Assessment of Cement Kiln Dust-Treated Expansive Soil for the Construction of Flexible Pavements

Salahudeen, AB; Eberemu, Adrian O.; Osinubi, Kolawole J.

doi:10.1007/s10706-014-9769-0

Cited by 85 publications

(29 citation statements)

References 2 publications

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“…This is predicted to be because of the self-hardening of the mixture between the fly ash and sand particles. Previous research conducted by Gay [21][22][23][24][25][26][27][30][31][32]47,48]. In more detail, Jalali et al (1997) confirmed that the delayed improvement in the strength of stabilized soil was strongly dependent on the curing temperature [32].…”

Section: The Effect Of Curing Timesupporting

confidence: 62%

“…The delay in the strength improvement at the initial stage is the natural behavior of FA as a binder. Sufficient time is needed for completion of the pozzolanic reaction in establishing cementitious and pozzolanic gel [21][22][23][24][25][26][27][30][31][32]38,47,48].…”

Section: The Effect Of Curing Timementioning

confidence: 99%

“…These chemical reactions dissociate the lime (CaO) in the fly ash and establish cementitious and pozzolanic gels consisting of calcium silicate hydrate (CSH) gel and calcium aluminate hydrate (CAH) gel, as described in Equations (1) to (4). Consequently, the fly ash will bind to soil particles and increase the strength and stiffness of that soil [21][22][23][24][25][26][27].…”

Section: Introductionmentioning

confidence: 99%

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The Mechanical Properties of Fly-Ash-Stabilized Sands

et al. 2020

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The stabilization of soil through the addition of fly ash has been shown to be an effective alternative for improving the strength and stiffness of soil through the resulting chemical reactions. The chemical reaction that occurs dissociates the lime (CaO) in the fly ash, and the establishment of cementitious and pozzolanic gels (consisting of calcium silicate hydrate (CSH) gel and calcium aluminate hydrate (CAH) gel) binds the soil particles and increases the strength and stiffness of the soil. Investigations into the mechanical properties of sands stabilized with fly ash (fly-ash-stabilized sands) were conducted through a series of unconfined compressive strength (UCS) and direct shear strength tests for various fly ash percentages, curing times, grain sizes, degrees of saturation during sample preparation, and content of fines. It was found that the mechanical properties—UCS and direct shear strength (DSS)—of fly-ash-stabilized sands increased with both increasing fly ash content in the specimen and curing time, but decreased with increasing grain size, degree of saturation during sample preparation, and content of fines. The results indicated that fly-ash-stabilized sands required more than a month to attain their optimum performance with regard to binding sand particles.

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Section: The Effect Of Curing Timesupporting

confidence: 62%

Section: The Effect Of Curing Timementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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The Mechanical Properties of Fly-Ash-Stabilized Sands

et al. 2020

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“…Time-strength development is crucial in the study of strength characteristics of soils treated with stabilizers as the structure of such materials evolves with time due to continuing hydration/ pozzolanic reactions ( [7], [8], [9], [10]). To illustrate the strength evolution soil specimens treated with 2%, 4%, 6%, 8% and 10% cement, the stress-strain response was recorded for each of the mixtures which were cured for 0, 7, 14 and 28 days to produce the stress-strain curves.…”

Section: Strength Characteristics Of Soil-cement Stabilizationmentioning

confidence: 99%

Determination of Optimum Cement Content for Stabilization of Soft Soil and Durability Analysis of Soil Stabilized with Cement

Ashraf¹

2018

AJCE

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This research was aimed at finding the optimum cement content for achieving maximum compressive strength and stabilization in soft soil found in the periphery of the city of Chittagong. But, gaining strength was not considered enough unless it can be proved that strength was gained without compromising the durability. As such, durability test was performed on the samples stabilized with different percentages of cement. In this research three different soil samples were used. The samples were collected from three different areas within the city where future expansion of the city is expected. Six different percentages of cement by weight of soil: 0%, 2%, 4%, 6%, 8%, and 10% were used. Cement was mixed with soil at optimum moisture content. Cubes were casted and their compressive strengths assessed after a curing period of 7, 14 & 28 days. The durability test was done in two different cycles: 2 days wetting-drying and 7 days wetting-drying within a time frame of 28 days. The volume and weight were monitored after completion of each cycle of wetting and drying. The performance of the soils modified with different percentages of cement were assessed using Standard Proctor Test, Unconfined Compression Test and Durability Test. It was found that compressive strengths in the samples under test increased with the increase of cement content up to 8%. But when cement content is increased above 8%, the compressive strength increased but in a slower rate. At the end of durability test, it was observed that volume, and weight of the soil samples produced with 2, 4 and 6% cement changes with the variation in wetting and drying periods. But when the cement percentage is increased by 6%, preferably increased to 8%, no appreciable change in weight and volume were observed after the wetting and drying cycles. The samples going through the two days wetting and drying cycles under durability test showed greater unconfined compressive strength compared to samples going through seven days durability cycle of wetting and drying. It may be mentioned here that the three soil samples stabilized with cement did not show any major degradation in compressive strength during durability test.

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“…The common problem of the swelling soil is the volume changes due to the variation of moisture and then the resulting damage of foundations and pavements movements due to this property [1][2]. Expansive soils are a major engineering problem and their identification and mapping is an important undertaking in the building industry [3].…”

Section: Introductionmentioning

confidence: 99%

Improving Expansive Soil Properties by Adding Fuel Oil

Zeini¹,

Al-Abdaly²

2020

ARFMTS

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Expansive soils are the an un constant volume soil, because, they distend or swell when wetting & shrink when they are dried, therefore they affect the stability of the structures that are rested on it, such as light weight buildings & pavements and, then, damages appear because of the developments of heave and swelling which depend, mainly, on the clay content (less than 0.002mm particles size) which the soil has. The problem discussed her on an expansive soil area at the Iraqi west desert that the new [Wild Hajj] road passes over it, named AL-Bussita area. Stability tests such as maximum dry density, CBR, unconfined and triaxial shear test besides other tests such as swelling tests, (one dimensional oedometer tests), were performed on soil shales taken from this area. The study was continued with a sample from a same soil mixed with the fuel oil. The simulation and experimental results demonstrate that the (8% by weight) was the optimum percent of the fuel oil to minimize the swelling potential, and to get a good engineering soil property and the mixed soil became acceptable to use in earth works of roads.

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Assessment of Cement Kiln Dust-Treated Expansive Soil for the Construction of Flexible Pavements

Cited by 85 publications

References 2 publications

The Mechanical Properties of Fly-Ash-Stabilized Sands

The Mechanical Properties of Fly-Ash-Stabilized Sands

Determination of Optimum Cement Content for Stabilization of Soft Soil and Durability Analysis of Soil Stabilized with Cement

Improving Expansive Soil Properties by Adding Fuel Oil

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