Coal combustion residue as structural fill material for reinforced soil structures

Pant, Aali; Ramana, G. V.; Datta, Manoj; Gupta, Sanjay

doi:10.1016/j.jclepro.2019.05.354

Cited by 39 publications

(12 citation statements)

References 31 publications

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“…It is well known that the mechanical and durability properties of concretes depend on the grain size distribution of BA [6,8,10]. Since the grain size of BA particles of this study resembles the grain size of fine aggregates with low percentage of silt-clay, it could be concluded that BA can successfully replace the fine aggregates in the manufacturing of concrete [9,10]. Moreover, the particle size distribution satisfies the gradation criteria for utilization as strengthened/reinforced soil (backfill material) [8].…”

Section: Granulometry and Minerochemical Compositionmentioning

confidence: 52%

“…This amorphous material is attributed either to carbonaceous matter or to the inorganic fused ash material [2,21]. The presence of unburnt carbon has frequently been considered beneficial for an overall improvement in concrete manufacturing [9]. were also sporadically assigned with concentrations up to 3 wt%.…”

Section: Granulometry and Minerochemical Compositionmentioning

confidence: 99%

“…Bottom ash is used globally in concrete industry, road constructions, geotechnical and environmental applications, e.g. as aggregate in lightweight concrete, as fine aggregate in cement mortars, as a raw material in the cement clinker raw meal, as a soil amendment, in asphalt mixes etc.. [5][6][7][8][9][10][11]. In Greece, it is entirely deposited in abandoned lignite mine sites and/or in landfills.…”

Section: Introductionmentioning

confidence: 99%

“…Minor amounts of TiO 2 (up to 2.31 wt%) and K 2 O (up to 2.72 wt%) were also found in some samples, while Na 2 O was absent. The high amounts of silica and alumina contents, apparently in a glassy-amorphous state, are indicative for pozzolanic properties, while the high calcium contents suggest hydraulic/self-cementing properties[2,[8][9][10][11].…”

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confidence: 99%

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A comprehensive analytical characterization of Greek lignite bottom ash samples

et al. 2021

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Bottom ash samples were collected from four lignite power plants of Greece. Granulometric analysis was executed and after homogenization four distinct fractions (>1.25, 0.63-1.25, 0.18-0.63, <0.18 mm) were obtained. The samples were analyzed by X-Ray Diffraction (XRD) and Energy Dispersive System (EDS), while thermogravimetry (TG/DTG) and stereomicroscope viewing were applied for the coarse fractions. Furthermore, proximate analysis (moisture, ash, volatiles, fixed carbon) was undertaken and Loss on Ignition (LOI) and calorific values were determined. The particle size distribution revealed that bottom ash satisfies the gradation criteria for concrete and geotechnical applications. The mineral composition included mainly amorphous matter, quartz, plagioclase, calcite and gehlenite and minor amounts of pyroxene, portlandite, hematite, micas etc.. The chemical analysis showed Si, Ca, Al, Mg, Fe, S as major and Ti and K as minor chemical elements, indicating high slagging and fouling potential within the thermal chambers. Based on the chemistry and mineralogy of the bottom ash samples, a potential utilization in concrete manufacturing is discussed, taking into account certain limitations. Based on LOI, proximate analysis, calorific values and TG/DTG profiles of the coarse fractions (>1.25 mm), certain differences in the characteristics of the bottom ash of the younger and the three older power plants were observed. High amounts of unburnt carbon were determined in the coarse fraction (>1.25 mm) of all plants except the younger one, indicating a problematic combustion within the chambers and a potential of reburning these coarse material in a waste to energy application.

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Section: Granulometry and Minerochemical Compositionmentioning

confidence: 52%

Section: Granulometry and Minerochemical Compositionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

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A comprehensive analytical characterization of Greek lignite bottom ash samples

et al. 2021

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“…Shao [8] simulated the mechanical properties of the reinforcement-soil interface with the particle flow method and obtained the effect of the geotextile and geogrid under different normal stresses. Pant et al [9] explored the mechanical properties of coal combustion residues as structural filling materials for reinforced soil structures. Cardile et al [10] studied the influence of cyclic load history on the interaction of reinforcement and soil.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Mechanical Properties of Reinforced Soil Interface under Dry‐Wet Cycle

Huang

Hou

et al. 2021

Advances in Civil Engineering

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The reinforced soil-retaining wall has been widely used in coastal projects, and the dry-wet cycles influence the mechanical properties of the reinforced soil interface. This study conducts macro-micro tests and selects four different water content samples of reinforced soil with five types of overburden pressure conditions and three sets of dry-wet cycles, with a total of 60 working conditions. The pull-out test was used to study the mechanical properties of the reinforced soil interface. The scanning electron microscope was used to observe the microscopic characterization of the particles under different working conditions. Through the analysis of the experimental results, we can draw the conclusion as follows. (1) The friction coefficient of the reinforced soil interface decreases with the increase of the number of dry and wet cycles. (2) The apparent cohesion of soil-reinforcement interface decreases with the increase of the number of dry-wet cycles. After 30 dry-wet cycles, the apparent cohesion of the soil-reinforcement interface with water content of 14% is the maximum 5.91 kPa. The variation law of cohesion derived from microstructure analysis conforms to the laws and conclusions obtained by the experiment. (3) The shear stress of the reinforced soil is linearly related to the normal stress, which is in accordance with Coulomb’s law.

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Influence of geogrid reinforcement on dynamic characteristics and response analysis of Panki pond ash

Chowdhury,

Patra

2023

Nat Hazards

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Coal combustion residue as structural fill material for reinforced soil structures

Cited by 39 publications

References 31 publications

A comprehensive analytical characterization of Greek lignite bottom ash samples

A comprehensive analytical characterization of Greek lignite bottom ash samples

Experimental Study on Mechanical Properties of Reinforced Soil Interface under Dry‐Wet Cycle

Influence of geogrid reinforcement on dynamic characteristics and response analysis of Panki pond ash

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