Influence of Fly Ash on Unconfined Compressive Strength of Cement-Admixed Clay at High Water Content

Jongpradist, Pornkasem; Jumlongrach, Narongrit; Youwai, Sompote; Chucheepsakul, Somchai

doi:10.1061/(asce)0899-1561(2010)22:1(49)

Cited by 92 publications

(36 citation statements)

References 19 publications

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“…The soft Bangkok clay used in this study was retrieved from an area inside the King Mongkut's University of Technology Thonburi at a depth around 4 m. Their index properties are similar to those reported in previous studies (e.g., Jongpradist et al, 2010), and are tabulated in Table 1. The cement used in this study is Type I Portland cement.…”

Section: Test Materials and Test Programsupporting

confidence: 59%

Influence of Curing Stress on One-Dimensional Yielding of Cement-Admixed Bangkok Clay at High Water Content

Jongpradist¹,

Youwai²,

Manorat³

et al. 2011

Soils and Foundations

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The in‰uence of curing stress on the one-dimensional compression characteristics of cement-admixed clay at high water content is investigated by oedometer tests, with special attention paid to the primary vertical yield stress. From the test results, the stress acting during the formation of cementation plays an important role in the one-dimensional compression characteristics of cement admixed clay. The stress compresses the treated clay and results in an increase in the vertical yield stress. For the cement-admixed clay studied, the eŠect of the curing stress inherently re‰ects on the after-curing void ratio. Therefore, the primary vertical yield stress in one-dimensional compression is a function of the after-curing void ratio and the ratio of the clay water content to the cement content ratio.

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Section: Test Materials and Test Programsupporting

confidence: 59%

Influence of Curing Stress on One-Dimensional Yielding of Cement-Admixed Bangkok Clay at High Water Content

Jongpradist¹,

Youwai²,

Manorat³

et al. 2011

Soils and Foundations

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“…Type I Portland cement with a specific gravity (G s ) of 3.14 is used in this study. From the previous study [28], the minimum cement content of 10% is required for partial cement replacement of ground fly ash. For future development, the mixture strength for building foundation is expected to be as high as 1.5 MPa [29].…”

Section: Methodsmentioning

confidence: 99%

“…Before utilizing in the experiments, the RHA was ground to be finer by the Los Angeles abrasion machine. e gradation of RHA used in this study is controlled to achieve similar grain size distribution of the fly ash used in previous research [28] for comparison.…”

Section: Methodsmentioning

confidence: 99%

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Efficiency of Rice Husk Ash as Cementitious Material in High‐Strength Cement‐Admixed Clay

Jongpradist

Homtragoon

Sukkarak

et al. 2018

Advances in Civil Engineering

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e potential and efficiency of using rice husk ash (RHA) to add up or partially replace Portland cement in deep cement mixing technique are examined. A series of unconfined compression tests on cement-RHA-stabilized clay are conducted to investigate the influence of RHA on the mixture properties. Special attention is paid to its efficiency for increasing the strength by partial cement replacement to obtain high-strength soil cement, and it is compared with fly ash. Test results indicate that up to 35% of RHA could be advantageously added up to enhance the strength if the cement content in the mixture is larger than 10%. e RHA enhances the strength of cement-admixed clay by larger than 100% at 28 days. For curing time of 14 and 28 days, the RHA exhibits higher efficiency on Portland cement replacement when the cement and overall cementitious contents are not less than 20 and 35%, respectively. e optimum condition for high-strength mixture is achieved when RHA is added to the 20% cement content mixture. When compared with fly ash of similar grain size, the efficiency of RHA is higher when the content to be added is greater than 15%. is indicates the suitability of RHA for use in high-strength soil-cement.

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“…Three soil types (silt, silty clay and laterite) treated with cement (7% -13%) in Malaysia E 50 = (100 -326) qu [55] Swedish clay treated with cement and lime (200 kg/m 3 (18%-24%)) E 50 = (53 -92) qu [56] Bangkok soft clay with high water content treated with cement (5% -35%) and fly ash (5% -30%) E 50 = (96 -129) qu [45] Marine sediments in France treated with cement, lime and fly ash (3% -9%) E 50 = (60 -170) qu [57] Swedish clayey silt soil treated with cement (1% -7%) E 50 = (16 -85) qu [42] Swedish clayey silt soil treated with Petrtit T (2% -7%) E 50 = (14 -24) qu Present study binders as the reduction in cement content will contribute significantly to the environmental balance and to saving money for construction.…”

Section: Methodsmentioning

confidence: 99%

Stabilization of Clayey Silt Soil Using Small Amounts of Petrit T

Al-Jabban¹,

Knutsson²,

Laue³

et al. 2017

ENG

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Effects of using small amounts of a Petrit T, a by-product of manufacture sponge iron, to modify clayey silt soil were investigated in this study. Petrit T was added at 2%, 4% and 7% of soil dry weight. A series of unconfined compressive strength tests, consistency limits tests and pH tests were conducted at 7, 14, 28, 60 and 90 days of curing periods to evaluate the physical and mechanical properties of treated soil. Results indicated improving in the unconfined compressive strength, stiffness and workability of treated soil directly after treatment and over time. Increasing in soil density and decreasing in water content were observed, with increasing Petrit T content and curing time. The pH value was immediately increasing after treatment and then gradually decreased over time. Failure mode gradually changed from plastic to brittle behavior with increasing binder content and curing time. The outcomes of this research show a promising way of using a new by-product binder to stabilize soft soils in various engineering projects in order to reduce the costs which are associated with of excavation and transportation works.

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Influence of Fly Ash on Unconfined Compressive Strength of Cement-Admixed Clay at High Water Content

Cited by 92 publications

References 19 publications

Influence of Curing Stress on One-Dimensional Yielding of Cement-Admixed Bangkok Clay at High Water Content

Influence of Curing Stress on One-Dimensional Yielding of Cement-Admixed Bangkok Clay at High Water Content

Efficiency of Rice Husk Ash as Cementitious Material in High‐Strength Cement‐Admixed Clay

Stabilization of Clayey Silt Soil Using Small Amounts of Petrit T

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