Strength characteristics and stability analysis of GGBS stabilised fly ash-overburden dump

Rajak, Tarun Kumar; Yadu, Laxmikant; Chouksey, Sandeep Kumar; Dewangan, Pankaj Kumar

doi:10.1080/17480930.2019.1670327

Cited by 13 publications

(5 citation statements)

References 60 publications

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“…Several studies have been carried out to evaluate the physico-mechanical characteristics of the fly ash-OB mix material. Rajak et al [56] identified the surface characterization of materials of fly ash (Class F) and OB material using scanning electron microscope (SEM) test and found that OB material has irregular shape however, fly ash has spherical shape. The addition of fly ash in OB material provides the good packaging and bonding which improves the stability of the dump [57].…”

Section: Integration Of Fly Ash With Ob Dump Materialsmentioning

confidence: 99%

“…Gupta and Paul [57] suggested that 10-20% fly ash can be used to enhance the strength of the OB dump. Rajak et al [56] have evaluate the shear strength parameters of OB material mixed with fly ash (Class F) with and without addition of Ground Granulated Blast Furnace Slag (GGBS) and found that addition of 20% fly ash with OB material causes improvement in cohesion value by 45%. Addition of 12% GGBS in OB material with 20% fly ash, the cohesion value increased by 81% as compared to OB material.…”

Section: Shear Strength Characteristicsmentioning

confidence: 99%

“…Rajak et al [59] reported that UCS value get increased by 9.34% with the addition of 20% fly ash in OB material. Few additives were added in different proportions with the fly ash-OB mix like lime [63,64,70], clinker [71,72], cement [68], GGBS [56], and kiln dust [69] to determine the UCS value. The best suitable results of UCS value under different mix proportions of OB material, fly ash, or/and additive are described in the Table 4.…”

Section: Unconfined Compressive Strength (Ucs) Valuementioning

confidence: 99%

“…The utilization of Class C fly ash with high CaO content may reduce the dosage of additives in OB-fly ash mix. It was also reported that with the addition of 12% GGBS in OB material, utilization of fly ash up to 20% can be suitably adopted in sub-base layer of mine haul road [56].…”

Section: Unconfined Compressive Strength (Ucs) Valuementioning

confidence: 99%

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Effect of fly ash on geotechnical properties and stability of coal mine overburden dump: an overview

2020

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The management of overburden (OB) materials needs proper attention to safe mining operations. Several mine OB dump failures have been occurred due to inappropriate geotechnical and geometrical parameters. Increasing consumption of coal in thermal power plant also generates huge amount of ash which adversely affect the environment and its utilization is a great challenge. The present paper reviews the effect of fly ash on the different geotechnical properties and stability of coal mine OB dump material to explore a safe and effective utilization of fly ash. It was found that up to 30% fly ash can potentially modify the compaction characteristics, California bearing ratio value, unconfined compressive strength, and shear strength parameters of OB dump material. Based on the review, it may be suggested that fly ash-OB mix can be effectively utilized in the mine OB dump and for the mine haul road construction thus, provides an alternative mode of fly ash utilization in huge quantity.

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Section: Integration Of Fly Ash With Ob Dump Materialsmentioning

confidence: 99%

Section: Shear Strength Characteristicsmentioning

confidence: 99%

Section: Unconfined Compressive Strength (Ucs) Valuementioning

confidence: 99%

Section: Unconfined Compressive Strength (Ucs) Valuementioning

confidence: 99%

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Effect of fly ash on geotechnical properties and stability of coal mine overburden dump: an overview

2020

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“…GGBS contains silica, lime, alumina, and magnesia whose percentage may vary depending upon the raw materials, limestone flux, and type of producing iron. The use of GGBS for soil stabilization has also been documented in the literature, and it has been shown to reduce expansiveness, enhance density, and improve the characteristics of expansive soils [7,[11][12][13][14]. Sharma & Sivapullaiah, [15] illustrated that addition of GGBS and fly ash in soil stabilization can be more advantageous than utilized alone.…”

Section: Introductionmentioning

confidence: 99%

Effect of GGBS on Strength Characteristics and Stability of Pond Ash Mixed Soil Embankment

Rajak¹,

Mishra²,

Yadu

2022

IOP Conf. Ser.: Earth Environ. Sci.

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The increased usage of coal by thermal power plants results in enormous volumes of pond ash. Ground Granulated Blast Furnace Slag (GGBS) is produced in huge quantity in iron industries and is mostly utilised in the cement industry. Despite the fact that these industrial by-products have a wide range of applications, it is still conceivable to investigate the alternate mode for batch usage. The present study explores the effectiveness of GGBS in modifying the strength characteristics of a soil-pond ash mix. Pond ash was mixed with soil at 10%, 15%, 20%, and 25%, and strength behaviour were determined by analysing compaction characteristics, Unconfined Compressive Strength (UCS), bearing ratio behaviour, and shear strength parameters. The effect of GGBS addition in various amounts on the strength properties of pond ash-soil mix was also observed at various curing periods. Stability analysis was also conducted using limit equilibrium based GEOSLOPE software to evaluate the Factor of Safety (F) and stability of stabilized soil embankment. It was found from the test results that the addition of GGBS to the pond ash-soil mix improved the strength behaviours. With the inclusion of GGBS, the curing period was extended, which resulted in a substantial improvement in strength properties. Substantial improvement in factor of safety and stability of embankment was also observed by adding GGBS in pond ash-soil mix. Outcome of present study demonstrates an alternative approach for effective and safe utilization of GGBS and pond ash at optimum proportions.

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Dump Slope Stability Rating and Risk Assessment in Opencast Coal Mines: A Case Study

Sahu,

Mohanty,

Jayanthu

2023

Springer Proceedings in Earth and Environmental Sciences

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Strength characteristics and stability analysis of GGBS stabilised fly ash-overburden dump

Cited by 13 publications

References 60 publications

Effect of fly ash on geotechnical properties and stability of coal mine overburden dump: an overview

Effect of fly ash on geotechnical properties and stability of coal mine overburden dump: an overview

Effect of GGBS on Strength Characteristics and Stability of Pond Ash Mixed Soil Embankment

Dump Slope Stability Rating and Risk Assessment in Opencast Coal Mines: A Case Study

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