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Портал Begell Электронная Бибилиотека e-Книги Журналы Справочники и Сборники статей Коллекции
International Journal for Multiscale Computational Engineering
Импакт фактор: 1.016 5-летний Импакт фактор: 1.194 SJR: 0.554 SNIP: 0.68 CiteScore™: 1.18

ISSN Печать: 1543-1649
ISSN Онлайн: 1940-4352

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International Journal for Multiscale Computational Engineering

DOI: 10.1615/IntJMultCompEng.v8.i6.30
pages 585-595

Concrete as a Hierarchical Structural Composite Material

Weidong Wu
Research Associate, Department of Civil Engineering, University of Mississippi, University, MS 38677, USA
Ahmed Al-Ostaz
Associate Professor, Department of Civil Engineering, University of Mississippi, University, MS 38677, USA
Alexander H.-D. Cheng
Professor, Department of Civil Engineering, University of Mississippi, University, MS 38677, USA
Chung R. Song
Associate Professor, Department of Civil Engineering, University of Mississippi, University, MS 38677, USA

Краткое описание

A multiscale modeling methodology that relates the nanostructure of concrete to its micro and macro properties is presented. This work attempts to establish a framework for understanding the relations among chemical composition, microstructure morphology, and the macroscale mechanical properties of concrete constituents. The simulation is based on four levels of a hierarchal structural model, starting from the molecular dynamics simulation of hydrated cement solid nanoparticles (e.g., C{S{H, and calcium hydroxide), all the way up to concrete. To validate the theoretical model, a nondestructive testing technique, resonant ultrasound spectroscopy (RUS), is used to measure the elastic constants of hydrated cement paste. The results showed good agreement between theoretically predicted and experimentally measured properties.


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