Effect of industrial by-products on the strength of stabilized dispersive soil

Mohanty, S.; Roy, Nagendra; Singh, Suresh Prasad; Sihag, Parveen

doi:10.1080/19386362.2019.1654281

Cited by 14 publications

(5 citation statements)

References 27 publications

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“…The scanning electron microscope (SEM) technique has been used in recent research to identify the microstructure of various civil engineering materials under different conditions. Most research on stabilized base/subbase materials was able to compare material microstructures with different stabilizer dosages (Jamsawang et al 2020;Mohanty et al, 2019;Baghabra Al-Amoudi et al, 2017;Hou et al, 2016;Kang et al, 2015;Solanki and Zaman, 2012;Solanki et al, 2007) curing durations (Vichan et al, 2013;Lav et al, 2006), and water contents (Beckett and Ciancio, 2014;Ribeiro et al, 2016). This method is effective in observing the formation of hydration gel between the stabilized material particles, thus provide a microscale explanation on strength development due to stabilization.…”

Section: Microstructure Using Sem Observation and Edx Analysismentioning

confidence: 99%

“…Fly ash alone presents a microstructure with rather smooth spherical particles of different sizes (Solanki and Zaman, 2012;Horpibulsuk et al, 2009;Solanki et al, 2007;Mohanty et al, 2019) and the small particles are sometimes gathered together in clusters or around a large grain (Kang et al 2015), so that particle distribution can be locally heterogeneous. Lignite fly ash can show however a more irregular pseudo-sphere microstructure (Terzic et al, 2013).…”

Section: Microstructure Using Sem Observation and Edx Analysismentioning

confidence: 99%

“…Needle-shaped particles can be observed in paste backfill containing a hard rock mine tailing bound with fly ash-blended cement (Niroshan et al, 2018) or needle-like crystal can be formed between sodium bentonite dispersive soils and cementitious compounds containing ground granulated blast furnace slag, cement clinker, and fly ash (Mohanty et al, 2019) after 28 curing days. However, some unreacted spherical particles of fly ash are usually still visible too, even if they generally served as nucleation sites for the growth of the hydration products.…”

Section: Microstructure Using Sem Observation and Edx Analysismentioning

confidence: 99%

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Microstructural behaviour of quarry fines stabilised with fly ash-based binder

Zhang

Miksic

Castillo

et al. 2022

Road Materials and Pavement Design

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Previous research has reported the possibility of stabilized quarry fines as sustainable pavement construction material. Considering the availability of fly ash worldwide by 2030 and the promotion of circular economy, in this study fly ash-based material is selected as the stabilizer. The highlight of this study is to investigate the viability of such stabilized material for high volume applications in pavement structures, and to add to the current knowledge on mechanical performance from the perspective of mineralogy, microstructure, and chemical compositions of the material. To assess these properties, laboratory tests were performed including unconfined compressive strength (UCS) test, mineralogical analysis, and investigations on microstructure by Scanning Electronic Microscope (SEM) and Energy Dispersive X-Ray Spectroscopy (EDX). Calcium was found to be the element with most variability in mass with applications of different binders, and the UCS increased proportionally as the ratio of CaO/SiO2 or CaO/(SiO2+Al2O3) increased. As curing time accumulates to 28 days, more cementitious reaction products were generated and observed, and the void to solid ratio found reduced in part of samples, possibly leading to improvements in the UCS.

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Section: Microstructure Using Sem Observation and Edx Analysismentioning

confidence: 99%

Section: Microstructure Using Sem Observation and Edx Analysismentioning

confidence: 99%

Section: Microstructure Using Sem Observation and Edx Analysismentioning

confidence: 99%

See 1 more Smart Citation

Microstructural behaviour of quarry fines stabilised with fly ash-based binder

Zhang

Miksic

Castillo

et al. 2022

Road Materials and Pavement Design

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“…Moreover, due to the fact that SFSS is alumino-silicates, the response of CaO with the SFSS structure generates CSH and CAH, which equalize the ionic bond in the structure of SFSS minerals and reduce the exchange capacity of the cation for water molecules. According to Mohanty et al 45 , the depletion in moisture retention capacity can be ascribed to the presence of stabilizing agents that coat the SFSS molecules, causing them to bind together and fill the voids within the soil matrix. This process leads to a decrease in pore space and moisture content.…”

Section: Resultsmentioning

confidence: 99%

Experimental investigations on physico-mechanical properties of kaolinite clay soil stabilized at optimum silica fume content using clamshell ash and lime

Zaini,

Hasan,

Almuaythir

et al. 2024

Sci Rep

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This investigation examines the effect of clamshell ash (CSA) and lime additives on the physico-mechanical characteristics of kaolinite clay soil stabilized at the optimum silica fume content. Laboratory tests were performed to assess plasticity, shrink-swell characteristics, compaction characteristics, unconfined compressive strength (UCS), shear strength characteristics, mineralogical and morphological microstructure characteristics of stabilized soil specimens. The kaolinite clay soil was stabilized at its optimum silica fume content (6%) to produce the highest strength and was altered with three non-identical proportions of clamshell ash and lime (3%-9%). Cylindrical soil specimens, 76 mm in height and 38 mm in diameter, were moulded and treated for curing periods of 1, 7, 14, and 30 days to examine the strength of the altered soil. The findings revealed that, adding clamshell ash and lime significantly alters the plasticity, shrink-swell, maximum dry unit weights, and optimum moisture contents of the silica fume-stabilized soil. In terms of strength, the beneficial effects of CSA and lime additives were found to be more significant with more extended curing periods. Incremental increases in curing periods resulted in further enhancements in UCS, cohesion, and internal friction angle, indicating continued strength development over time. Microstructural analysis using field emission scanning electron microscopy and X-ray diffraction provided insights into the interparticle bonding mechanisms and microstructural changes induced by the addition of CSA and lime. The emergence of cementitious phases and pozzolanic responses between soil particles and stabilizers contributed to the densification and strengthening of the stabilized soil matrix. The findings of this study provide valuable insights into the potential of clamshell ash and lime additives to enhance the engineering properties of kaolinite clay soil stabilized with silica fume. These results have implications for sustainable soil stabilization practices, offering a promising approach to improve the performance of soils for various engineering applications, including construction and geotechnical projects.

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“…Bu çalışmada 6 adet majör ve minör oksitin, farklı kombinasyonlarından oluşan bağımsız değişken kümeleri ile bağımlı değişken olan dispersibilite sınıfının tahmini için oluşturulacak modellerde kullanılacak veriler literatürde yer alan çalışmalardan elde edilmiştir [29][30][31][32][33][34][35][36][37][38][39][40][41][42][43][44][45][46]. Bu kombinasyonlar; Tablo 3'de majör, majör-minör ve minör oksitlerden oluşan bağımsız değişken kümelerinden oluşturulmuştur.…”

Section: Modelunclassified

Zeminlerin dispersibilite sınıfının XRF analiz sonuçlarına dayalı olarak Genetik Programlama (GP) ile tahmini

TOPÇU>

Seyrek

2022

NÖHÜ Müh. Bilim. Derg.

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Dispersif zeminler, dolgu barajların çekirdek yapısında kullanıldığında erozyon hassasiyetlerinin çok yüksek olması nedeniyle içsel erozyona neden olarak bu tür barajların göçmesine neden olmaktadırlar. Bu tür zeminlerin tasarım aşamasında belirlenerek dolgu barajların inşaatında kullanılmaması gerekmektedir. Dispersif zeminler; fiziksel (Dağılma deneyi, çifte hidrometre deneyi ve iğne deliği deneyi) ve kimyasal (Boşluk sıvısının kimyasal içeriği) deneyler ile belirlenebilmektedir. Bu çalışmada ise alternatif bir yöntem olarak XRF (X-Işını Flöresan) analiz sonuçları kullanılarak genetik programlama (GP) yardımıyla zeminlerin dispersibilite sınıfının tahmin edilebilmesi için bilgisayar modelleri geliştirilmiştir. Genetik İfade Programlama (GİP) ile oluşturulan tahmin modellerinde kullanılan 181 adet verinin % 66.9’u eğitim verisi; geri kalan ise ise test verisi olarak kullanılmıştır. Majör (SiO2, Al2O3) ve minör (MgO, CaO, Na2O, K2O) oksitlerin girdi verisi olarak kullanıldığı bilgisayar modellerinde zeminler dispersif (D) ve dispersif olmayan zeminler (ND) olarak yüksek oranlarda başarılı bir şekilde tahmin edilmektedir. En başarılı tahmin modeli tüm veri seti içinde SiO2, Al2O3, MgO, CaO ve Na2O girdi verilerinden oluşan modeldir.

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Effect of industrial by-products on the strength of stabilized dispersive soil

Cited by 14 publications

References 27 publications

Microstructural behaviour of quarry fines stabilised with fly ash-based binder

Microstructural behaviour of quarry fines stabilised with fly ash-based binder

Experimental investigations on physico-mechanical properties of kaolinite clay soil stabilized at optimum silica fume content using clamshell ash and lime

Zeminlerin dispersibilite sınıfının XRF analiz sonuçlarına dayalı olarak Genetik Programlama (GP) ile tahmini

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