Predicting the mechanical behaviour of a sandy clay stabilised with an alkali-activated binder

Corrêa-Silva, Manuela; Rouainia, Mohamed; Miranda, Tiago F. S.; Cristelo, Nuno

doi:10.1016/j.enggeo.2021.106260

Cited by 13 publications

(2 citation statements)

References 43 publications

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“…However, in recent years, many studies have been performed to investigate ecological solutions to stabilize soils. Alkalineactivated cements are popular eco-friendly binders [2][3][4]; another one is fly ash, both of which have been considered as alternatives to Portland cement in geotechnical applications.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Cement and Fly Ash on the Improvement of Fine Sand Soil

Yazıcı,

Unsever

2024

Applied Sciences

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Soil stabilization problems like liquefaction, bearing capacity, permeability, excessive settlement and swelling can be solved by improving soil’s engineering properties by using various methods. The use of fly ash as a stabilizer has become popular in recent years since it is eco-friendly and effective on soil stabilization, especially for fine-grained soils. This study investigated the reuse of fly ash as a stabilizer (5–25% by weight) and cement (constant 3% by weight) as an activator to enhance the geotechnical properties of poorly graded sand (SP). Standard proctor tests were conducted to determine optimum water content and maximum dry unit weight, followed by direct shear box, falling head permeability and CBR tests at the determined optimum water content. Direct shear box experiments were carried out at two relative densities (30% and 80%) and CBR experiments were performed after 7 and 28 days of curing time. The results demonstrated that the addition of fly ash and cement improved the geotechnical properties, including shear strength, permeability and bearing capacity of the fine sand soil.

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Section: Introductionmentioning

confidence: 99%

Investigation of Cement and Fly Ash on the Improvement of Fine Sand Soil

Yazıcı,

Unsever

2024

Applied Sciences

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“…Furthermore, the effects of the improved lime-based binders were evaluated on different proportions of slag [44], hydrated Portland cement [45,46] and ash [47] in the admixture content for stabilization of clayey soils. The experimental use of the alkali-based materials was reported for improving properties of sandy clay [48]. Finally, various types of cement [49,50], calcined lime/slag blends [51] or cement/slag mixtures [52] were assessed to analyse the behavior of high-moisture content fine-grained soils after stabilization.…”

Section: Introductionmentioning

confidence: 99%

Effects of Water—Binder Ratio on Strength and Seismic Behavior of Stabilized Soil from Kongshavn, Port of Oslo

Lindh,

Lemenkova

2023

Sustainability

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In many civil engineering problems, soil is stabilized by a combination of binders and water. The success of stabilization is evaluated using seismic tests with measured P-wave velocities. Optimization of process, laboratory testing and data modelling are essential to reduce the costs of the industrial projects. This paper reports the optimized workflow of soil stabilization through evaluated effects from the two factors controlling the development of strength: (1) the ratio between water and binder; (2) the proportions of different binders (cement/slag) were changed experimentally in a mixture of samples to evaluate the strength of soil. The experimental results show an optimal combination of 30% cement and 70% slag with a binder content of 120 kg/m3 and a maximum water binder ratio (w/b) of 5. Such proportions of mixture demonstrated effective soil stabilization both on a pilot test scale and on full scale for industrial works. The correlation between the compressive strength and relative deformation of specimens revealed that strength has the highest values for w/b = 5 and the lowest for w/b = 7. In case of high water content in soil and wet samples, the condition of a w/b ≤ 5 will require a higher amount of binder.

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