Safety factor calculation of a road structure with cement-modified loess as subgrade

Lenoir, Thomas; Dubreucq, Thierry; Lambert, Thibaut; Killinger, Denis

doi:10.1016/j.trgeo.2021.100604

Cited by 11 publications

(6 citation statements)

References 54 publications

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“…For instance, at 28-day curing, the UCS increased from 200.8 kPa to 447.6 kPa, 1549.3 kPa, 2325.7 kPa and 3343.1 kPa for 0%, 3%, 6%, 9% and 12% cement, respectively. The rigid behaviour of a high dosage of cement stabilised soil is a common trend since they often behave in a condition between soil and rock [66]. The failure behaviour of stabilised soil in this paper agrees with that observed in [45,67].…”

Section: Unconfined Compressive Strength (Ucs) and Durabilitysupporting

confidence: 87%

Evaluation of cement stabilised residual soil on macro- and micro-scale for road construction

et al. 2022

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Lateritic soil is a kind of residual soil widespread in tropical countries. This soil usually possesses acceptable engineering properties to be laid under the construction projects. However, it needs treatment for transportation infrastructure such as railway and road subgrade and embankment, particularly when it is in fine-grained form. Thus, cement, one of the very common stabiliser agents in soil stabilisation, was selected to study its influence on lateritic soil at macro- and micro-levels. In order to achieve this goal, UCS, durability, FESEM and EDX tests were conducted. The results obtained indicate that the UCS increase occurs with an increase in cement content and curing time. It was also found that the shear modulus increases with cement content and curing time. The durability test results disclosed that 3% cement is not enough for soil stabilisation when used for projects in the areas subjected to cyclic wetting-drying cycles. The durability test results revealed that the UCS decreased for specimens treated with 6% cement, while on the other hand, the UCS increased for samples treated with 9% and 12% cement. The FESEM results revealed that the soil micro-structure changed with the addition of cement and curing time. The EDX results presented the chemical elements change upon adding cement and increasing curing time. Overall, it was found that cement-stabilised residual soil can be used for road construction. However, the cement percentage needed to stabilise residual soil differs depending on the standards.

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Section: Unconfined Compressive Strength (Ucs) and Durabilitysupporting

confidence: 87%

Evaluation of cement stabilised residual soil on macro- and micro-scale for road construction

et al. 2022

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“…For instance, the values for ITS on CSSs have been reported between 0.050 and 0.300 MPa for gravel and limestone [21], 0.050 and 0.550 MPa for silt [14], 0.010 and 0.370 MPa for sand [25] when CC varied from 4 to 8% (7 < CT < 21 days), 3% to 9% (7 < CT < 28 days) and 1 to 12% (CT = 7 days), respectively. For cement-modified loess, when treated with three different hydraulic binders (CC = 5.5% and 7.0%) ITS varied between 0.330 MPa and 0.530 MPa for CT = 90 days [13]. For cemented sands [64], ITS ranged between 0.020 and 0.130 MPa (42 < CT < 90 days) when 2 < CC < 6%.…”

Section: Resultsmentioning

confidence: 96%

“…These treated materials are called Cement-Stabilized Soils (CSS). They constitute an intermediate class of geomaterials whose mechanical behavior is at the boundary between classical soil mechanics and rock mechanics [12,13]. Cement stabilization is widely used in civil engineering applications such as embankments, slope protection of dams, pavement of highways, building pads and foundation stabilization [5,14].…”

Section: Introductionmentioning

confidence: 99%

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Data-Driven Prediction of Cement-Stabilized Soils Tensile Properties

Castaneda-Lopez,

Lenoir,

Sanfratello

et al. 2023

Infrastructures

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The indirect tensile strength of two geomaterials treated with variable cement contents, degrees of compaction and water contents were tested after several curing times. A statistical review through an analysis of variance allows for identifying the significant variables and generating prediction models. The distribution of associated uncertainties was measured. Based on these probabilistic results, numerical models were constructed using Latin Hypercube Sampling as the space filling technique. Predictions from the numerical sampling were in accordance with the experimental results. The numerical results suggest that the net gain in accuracy was not affected by the soil type. In addition, it increases rapidly as a function of the sampling size. The proposed approach is broad. It can help to highlight the physical mechanisms involved in behaviors of multi-component materials.

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“…The loess is considered as a problematic soil because of its susceptibility to collapse under wetting. In order to improve the geotechnical behaviour of loess, the soil stabilization with hydraulic binders has been widely applied (Sariosseiri, Muhunthan, 2008;Antonov, 2013;Evstatiev, Karastanev, 2013;Bahmyari et al, 2021;Lenoir et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

Effect of natural zeolite on the shear strength of cement stabilized loess soil

Tchakalova¹

2022

Rev. Bulg. Geol. Soc.

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The present study intends to make an initial assessment of the effect of a natural zeolite addition on shear strength of cement stabilized loess soil. Unconsolidated undrained triaxial compression shear tests were performed for zeolite & cement-treated and cement-treated samples. It is found that the addition of natural zeolite does not reduce the shear strength of the cement stabilized loess. It causes only slight changes in shear strength parameters of non-compacted loess-cement. This allows the natural zeolite to be successfully used for an improvement of the durability, impermeability, sorption and retardation characteristics of the loess-cement.

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Safety factor calculation of a road structure with cement-modified loess as subgrade

Cited by 11 publications

References 54 publications

Evaluation of cement stabilised residual soil on macro- and micro-scale for road construction

Evaluation of cement stabilised residual soil on macro- and micro-scale for road construction

Data-Driven Prediction of Cement-Stabilized Soils Tensile Properties

Effect of natural zeolite on the shear strength of cement stabilized loess soil

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