Physicochemical and index properties of loess stabilized with lime and fly ash piles

Pei, Xiangjun; Zhang, Fanyu; Wu, Wanjiong; Liang, Shouyun

doi:10.1016/j.clay.2015.05.007

Cited by 58 publications

(37 citation statements)

References 33 publications

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“…When hydrated lime is mixed with clay particles, it permanently forms strong cementitious bonds [35][36][37]. Lime has been known to reduce the swelling potential, liquid limit, plasticity index and maximum dry density of the soil, and increases its optimum water content, shrinkage limit and strength [19,38]. It improves the workability and compact ability of subgrade soils [39].…”

Section: Stabilization Using Limementioning

confidence: 99%

Fundamentals of soil stabilization

2017

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Section: Stabilization Using Limementioning

confidence: 99%

Fundamentals of soil stabilization

2017

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“…A second tensile test was conducted for geopolymer with replacement of the NaOH with the base of lime (CaO) that is more "natural" soil material (Group 2, Table 2). The addition of lime is used in applications of soil loess stabilization, e.g., [23]. The lime improves the cation exchange of the soil and absorbs water, which lowers the pH.…”

Section: Resultsmentioning

confidence: 99%

A Clay-Based Geopolymer in Loess Soil Stabilization

Hanegbi

Katra

2020

Applied Sciences

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Soil erosion has environmental and socioeconomic significances. Loess soils cover about 10% of the global land area. Most of these soils are subjected to increased land uses such as unpaved roads, which increase soil destruction and dust emission to the atmosphere. There is a significant interest in applications for dust control and soil stabilization. Application of geopolymers may significantly reduce environmental impacts. This study examines the use of a metakaolin-based geopolymer for dust control and soil stabilization in a semi-arid loess soil. The application of the geopolymer for dust control in comparison with common products (brine, bitumen, polyvinyl acetate-PVA) resulted in no dust emission. As a soil stabilizer, the geopolymer tested in this study provides remarkably good results in the tensile test. The most successful composition of the geopolymer, which is activation solution of sodium silicate and sodium hydroxide (NaOH) together with an addition of 30% metakaolin, obtained soil strength of 23,900 N after 28 days. The attempt to replace NaOH with lime (CaO) in the activation solution was far inferior to the original composition. There is a strong potential to develop natural soil stabilizers from a mineral base that even surpass their capabilities over existing synthetic stabilizers.

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“…Zhen et al [37] studied the thermal conductivities of undisturbed and remolded Malan loess collected from the first terrace of the Yellow River and found that at a saturation degree and a dry density, the thermal conductivity of undisturbed loess was larger than that of remolded loess. To improve strength and deformation behavior of loess, stabilization of loess has been attempted using different materials such as novel reactive magnesia-bearing binders [38], lime and fly ash piles [39], and nanoclay [40]. However, the structural behavior of loess soil under triaxial compression has not been fully investigated because the applicability of the disturbance functions proposed in the literature is site-specific.…”

Section: Introductionmentioning

confidence: 99%

Disturbance Evolution Behavior of Loess Soil under Triaxial Compression

Guo

2020

Advances in Civil Engineering

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This paper presents an investigation into the evolution law of the structural effects of Xi’an loess soil, based on the disturbed state concept. First, a series of consolidated and drained triaxial compression tests were performed on undisturbed and remoulded loess samples prepared at five different moisture contents and tested at four different confining pressures. Second, two disturbance functions with different parameters were proposed to quantify mathematically the structural effects of loess. Finally, the proposed disturbance functions were validated against documented test results by other researchers. The results indicated that the single-parameter disturbance function, with the deformation modulus as its parameter, provides convenience for application but takes no account of the respective contributions of deviatoric stress and mean stress to the disturbance evolution behavior of loess. The double-parameter disturbance function, with the shear and bulk moduli as its parameters, is capable of distinguishing these respective contributions and reflects well the disturbance evolution behavior of loess under various moisture contents and confining pressures. The effects of moisture content and confining pressure on the parameters of the disturbance functions were found to be unsteady. The proposed disturbance functions lay the foundation for establishing a constitutive model for loess accounting for the structural effect.

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Physicochemical and index properties of loess stabilized with lime and fly ash piles

Cited by 58 publications

References 33 publications

Fundamentals of soil stabilization

Fundamentals of soil stabilization

A Clay-Based Geopolymer in Loess Soil Stabilization

Disturbance Evolution Behavior of Loess Soil under Triaxial Compression

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