Strength and Durability of Gypseous Soil Treated With Waste Lime and Cement

Al-Zubaydi, A. H.; Al-Kiki, Ibrahaim M.; Al-Obaydi, Moataz A.

doi:10.33899/rengj.2010.27985

Cited by 7 publications

(4 citation statements)

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“…Researchers and practitioners have been investigating and analyze numerous methods, materials, and techniques in order to find the best environmentally-friendly, innovative and economical practices for soil stabilization. Special focus has been paid to investigate the effects of several locally available materials as potential stabilizers in achieving this purpose [1][2][3][4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Improving the Characteristics of a Soft Clay Soil Using Cement Activated Low-Calcium Fly Ash

Majeed

Shihab

Abbas

et al. 2021

DJES

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In this research, the potential improvement of some geotechnical characteristics of soft clay soil using the low Calcium fly ash was evaluated. (These characteristics include unit weight, shear strength, compaction characteristics and soil plasticity characteristics). In addition, the X-ray diffraction test was performed to measure the mineralogical changes in the soft clay soil when the low Calcium fly ash is added. The ordinary Portland cement was used to activate the fly ash. The total percent of flash and cement was10% to investigate the variation in the effectiveness of activation. The optimum moisture content that which computed by the compaction test was adopted in the rest of the experimental program. The test results revealed that the cement could be used to improve the activating of the fly ash efficiently. The maximum value of dry density was marginally affected due to activation from 1.747 to 1.738 g/cm3 along with a corresponding change in optimum water content from 17.45 to 15.5 %. The soil cohesion parameter increased from 188 to 206 kN/m2 whereas the angle of internal friction rose from about 56.7o to 59.1o. Finally, the results of the unconfined compression test reveal that the cement-activated fly ash could present better results than those obtained from a 28-days curing cement.

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Section: Introductionmentioning

confidence: 99%

Improving the Characteristics of a Soft Clay Soil Using Cement Activated Low-Calcium Fly Ash

Majeed

Shihab

Abbas

et al. 2021

DJES

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“…The addition of lime has an immediate effect on the agglomeration and flocculation of clay particles due to cation exchange on the surface of soil particles. The result of this reaction in the short term is mainly to improve the plasticity and workability of soil [12][13][14]. In the long term, this reaction results in the formation of cementitious C-S-H and C-S-A-H materials [15].…”

Section: Introductionmentioning

confidence: 99%

Impact of wetting—drying cycles on the mechanical properties of lime-stabilized soils

Maafi

Akchiche

Rı́os

2019

Int. J. Pavement Res. Technol.

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This article addresses the results of an experimental study on the behavior of soil; this soil was exposed to long -term treatment with lime and numerous wetting-drying cycles. This research investigated the effect of a wide range of lime contents on the soil volume, soil water content evolution and durability (unconfined compressive strength (UCS), plasticity index (PI) and cation exchange capacity (CEC)) for stabilized s oil in contact with water. This experimental study was performed on soil treated with lime (varying from no lime to 8%) corresponding to three levels of improvement: soil improvement only, stabilization and insensitivity to water, and long-term stabilization during wetting-drying cycles. The results indicated that the UCS increases, PI and CEC decreases with the lime level. For lime levels above 4%, the behavior of the treated soil under wetting -drying was satisfactory. Mineralogical analyses indicated that the formation of calcium silicate hydrate C-S-H, ettringite C-S-A-H is responsible for the increased or decreased strength of the treated soil. CaO, SiO2 and Al2O3 were three important minerals responsible for the increase or decrease in soil sample stabilization. Simple model executed in JMP statistical software was proposed and validated. We note that CaO and SiO2 have the most influential effects by very low values of probability for the responses studied, which confirms the hypothesis of that these models can be used to model UCS and PI in curing time and wett ing-drying cycles.

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“…Also, they suggested that, the designed soil strength should be taken after seven F-T cycles. Generally, gypseous soils are used as foundation layer along the many parts of the world (Al-Obaydi et al 2010). Furthermore, the F-T durability of these soils is vital to assist their using in earthwork structures due to the varying their properties from site to the other depending on the gypsum percent and soil compounds (Aldaood et al 2014).…”

Section: Introductionmentioning

confidence: 99%

Freeze-Thaw Behavior of Gypseous Soil

Al-Mukhtar

2019

ZJPAS

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This research work studied the influence of freeze-thaw (F-T) cycles and gypsum percent on the mechanical properties and durability of clayey soil. Different amount of gypsum percent (varied between 0-25%) was added to the clayey soil and subjected to 12 F-T cycles. The unconfined compressive strength UCS, P-wave velocity, gas permeability, pore size distribution and volume changes properties were measured for both un-cycled and F-T cycled samples. The tests results presented that the UCS, gas permeability and porosity values of samples influenced by F-T cycles. These values depend considerably on the amounts of gypsum percent and F-T cycles. Further, changes in soil porosity were observed during F-T cycles due to ice lenses formation and cracks propagation. Finally, the UCS, gas permeability and volume change values have been proposed to be used to evaluate extent of durability of soil samples.

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Strength and Durability of Gypseous Soil Treated With Waste Lime and Cement

Cited by 7 publications

References 0 publications

Improving the Characteristics of a Soft Clay Soil Using Cement Activated Low-Calcium Fly Ash

Improving the Characteristics of a Soft Clay Soil Using Cement Activated Low-Calcium Fly Ash

Impact of wetting—drying cycles on the mechanical properties of lime-stabilized soils

Freeze-Thaw Behavior of Gypseous Soil

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