Compressibility behaviour of natural and stabilized dredged soils in different organic matter contents

Develioğlu, İnci; Pulat, Hasan Fırat

doi:10.1016/j.conbuildmat.2019.116787

Cited by 27 publications

(4 citation statements)

References 27 publications

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“…Hence, volcanic slag was not recommended to improve the geotechnical properties of DM. Further from economic considerations, fly ash should be used as a stabilizer [79].…”

Section: Stabilized Soil Subgradementioning

confidence: 99%

A Review of Beneficial Use and Management of Dredged Material

Solanki,

Jain,

et al. 2023

Waste

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This study systematically examined dredged materials from various aspects, including their sources, the volume generated annually, beneficial uses, and the management processes currently practiced. In addition, this paper presents the relevant policies governing the dredging, reuse, and disposal of dredged materials in the United States. A summary of various sources, types/classifications, and the physical and chemical properties of dredged materials used by various researchers are presented. This paper also summarizes the innovative techniques for the beneficial reuse of dredged materials in a wide range of applications in concrete materials, construction products, roadway construction, habitat building, landfill liner/cap, agriculture soil reconstruction, and beach nourishment. Further, limitations and corresponding solutions related to the beneficial use and management of dredged materials were provided in the end.

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“…Hence, volcanic slag was not recommended to improve the geotechnical properties of DM. Further from economic considerations, fly ash should be used as a stabilizer [79].…”

Section: Stabilized Soil Subgradementioning

confidence: 99%

A Review of Beneficial Use and Management of Dredged Material

Solanki,

Jain,

et al. 2023

Waste

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“…In recent studies, dredged material was treated with a blend of FA, PC, hydrated lime (HL) and fibers to produce compressed stabilized earth bricks (CSEBs) [20], while a report on the mixture of DM and recycled concrete concluded that mixtures containing 20% DM met the minimum road subgrade properties [21]. The stabilization mechanism and strengthening processes of these traditional stabilizers have been well-characterized in several studies [22][23][24][25], and the relationship between strength and water distribution was investigated using nuclear magnetic resonance spectroscopy [26]. Non-traditional stabilizers including ionic stabilizers, sulphonated limonene and enzyme emulsion are available in concentrated liquid forms, which are diluted with water prior to application and marketed as potential alternatives to traditional calcium-based stabilizers such as lime and cement [27,28].…”

Section: Introductionmentioning

confidence: 99%

Reusing Dredged Material through Stabilization with So-Called Bio-Enzyme Products

Rabbanifar,

Nguyen,

Qian

et al. 2023

Buildings

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Sediments are dredged from waterways to maintain maritime activities and prevent floods. Exorbitant amounts of money are budgeted for the removal of dredged material (DM) and its disposal in landfills. We investigated the potential for reuse of DM as a road construction material using so-called bio-enzyme products as stabilizing agents. To improve the mechanical properties of DM, such as compressive strength, compressibility, Atterberg limits and the California bearing ratio (CBR), mixtures of DM were tested with two different amounts of a commercially available bio-enzyme product, which yielded enzymatically stabilized dredged material (ESDM). Unconfined compressive strength (UCS), compaction and Atterberg limits were measured in accordance with ASTM specifications on all samples. Data show that the addition of bio-enzymes resulted in increases in UCS but did not affect the optimum moisture content (OMC), maximum dry unit weight or Atterberg limits of the DM. A comparative field study was carried out to evaluate the CBR of the CH subgrade before and after treatments with the bio-enzyme product and with lime as a traditional stabilizing agent. The results of the field study supported the laboratory findings. Based on these data and results from the literature, models predicting the effect of bio-enzyme treatments on the value of CBR and of UCS were developed statistically. These models also underlined the importance of the clay fraction and PI values for the improvement of the engineering properties of soil using bio-enzyme additives.

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“…The dredged soils always contain high organic matter content, high limit moisture content, low specific gravity, slow consolidation and drainage, and difficulty in controlling their settlement and deformation. Thus, they are also regarded as problematic soils by the scientific and engineering communities [ 2 ]. Preliminary statistics illustrated that tens of billions of cubic meters of dredged soil were produced worldwide every year [ 3 , 4 , 5 ], among which billions of cubic meters were generated from the major rivers and commercial ports in China in 2021.…”

Section: Introductionmentioning

confidence: 99%

Mechanical Properties and Strengthening Mechanism of Dredged Silty Clay Stabilized by Cement and Steel Slag

et al. 2022

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The high moisture content and low strength of dredged soft soils result in significant difficulties in directly reutilizing them in engineering. Improving their mechanical properties effectively and achieving re-utilization with the maximum benefit in engineering is the key to disposing of dredged soils with high moisture content. This study investigated the influences of cement and steel slag ratio, moisture content, the maximum particle size of steel slag, and curing age on the compressive strength of dredged silty clay in a plastic flow state. The performance improvement of dredged silty clay stabilized with cement and steel slag was discussed by comparing to related previous studies. The strengthening mechanism of dredged soils stabilized with cement and steel slag was explored by microstructural observation. The results show that when the ratio of cement to steel slag was 9:6; namely, using steel slag to replace 40% of cement, the strength properties of dredged silty clay stabilized by cement and steel slag could ensure the minimum requirements of the project greater then 100 kPa, and their economics could achieve the best results. The finer the particle size of steel slag was, the better the stabilization effect was. The compressive strength of dredged silty clay stabilized by cement and steel slag with particle sizes of less than 0.075 mm was 1.06 times, 1.10 times, and 1.16 times that of 0.25 mm, 1 mm, and 2 mm and increased linearly over curing ages earlier than 28 days. The compressive strength of dredged silty clay stabilized by cement and steel slag cured for 28 days was 2.44 times, 1.59 times, and 1.36 times that of 3, 7, and 14 days, respectively. The evolution of microstructural characteristics showed that the internal pore sizes of dredged soil decreased the structural compactness increased significantly due to the formation of more calcium silicate hydrate and other agglomerated flocculent gel materials from the further reaction between steel slag and cement hydration products. The results of this study can provide technological parameters for the re-utilization of dredged soil stabilized with cement and steel slag.

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Compressibility behaviour of natural and stabilized dredged soils in different organic matter contents

Cited by 27 publications

References 27 publications

A Review of Beneficial Use and Management of Dredged Material

A Review of Beneficial Use and Management of Dredged Material

Reusing Dredged Material through Stabilization with So-Called Bio-Enzyme Products

Mechanical Properties and Strengthening Mechanism of Dredged Silty Clay Stabilized by Cement and Steel Slag

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