

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Requalification of dredging sediments through their use in concrete formulations based on a 3rd generation admixture

Cited by 6 publications

References 3 publications

Experimental Study on Mechanical Properties and Drying Shrinkage Compensation of Solidified Ultra-Fine Dredged Sand Blocks Made with GGBS-Based Geopolymer

Experimental Study on Mechanical Properties and Drying Shrinkage Compensation of Solidified Ultra-Fine Dredged Sand Blocks Made with GGBS-Based Geopolymer

Effect of the amount of river sediment on the basic properties of cement mortars

Assessment of harbor sediment contamination for a path to valorize dredged material

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