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Discrete element approach to packing of arbitraryshaped particles in concrete

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The shapes of real particles using in concrete, from coarse aggregate to mineral admixture, are irregular. The influence of particle shape on behavior of packing is enormous, so on the properties of fresh concrete and matured concrete. Definition of actual grain shape as well as simulation in a discrete element simulation (DES) approach is complicated, however. Spherical grain shape is theref[...]

Patchy nature of cement and concrete revealed by physical discrete element simulation approach

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Microscopy observations have revealed the physical existence of a so-called patch microstructure in concrete. This paper presents some evidence that patchy nature is also exist in meso-level, such as distribution of aggregate grain and fibers in concrete. Systematic experimental research into dispersion characteristics of "particles" would be time-consuming and thus expensive. Physical [...]

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