Investigation on shear strength of stabilised clay using cement, sodium silicate and slag

Vakili, Mohammad Vali; Chegenizadeh, Amin; Nikraz, Hamid; Keramatikerman, Mahdi

doi:10.1016/j.clay.2016.02.019

Cited by 33 publications

(5 citation statements)

References 21 publications

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“…the differences increase with more stabilizer (gypsum plaster). Vakili et al (2016) performed direct shear tests drained in kaolinitic clay (c' = 12.5 kPa and f' = 19.9°) and mixtures of sodium silicate, ground granulated blast fur-nace slag (composed of gypsum and bassanite) and cement. In these mixtures, the cement content was maintained constant (2%), the sodium silicate contents were 1%, 1.5% and 2.5%, and the slag contents were 3%, 4% and 5%; the curing times were 7, 14 and 28 days.…”

Section: Shear Strengthmentioning

confidence: 99%

Effects of the Addition of Dihydrate Phosphogypsum on the Characterization and Mechanical Behavior of Lateritic Clay

Mascarenha¹,

Neto²,

Matos³

et al. 2018

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This paper presents the effect of adding dihydrate phosphogypsum, which is a byproduct of the production of phosphate fertilizers, on the mechanical behaviour of a lateritic clay typical of Brazil's Midwest region. Because of the distinction of the mechanical behaviours of both materials, laboratory experiments were conducted with soil, phosphogypsum and mixtures with 10%, 20% and 50% phosphogypsum content. One-dimensional consolidation, direct shear and scanning electron microscopy (SEM) tests were conducted on optimally compacted specimens to show the effect of the loading time on the mechanical parameters of the materials. Water percolated through the materials was chemically analysed to verify the groundwater level contamination potential due to cation lixiviation in phosphogypsum. The results show that the addition of phosphogypsum to the soil increases the compressibility without significant effect on the strength parameters, and the broken phosphogypsum particles make the mixture deformability depend on the loading time. With this study, one can conclude that the dihydrate phosphogypsum content in geotechnical works must be maintained below 20%, since higher ratios negatively affect the soil mechanical behaviour and ground water contamination potential. This study also presents an option to reuse and dispose of the most commonly produced phosphogypsum type in Brazil.

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Section: Shear Strengthmentioning

confidence: 99%

Effects of the Addition of Dihydrate Phosphogypsum on the Characterization and Mechanical Behavior of Lateritic Clay

Mascarenha¹,

Neto²,

Matos³

et al. 2018

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“…In combined post-grouting, pile-side grouting first can effectively increase the pressure during pile-tip grouting, which is helpful to form an enlarged solid at the pile tip [11]. Many engineering practices have identified post-grouting as an exceptionally successful approach for improving the engineering performance of bored piles [12][13][14][15]. This can increase the loading capacity of the pile tip, improve the frictional resistance of the pile side, and reduce uneven settlement.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on the Shear Properties of Soil around Piles with Permeation Grouting

et al. 2023

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While post-grouting is frequently reported to improve the engineering performance of piles, the shear strength of the soil around piles is not well understood. To investigate the strengthening mechanism of soil around piles with permeation grouting, laboratory tests were carried out on homemade cement soil from the aspects of shear strength and microstructure characteristics. The evolution rule of the shear stress–shear displacement curve of grouting soil with different cement contents was analyzed, and the influence of grouting parameters on shear strength was explained. A composite exponential model describing the shear stress and shear displacement of permeation grouting silty clay was established. Furthermore, the influence of different cement content on changes in the microstructural characteristic parameters of the soil around piles was studied. The results show that penetration grouting has a positive effect on improving the shear strength of the soil around piles, and the failure mode of silty clay changed from elastic–plastic failure to brittle failure after grouting. Permeation grouting makes the particle structure denser, which limits the changes in pore arrangement and distribution. The shear failure of the soil around piles under permeation grouting obeys the Mohr–Coulomb criterion of failure. It is recommended to increase the grout diffusion radius during construction, considering the reinforcement effect of permeation grouting on the soil around piles.

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“…(Yadav & Tiwari, 2017). Some researchers also use more than 2 pozzolanic cement mixed in clay stabilization such as Vakili mixing with sodium silicate and slag (Vakili et al, 2016), Putra (Putra & Zaika, 2016) mixing rice husk ash and sugarcane.…”

Section: Introductionmentioning

confidence: 99%

Effect of Adding Wood Powder Ash on CBR Value in Stabilized High Plasticity Clay Cement and Lime

2021

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<p>Cement and lime are widely used as stabilizing agents for soft clays. Some pozzolanic materials have also been used as additives such as asphalt, geosta, fly ash (geopolymer), base ash, salt. Industrial waste such as rice husk ash, coal burning ash (geopolymer) is also used as an alternative for stabilization materials. This research aims to study the effect of sawdust ash, as wood waste, to replace cement and lime on the stabilization of high plasticity clay. The effectiveness of sawdust ash, in this study, was evaluated from the CBR value. The test samples were also reviewed under conditions with and without immersion and with and without curing. Based on the test results, lime is very effective as an additive because it increases the CBR value of more than 100 at a level of 10%. Wood husk ash also increases the CBR value by 100%. The use of cement, lime and wood husk ash requires curing time so that there is a strong bond between the clay and additives. The use of additives without curing did not increase the CBR value. In the stabilization of clay with 10% lime, replacement of lime with wood husk ash by 4%-6%, can be used as a road sub-grade with good quality.</p>

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Investigation on shear strength of stabilised clay using cement, sodium silicate and slag

Cited by 33 publications

References 21 publications

Effects of the Addition of Dihydrate Phosphogypsum on the Characterization and Mechanical Behavior of Lateritic Clay

Effects of the Addition of Dihydrate Phosphogypsum on the Characterization and Mechanical Behavior of Lateritic Clay

Experimental Study on the Shear Properties of Soil around Piles with Permeation Grouting

Effect of Adding Wood Powder Ash on CBR Value in Stabilized High Plasticity Clay Cement and Lime

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