Enhancing durability of quarry fines modified black cotton soil subgrade with cement kiln dust stabilization

Amadi, Agapitus Ahamefule

doi:10.1016/j.trgeo.2014.02.002

Cited by 62 publications

(23 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: 63%

“…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: 63%

Section: Introductionmentioning

confidence: 99%

The Mechanical Properties of Fly-Ash-Stabilized Sands

et al. 2020

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“…It is well known that road subgrade soil stabilisation has a major influence on pavement construction and durability (for example: Yoder and Witczak 1975, Puppala et al 1996, Edil et al 2006, Trivedi et al 2013, Amadi 2014. While the most common stabilisation binder is cement, a polymer-based binder can be a viable choice, as several authors have shown (for example: Barvenik 1994, Levy and Ben-Hur 1997, Orts et al 2007, Marin et al 2010, Baghini et al 2014.…”

Section: Introductionmentioning

confidence: 99%

Polyampholyte polymer as a stabiliser for subgrade soil

Rodriguez

Chandramohan

Iyengar

et al. 2016

International Journal of Pavement Engineering

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a texas a&m university at Qatar, education City, Doha, Qatar; b Zachry Department of Civil engineering, texas a&m university, College Station, tX, uSa; c research School of Physics and engineering, the australian national university, Canberra, australia ABSTRACT This study evaluates the potential of selected ionic polymers to act as pavement subgrade binders. Investigations were based on their relative performance with a Qatari soil which was selected as typical of a pavement subgrade to be found in the Middle East and North African region. The polymeric binders chosen were three synthetic ionic variations of polyacrylamide: cationic poly(acrylamidopropyl trimethyl ammonium chloride) (designated PAMTAC), anionic hydrolysed poly(acrylamide) (HPAM) and the ampholitic terpolymer poly(acrylamide-co-sodiumacrylate-co-(3-acrylamidopropyl) trimethylammonium chloride) (TPAM). The polymers were characterised by Fourier transform infrared spectroscopy (FT-IR) and nuclear magnetic spectroscopy ( 1 H-NMR and 13 C-NMR). The comparative performance of the polymertreated soil was judged on the basis of results obtained from selected standard mechanical test data: specifically, the unconfined compressed strength, the stiffness modulus and the toughness. It is concluded that a 50% w/w aqueous solution of the ampholitic terpolymer applied at a dosage of 2.0% by dry weight of the soil gives the best subgrade stabilisation. Of some significance, it is further noted that this ampholitic polymer was superior as a binding agent to the traditional standard, Portland cement, judged under equivalent but nonstandard conditions. Modifying the polymer to act as a binder for subgrade soils in general is also discussed.

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“…The stabilizing agents are mixed with the natural soil to improve soil strength as these stabilizing agents provide the benefits of bonding the particles of soil, removing excess water from the pores of soil, and filling the empty voids in the soil. The improvement rate depends on the mineral composition of the soil, type and the number of exchangeable cations, and the curing time [21][22][23][24][25][26][27][28][29][30][31][32][33].…”

Section: Soil Improvementmentioning

confidence: 99%

Improvement of Geotechnical Properties of Cohesive Soil Using Crushed Concrete

Karkush

Yassin

2019

Civ Eng J

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Some natural resources such as gravel are not renewable, therefore, it is necessary to reduce the use of such resources and replace them with other recycled, economic, and environmentally friendly materials. Recycled crushed concrete aggregates demolished from old buildings and blocks of waste concrete can be used to replace the natural aggregates. The present study focused on using recycled crushed concrete in improvement the chemical and geotechnical properties of soft soil having undrained shear strength of 6.78 kPa. The soft soil samples were mixed with 5, 10, and 15% of crushed concrete. The blocks of waste concrete are grinded by mills to get crushed concrete which passing sieve no. 4. Such aggregates are lighter than natural aggregates and provide a good deformation modulus when mixed with soil. In Iraq, there are hundred thousand tons of concrete blocks used as fences and now considered wastes after removing these security fences, so it’s important to interest from recycling of such materials to be used in the improvement wide region of soft soils in Iraq. The results of tests showed increasing the undrained shear strength of soft soil by 175-193.5% and reduced the compressibility of soft by 25-31% measured in terms of compression index.

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Enhancing durability of quarry fines modified black cotton soil subgrade with cement kiln dust stabilization

Cited by 62 publications

References 2 publications

The Mechanical Properties of Fly-Ash-Stabilized Sands

The Mechanical Properties of Fly-Ash-Stabilized Sands

Polyampholyte polymer as a stabiliser for subgrade soil

Improvement of Geotechnical Properties of Cohesive Soil Using Crushed Concrete

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