Improvement of geotechnical properties of silty sand soils using natural pozzolan and lime

Abbasi, Nader; Mahdieh, Masoud

doi:10.1186/s40703-018-0072-4

Cited by 23 publications

(7 citation statements)

References 17 publications

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“…Therefore, the aptitude of soils for compaction and their workability are improved. Similar findings are reported in the literature, as for example in [7] where the optimum moisture content of the samples increases and maximum dry density decreases as pozzolan and lime content increases. This is explained by [7] as follows: by increasing the amounts of additives, which are finer than silty sandy soil, the treated sample tend to be finer and having higher void ratio and thereby causes the increasing of optimum water content., which always lead to a decrease of the maximum dry density.…”

Section: Resultssupporting

confidence: 91%

“…Changes in the clay fraction show a wide range of response to the addition of lime based binder although for most of the soils there is a gradual and continuous decrease in clay content with increasing lime content. Clearly the alteration of the clay fraction and the formation of particle aggregates is complex and shows differing behaviour over the full range of added binder [7].…”

Section: Resultsmentioning

confidence: 99%

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Experimental studies to determine the physico-mechanical characteristics of soils improved with special hydraulic binders

Andries

Batali

2019

E3S Web Conf.

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The complexity of the construction works and site conditions, combined with environmental factors, led to the necessity of using special mineral binders with physical and chemical properties superior to the usual binders. Taking into account the above arguments, the paper presents the results of experimental laboratory studies in order to determine the physical and mechanical characteristics of soil used for a road embankment, after improvement with a special lime-based hydraulic binder. Since improvement recipes vary from one soil to another, it is important to always determine the characteristics after treatment. Also, the method of mixing the binder and soil decisively determines subsequent performance. As part of a larger study aiming at assessing the various factors of influence on the treated soil characteristics, two comparative studies were carried out, each consisting in the recipe formulation using 3 different binder ratios, the difference being given by the parameters used for specimen compaction: normal or modified Proctor test. The study followed the influence of the mechanical compaction work on the mechanical behaviour of the specimens over time after different times of curing.

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Section: Resultssupporting

confidence: 91%

Section: Resultsmentioning

confidence: 99%

Experimental studies to determine the physico-mechanical characteristics of soils improved with special hydraulic binders

Andries

Batali

2019

E3S Web Conf.

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“…Increasing the optimum moisture content in the treated soil is always accompanied with reduction in the maximum dry density when the precipitate is ne particles -CaCO 3 precipitatesince the specic gravity of the soil and additives is higher than that of water. 62 The precipitation of calcium carbonate crystals between soil particles as seen by SEM conrms the biocementation phenomena of these supernatants and might be responsible for the desired repairing effect on cracks and soil stabilization.…”

Section: Discussionmentioning

confidence: 99%

Biocementation of soil by calcite/aragonite precipitation usingPseudomonas azotoformansandCitrobacter freundiiderived enzymes

et al. 2019

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“…Abbasi et al [8], investigated the influence of different amounts of lime and natural pozzolan on geotechnical properties of a silty sand. Evaluation of compaction characteristics, compressive strength and bearing capacity of the treated soil had been done and compaction test results showed that addition of both lime and pozzolona alone and with together cause increase in optimum moisture content and decrease in maximum dry density.…”

Section: Studies On Lime and Soilmentioning

confidence: 99%

Study on effect of laboratory roller compaction on unconfined compressive strength of lime treated soils

Nagesh¹,

Jagadeesh²,

Nithin³

2021

Geo-Engineering

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Expansive soils are problematic due to their swell—shrinkage behavior and low compressive strength. They are modified generally with additives such as lime, fly ash, and various other inorganic and organic materials. Chemical stabilization treatments can improve expansive soil properties for its reuse in geotechnical applications. The present study investigates the properties of two types of subgrade soil treated with Lime and compacted by three different methods in the laboratory. The study is mainly focused to bring out the effect of different methods of compaction on the unconfined compressive strength of Lime treated soils and untreated soils. Laboratory investigation included pH, Atterberg limits, cation exchange capacity (CEC), compaction, unconfined compression strength (UCS), California Bearing Ratio (CBR), Scanning Electron Micrographs (SEM) and EDAX before and after lime treatment. Tests were performed on lime treated soils (2, 4, 6 and 8% of lime). The soil samples for unconfined compressive strength test were prepared by static, dynamic and roller compaction methods in the laboratory. Roller compaction was performed using indigenously fabricated Roller compactor cum Rutting Analyzer (RCRA). The results indicate that dry unit weight and UCS of roller compacted lime treated soil is lower than that of dynamic compacted soil. However, dry unit weight and UCS of lime treated roller compacted soil are closer to that of statically compacted soil. Cation exchange capacity of both soils before and after treatment with lime were examined, CEC reduced with increase in lime content.

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Improvement of geotechnical properties of silty sand soils using natural pozzolan and lime

Cited by 23 publications

References 17 publications

Experimental studies to determine the physico-mechanical characteristics of soils improved with special hydraulic binders

Experimental studies to determine the physico-mechanical characteristics of soils improved with special hydraulic binders

Biocementation of soil by calcite/aragonite precipitation usingPseudomonas azotoformansandCitrobacter freundiiderived enzymes

Study on effect of laboratory roller compaction on unconfined compressive strength of lime treated soils

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