Material properties of solidified soil grains produced from dredged marine clay

Shinsha, Hiroshi; Kumagai, Toru

doi:10.1016/j.sandf.2018.03.003

Cited by 16 publications

(6 citation statements)

References 7 publications

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“…The dosages of additives are different depending on solidified materials (Saride et al, 2013;Du et al, 2014;Zhang et al, 2014;Anagnostopoulos, 2015;Kogbara et al, 2016;Shinsha and Kumagai, 2018;Wu et al, 2019a;Liu et al, 2019). Considering the manufacturing process background of S/S sediment in the slurry state in a working ship as they were applied in an embankment construction, the dosage of additives is supposed to be large in the present study, since the water content and void ratio are high (Anagnostopoulos, 2015;Wu et al, 2019a).…”

Section: Test Programmentioning

confidence: 93%

Strength and Stiffness Degradation Mechanisms of Stabilized/Solidified Sediments by Freeze–Thaw Cycles

Wang

Jing

et al. 2022

Front. Earth Sci.

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Strength and stiffness of stabilized/solidified (S/S) sediments are supposed to be degraded by freeze–thaw cycles (FTs) when applied in constructions in cold regions. In order to reveal the degradation mechanisms, FTs were first simulated on S/S sediments in the laboratory. Then, macrotests including unconfined compression strength (UCS) tests and direct shear tests were conducted on S/S sediments at different FTs to investigate the strength and stiffness changes and microanalyses including scanning electron microscope analysis (SEM), mercury intrusion porosimetry (MIP), and nitrogen adsorption porosimetry (NAP) to investigate the microstructure changes. Macrotests show that strength indexes decrease gradually, stiffness parameters and brittleness increase first and then decrease, the compaction stage of stress–strain curves diminishes first and then increases, the decrease rate of friction angle decelerates first and then accelerates, and the decrease rate of cohesion decelerates first and then keeps stable, for S/S sediments in FTs. Microanalyses have precisely captured the damage chain of S/S sediments: meso and macropores inside sediment aggregates expand gradually during FTs; as a result, sediment aggregates are fractured and stripped off from the solidification skeleton gradually; losing support of sediment aggregates, solidification skeletons are adjusted first and then collapsed when sediment aggregate fracture reaches a limit value. Based on macro and microfindings, a damage model to explain strength and stiffness degradations by microstructure damage is successfully established. Based on the established damage model, a reasonable idea is proposed for promoting the resistance of S/S sediments to FTs.

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Section: Test Programmentioning

confidence: 93%

Strength and Stiffness Degradation Mechanisms of Stabilized/Solidified Sediments by Freeze–Thaw Cycles

Wang

Jing

et al. 2022

Front. Earth Sci.

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“…According to Huang et al [34], the cohesion ( c ) of cement-solidified soil increased obviously with increasing curing agents, while the friction angle changed slightly and the average was 38°. The internal friction angle (  ) of cement-solidified soil grains ranged from 30° to 45° [35]. According to Zhu et al [36], the effective cohesion of the cement solidified intermediate-plasticity clay ranged from 10 to 110 kPa.…”

Section: Methodsmentioning

confidence: 99%

“…• to 45 •[35]. According to Zhu et al[36], the effective cohesion of the cement solidified intermediate-plasticity clay ranged from 10 to 110 kPa.…”

mentioning

confidence: 99%

Finite Element Analysis on the Behavior of Solidified Soil Embankments on Piled Foundations under Dynamic Traffic Loads

Guo,

Li,

et al. 2024

Applied Sciences

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Most research conducted so far has primarily focused on pile-supported gravel embankments. The ability of solidified soil used as an embankment filling material has been verified, and a clear view on the performance of solidified soil embankments on piled foundations is rather limited. The three-dimensional unit cell models of pile-supported embankments are conducted to investigate the performance of solidified soil embankments in comparison to gravel embankments under static and dynamic loads. Then, a systematic parametric analysis is performed to investigate the effects of various factors, including the cohesion and friction of solidified soil, the velocity and wheel load of vehicles, the pile spacing, the height of embankments. The results show that, compared with the results of gravel embankments, the heights of the outer soil arch plane in solidified soil embankments reduces under static and dynamic loads, and the piles bear more load. In addition, the total settlements of solidified soil embankments decrease with increasing cohesions, and there is an economical cohesion of 25 kPa. The vehicle wheel load, pile spacing, and the height of embankment significantly influence the load transfer mechanism and total settlement of solidified soil embankment, while the friction angles and velocities have little effect on the total settlements and vertical stress. The relationship between the soil arch height and various parameters in solidified soil embankments is established by multiple regression analysis. This investigation highlights the advantage of solidified soil in reducing total settlement and provides an insightful understanding of the load transfer mechanism of solidified soil embankment on piled foundation.

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“…Cement treatment is combined with the development of physical-chemical processes [26]. In detail, hydration reactions produce calcium hydroxide (Ca(OH)2), calcium silicate hydrates(CSH), calcium aluminate hydrates (CAH) and ettringite (Aft), which fill the soil pores and cement soil particles [27]. Cation exchange causes the flocculation and agglomeration of soil particles with the consumption of Ca2+, which fills the pores and further strengthens the aggregate structure [28].…”

Section: Samples and Methodsmentioning

confidence: 99%

Application of Stabilization/Solidification (S/S) Method for Cadmium Pollution in Surface Sediments of the Dongjiaogou River in Kaifeng, China

Shu-ya¹,

Wang²,

Wang³

et al. 2021

E3S Web Conf.

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Cd contamination of sediments poses a serious threat to the global environment human health. A detail and comprehensive investigation of cadmium (Cd) pollution in the surface sediments of Dongjiaogou River was carried out. Concentration analysis of Cd in various depth and locations was conducted based on 82 samples collected from the river surface sediments where the sediments is up to 353 mg/kg. Subsequently, stabilization/solidification (S/S) method, an effective method of improving the engineering properties of sediments and encapsulating contaminants, was applied in these sediments. According to the results, the Cd pollutant was treated effectively by S/S method, which verifies the feasibility to mitigate the hazards caused by Cd in those sediments from the river. Furthermore, the S/S sediments are favorable as filling material in the road for both recycling and construction.

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Material properties of solidified soil grains produced from dredged marine clay

Cited by 16 publications

References 7 publications

Strength and Stiffness Degradation Mechanisms of Stabilized/Solidified Sediments by Freeze–Thaw Cycles

Strength and Stiffness Degradation Mechanisms of Stabilized/Solidified Sediments by Freeze–Thaw Cycles

Finite Element Analysis on the Behavior of Solidified Soil Embankments on Piled Foundations under Dynamic Traffic Loads

Application of Stabilization/Solidification (S/S) Method for Cadmium Pollution in Surface Sediments of the Dongjiaogou River in Kaifeng, China

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