Transfers in Porous Media

Quintard, Michel

doi:10.1615/specialtopicsrevporousmedia.2015013158

Cited by 3 publications

(1 citation statement)

References 82 publications

(114 reference statements)

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“…The thermal resistance of wall is = 4,223 (m 2 ⋅ ∘ C)/W; the vapor permeability coefficient is = 0,021 mg/(m⋅h⋅Pa). The fiber-reinforced types of concrete developed on basis of the composite binder can be used in the construction of high-rise buildings [57].…”

Section: Resultsmentioning

confidence: 99%

Mechanical Properties of Fiber-Reinforced Concrete Using Composite Binders

Fediuk

Smoliakov

Muraviov

2017

Advances in Materials Science and Engineering

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This paper investigates the creation of high-density impermeable concrete. The effect of the "cement, fly ash, and limestone" composite binders obtained by joint grinding with superplasticizer in the varioplanetary mill on the process of structure formation was studied. Compaction of structure on micro-and nanoscale levels was characterized by different techniques: X-ray diffraction, DTA-TGA, and electron microscopy. Results showed that the grinding of active mineral supplements allows crystallization centers to be created by ash particles as a result of the binding of Ca(OH) 2 during hardening alite, which intensifies the clinker minerals hydration process; the presence of fine grains limestone also leads to the hydrocarboaluminates calcium formation. The relation between cement stone neoplasms composition as well as fibrous concrete porosity and permeability of composite at nanoscale level for use of composite binders with polydispersed mineral supplements was revealed. The results are of potential importance in developing the wide range of fine-grained fiber-reinforced concrete with a compressive strength more than 100 MPa, with low permeability under actual operating conditions.

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Section: Resultsmentioning

confidence: 99%

Mechanical Properties of Fiber-Reinforced Concrete Using Composite Binders

Fediuk

Smoliakov

Muraviov

2017

Advances in Materials Science and Engineering

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Environmental Hazard of Some Types of Expanded Polystyrene

Fediuk

Pak

Ginevskiy

et al. 2018

IOP Conf. Ser.: Earth Environ. Sci.

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The case for examining fluid flow in municipal solid waste at the pore-scale – A review

2019

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23In this paper, we discuss recent efforts from the last 20 years to describe transport in municipal 24 solid waste (MSW). We first discuss emerging themes in the field to draw the reader's attention to 25 a series of significant challenges. We then examine contributions regarding the modelling of 26 leachate flow to study transport via mechanistic and stochastic approaches, at a variety of scales. 27Since MSW is a multiphase, biogeochemically active porous medium, and with the aim of 28 providing a picture of transport phenomena in a wider context, we then discuss a selection of 29 studies on leachate flow incorporating some of the complex landfill processes (e.g. biodegradation, 30 settlement). It is clear from the literature survey that our understanding of transport phenomena 31 exhibited by landfilled waste is far from complete. Attempts to model transport have largely 32 consisted of applying representative elementary-scale models (the smallest volume which can be 33 considered representative of the entire waste mass). Due to our limited understanding of fluid flow 34 through landfilled waste, and the influence of simultaneously occurring biogeomechanical 35 processes within the waste mass, elementary-scale models have been unable to fully describe the 36 flow behaviour of MSW. Pore-scale modelling and experimental studies have proven to be a 37 promising approach to study fluid flow through complex porous media. Here, we suggest that pore-38 scale modelling and experimental work may provide valuable insights into transport phenomena 39 exhibited by MSW, which could then be used to revise elementary-scale models for improved 40 representation of field-scale problems. 41 42 43 44 4 KEYWORDS 45 municipal solid waste; modelling leachate transport; landfill; waste heterogeneity; preferential 46 flow. 47 6 2000; Rosqvist et al. , 2005) with some studies focusing on conceptual models of the pore structure 89 of MSW at the elementary scale Woodman et al., , 2015 Woodman et al., 90 2013). However, to date, our understanding of the flow of leachate, biogas and the impact of other 91 simultaneously occurring biogeochemical processes on flow and transport is incomplete, 92 especially at the pore-scale. This is particularly important to note since it is these pore-scale 93 processes, with the possibility of field-scale processes dominating particular facets at particular 94 times, that ultimately govern the overall behaviour in reactive porous media (Blunt, 2001; Blunt 95 et al., 2013;Menke et al., 2017;Xiong, 2015;Xiong et al., 2016). It is likely that processes average 96 over a wide range of different scales, which would explain the success of the widely used empirical 97 landfill gas models. The real challenge lies in the integration of modelling processes at all the 98 scales and understanding how averaging works. It is clear that one of the most difficult aspects to 99 model is the inherent heterogeneity of the waste mass, and the impact of different waste 100 components (e.g. their shapes, sizes and varyi...

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Transfers in Porous Media

Cited by 3 publications

References 82 publications

Mechanical Properties of Fiber-Reinforced Concrete Using Composite Binders

Mechanical Properties of Fiber-Reinforced Concrete Using Composite Binders

Environmental Hazard of Some Types of Expanded Polystyrene

The case for examining fluid flow in municipal solid waste at the pore-scale – A review

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