A Numerical Approach for the Simulation of Cementitious Materials

W. G. Yang () and Z. Q. Guo ()
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W. G. Yang: Beijing Jiaotong University, School of Civil Engineering & Architecture
Z. Q. Guo: Delft University of Technology, Faculty of Civil Engineering and Geosciences

A chapter in Computational Mechanics, 2007, pp 296-296 from Springer

Abstract: Abstract Cementitious material can be considered consisting of particulate elements on the levels of the microstructure and meso-structure. HADES is a concurrent algorithm-based program, designed to simulate the mixing or flow of granular material encompassed arbitrary particle shapes. In this paper, a specific technology is employed to generate the single aggregate particle of arbitrary shape in HADES. (In this technology, a universal ellipsoid is first generated, then with the modification of certain parameters different kinds of three-dimensional shapes are generated accordingly. See Figure 1). Then with the HADES toolbox materials structure can be formed according to a given size distribution and shape description of particles. Based on these work, concrete is taken as an example of a typical cementitious material. With the simulated meso-structure of concrete from HADES, interfacial transition zone (ITZ) is enriched and a special tool is employed for the meshing of aggregates, cement paste and ITZ. After that finite element method is used for the analysis of stress and strain within the meso-structure (See Figure 2). The calculation results show that the approach to simulate cementitious material, of HADES packing, then meshing and finally finite elements analysis, is feasible and effective and the numerical prediction of elastic modulus of concrete consisting of three-phase material is in agreement with effective. Figure 1 Single particle generated with different parameters Figure 2 Concrete numerical simulation process with aggregate of nine particles

Date: 2007
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DOI: 10.1007/978-3-540-75999-7_96

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