three dimensional shape analysis of concrete aggregate

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Three dimensional shape analysis of concrete aggregate ...

Feb 15, 2017  Performing 3-D shape analysis will avoid any 2-D artefacts, since image analysis only deals with 2-D projections of the particles. This paper presents detailed studies of the 3-D shape of VSI crushed concrete aggregate fines from 10 different Norwegian rock types, each in three fractions, using the μCT SH method.

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Three dimensional shape analysis of concrete aggregate ...

We studied the 3-D shape of concrete aggregate fines with particle sizes between 3 μm and 250 μm produced by high-speed vertical shaft impact (VSI) crushing of rock types from 10 different quarries representing a wide range of local Norwegian geology with respect to mineralogy and mechanical properties.This included igneous (intrusive and extrusive), metamorphic, and sedimentary rocks that ...

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Three-Dimensional Shape Analysis of Coarse Aggregates ...

May 07, 2017  The shape of aggregates used in concrete is an important parameter that helps determine many concrete properties. The mathematical technique of spherical harmonic analysis was recently demonstrated to be able to effectively analyze three dimensional information on aggregate shape.

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Three-dimensional shape analysis of coarse aggregates: New ...

Cement and Concrete Research 36 (2006) 1619— 1627 Cement and Concrete Research Three-dimensional shape analysis of coarse aggregates: New techniques for and preliminary results on several different coarse aggregates and reference rocks S.T. Erdogan a, P.N. Quiroga a, D. W. Fowler a, HA. Saleh b, R.A. Livingston b, E.J. Garboczi c'* ,

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Three-dimensional mathematical analysis of particle shape ...

of analysis, for 2-D representations of aggregates used in concrete and other shapes, has been carried out previously [25-27]. We review and extend this 2-D formulation here, in order to give a framework of understanding and to introduce concepts, before going into the full 3-D analysis. 2. 1\vo-dirnensionaJ illustration to base a shape ...

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Three-dimensional shape analysis of coarse aggregates: New ...

Sep 01, 2006  The shape of aggregates used in concrete is an important parameter that helps determine many concrete properties, especially the rheology of fresh concrete and early-age mechanical properties. This paper discusses the sample preparation and image analysis techniques necessary for obtaining an aggregate particle image in 3-D, using X-ray ...

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Three-Dimensional Shape Analysis of Coarse Aggregates ...

May 07, 2017  The shape of aggregates used in concrete is an important parameter that helps determine many concrete properties. The mathematical technique of spherical harmonic analysis was recently demonstrated to be able to effectively analyze three dimensional information on aggregate shape.

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Acquiring, Analyzing, and Using Complete Three

The shape of aggregates, from whatever source, plays a crucial role in determining the properties of the composite material in which they are embedded (e.g., asphaltic or portland cement concrete). To properly characterize this three-dimensional shape, three-dimensional information is needed.

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SHAPE CHARACTERIZATION OF CONCRETE AGGREGATE

Stereology allows reliable derivation of three-dimensional shape information for global characteri-sation of aggregates, whereas Fourier analysis can efficiently describe more detailed structure information, such as surface roughness and texture of the aggregate grains. Only a small part of the conventional shape

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(PDF) Shape characterization of concrete aggregate

Three-dimensional shape parameters. from ... In the first stage image analysis of aggregates has been done to evaluate the shape and texture of aggregates and in second stage concrete has been ...

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Three-dimensional mesoscale modeling of concrete with ...

Mar 29, 2021  2.2. Individual aggregate particle generation. In this study, the particle size of a 3D aggregate particle is defined as the diameter of its smallest enclosing sphere (SES) .For simplicity, an arbitrary-shaped aggregate is normalized to a unit aggregate through scaling of its SES to a unit sphere and moving of the origin of the local coordinate system to the center of the unit sphere.

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THE CORRELATION BETWEEN AGGREGATE SHAPE AND

In concrete, the shape of aggregate particles has been related to durability, workability, shear resistance, tensile strength, stiffness, and fatigue behavior. ... investigations on three-dimensional image analysis of aggregate (Kuo et al., 1996; Rao and Tutumluer, 2000). In addition, the each of

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Aggregates for Concrete

6.2—Definition of lightweight-aggregate concrete 6.3—Low-density concretes and associated aggregates 6.3.1—Structural lightweight concrete and associated aggregates 6.3.2—Moderate-strength lightweight concrete and associated aggregates 6.3.3—Properties Chapter 7—Recycled aggregates, p. E1-23 7.1—Introduction to recycled aggregates

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Particle shape analysis of coarse aggregate using digital ...

The particle shape characteristics of the coarse aggregate used can significantly affect the workability, strength, and durability of the concrete produced. However, traditionally, particle shape measurements have to be done in a manual way that is both cumbersome and time-consuming. Herein, digital image processing (DIP) techniques are used to analyze the particle shape characteristics of ...

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Three-dimensional shape analysis of coarse aggregates: New ...

Sep 15, 2006  Three-dimensional shape analysis of coarse aggregates: New techniques for and preliminary results on several different coarse aggregates and reference rocks

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(PDF) Characterization of fine aggregates in concrete by ...

Characterization of fine aggregates in concrete by different experimental approaches. Luc Courard. Frederic Michel. Eric Pirard. Luc Courard. Frederic Michel. Eric Pirard. Download PDF. Download Full PDF Package. This paper. A short summary of this paper. 37 Full PDFs related to this paper.

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Three-Dimensional Image Analysis of Aggregate Particles ...

The proposed image analysis method was verified by comparing the results obtained with manual measurements of particle dimensions for uniform size [passing 12.7 mm (1/2 in.) sieve and retained on 9.5 mm (3/8 in.) sieve] aggregates. Three-dimensional image analysis was also performed on five aggregates of standard size No. 89 from different ...

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THE CORRELATION BETWEEN AGGREGATE SHAPE AND

In concrete, the shape of aggregate particles has been related to durability, workability, shear resistance, tensile strength, stiffness, and fatigue behavior. ... investigations on three-dimensional image analysis of aggregate (Kuo et al., 1996; Rao and Tutumluer, 2000). In addition, the each of

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(PDF) Shape characterization of concrete aggregate

Three-dimensional shape parameters. from ... In the first stage image analysis of aggregates has been done to evaluate the shape and texture of aggregates and in second stage concrete has been ...

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Numerical Simulation of Aggregate Shapes of Three ...

Jul 03, 2013  The plane extension method was used to model aggregate shapes of three-dimensional (3D) concrete. In this method, the convexity condition requires that the volume formed by all the extension points and border planes be positive. A test method is adopted that involved summing the aggregate volumes to judge the intersection and overlap of aggregates.

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[PDF] Comparison of 2-D and 3-D shape analysis of concrete ...

DOI: 10.1016/J.POWTEC.2016.12.037 Corpus ID: 114091549. Comparison of 2-D and 3-D shape analysis of concrete aggregate fines from VSI crushing @article{Cepurtis2017ComparisonO2, title={Comparison of 2-D and 3-D shape analysis of concrete aggregate fines from VSI crushing}, author={Rolands Cepurītis and E. Garboczi and S. Jacobsen and K. Snyder}, journal={Powder

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Acquiring, analyzing, and using complete three-dimensional ...

To properly characterize this three-dimensional shape, three-dimensional information is needed. ... to 3-D Fourier analysis, and requires 3-D ... each aggregate in a mortar or concrete. The ...

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Test Methods for Characterizing Aggregate Shape, Texture ...

Garboczi, E. (2002). â Three-Dimensional Mathematical Analysis of Particle Shape Using X-Ray Tomography and Spherical Harmonics: Application to Aggregates Used in Concrete.â Cement and Concrete Research 32, 1621â 1638.

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An adaptive p-FEM for three-dimensional concrete aggregate ...

, Three-dimensional mathematical analysis of particle shape using X-ray tomography and spherical harmonics: Application to aggregates used in concrete, Cem. Concr. Res. 32:1621–1638, 2002. Crossref, ISI, Google Scholar; 14.

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Particle shape analysis of coarse aggregate using digital ...

The particle shape characteristics of the coarse aggregate used can significantly affect the workability, strength, and durability of the concrete produced. However, traditionally, particle shape measurements have to be done in a manual way that is both cumbersome and time-consuming. Herein, digital image processing (DIP) techniques are used to analyze the particle shape characteristics of ...

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Simulating the workability of fresh self-compacting ...

Oct 24, 2016  Garboczi EJ (2002) Three-dimensional mathematical analysis of particle shape using X-ray tomography and spherical harmonics: application to aggregate used in concrete. Cem Concr Res 32(10):1621–1638. Article Google Scholar 11. Liu GT, Gao ZG (2003) Random 3D aggregate structure for concrete.

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(PDF) Characterization of fine aggregates in concrete by ...

Characterization of fine aggregates in concrete by different experimental approaches. Luc Courard. Frederic Michel. Eric Pirard. Luc Courard. Frederic Michel. Eric Pirard. Download PDF. Download Full PDF Package. This paper. A short summary of this paper. 37 Full PDFs related to this paper.

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(PDF) The Correlation between Aggregate Shape and ...

The importance of the shape of aggregate particles on their mechanical behavior is well recognized. In concrete, the shape of aggregate particles has been related to durability, workability, shear resistance, tensile strength, stiffness, and fatigue

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NUMERICAL ANALYSIS OF REINFORCED LIGHTWEIGHT

suggested through Stanton [6] and nonlinear three-dimensional numerical analysis have been utilized to predict the load ±deflection performance of reinforced concrete slabs with hollow core (HC) using (ANSYS V.5.4) software. The 8-node brick element and the 6-node wedge element are utilized to represent the concrete. The

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Three-Dimensional Image Analysis of Aggregate Particles ...

The proposed image analysis method was verified by comparing the results obtained with manual measurements of particle dimensions for uniform size [passing 12.7 mm (1/2 in.) sieve and retained on 9.5 mm (3/8 in.) sieve] aggregates. Three-dimensional image analysis was also performed on five aggregates of standard size No. 89 from different ...

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Acquiring, Analyzing, and Using Complete Three-Dimensional ...

Apr 01, 2001  The shape of aggregates, from whatever source, plays a crucial role in determining the properties of the composite material in which they are embedded (e.g., asphaltic or portland cement concrete). To properly characterize this three-dimensional shape, three-dimensional information is

Get Price