Effect of lime and fly ash on swelling percentage and Atterberg limits of sulfate-bearing clay

Cheshomi, Akbar; Es‐haghi, Ali; Hassanpour, Jafar

doi:10.1016/j.clay.2016.09.019

Cited by 42 publications

(14 citation statements)

References 42 publications

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“…Therefore, the addition of FA was very effective in reducing the swell potential of loess, especially with high FA ratio. This result was consistent with that of previous studies with the addition of FA on loess [51,52,55,75] or the addition of FA on clays [70]. However, Ozdemir (2016) suggested that the addition of FA did not change the swell potential at zero days of curing time, and but it significantly decreased the swell potential at seven and 28 days of curing time [46].…”

Section: Effect Of Variation In Fly Ash-stabilized Loess On Swell Potsupporting

confidence: 92%

“…A decrease in plasticity index (22.96%) was observed as FA ratio increased to 30% compared with FA ratio increased at 20% (Table 5). This result agreed with the previous conclusions that the increase in percentage of FA decreased the plasticity index and liquid limit of the treated soils [46,66,[69][70][71][72]. The decrease in plasticity index of specimens might be due to cementitious reactions from the FA fraction, which dissociated CaO and formed cementitious and pozzolanic gels [73] and, thus, produced a cement-stabilizing effect that reduced loess plasticity [74].…”

Section: Effect Of Variation In Fly Ash-stabilized Loess On Atterbergsupporting

confidence: 91%

“…The increment in swell potential might be due to various factors, such as specific gravity mixture, particle size and shape of mixture, and chemical reaction between FA and soil. The rapid hydration process and simultaneous cation exchange reduced the swell potential when FA was added into the soil; in these phenomena, the sodium ions in the soil were replaced by the calcium ions in the FA, the soil flocculated into larger lumps, and new pozzolanic reaction products, such as C-S-H and C-A-H, were produced [51,52,70]. The change in the physical properties of loess-FA mixtures might also be a reason, which was dependent on the non-expansive characteristics and particle size and shape of FA [55].…”

Section: Effect Of Variation In Fly Ash-stabilized Loess On Swell Potmentioning

confidence: 99%

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Influence of Submergence on Stabilization of Loess in Shaanxi Province by Adding Fly Ash

Phoak

Luo

et al. 2018

Applied Sciences

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In this study, the influence of fly ash (FA) content (0%, 10%, 20%, and 30%) on the alteration in the physical and mechanical parameters of loess is investigated. The influences of curing time (0, 14, and 28 days) and submergence and non-submergence conditions are analyzed as well. Analysis considers the variation in Atterberg limits (liquid limit, plastic limit, and plasticity index), compaction parameters (optimum moisture content (OMC), and maximum dry density (MDD)), unconfined compressive strength (UCS) stress, UCS strain, California bearing ratio (CBR) value, and swell potential. Results show that the application of FA-stabilized loess (FASL) is effective. Specifically, the MDD decreases and the OMC increases, the UCS stress increases and the UCS strain decreases, the CBR value improves and the swell potential declines, but Atterberg limits are insignificantly changed by the increase in the FA ratio compared with those of untreated loess. The UCS stress and CBR value are improved with the increase in curing time, whereas the UCS strain is negligible. FASL under submergence condition plays an important role in improving the effect of FA on the UCS stress and CBR value compared with that under non-submergence condition. The UCS stress and CBR value are more increased and more decreased than the UCS strain in submerged samples. Therefore, the application of FASL in flood areas is important for obtaining sustainable construction materials and ensuring environmental protection.

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Section: Effect Of Variation In Fly Ash-stabilized Loess On Swell Potsupporting

confidence: 92%

Section: Effect Of Variation In Fly Ash-stabilized Loess On Atterbergsupporting

confidence: 91%

Section: Effect Of Variation In Fly Ash-stabilized Loess On Swell Potmentioning

confidence: 99%

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Influence of Submergence on Stabilization of Loess in Shaanxi Province by Adding Fly Ash

Phoak

Luo

et al. 2018

Applied Sciences

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“…The calcite in clays was probably present in finer particle sizes, while in the ashes the grains were coarser. As mentioned before, the high CA quantities (above 50 %) significantly lower the quality of bricks in terms of compressive strength [45].…”

Section: Global Sensitivity Analysis -The Relative Importance Of Paramentioning

confidence: 54%

An artificial neural network-based prediction model for utilization of coal ash in production of fired clay bricks: A review

et al. 2021

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This study analyzed the last 20 years` data available on power plant coal ashes used in clay brick production. The statistical analysis has been carried out for a total of 302 cases based on the relevant parameters reported in the literature. The chemical composition of the clays and coal ashes, percentage incorporation and maximum particle size of ash, size of fired samples, peak firing temperature, and the corresponding soaking time were selected as inputs for modeling. The product characteristics i.e. open porosity, water absorption, and compressive strength was taken as output parameters. An artificial neural network model has been developed and showed a satisfactory fit to experimental data and predicted the observed output variables with the overall coefficient of determination (r2) of 0.972 during the training period. Besides, the reduced chi-square, mean bias error, root mean square error, and mean percentage error were utilized to check the correctness of the obtained model, which proved the network generalization capability. The sensitivity analysis of the model suggested that the quantity of Na2O coming from brick clays, the percentages of SiO2 and K2O coming from ashes, and MgO coming from clays were the most influential parameters in descending order for the ash-clay composite bricks` quality, mostly owing to the influence of fluxes during firing.

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“…Chicken eggshells have been the subject of some metal adsorption studies [7][8][9]. The crab meal was bought from the market, finely re-grinded using the model Fritsch Pulverisette 6 and the bentonite was also bought.…”

Section: Amendmentsmentioning

confidence: 99%

Adsorption and Desorption of Lead (Pb) in Sandy Soil Treated by Various Amendments

Kalakodio¹,

Alepu²,

Zewde³

2017

J Environ Anal Toxicol

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Effect of lime and fly ash on swelling percentage and Atterberg limits of sulfate-bearing clay

Cited by 42 publications

References 42 publications

Influence of Submergence on Stabilization of Loess in Shaanxi Province by Adding Fly Ash

Influence of Submergence on Stabilization of Loess in Shaanxi Province by Adding Fly Ash

An artificial neural network-based prediction model for utilization of coal ash in production of fired clay bricks: A review

Adsorption and Desorption of Lead (Pb) in Sandy Soil Treated by Various Amendments

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