On the modelling of the packing of fine particles

Yu, Aibing; Bridgwater, J.; Burbidge, Adam

doi:10.1016/s0032-5910(97)03219-1

Cited by 219 publications

(106 citation statements)

References 25 publications

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“…This cohesive force difficult the particles rearrangement and lead to lower packing fractions. In this case, the disorderorder transition takes place earlier at lower volume fractions (Yu et al, 1997;Feng and Yu, 2000;Xu et al, 2004). In nanofluids, if it is considered a process in which the solid content is increases through the continuous removal of water, capillary forces will be present at the last stage of the packing process and the final arrangement of the particles will be influenced by this force.…”

Section: ⎝⎠mentioning

confidence: 99%

Determination of the packing fraction of silica nanoparticles from the rheological and viscoelastic measurements of nanofluids

Mondragón

Juliá

Barba

et al. 2012

Chemical Engineering Science

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Section: ⎝⎠mentioning

confidence: 99%

Determination of the packing fraction of silica nanoparticles from the rheological and viscoelastic measurements of nanofluids

Mondragón

Juliá

Barba

et al. 2012

Chemical Engineering Science

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“…In most of the models with loosening and wall effects taken into account, the loosening effect is often explicitly accounted for by a loosening effect parameter, while the wall effect is explicitly considered by a wall effect parameter. Examples include the models developed by Stovall et al (1986), Yu and Standish (1987) Yu and Standish (1991), Yu et al (1996), Yu et al (1997), andde Larrard (1999). With two parameters account for the loosening and wall effects, these models may be collectively called the 2-parameter models.…”

Section: Particle Packing Theories and Modelsmentioning

confidence: 99%

“…For example, Yu et al (1996) and Yu et al (1997) also considered the effect of particle shape and absolute particle size on packing density, respectively. The effect of absolute size of particle is especially significant in packing of very fine particles such as powder.…”

Section: Particle Packing Theories and Modelsmentioning

confidence: 99%

“…The effect of absolute size of particle is especially significant in packing of very fine particles such as powder. Due to the relatively strong cohesive inter-particle forces such as Van der Waals and electrostatic force, fine particles do not behave individually and agglomerates may form, causing the packing density to be lower (Yu et al, 1997).…”

Section: Particle Packing Theories and Modelsmentioning

confidence: 99%

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Applying Theories of Particle Packing and Rheology to Concrete for Sustainable Development

Wong¹,

Chan²,

Kwan³

2013

OTMCJ

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o r g a n i z a t i o n , t e c h n o l o g y a n d m a n a g e m e n t i n c o n s t r u c t i o n · a n i n t e r n a t i o n a l j o u r n a l · 5(2)2013 844Concrete is one of the most important construction materials. However, it is not so compatible with the demands of sustainable development because manufacturing of cement generates a large amount of carbon dioxide and therefore cement consumption produces a huge carbon footprint. Currently, the cement consumption is generally lowered by adding supplementary cementitious materials to replace part of the cement. Nonetheless, in order to maintain performance, there is a limit to such cement replacement by supplementary cementitious materials. To further reduce the cement consumption, the total cementitious materials content has to be reduced. This requires the packing density of the aggregate particles to be maximized so that the amount of voids in the bulk volume of aggregate to be filled with cement paste could be minimized and the surface area of the aggregate particles to be minimized so that the amount of cement paste needed to form paste films coating the surfaces of aggregate particle for rheological performance could be minimized. Such optimization is not straightforward and modern concrete science based on particuology is needed. Herein, a number of new theories regarding particle packing and rheology of concrete, which are transforming conventional concrete technology into modern concrete science, are presented. These theories would help to develop a more scientific and systematic concrete mix design method for the production of high-performance concrete with minimum cement consumption.

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“…Hence, the volume fraction for RCP depends on the Hamaker constant and particle size [11,13,14]. Moreover, in nanofluids, capillary forces are present at the final stage of the packing process and these affect the packing [15][16][17]. In general, cohesive forces hinder the rearrangement of the particles and lead to lower packing fractions.…”

Section: Introductionmentioning

confidence: 99%

Microstructure and mechanical properties of grains of silica nanofluids dried in an acoustic levitator

Mondragón

Juliá

Barba

et al. 2012

Journal of the European Ceramic Society

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The microstructure and mechanical properties of spray-dried grains are key factors in many applications. In this work single droplets of silica nanofluids were dried in an acoustic levitator under different experimental conditions of solid mass fraction, pH value, salt concentration, drying temperature and initial droplet volume. ANOVA method was used to determine their influence on the final grain diameter, the shell thickness and the mechanical strength. The solid content and the droplet volume are the variables that exert an influence on these three properties. In addition, the mechanical strength is influenced by the pH value. The maximum packing fraction of the particles inside the shell was obtained by modelling the viscosity data with the Quemada equation. The packing fraction was then used to calculate the shell thickness. The internal microstructure of the grains was observed by SEM and the shell thickness was measured. Experimental and calculated results show good agreement.

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On the modelling of the packing of fine particles

Cited by 219 publications

References 25 publications

Determination of the packing fraction of silica nanoparticles from the rheological and viscoelastic measurements of nanofluids

Determination of the packing fraction of silica nanoparticles from the rheological and viscoelastic measurements of nanofluids

Applying Theories of Particle Packing and Rheology to Concrete for Sustainable Development

Microstructure and mechanical properties of grains of silica nanofluids dried in an acoustic levitator

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