Impact of monotonic and cyclic suction variations on the thermal properties of a stabilized compacted silty soil

Menaceur, Hamza; Cuisinier, Olivier; Masrouri, Farimah; Eslami, Hossein

doi:10.1016/j.trgeo.2021.100515

Cited by 11 publications

(5 citation statements)

References 39 publications

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“…The main reason for this may be that soil Ⅲ has a high water content, which weakens the solidifying effect of the solid-waste-based binder. Simultaneously, the humic acid of the organic matter in soil Ⅲ can also destroy the hydration structure, resulting in lower strength [ 36 , 37 ]. Despite that, the UCS of solidified soils Ⅰ, Ⅱ, and Ⅲ after 28 days can both satisfy the technical requirements for the cement–soil mixing pile (>0.8 MPa, YBJ 225-91 [ 38 ], Chinese standard) when the solidifying agent content is 17% (corresponding to 60 kg/m of the cement–soil mixing pile).…”

Section: Resultsmentioning

confidence: 99%

Study on the Performance and Solidification Mechanism of Multi-Source Solid-Waste-Based Soft Soil Solidification Materials

et al. 2023

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In this paper, ground granulated blast furnace slag, steel slag, red mud, waste ceramic powder, and desulfurization gypsum were used as raw materials to develop a kind of multi-source solid-waste-based soft soil solidification material. Three ratios and the strength activity index were used to determine the fractions of different solid wastes. The mineralogical and microstructural characterization was analyzed by X-ray diffraction (XRD), scanning electron microscope (SEM), and thermogravimetric analysis–differential scanning calorimetry (TG&DSC) tests. The results showed that the unconfined compressive strength of the three types of soft soil increases with an increase in the content of the solidifying agent. The failure strain of the stabilized soil decreases from 1.0–1.3% to 0.75–1.0%, and the failure mode gradually changes from plastic failure to brittle failure. The optimum content of the solidifying agent was determined to be 17% (the lime saturation factor (KH), silica modulus (SM), and alumina modulus (IM) of the solidifying agent were set to 0.68, 1.74, and 1.70, respectively), and the unconfined compressive strength (28 d) of the solidified soil (sandy soil, silty clay, and organic clay) was 3.16 MPa, 2.05 MPa, 1.04 MPa, respectively. Both measurements can satisfy the technical requirements for a cement–soil mixing pile, suggesting the possibility of using various types of solid waste as a substitute for cement.

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Section: Resultsmentioning

confidence: 99%

Study on the Performance and Solidification Mechanism of Multi-Source Solid-Waste-Based Soft Soil Solidification Materials

et al. 2023

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“…Clayey soils exhibit high sensitivity to variations in moisture content but are also subject to adverse impacts of environmental stressors, including climatic conditions, longterm static loading, and dynamic impacts. Therefore, stabilization of such soils, when used as road subgrade, requires remedial treatment to increase their strength properties and decrease permeability [1][2][3][4][5][6][7][8][9][10]. The use of quicklime (QL) for soil stabilization is a widely recognized technique [11].…”

Section: Introductionmentioning

confidence: 99%

Quicklime-stabilized Tuff and Clayey Soils for Highway A3 Construction in Northern Tunisia

Ghazouani

2024

Eng. Technol. Appl. Sci. Res.

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This study presents a comprehensive examination of the effects of quicklime (QL) addition on the stabilization of two distinct clayey soils with high (CH) and low plasticity (CL-tuff). The results showed that incorporating QL into the soils substantially improves their stabilization characteristics. Specifically, the addition of QL results in a notable decrease in the final water content of both soils, as shown by a reduction from 23.04 to 19.06% in CH and from 18.07 to 17.1% in CL-tuff at 4% QL addition. Furthermore, this study reveals a transformation in the plasticity properties of soils. Liquid Limit (LL) and Plasticity Index (PI) were reduced, with CH-tuff exhibiting a significant decrease in PI from 48 to 12 and an increase in Plastic Limit (PL) from 21.8 to 55 at 4% QL. CL-tuff also showed reduced plasticity, with PI decreasing to 8.33 at 4% QL. Additionally, the Immediate Bearing Index (IBI) was improved for both soil samples, indicating improved load-bearing capacities. For CH samples, IBI improved from 6.37 to 11.99 at 4% QL addition, while for CL-tuff, it increased dramatically from 4.5 to 23.6 for the same QL percentage. The findings underscore the effectiveness of QL in improving soil properties crucial for chemical stabilization, providing evidence that QL addition can be a key technique in soil stabilization, especially for soils with high plasticity or those requiring increased bearing strength.

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“…Such a situation can be observed in certain cement treatment applications, such as deep mixing. In other applications, such as the stabilization of compacted soils, the soil remains unsaturated during the curing process and some studies showed that the curing process is associated with an increase in suction in the samples [21,22]. However, very few investigations were performed to analyze the setting reaction development as a function of the curing time under unsaturated conditions, which are more realistic for in situ soil treatment (road subbase, embankments, etc.).…”

Section: Introductionmentioning

confidence: 99%

Statistical and Predictive Analyses of the Strength Development of a Cement-Treated Clayey Soil

2023

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The mechanical efficiency of soil stabilization with cement is mainly controlled by various parameters, namely, the amount of binder, the compaction soil state and the curing conditions. The strength of the treated soil is the result of a complex combination of several factors that condition the physicochemical processes involved in cement hydration, which are difficult to monitor. The objective of this study is to identify the relevant parameters governing the bonding in cement-treated soil and suggest a predictive model for strength evolution using these parameters as input. To this purpose, an extensive testing program is presented to assess the impact of the initial water content (11–18%) and dry density (1.6–1.87 Mg/m3) as well as cement dosage (3 and 6%) in sealed curing conditions for 0, 7, 28 and 90 days. The water content variation, the total suction and the compressive strength were measured after different curing durations. The experimental results are first discussed in the parameters’ space, and then through a principal components analysis to overcome the complexity due to the parameters’ interdependency. The PCA revealed that the cement dosage explained 40% of the dataset variance, the remaining 60% being related to a combination of the initial state and curing time. Finally, a predictive model based on an artificial neural network was developed and tested. The predicted results were excellent, with an R2 of +0.99 with the training data and +0.93 with the testing data. These results should be improved by extending the dataset to include different soils and additional compaction conditions.

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Impact of monotonic and cyclic suction variations on the thermal properties of a stabilized compacted silty soil

Cited by 11 publications

References 39 publications

Study on the Performance and Solidification Mechanism of Multi-Source Solid-Waste-Based Soft Soil Solidification Materials

Study on the Performance and Solidification Mechanism of Multi-Source Solid-Waste-Based Soft Soil Solidification Materials

Quicklime-stabilized Tuff and Clayey Soils for Highway A3 Construction in Northern Tunisia

Statistical and Predictive Analyses of the Strength Development of a Cement-Treated Clayey Soil

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