Strength activity and microstructure of blended ultra-fine coal bottom ash-cement mortar

Oruji, Soheil; Brake, Nicholas A.; Nalluri, Likhith; Guduru, Ramesh K.

doi:10.1016/j.conbuildmat.2017.07.088

Cited by 76 publications

(38 citation statements)

References 24 publications

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“…It has to be remembered here that the authors had already tried to improve the resistance of concrete with silica fume and the results were not as promising as the results presented here [10]. The results of this study are in agreement with the ones shown in [19], even though here, the behaviour of the slag is better, and in that case the researchers were just testing the way to improve the resistance of standard concretes, while here the additions counteract the negative effect of using a bad quality recycled aggregate in concrete. In that case, the researchers determined that the optimum amount of addition is between 9% and 23% of the mass of the total binder.…”

Section: Compressive Strengthsupporting

confidence: 84%

“…The loss of compressive strength was about 40% at 180 days; however, the use of the additions makes them gain more than 10%. This beneficial effect had already been reported [19], but in this case, it is important to highlight that these wastes can make recycled mixed aggregate suitable for use in concrete. Without these additions, recycled mixed aggregate would seriously affect the quality of concrete prepared using 30% of this aggregate.…”

Section: Compressive Strengthsupporting

confidence: 64%

“…However, even if it is true that the emissions of CO 2 are lower, this type of plants produce wastes, and in a circular economy, waste production should tend to 0 [18]. The slag produced has been proven to be efficient in terms of mechanical strength in the long term (90 days), and it is very sensitive to the fineness of the powder [19]; the reactivity of this material has been shown when it has been mixed with cement [19]. However, most of the literature refers to bottom ash produced in incinerators of municipal solid wastes (MSW), where most authors report the presence of metals, and state that this is a problem when this ash is mixed with cement [20][21][22].…”

Section: Introductionmentioning

confidence: 99%

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On the Possibility of Using Recycled Mixed Aggregates and GICC Thermal Plant Wastes in Non-Structural Concrete Elements

et al. 2019

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Industrial wastes are often used as aggregate in concrete production to promote a more sustainable construction and to reduce production costs. This article presents the results of an experimental campaign on the influence of replacing natural aggregate with several construction and demolition wastes (C&DW) as recycled aggregate, as well as the use of fly ash and slag, wastes produced in Gas Incinerator Combined Cycle (GICC) thermal power plants, in the mix design of non-structural concrete. Different percentages of natural aggregates were substituted with recycled aggregates either coming from construction and demolition wastes, or from the coarse fraction of the slags from thermic plants in the manufacture of concrete. The mechanical properties, capillary water absorption, density, carbonation, chloride ingress and sulphate resistance have been tested. The results show a decrease in properties when C&DW are used. Fine fraction of slag and fly ash has an important advantage, and can even improve the long term properties of concrete prepared with natural aggregates. Coarse fraction of slag as a recycled aggregate generally improves most of the properties of manufactured concretes.

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Section: Compressive Strengthsupporting

confidence: 84%

Section: Compressive Strengthsupporting

confidence: 64%

Section: Introductionmentioning

confidence: 99%

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On the Possibility of Using Recycled Mixed Aggregates and GICC Thermal Plant Wastes in Non-Structural Concrete Elements

et al. 2019

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“…Many spaces are occupied by stacks of CBA, and rain erosion will cause signicantly polluted soil and surface water. [1][2][3] Soil pollution is an important problem worldwide, and 82.8% of soil pollution is caused by heavy metals. The natural environment and human health are seriously threatened by heavy metal-contaminated soil (HMS), and polluted soil needs to be remediated urgently.…”

Section: Introductionmentioning

confidence: 99%

Barrier effect of coal bottom ash-based geopolymers on soil contaminated by heavy metals

et al. 2019

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“…Utilization of non-regular and creative materials, and reusing of waste materials to repay the absence of common assets and to discover elective routes for moderating the earth [5]. Many industrial by-products and waste materials such as copper slag [6], fly ash [7], waste brick, bottom ash [8], timber waste [9], ground granulated blast slag [10] were used as replacement of cement. Prosopis juliflora is a bush or little tree in the family Fabaceae, a sort of mesquite.…”

Section: Introductionmentioning

confidence: 99%

Effect of Utilizing Prosopis Juliflora Ash as Cementitious Material

S¹,

Kathirvel²,

Murali³

2018

IJET

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Since the building made of cement concrete consumes almost half of the total energy generated and accordingly accountable for huge amount of CO2 emission, it is necessary to replace the Portland cement (PC) with sustainable construction material. Similarly, Prosopis juliflora is a shrub or small tree in the family Fabaceae, a kind of mesquite which is considered to be a potential threat for ground water in South India. Hence, this has to eradicate so as to maintain the groundwater and also to effectively utilize its ash thereby reducing environmental pollution, this can be used as a partial replacement for cement. In this regard, this paper investigates the technical feasibility of using prosopis juliflora ash (PJA) as cementitious material by partially (10, 20, 30 and 40 %) replacing cement by prosopis juliflora ash. The mixes were evaluated for their fresh, physical and strength properties such as workability, density and compressive strength and the results were compared with the conventional mix

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Strength activity and microstructure of blended ultra-fine coal bottom ash-cement mortar

Cited by 76 publications

References 24 publications

On the Possibility of Using Recycled Mixed Aggregates and GICC Thermal Plant Wastes in Non-Structural Concrete Elements

On the Possibility of Using Recycled Mixed Aggregates and GICC Thermal Plant Wastes in Non-Structural Concrete Elements

Barrier effect of coal bottom ash-based geopolymers on soil contaminated by heavy metals

Effect of Utilizing Prosopis Juliflora Ash as Cementitious Material

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