The Effect of Cement Kiln Dust on the Collapse Potential of Compacted Shale

Miller, G. A.; Azad, Shahriar; Dhar, Biswajit

doi:10.1520/stp15655s

Cited by 9 publications

(2 citation statements)

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“…This is generally attributed to the substantial disturbance to the soil fabric that occurs during initial swelling of the soaked specimen in the doubleoedometer procedure. In a previous study, collapse potential for a given stress level was generally similar for the single-and doubleoedometer testing on shale; however, swelling potential was different for each method (5). Similar observations of collapse potential were made in the current study.…”

Section: Collapse Testingsupporting

confidence: 86%

Wetting-Induced Settlement of Compacted-Fill Embankments

Miller

Muraleetharan

Lim

2001

Transportation Research Record: Journal of the Transportation R

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Many highway embankments experience problematic settlements. Compression of soil under the self-weight of the embankment generally occurs during construction, but postconstruction, wetting-induced collapse can result in more long-term settlement problems, depending on climate and movement of the wetting front. A study undertaken to examine settlement associated with unsaturated soil embankments included centrifuge modeling of compacted silt embankments, laboratory testing of the embankment soil, and data interpretation with the focus on settlement prediction. A silty soil was selected to facilitate the measurement of matric suction using tensiometers. Three model embankments were constructed and tested in the Army Corps of Engineers Centrifuge Research Center in Vicksburg, Mississippi. Embankments 20 m high were simulated using centrifugal acceleration of 165 g. Embankments were constructed to achieve a relative compaction of 90 or 95 percent based on standard effort and moisture content between 2 and 5 percent dry of the optimum moisture content. Instrumentation used during self-weight compression and wetting included linear variable differential transformers and pore-pressure transducers equipped with high-air-entry porous stones. Results demonstrate the importance of the as-compacted water content and dry unit weight on the potential for wetting-induced collapse settlement. Settlement caused by self-weight compression and that caused by wetting-induced collapse are clearly discernable in results of centrifuge tests, allowing for comparison to settlement predictions. Results are discussed in light of typical compaction specifications, oedometer-based predictions, and implications for the design of compacted embankments.

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Section: Collapse Testingsupporting

confidence: 86%

Wetting-Induced Settlement of Compacted-Fill Embankments

Miller

Muraleetharan

Lim

2001

Transportation Research Record: Journal of the Transportation R

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“…The compression index of the void ratio with pressure curve shows that the compressibility reduced with increasing curing time of the optimum composition of FA-CKD columns. This lower compressibility is caused by an increase in the formation of hydrated gels, which has also been mentioned in previous sections (Miller et al, 1997).…”

Section: Effect Of Fa-ckd Columns On the Compressibility Behaviour Of...supporting

confidence: 67%

Suitability of Fly Ash-Cement Kiln Dust Columns for Stabilizing Expansive (Black Cotton) Soils

Pankaja,

Ranjita,

Ramesh

et al. 2023

AAES

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The paper focuses on the potential use of industrial wastes, which are fly ash (FA) and cement kiln dust (CKD), to stabilise expansive soils like black cotton (BC) soil for construction purposes. Although many soil stabilisation methods exist, the placement of columns consisting of industrial wastes has yet to be tested. Knowing the pozzolanic action and mechanism between the waste product and the soil, this method of placing the industrial waste as a remedy should be trialled. Therefore, this paper proposes and investigates the placement of FA-CKD columns into the soil via a series of laboratory experiments using myriad mixtures and combinations of placement of such columns. The effect of moulding water content and curing time on the BC soil’s consolidation and strength behaviour was also assessed here. Through the experiments, it is found that the optimum mixture of FA-CKD for the columns is at 90%-10%, respectively. This column mixture has been evidenced to improve the unconfined compressive strength of the soil significantly, where its performance improves with curing time. The highest strength improvement can be found at optimum moisture content, followed by wet of optimum and dry of optimum, respectively. By placing the columns in the soil with 4.5D spacing, better consolidation behaviour with a reduced swelling potential of BC soil can be found. Based on the above findings, using FA-CKD columns can improve the BC soil’s engineering behaviour, contributing to waste-to-wealth and sustainable soil stabilisation approaches.

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Cement Kiln Dust

Siddique

Waste Materials and by-Products in Concrete

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The Effect of Cement Kiln Dust on the Collapse Potential of Compacted Shale

Cited by 9 publications

References 0 publications

Wetting-Induced Settlement of Compacted-Fill Embankments

Wetting-Induced Settlement of Compacted-Fill Embankments

Suitability of Fly Ash-Cement Kiln Dust Columns for Stabilizing Expansive (Black Cotton) Soils

Cement Kiln Dust

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