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International Journal for Multiscale Computational Engineering
IF: 1.016 5-Year IF: 1.194 SJR: 0.452 SNIP: 0.68 CiteScore™: 1.18

ISSN Print: 1543-1649
ISSN Online: 1940-4352

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

ABSTRACT

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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