Dissertation/Thesis Abstract

Multiscale structure-property relationships of ultra-high performance concrete
by Burcham, Megan Noel, M.S., Mississippi State University, 2016, 68; 10141618
Abstract (Summary)

The structure-property relationships of Ultra-High Performance Concrete (UHPC) were quantified using imaging techniques to characterize the multiscale hierarchical heterogeneities and the mechanical properties. Through image analysis the average size, percent area, nearest neighbor distance, and relative number density of each inclusion type was determined and then used to create Representative Volume Element (RVE) cubes for use in Finite Element (FE) analysis. Three different size scale RVEs at the mesoscale were found to best represent the material: the largest length scale (35 mm side length) included steel fibers, the middle length scale (0.54 mm side length) included large voids and silica sand grains, and the smallest length scale (0.04 mm side length) included small voids and unhydrated cement grains. By using three length scales of mesoscale FE modeling, the bridge of information to the macroscale cementitious material model is more physically based.

Indexing (document details)
Advisor: Horstemeyer, Mark F.
Commitee: Hammi, Youssef, Stone, Tonya W.
School: Mississippi State University
Department: Mechanical Engineering
School Location: United States -- Mississippi
Source: MAI 55/06M(E), Masters Abstracts International
Subjects: Civil engineering, Mechanical engineering
Keywords: Mesoscale, Ultra-high performance concrete
Publication Number: 10141618
ISBN: 978-1-339-96978-7
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