### Particle packing and the rheology of concrete - ScienceDirect

2012-1-1 The packing density of an Appolonian packing with particles sizing from d min to d max is given as: [6.2] φ app = 1 − d min / d max d − d f. where d f is the fractal dimension and d is the space dimension. Numerical simulations give d f = 1.305 in two dimensions and d f = 2.474 in three dimensions. 6.6. Particle packing models

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2019-11-1 An increase in water content in excess of that needed to fill the voids among solid grains can separate cement grains and distance neighboring particles, thus resulting in lower particle packing. The solid concentration values for the models shown in Fig. 4 are 0.57 and 0.50 for the OWD and MWD, respectively, by using image analysis method ...

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For cement pastes with yield stress of 30 Pa, distance between coarse particle (48.51 μm) and fine particle (6.63 μm) was 5.00 μm, while distance between mid-sized particle (20.27 μm) and fine ...

Get price### Rheology of High-Performance Concrete ... - ScienceDirect

1998-5-1 The effect of ultrafine particles used as partial replacements for cement on the rheology of high-strength concrete (HSC) was investigated. Various proportions of 3 μm and 0.7 μm mean particle size limestone fillers, a finely ground silica, and silica fume were individually used as partial replacement for cement in 0.33 water/binder (w/b) ratio concrete mixtures.

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2014-2-28 Packing density of the solid particles is a fundamental parameter characterizing the properties of many granular systems; for example in the soil and concrete. Generally, SCC is characterized with a combination of water and solid phases, which the solid phases including coarse aggregates, fine aggregates, filler, cement and mineral admixtures.

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2016-2-1 Four real sands were studied (Cf. Fig. 2).The first sand is a naturally rounded river-sand (S 1 0/4 mm) whereas the three other sands S 2 (0/4 mm), S 3 (0/1 mm) and S 4 (0/4 mm) are produced from crushed rocks. In order to get rid of the effect of the initial differing particle size distribution, we sieved the tested sands and isolated three grain fractions shown in Fig. 3 (160–200 μm, 315 ...

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2010-3-1 In order to determine ϕ fm and ϕ m, a method developed by Liu can be implemented .Flow curves are obtained for different initial volume fractions. For each stress value of each curve, the apparent viscosity, η, is calculated by taking the slope (stress / strain rate), shown in Fig. 2, marked by the circles for an example stress of 68 Pa. Then, for each stress value, the value 1 − (η/η 0 ...

Get price### Crushed sand in concrete – Effect of particle shape in ...

2016-8-1 Studies of sand particle characteristics (shape, voids content, filler particle size distribution) and rheology of concrete (slump-flow, yield stress and plastic viscosity) show that the 0.125/2 mm particle shape and ≤0.125 mm filler properties are the most important factors for concrete workability when the sand grading 0/8 mm is kept constant.

Get price### Effect of Packing Density According to CPM on the

Particle-packing theory has been widely applied in the field of composite particle materials, and packing density (Φ) is an important parameter to evaluate the compactness of particle packing.In this paper, the rheological curves of fresh cement–fly ash–slag (PC-FA-SL) paste at 5 and 60 min resting time were tested through rheometer, and related rheological parameters were fitted by the ...

Get price### (PDF) Rheology of refractory concrete: An article review

The rheology of refractory concrete can be adapted properly according to the application manner and the specified requirements. Phase diagram of Al 2 O 3 -SiO 2 system. Expulsion of water by ...

Get price### Understanding the Rheology of Concrete - 1st Edition

2011-12-20 Chapter 6: Particle packing and the rheology of concrete. Abstract: 6.1 Introduction. 6.2 Compacity and porosity. 6.3 Packing of mono-size spheres. 6.4 Packing of identical particles. 6.5 Packing of non-identical particles. 6.6 Particle packing

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2013-2-3 DOI: 10.5592/OTMCJ.2013.2.3 Corpus ID: 29032672. Applying Theories of Particle Packing and Rheology to Concrete for Sustainable Development @article{Wong2013ApplyingTO, title={Applying Theories of Particle Packing and Rheology to Concrete for Sustainable Development}, author={V. Wong and Ka Wai Chan and A. Kwan}, journal={Organization, technology and management in construction:

Get price### Effect of Packing Density According to CPM on the

Particle-packing theory has been widely applied in the field of composite particle materials, and packing density (Φ) is an important parameter to evaluate the compactness of particle packing.In this paper, the rheological curves of fresh cement–fly ash–slag (PC-FA-SL) paste at 5 and 60 min resting time were tested through rheometer, and related rheological parameters were fitted by the ...

Get price### (PDF) Rheology of refractory concrete: An article review

The rheology of refractory concrete can be adapted properly according to the application manner and the specified requirements. Phase diagram of Al 2 O 3 -SiO 2 system. Expulsion of water by ...

Get price### Applying Theories of Particle Packing and Rheology to ...

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.

Get price### Particle Packing and Mixture Design Approach for Eco-SCC

2019-4-10 Particle Packing Density and Rheology Models to Predict Packing Density Ideal PSD of Solid Particles Methodology for Eco-SCC Mixture Design ... Consolidating Concrete (SCC), Proc., Inter. Conf. on High-Performance Concrete, Hong Kong, 2000, 1001

Get price### Fibre reinforcement and the rheology of concrete

2015-3-19 Fibre reinforcement and the rheology of concrete S. GRÜNEWALD, Delft University of Technology, The Netherlands Abstract: The addition of ﬁ bres can improve the performance of cementitious ... the dynamics and rheology of particles of large aspect ratio, or ﬁ bres, with the ... the packing density carried out with a variety of (stiff) steel ...

Get price### Andreasen Particle Packing Method on the Development

Results have shown that the Andreasen method may be used to change the rheology and, therefore, develop different geopolymer mixes. In the particular case of the development of geopolymer floor tiles, the best formulation is the one with a solution to solid rate of 1.4, Andreasen packing factor of 0.235, and quartz aggregate.

Get price### The 4-parameter Compressible Packing Model (CPM) for ...

2021-11-30 use models. This article deals with the particle packing and the concrete rheology by calling upon the last generation of the Compressible Packing Model (CPM): the 4-parameter CPM. To achieve its sustainable revolution, the concrete calls upon science to become a high-tech material.

Get price### Effect of Particle Packing on Flow Property and Strength ...

2020-10-13 Dense particle packing is generally formed by particles with varying particle size distributions, where voids can be successively filled up with smaller particles. Various models have been developed for achieving maximum density, or optimal packing, of aggregate particles in concrete, among which is the Andreasen and Andersen (AA) model. In

Get price### Applying Theories of Particle Packing and Rheology to ...

2013-2-3 DOI: 10.5592/OTMCJ.2013.2.3 Corpus ID: 29032672. Applying Theories of Particle Packing and Rheology to Concrete for Sustainable Development @article{Wong2013ApplyingTO, title={Applying Theories of Particle Packing and Rheology to Concrete for Sustainable Development}, author={V. Wong and Ka Wai Chan and A. Kwan}, journal={Organization, technology and management in construction:

Get price### Applying Theories of Particle Packing and Rheology to ...

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.

Get price### Elucidating how particle packing controls rheology and ...

2019-9-1 Request PDF Elucidating how particle packing controls rheology and strength development of dense cementitious suspensions Although maximizing particle packing strategy is

Get price### Particle packing and the rheology of concrete - CORE

Particle packing and the rheology of concrete . By Xavier Chateau. Topics: maximum packing density, particle size distribution, high concentration suspension, non-Newtonian rheology ...

Get price### Fibre reinforcement and the rheology of concrete

2015-3-19 Fibre reinforcement and the rheology of concrete S. GRÜNEWALD, Delft University of Technology, The Netherlands Abstract: The addition of ﬁ bres can improve the performance of cementitious ... the dynamics and rheology of particles of large aspect ratio, or ﬁ bres, with the ... the packing density carried out with a variety of (stiff) steel ...

Get price### Effect of Particle Packing on Flow Property and Strength ...

2020-10-13 Dense particle packing is generally formed by particles with varying particle size distributions, where voids can be successively filled up with smaller particles. Various models have been developed for achieving maximum density, or optimal packing, of aggregate particles in concrete, among which is the Andreasen and Andersen (AA) model. In

Get price### The 4-parameter Compressible Packing Model (CPM) for ...

2021-11-30 use models. This article deals with the particle packing and the concrete rheology by calling upon the last generation of the Compressible Packing Model (CPM): the 4-parameter CPM. To achieve its sustainable revolution, the concrete calls upon science to become a high-tech material.

Get price### Andreasen Particle Packing Method on the Development

Results have shown that the Andreasen method may be used to change the rheology and, therefore, develop different geopolymer mixes. In the particular case of the development of geopolymer floor tiles, the best formulation is the one with a solution to solid rate of 1.4, Andreasen packing factor of 0.235, and quartz aggregate.

Get price### TESTING AND MODELLING OF FRESH CONCRETE

2006-10-21 rheology of fresh concrete. The two main goals were:obtain rheologicaldata on concretes of various mixture compositions, and establish models to link mixture composition with rheological parameters. 1.Introduction This paper presents the results of an experimental ogrpr am dealing wh it the rheology of fresh concrete. The tw o main goals were:

Get price### Advanced Methods of Concrete Mixture Design

2019-11-1 Proportioning of concrete mixtures outside the normal range, such as DSP (Densified with Small Particle concrete with compressive strength of 150 to 200 MPa) and RPC (Reactive Powder Concrete, with compressive strength upto 800 MPa) is

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