Effect of adding natural pozzolana on geotechnical properties of lime-stabilized clayey soil

al-Swaidani, Aref M.; Hammoud, Ibrahim; Meziab, Ayman

doi:10.1016/j.jrmge.2016.04.002

Cited by 182 publications

(93 citation statements)

References 15 publications

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“…For cement content between 5% to 20%, soils of lower plasticity index exhibits higher strength enhancement compared to soils with slightly higher plasticity [30]. However, with the inclusion of GGBS/PFA and blended with less than 5% Cement, soils of higher plasticity also increases in strength upon treatment due to Ca 2+ exchange and pozzolanic reaction [51]. Soils with organic content (peat) possesses very low shear strength, low specific gravity and high-water content [52].…”

Section: Undrained Shear Strengthmentioning

confidence: 99%

Effect of Organic Matter on Swell and Undrained Shear Strength of Treated Soils

Abbey

Olubanwo²,

Ngambi³

et al. 2019

JCCEE

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This paper presents a laboratory and statistical study on swell and undrained shear strength of cemented organic clays blended with eco-friendly (by-product) cementitious materials such as ground granulated blast slag (GGBS) and cement kiln dust (CKD). The presence of organic matter in soils can be very problematic especially during construction of infrastructures such as roads and foundations. Therefore, experimental and statistical investigations are crucial to further understand the effect of organic matter on swell and strength performance of soils treated with by-product materials (GGBS and CKD). Five artificially synthesised organic clays with 0%, 5%, 10%, 15% and 20% organic matters were mixed with 20% cement during the first phase of mixing. In the second phase, cement content was reduced to 4% and blended with 12% GGBS and 4% CKD respectively. All mixed samples were cured up to 56days and subjected to undrained triaxial test and onedimensional oedometer swell test. The undrained shear strength of the untreated soils decreases from 22.47kPa to 15.6kPa upon increase in organic matter from 0-20%. While the swell increases from 1.17% to 3.83% for the same range of 0-20% organic matter. The results also show improvement on strength and swell upon addition of 20% cement for all investigated samples. For samples treated with 4% cement and inclusion of 12% GGBS and 4% CKD, the treated soils showed better performance in terms of swell potential due to reduction in plasticity compared to the plasticity of soils treated with 20% cement. Undrained shear strength increases from 632kPa to 804.9kPa and from 549.8kPa to 724.4kPa with reduction in organic matter upon addition of 20% CEM and 4% CEM: 12% GGBS: 4% CKD after 56days. The results obtained show that the inclusion of GGBS and CKD reduced swell and increases undrained shear strength irrespective of the percentage of organic materials due to cementation effect. However, results of the statistical studies show that the presence of organic matter influences the extent of performance of the cement, GGBS and CKD treated soils.

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Section: Undrained Shear Strengthmentioning

confidence: 99%

Effect of Organic Matter on Swell and Undrained Shear Strength of Treated Soils

Abbey

Olubanwo²,

Ngambi³

et al. 2019

JCCEE

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“…A tabela 2 mostra que o resíduo de placas cerâmicas é composto principalmente por SiO 2 (69,09%) e Al 2 O 3 (15,40%), que são os principais componentes de pozolanas naturais [13,14].…”

Section: Caracterização Do Resíduo De Placas Cerâmicasunclassified

“…A análise granulométrica mostrou que 100% das partículas são menores que 100 µm, 90% das partículas são menores que 26 µm e 50% são menores que 5,5 µm, indicando que a faixa granulométrica do resíduo está de acordo com a granulometria para um material pozolana, onde segundo a norma ABNT NBR 12653:2012 [14,15], no máximo 34% das partículas do material podem estar acima de 45 µm.…”

Section: Caracterização Do Resíduo De Placas Cerâmicasunclassified

Substituição Do Cimento Portland Por Resíduo De Placa Cerâmica Em Argamassa

Formigoni¹,

Godinho²,

Junca³

et al. 2019

Tecnol. Metal. Mater. Min.

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2176-1523 © 2019 da publicação Associação Brasileira de Metalurgia, Materiais e Mineração. Publicado pela ABM. Este é um artigo de acesso aberto distribuído sob os termos da licença Creative Commons CC BY-NC-ND (Attribution-NonCommercial-NoDerivs)https://creativecommons.org/licenses/by-nc-nd/4.0/. a Resumo O objetivo deste trabalho é estudar a substituição do cimento Portland por resíduo de placa cerâmica em argamassa. O resíduo de placa cerâmica foi cominuído e caracterizado através de análise química e análise granulométrica. Em seguida, foram confeccionadas misturas com substituições de 5%, 12% e 20% do cimento Portland e determinados os índices de consistência, absorção da água, índice de vazios, massa específica, resistências à tração na flexão e resistência compressão axial para cada mistura. Os resultados mostraram que o resíduo de placa cerâmica é composto principalmente por SiO 2 (69,09%) e Al 2 O 3 (15,4%). A substituição de 5 e 12% ocasionou uma diminuição da porosidade dos corpos de prova. Os testes de resistência à tração na flexão mostraram um aumento nesta propriedade. Entretanto, os testes de resistência à compressão axial apresentaram um decréscimo de 0,9% e 2,5% para as substituições de 5 e 12%. Palavras-chave: Resíduos de placas cerâmicas; Cimento Portland; Resíduos sólidos. AbstractThe aim of this paper is to study the replacement of Portland cement by ceramic plates waste into mortar. The ceramic plate waste was milled and characterized through chemical analysis and particle size analysis. Then, it was elaborated mixtures in order to replace 5, 12 and 20 wt.% of Portland cement by ceramic plates waste. In addition, the consistency indices, water absorption, void index, specific mass, tensile strength in flexion and axial compression were determined for each mixture. The results showed that the ceramic plates waste are composed by of SiO 2 (69.09 wt.%) and Al 2 O 3 (15.4 wt.%). The replacement of 5 and 12 wt.% decreased the mortar porosity. The tensile strength in flexion assays showed an increase on this property. However, the axial compression tests presented a decrease of 0.9% and 2.5% for replacement of 5 and 12 wt.%.

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“…Three forms of lime have widely been used: quicklime (calcium oxide -CaO), hydrated lime (calcium hydroxide -Ca(OH) 2 ) and hydrated lime slurry [2]. Many researchers reported the positive combined effect of adding lime and mineral admixtures on the stabilization of expansive clayey soil [3][4][5][6]. In the study of Al-Swaidani et al [6], lime and natural pozzolan were added to soil within the range of 0%-8% and 0%-20%, respectively.…”

Section: Introductionmentioning

confidence: 99%

“…Many researchers reported the positive combined effect of adding lime and mineral admixtures on the stabilization of expansive clayey soil [3][4][5][6]. In the study of Al-Swaidani et al [6], lime and natural pozzolan were added to soil within the range of 0%-8% and 0%-20%, respectively. Their test results revealed that the plasticity index (PI) decreased from 29% to 3% when 8% lime and 20% natural pozzolan were added to the investigated clayey soil.…”

Section: Introductionmentioning

confidence: 99%

Thermally Treated Clay as a Stabilizing Agent for Expansive Clayey Soil: Some Engineering Properties

al-Swaidani

Hamood

Meziab

2018

Studia Geotechnica Et Mechanica

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The objective of this research was to investigate the effect of adding thermally treated clay on some engineering properties of the untreated expansive clayey soil. Three expansive clayey soil samples obtained from three different sites in the south of Syria have been investigated. They were thermally treated up to three different levels (450°C, 650°C and 850°C) for 3 hours. Three replacement levels of thermally treated clay were used, i.e. 0%, 10% and 20%. The X-ray diffractometer (XRD) technique has been used to detect the crystalline and glassy phase in the clayey samples before and after the thermal treatment. Pozzolanic activity of the thermally treated clayey soil has been studied using the modified Chapelle test and the mechanical strength test at each of the temperature levels. Atterberg limits, compaction, free swell, swelling pressure and linear shrinkage have particularly been investigated. Test results revealed the positive effect of thermally treated clay when added to the natural soil. Plasticity index (PI) was reduced by about 60% when 20% thermally treated clay was added to the natural soil. In addition, 6% lime was added to further investigate the combined effect of lime and calcined clay on the properties of the clayey expansive soil. All investigated properties were significantly improved when 20% thermally treated soil and 6% lime were added together. For instance, swelling pressure and linear shrinkage values were reduced to less than 15% or even much less when compared with those of the natural soil. Scanning electron microscopy (SEM) and energy-dispersive X-ray (EDX) analysis were employed as well.

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Effect of adding natural pozzolana on geotechnical properties of lime-stabilized clayey soil

Cited by 182 publications

References 15 publications

Effect of Organic Matter on Swell and Undrained Shear Strength of Treated Soils

Effect of Organic Matter on Swell and Undrained Shear Strength of Treated Soils

Substituição Do Cimento Portland Por Resíduo De Placa Cerâmica Em Argamassa

Thermally Treated Clay as a Stabilizing Agent for Expansive Clayey Soil: Some Engineering Properties

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