Effectiveness of fresh cement kiln dust as a soil stabilizer and stabilization mechanism of high swelling clays

Ogila, Waleed Abdelmoghny Metwaly

doi:10.1007/s12665-021-09589-4

Cited by 28 publications

(11 citation statements)

References 48 publications

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“…This observation (i.e. that there are no preferential orientations of the structure of treated clay) has also been reported elsewhere (Abdallah et al 2023 ; Ogila 2021 ). Therefore, our study concluded that the flocculation and agglomeration between the soil particles contributed to the increase in the mechanical strength of the clay soil although it remains unclear why this was not also the case for the bioaugmentation treatment (Fig.…”

Section: Resultssupporting

confidence: 89%

An electrokinetic-biocementation study for clay stabilisation using carbonic anhydrase-producing bacteria

Mwandira,

Mavroulidou,

Satheesh

et al. 2023

Environ Sci Pollut Res

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This study investigates the feasibility of biocementing clay soil underneath a railway embankment of the UK rail network via carbonic anhydrase (CA) biocementation, implementing the treatments electrokinetically. Compared to previous biocementation studies using the ureolytic route, the CA pathway is attractive as CA-producing bacteria can sequester CO2 to produce biocement. Clay soil samples were treated electrokinetically using biostimulation and bioaugmentation conditions to induce biocementation. The effects of the treatment were assessed in terms of undrained shear strength using the cone penetration test, moisture content, and calcium carbonate content measurements. Scanning electron microscopy (SEM) analyses were also conducted on soil samples before and after treatment to evaluate the reaction products. The results showed that upon biostimulation, the undrained shear strength of the soil increased uniformly throughout the soil, from 17.6 kPa (in the natural untreated state) to 106.6 kPa. SEM micrographs also showed a clear change in the soil structure upon biostimulation. Unlike biostimulation, bioaugmentation did not have the same performance, although a high amount of CaCO3 precipitates was detected, and bacteria were observed to have entered the soil. The prospects are exciting, as it was shown that it is possible to achieve a considerable strength increase by the biostimulation of native bacteria capturing CO2 while improving the soil strength, thus having the potential to contribute both to the resilience of existing railway infrastructure and to climate change mitigation.

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Section: Resultssupporting

confidence: 89%

An electrokinetic-biocementation study for clay stabilisation using carbonic anhydrase-producing bacteria

Mwandira,

Mavroulidou,

Satheesh

et al. 2023

Environ Sci Pollut Res

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“…3 shows the the graph for Researcher versus Unconfined Compressive Strength (kN/m 2 ) Most of the soil-lime mixture and the soil-fly ash mixture consistency was very stiff where the qu data was from 200 kN/m 2 to 400 kN/m 2 compared to the soil-cement mixture that has more than 400 kN/m 2 that the consistency was at hard. For the medium consistency, the result being improved to the hard consistency when the soil was added with the cement, which is the result get from [16], [30], and [31]. For the stiff consistency, the resulting increase when the soil was added with the fly ash and changed the consistency too hard where the result gets from.…”

Section: 1 Basic Datamentioning

confidence: 99%

Review on Soil Improvement by Using Various Chemical Additives for Foundation

Khalid

Siang

2021

J-SUE

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This work aimed to study the most effective chemical additives to increase the strength of the clay soil. The problem statement is to improve the soil strength to avoid failure in the ground. The chemical additives that be used are lime, cement, and fly ash. These chemical additives were commonly used to stabilize the soil and make the shear strength of the soil increase. The data taken was from the previous research, where the data was compared to get the most effective chemical additives to improve the soil stability and soil strength. The percentage of the chemical additive used in the soil mixture was 8% to 10%. The data from previous research was chosen based on the rate used of the chemical additive and the research was taken from Science Directed website only. Data were collected through 30 previous studies using clay and chemical additives such as cement, lime, and fly ash. The data for Plastic Limit, Liquid Limit, Plasticity Index, Optimum Moisture Content, Maximum Dry Density, and Unconfined Compressive Strength was taken by referring to the previous study. Then the data was listed in Microsoft Excel to generate the graph for comparison. All the data obtained are then compared to get which chemicals can increase the strength of the soil. The result of this study shows that the cement was the most effective chemical additive to improve the soil strength and to stabilize the soil than the lime and fly ash.

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“…Likewise, CKD was economically utilized in the brick and ceramic industry as a cementitious agent with many percentages (2-50%), including the following: Aydin et al (2019) in the production of ceramic wall tiles [38], Ewais et al (2015) to produce wollastonite ceramics [39], Mahrous and Yang (2011) for cement bricks production [40], Ogila (2014) in the manufacturing of red clay bricks [41], El-Attar et al (2017) to produce bricks [42], Abdel-Gawwad et al (2021) in unfired building brick production [43], and Abdulkareem and Eyada (2018) to manufacture pressed building bricks [44].…”

Section: Introductionmentioning

confidence: 99%

Eco-Sustainable Recycling of Cement Kiln Dust (CKD) and Copper Tailings (CT) in the Cemented Paste Backfill

2023

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Cement global demand shows continued growth and a significant increase in the production volume, which may negatively impact the non-renewable natural resources and the environment, which is incompatible with sustainability goals. Cement kiln dust (CKD) is a primary concern associated with clinker manufacturing as a waste byproduct. Similarly, the mining industry produces copper tailing as unwanted material while beneficiating the ore, creating environmental problems due to difficulty in managing worldwide generated quantities that reach billions of metric tons. This study investigated the beneficial utilization of cement kiln dust and copper tailing as undesirable wastes in industrial applications through underground mines’ cemented paste backfill (CPB). Sixty different mixtures were prepared with three types of CKD collected from various cement manufacturers and were accordingly used with a proportion of 5, 10, and 15% to partially replace ordinary Portland cement (OPC) and pozzolan Portland cement (PPC) binders, represented in hundreds of CPB samples. The hardened specimens were subjected to density, uniaxial compressive strength (UCS), and axial deformation measurements to evaluate the physical and mechanical properties at curing up to 90 days. Meanwhile, X-ray powder diffraction (XRD) was extensively applied to chemically investigate the hydration products of CPB-hardened mixtures. Moreover, we developed a UCS predictive model applying two techniques: multiple variables regression analysis and artificial neural network (ANN). The results showed that the tricalcium silicate (Alite) and dicalcium silicate (Belite) phases form C-S-H upon hydrations and provide high strength in the binary mixtures. Meanwhile, the CKD’s lime saturation factor (LSF) governed the strength value in the ternary mixtures that utilized copper tailings. That makes CKD practical in the CPB mixture when partially replacing the OPC and PPC binders, with a proportion of up to 15%. In addition, the ANN technique’s predictive model exhibited a significant positive correlation with excellent statistical parameters that achieved 0.995, 0.065, and 0.911 for R2, RMSE, and MAE, respectively.

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Effectiveness of fresh cement kiln dust as a soil stabilizer and stabilization mechanism of high swelling clays

Cited by 28 publications

References 48 publications

An electrokinetic-biocementation study for clay stabilisation using carbonic anhydrase-producing bacteria

An electrokinetic-biocementation study for clay stabilisation using carbonic anhydrase-producing bacteria

Review on Soil Improvement by Using Various Chemical Additives for Foundation

Eco-Sustainable Recycling of Cement Kiln Dust (CKD) and Copper Tailings (CT) in the Cemented Paste Backfill

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